Endangered and Threatened Wildlife and Plants; Removing San Benito Evening-Primrose (Camissonia benitensis, 33060-33078 [2020-11024]
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33060
Federal Register / Vol. 85, No. 105 / Monday, June 1, 2020 / Proposed Rules
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II. What action is EPA taking?
EPA is announcing receipt of a
pesticide petition filed under section
408 of the Federal Food, Drug, and
Cosmetic Act (FFDCA), 21 U.S.C. 346a,
requesting the establishment or
modification of regulations in 40 CFR
part 180 for residues of a pesticide
chemical in or on various food
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comment on the request before
responding to the petitioner. EPA is not
proposing any particular action at this
time. EPA has determined that the
pesticide petition described in this
document contains data or information
prescribed in FFDCA section 408(d)(2),
21 U.S.C. 346a(d)(2); however, EPA has
not fully evaluated the sufficiency of the
submitted data at this time or whether
the data support granting of the
pesticide petition. After considering the
public comments, EPA intends to
evaluate whether and what action may
be warranted. Additional data may be
needed before EPA can make a final
determination on this pesticide petition.
Pursuant to 40 CFR 180.7(f), a
summary of the petition that is the
subject of this document, prepared by
the petitioner, is included in a docket
EPA has created for this rulemaking.
The docket for this petition is available
at https://www.regulations.gov.
As specified in FFDCA section
408(d)(3), 21 U.S.C. 346a(d)(3), EPA is
publishing notice of the petition so that
the public has an opportunity to
comment on this request for the
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establishment or modification of
regulations for residues of a pesticide
chemical in or on various food
commodities. Further information on
the petition may be obtained through
the petition summary referenced in this
unit.
PP 9F8780. Syngenta Crop Protection,
LLC, 410 South Swing Rd., Greensboro,
NC 27409, requests to amend an
exemption from the requirement of a
tolerance in 40 CFR 180.1254 to include
residues of the fungicide Aspergillus
flavus strain NRRL 21882 in or on all
food and feed commodities of almond;
corn, field; corn, pop; corn, sweet;
peanut; and pistachio. The petitioner
believes no analytical method is needed
because a petition for an amendment to
the currently existing exemption from
tolerance for Aspergillus flavus strain
NRRL 21882 has been submitted. Note:
In the Federal Register of February 10,
2020 (85 FR 7499) (FRL–10004–54),
EPA announced the filing of this
petition to amend an exemption from
the requirement of a tolerance for
residues of Aspergillus flavus strain
NRRL 21882 to include residues in or
on almond and pistachio. Since that
time, the petitioner provided a revised
petition requesting a revision to the
existing tolerance exemption to include
all food and feed commodities of
almond; corn, field; corn, pop; corn,
sweet; peanut; and pistachio. In order to
give the public an opportunity to
comment on this new information, EPA
is republishing its receipt of this
tolerance exemption petition filing with
an updated and accurate description.
Authority: 21 U.S.C. 346a.
Dated: May 13, 2020.
Robert McNally,
Director, Biopesticides and Pollution
Prevention Division, Office of Pesticide
Programs.
[FR Doc. 2020–11574 Filed 5–29–20; 8:45 am]
BILLING CODE 6560–50–P
DEPARTMENT OF THE INTERIOR
Fish and Wildlife Service
50 CFR Part 17
[Docket No. FWS–R8–ES–2019–0065;
4500030113]
RIN 1018–BE11
Endangered and Threatened Wildlife
and Plants; Removing San Benito
Evening-Primrose (Camissonia
benitensis) From the Federal List of
Endangered and Threatened Plants
AGENCY:
Fish and Wildlife Service,
Interior.
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ACTION:
Proposed rule.
We, the U.S. Fish and
Wildlife Service (Service or USFWS),
propose to remove San Benito eveningprimrose (Camissonia benitensis) from
the Federal List of Endangered and
Threatened Plants. This determination
is based on a thorough review of the
best available scientific and commercial
information, which indicates that the
threats to the species have been reduced
or eliminated so that the plant no longer
meets the definition of an endangered or
threatened species under the
Endangered Species Act of 1973, as
amended (Act). We are seeking
information and comments from the
public regarding this proposed rule and
the draft post-delisting monitoring plan
for San Benito evening-primrose.
DATES: We will accept comments
received or postmarked on or before July
31, 2020. Comments submitted
electronically using the Federal
eRulemaking Portal (see ADDRESSES,
below) must be received by 11:59 p.m.
Eastern Time on the closing date. We
must receive requests for public
hearings, in writing, at the address
shown in FOR FURTHER INFORMATION
CONTACT by July 16, 2020.
ADDRESSES:
Comment submission: You may
submit comments by one of the
following methods:
(1) Electronically: Go to the Federal
eRulemaking Portal: https://
www.regulations.gov. In the Search box,
enter FWS–R8–ES–2019–0065, which is
the docket number for this rulemaking.
Then click on the Search button. On the
resulting page, in the Search panel on
the left side of the screen, under the
Document Type heading, click on the
Proposed Rules link to locate this
document. You may submit a comment
by clicking on ‘‘Comment Now!’’
(2) By hard copy: Submit by U.S. mail
to: Public Comments Processing, Attn:
FWS–R8–ES–2019–0065; U.S. Fish and
Wildlife Service, MS: JAO/1N; 5275
Leesburg Pike, Falls Church, VA 22041–
3803.
We request that you send comments
only by the methods described above.
We will post all comments on https://
www.regulations.gov. This generally
means that we will post any personal
information you provide us (see
Information Requested, below, for more
information).
Document availability: The recovery
plan, 5-year review summary, and draft
post-delisting monitoring plan
referenced in this document are
available at https://www.regulations.gov
under Docket No. FWS–R8–ES–2019–
0065.
SUMMARY:
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Federal Register / Vol. 85, No. 105 / Monday, June 1, 2020 / Proposed Rules
FOR FURTHER INFORMATION CONTACT:
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Stephen P. Henry, Field Supervisor,
U.S. Fish and Wildlife Service, Ventura
Fish and Wildlife Office, 2493 Portola
Road, Suite B, Ventura, CA 93003; by
telephone 805–644–1766. If you use a
telecommunications device for the deaf
(TDD), call the Federal Relay Service at
800–877–8339.
SUPPLEMENTARY INFORMATION:
Executive Summary
Why we need to publish a rule. Under
the Act, a species may warrant removal
(i.e., ‘‘delisting’’) from the Federal List
of Endangered and Threatened Plants if
it no longer meets the definition of an
endangered species or a threatened
species. Delisting a species can only be
completed by issuing a rule.
What this document does. We
propose to remove San Benito eveningprimrose (Camissonia benitensis) from
the Federal List of Endangered and
Threatened Plants.
The basis for our action. Under the
Act, we may determine that a species is
an endangered or threatened species
because of any of five factors: (A) The
present or threatened destruction,
modification, or curtailment of its
habitat or range; (B) overutilization for
commercial, recreational, scientific, or
educational purposes; (C) disease or
predation; (D) the inadequacy of
existing regulatory mechanisms; or (E)
other natural or manmade factors
affecting its continued existence. We
have determined that the threats to the
species have been reduced or eliminated
so that the plant no longer meets the
definition of an endangered or
threatened species under the Act. We
are seeking information and comments
from the public regarding this proposed
rule and the draft post-delisting
monitoring plan for the species. We will
also seek peer review.
San Benito evening-primrose, a small
annual plant with bright yellow flowers,
is found in the central coast range in
California’s San Benito, Monterey, and
Fresno counties. The scientific
community’s understanding of the San
Benito evening-primrose’s ecology and
habitat has improved since time of
listing due to the efforts of the Bureau
of Land Management (BLM) to survey
and study the plant over the last three
decades. We listed San Benito eveningprimrose as threatened in 1985 due to
ongoing threats of motorized recreation
activities and commercial mining
operations. At the time of listing, the
San Benito evening-primrose was
documented in only nine locations in a
small area of only San Benito County.
Off-highway vehicle recreation, the
greatest persistent threat to the species,
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has been reduced to levels that no
longer pose a significant threat of
extinction to San Benito eveningprimrose or its habitat due to the closure
of the Serpentine Area of Critical
Environmental Concern, and the
restriction of off-highway vehicle use
within the Clear Creek Management
Area. Most significantly, the species is
much more wide-ranging and common
than originally known and occurs across
a broader range of habitat types (BLM
2018, p. 32). The number of known
occurrences has increased from nine to
79 and the range of the species is now
known from three watersheds and
occupied habitat covers 63.2 acres (25.6
ha). The species persists through
periods of disturbance due to the
persistence of a robust and long lived
seedbank that facilitates
reestablishment, dispersal, and buffers
against stochastic events. Annual
surveys of San Benito evening-primrose
have demonstrated a large amount of
interannual variation in numbers of
individuals observed. We conclude that
the 27 occurrences that have been
monitored since 1983 have remained
relatively stable around a 5-year moving
average when the abnormally high
count year (1988) is considered.
Furthermore, the significant increase in
the number of occurrences detected by
recent BLM surveys is not represented
in the analysis of the 27 occurrences
that were known at the time the
Recovery Plan was written. The existing
regulatory mechanisms in place are
adequate to ensure the continued
persistence of San Benito eveningprimrose occurrences and suitable
potential habitat. Based on the best
available information, the intent of the
recovery criteria and the recovery goal
identified in the Recovery Plan has been
met for the species. We, therefore,
conclude that San Benito eveningprimrose is no longer a threatened
species throughout its range, nor is it
likely to become so within the
foreseeable future.
Peer review. In accordance with our
joint policy on peer review published in
the Federal Register on July 1, 1994 (59
FR 34270), and our August 22, 2016,
memorandum updating and clarifying
the role of peer review of listing actions
under the Act, we will seek the expert
opinions of at least three appropriate
specialists regarding this proposed rule.
The purpose of peer review is to ensure
that our classification determinations
are based on scientifically sound data,
assumptions, and analyses. The peer
reviewers have expertise in the biology,
habitat, and threats to the species. A
peer review panel will conduct an
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assessment of the proposed rule and the
specific assumptions and conclusions
regarding the proposed delisting. This
assessment will be completed during
the public comment period.
Because we will consider all
comments and information we receive
during the comment period, our final
determinations may differ from this
proposal. Based on the new information
we receive (and any comments on that
new information), we may conclude that
the species is still warranted for listing.
Such final decisions would be a logical
outgrowth of this proposal, as long as
we: (1) Base the decisions on the best
scientific and commercial data available
after considering all of the relevant
factors; (2) do not rely on factors
Congress has not intended us to
consider; and (3) articulate a rational
connection between the facts found and
the conclusions made, including why
we changed our conclusion.
Information Requested
We intend any final action resulting
from this proposal will be based on the
best scientific and commercial data
available and be as accurate and as
effective as possible. Therefore, we
request comments or information from
other governmental agencies, Native
American tribes, the scientific
community, industry, or other
interested parties concerning this
proposed rule. We particularly seek
comments concerning:
(1) The extent of any current threats
to the species and its habitat.
(2) The potential for shrub
encroachment to reduce suitable habitat
for the species.
(3) The ability of previously degraded
habitat to return to suitable habitat for
colonization and/or reintroduction.
(4) The lasting effects of past offhighway vehicle (OHV) use and the
level of natural restoration to those areas
of suitable habitat disturbed by OHV
use.
(5) The potential for climate change to
either positively or negatively affect the
species.
(6) The climatic conditions under
which germination naturally occurs and
by which seed set is initiated.
(7) The monitoring guidelines
proposed for the post-delisting
monitoring plan and whether they
appropriately characterize the extent of
disturbance and can adequately identify
the thresholds at which San Benito
evening-primrose can persist.
Please include sufficient information
with your submission (such as scientific
journal articles or other publications) to
allow us to verify any scientific or
commercial information you include.
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Please note that submissions merely
stating support for, or opposition to, the
action under consideration without
providing supporting information,
although noted, will not be considered
in making a determination, as section
4(b)(1)(A) of the Act directs that
determinations as to whether any
species is an endangered or threatened
species must be made ‘‘solely on the
basis of the best scientific and
commercial data available.’’
You may submit your comments and
materials concerning this proposed rule
by one of the methods listed in
ADDRESSES. We request that you send
comments only by the methods
described in ADDRESSES.
If you submit information via https://
www.regulations.gov, your entire
submission—including any personal
identifying information—will be posted
on the website. If your submission is
made via a hardcopy that includes
personal identifying information, you
may request at the top of your document
that we withhold this information from
public review. However, we cannot
guarantee that we will be able to do so.
We will post all hardcopy submissions
on https://www.regulations.gov.
Comments and materials we receive,
as well as supporting documentation we
used in preparing this proposed rule,
will be available for public inspection
on https://www.regulations.gov, or by
appointment, during normal business
hours, at the U.S. Fish and Wildlife
Service, Ventura Fish and Wildlife
Office (see FOR FURTHER INFORMATION
CONTACT).
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Public Hearing
Section 4(b)(5)(E) of the Act provides
for one or more public hearings on this
proposal, if requested. We must receive
requests for public hearings, in writing,
at the address shown in FOR FURTHER
INFORMATION CONTACT by the date shown
in DATES. We will schedule a public
hearing on this proposal, if any are
requested, and announce the date, time,
and place of those hearings, as well as
how to obtain reasonable
accommodation, in the Federal Register
at least 15 days before the first hearing.
For the immediate future, we will
provide these public hearings using
webinars that will be announced on the
Service’s website, in addition to the
Federal Register. The use of these
virtual public hearings is consistent
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with our regulation at 50 CFR
424.16(c)(3).
Previous Federal Actions
On February 12, 1985, we listed San
Benito evening-primrose as a threatened
species (50 FR 5755–5759) based
primarily on the threats from motorized
recreation and active gravel mining.
Nine occurrences of the plant were
known at the time, ranging from only 10
to 100 individuals each (50 FR 5755). At
the time of listing, we found that
designation of critical habitat was not
prudent, and no further action regarding
critical habitat has been taken (50 FR
5757–5759). Accordingly, we do not
address critical habitat in this proposed
rule.
A recovery plan for San Benito
evening-primrose was published on
September 19, 2006 (71 FR 54837–
54838) (Recovery Plan). In the Recovery
Plan, we noted the need to fully map the
extent and range of the species,
acknowledging that additional
occurrences had been found since
listing in 1985. We also noted that,
during 20 years of monitoring known
occurrences, only 2 of those years had
produced large numbers of individuals.
This determination led recovery actions
to focus heavily on preserving suitable
habitat and the seed bank since target
numbers of individuals were unlikely to
be reliable indicators of population
health (USFWS 2006, p. 51).
In 2009, the Service conducted a 5year review pursuant to 16 U.S.C.
1533(c)(2)(A) to evaluate whether the
species’ status had changed since listing
in 1985 and publication of the Recovery
Plan in 2006 (USFWS 2009, entire). In
the 5-year review, we reported an
increase in the number of known suboccurrences from 53 in 2006 at the time
of the Recovery Plan to 69 in 2009 as
well as changes in the management of
OHV use.
We published a notice announcing
the initiation of a 5-year review of the
status of San Benito evening-primrose
on June 18, 2018 (83 FR 28251–28254).
This proposed rule to remove San
Benito evening-primrose from the
Federal List of Endangered and
Threatened Plants also serves as a status
review for the species.
Supporting Documents
In 2009, a 5-year review was prepared
for San Benito evening-primrose. At the
time, the review represented a
compilation of the best scientific and
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commercial data available concerning
the status of the species, including the
impacts of past, present, and future
factors (both negative and beneficial)
affecting the species. Where we have
more recent information than was
contained in the 5-year review, we have
incorporated it as appropriate into this
proposed rule.
I. Proposed Delisting Determination
Background
San Benito evening-primrose is a
small, yellow-flowered, annual species
in the evening-primrose family
(Onagraceae). The plant is slender with
narrowly elliptic leaves 0.3 inches (in)
(7–20 millimeters (mm)) in length and
minutely serrate. The stem may be erect
or decumbent (lying on the ground with
the extremity curving upward) and
ranges in height from 1.2 to 7.9 in (3–
20 centimeters (cm)) with branches
widely spreading. Petals are 0.1 to 0.2
in (3.5 to 4 mm) and may fade from
yellow to reddish (Wagner 2012, pp.
925–929). San Benito evening-primrose
is autogamous (self-fertilizing) and
produces seed that persists for long
periods of time, which creates wellestablished seed banks where the
species occurs (Taylor 1990, pp. 7–8).
San Benito evening-primrose is
known only from the southeastern
portion of San Benito County, the
western edge of Fresno County, and the
northeastern edge of Monterey County,
largely within the New Idria
serpentinite mass (figure 1). Serpentine
is a rock formed from ancient volcanic
activity that results in minerals with a
greenish and brownish appearance such
as antigorite, lizardite, and chrysotile.
The New Idria serpentinite mass covers
approximately 13,000 hectares (32,124
acres) and is one of the largest
serpentine formations in the southern
Coast Ranges of California (Rajakaruna
et al. 2011, p. 698). Average rainfall in
areas occupied by San Benito eveningprimrose is 16–17 in (40–42 cm)
annually with temperatures ranging
from lows of 21 to 34 degrees
Fahrenheit (F) (¥6.7 to ¥1.1 degrees
Celsius (C)) in the winter to highs of 90
to 100 degrees F (32.2 to 37.8 degrees C)
in the summer (USFWS 2009, p. 8).
Occupied habitat of San Benito eveningprimrose occurs primarily on land
managed by the Bureau of Land
Management (BLM) (36.5 acres), as well
as on private land (26.6 acres).
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San Benito evening-primrose occurs
at elevations between 1,969 to 3,938 feet
(ft) (600 and 1,200 meters (m)) on
alluvial terraces and upland geologic
transition zones containing sandy to
gravelly serpentine derived soil, but
may also be found on greywacke, chert,
and syenite derived soils (Raven 1969,
pp. 332–333, Taylor 1990, pp. 24–36,
39–42, BLM 2018, pp. 17–19). Alluvial
terrace habitat is characterized by
serpentine soils that are deeper and
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better developed than neighboring
slopes, generally flat (<3 degrees slope),
and contain less than 25 percent cover
of chaparral or woody vegetation
(Taylor 1990, pp. 69, 71–72, USFWS
2006, p. 13). Geologic transition zone
habitat is characterized by sandy soils
within uplands on slopes between 15
degrees and 60 degrees as well as rock
outcrops and talus (Dick et al. 2014, p.
167, BLM 2018, p. 18). The transition
zone that the habitat type refers to is the
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boundary between serpentine masses
and non-serpentine rock (BLM 2014, pp.
110–112). Generally, alluvial habitat is
found closer to water and in association
with Quercus durata (leather oak),
Arctostaphylos spp. (manzanita), Pinus
jeffreyi (Jeffrey pine), P. sabiniana (bull
pine), and P. coulteri (Coulter pine).
Geologic transition zone habitat is found
far from water and in association with
Q. douglassii (blue oak), Juniperus
californicus (California juniper), and Q.
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berberidifolia (scrub oak) (Dick et al.
2014, p. 167).
The BLM first identified the geologic
transition zone habitat type in 2009
through surveys of potential habitat and
known occurrences of San Benito
evening-primrose. The discovery of the
new habitat type, and associated new
occurrences, increased the number of
known point locations from 69 in 2009
to 658 in 2018 (BLM 2018, p. 32). The
difference between geologic transition
zone habitat and alluvial terrace habitat
suggested the possibility that there were
two genetically distinct lineages of San
Benito evening-primrose or that the
species may be hybridizing with the
close relatives plains evening primrose
(C. contorta) and sandysoil suncup (C.
strigulosa). However, it was determined
that hybridization was not occurring
and that watersheds and habitat type
did not explain any genetic differences
that were identified (Dick et al. 2014,
entire). The findings suggest that the
known occurrences of San Benito
evening-primrose are all part of the
same genetic population (Dick et al.
2014, entire).
The BLM has been conducting
surveys for San Benito evening-primrose
since 1980 within the Clear Creek
Management Area, where the majority
of sub-occurrences are located. The
surveys conducted by the BLM have
resulted in an increase in the
understanding of the range of the
species, habitat preferences, life history,
and numbers (BLM 2018, entire). The
monitoring has resulted in the
identification of 658 point locations
occurring within and outside of the
boundary of the Clear Creek
Management Area (CCMA), including a
substantial number on private land (5
known point locations in 2009 and 290
known point locations in 2018). The
species’ current known range is
bordered on the north by New Idria
Road near the confluence of Larious
Creek and San Carlos Creek, to the
South at the Monterey County Line near
Lewis Creek, to the west near the
Hernandez Reservoir, and to the east by
the eastern boundary of the serpentine
area of critical environmental concern
(ACEC), an area of approximately 307
square miles. The BLM’s ACEC
designations highlight areas where
special management attention is needed
to protect important historical, cultural,
and scenic values, or fish and wildlife
or other natural resources. ACECs can
also be designated to protect human life
and safety from natural hazards. The
known occurrences cover 64 ac (26 ha)
of public and private land, and potential
suitable habitat is currently estimated at
260 ac (105 ha) (BLM 2018, p. 31). The
findings of the BLM have been
documented in annual reports from
2009 to 2018 and are the source of the
most recent information regarding the
status of the occurrences of San Benito
evening-primrose.
This document presents data that was
provided by the BLM within the 2018
Annual Report (BLM 2018, entire) and
from spatial data provided by the BLM
in 2018. Within this report a single
‘‘occurrence’’ refers to areas where San
Benito evening-primrose has been
mapped. Mapped areas within 0.25 mi
(0.4 km) of each other, but
discontinuous, are considered a single
occurrence consisting of multiple suboccurrences. The BLM has recorded
point data, in addition to polygon suboccurrences for San Benito eveningprimrose, which are referred to as point
locations in this report. Point locations
are mapped point features while suboccurrences are mapped polygon
features. In 2018, 79 occurrences,
consisting of 519 sub-occurrences, and
658 point locations were mapped by the
BLM (table 1) (BLM 2018, p. 32; BLM
2018, spatial data).
TABLE 1—2018 BLM SURVEY RESULTS
2018 San Benito evening-primrose (Camissonia benitensis)
survey results .......................................................................
Number of
occurrences
Number of
sub-occurrences
Number of
point locations
Acres
(hectares)
79
519
658
63.2 (25.6)
Occurrences consist of sub-occurrences (mapped polygons) within 0.25 mile of each other. Point locations are reported in the 2018 Annual
Report (BLM 2018 p. 32). Acreage data are derived from the spatial extent of the mapped occurrences.
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The BLM compared historical
occurrence data to their point location
counts in their annual reports, and
Service used those comparisons in the
Recovery Plan (USFWS 2006, entire)
and 5-Year Review (USFWS 2009,
entire). Here, we have chosen to update
the occurrence organization because the
numbers of occurrences, suboccurrences, and point locations have
increased dramatically since 2009.
Table 1 illustrates the nested nature of
the way the data are presented. When
possible we use the same terminology as
previous reports.
Recovery and Recovery Plan
Implementation
Section 4(f) of the Act directs us to
develop and implement recovery plans
for the conservation and survival of
endangered and threatened species
unless we determine that such a plan
will not promote the conservation of the
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species. Under section 4(f)(1)(B)(ii),
recovery plans must, to the maximum
extent practicable, include: ‘‘[O]bjective,
measurable criteria which, when met,
would result in a determination, in
accordance with the provisions of
[section 4 of the Act], that the species
be removed from the list.’’ However,
revisions to the list (adding, removing,
or reclassifying a species) must reflect
determinations made in accordance
with sections 4(a)(1) and 4(b) of the Act.
Section 4(a)(1) requires that the
Secretary determine whether a species
is an endangered species or threatened
species (or not) because of one or more
of five threat factors. Section 4(b) of the
Act requires that the determination be
made ‘‘solely on the basis of the best
scientific and commercial data
available.’’ Therefore, recovery criteria
should help indicate when we would
anticipate that an analysis of the
species’ status under section 4(a)(1)
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would result in a determination that the
species is no longer an endangered
species or threatened species.
Thus, while recovery plans provide
important guidance to the Service,
States, and other partners on methods of
minimizing threats to listed species and
measurable objectives against which to
measure progress towards recovery, they
are not regulatory documents and
cannot substitute for the determinations
and promulgation of regulations
required under section 4(a)(1) of the
Act. A decision to revise the status of or
remove a species from the Federal List
of Endangered and Threatened Plants
(50 CFR 17.12) is ultimately based on an
analysis of the best scientific and
commercial data then available to
determine whether a species meets the
definition of an endangered species or a
threatened species, regardless of
whether that information differs from
the recovery plan. Below, we summarize
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the recovery plan goals and discuss
progress toward meeting the recovery
objectives and how they inform our
analysis of the species’ status and the
stressors affecting it.
The Recovery Plan (USFWS2006, pp.
48–74) describes the recovery goal and
criteria that need to be achieved in order
to consider removing San Benito
evening-primrose from the Federal List
of Endangered and Threatened Plants.
We summarize the goal and then
discuss progress toward meeting the
recovery criteria in the following
sections.
Recovery Goal
In the Recovery Plan, the stated goal
is to restore occurrences of San Benito
evening-primrose so that they are selfsustaining and protected from future
threats (USFWS 2006, p. 51). This goal
is broadly evaluated through trends in
the observed numbers of individuals
indicated by annual monitoring, the
abundance and distribution of suitable
habitat, evaluation of the seed bank, and
the effectiveness of protective measures
that have been implemented to reduce
threats from human activities such as
mining, OHV use, and other recreational
activity (USFWS2006, pp. 51–52). In
order to evaluate threats to the species
we must consider potential impacts
within the foreseeable future. The
Recovery Plan (USFWS 2006, entire)
uses 20 years as the appropriate period
of time to evaluate population stability
because the number of individuals
fluctuates widely from year to year and
a longer monitoring time will better
reflect changes in trends despite this
variation (USFWS 2006, p. 51, 53).
Given this and information on potential
threats into the future, in this proposed
rule we have adopted 20 to 30 years as
the foreseeable future to evaluate
potential threats and the species’
responses to those threats.
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Recovery Criteria
The Recovery Plan identified five
criteria for removing San Benito
evening-primrose from the Federal List
of Endangered and Threatened Plants
(USFWS 2006, pp. 52–54):
(1) Research has evaluated the
possibility for restoration of suitable
habitat and the natural rate of the
replacement of suitable habitat (i.e.,
succession from open habitat to woody
vegetation), the ecology of the seedbank,
and population viability modeling. The
results of completed research, and any
other research that was conducted,
should inform all other recovery criteria
suggested by the Recovery Plan and are
listed below.
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(2) Known occurrences and sufficient
additional suitable habitat within each
watershed unit throughout its range are
protected from direct effects from OHV
use and other recreational activities.
Appropriate levels of compliance with
use regulations by recreationists have
prevented adverse impacts to San
Benito evening-primrose occurrences
and habitat.
(3) Currently occupied and suitable
habitat for the species has been restored
and maintained over an appropriate
period of time, as informed by
monitoring and research. Twenty years
was estimated as ‘‘the appropriate
period of time’’ in the Recovery Plan
(USFWS 2006, p. 53). The Recovery
Plan emphasizes maintaining suitable
habitat and more precisely defining the
requirements of suitable habitat.
Additionally, disturbance and erosion
rates should not be elevated above
natural levels and the seed bank should
be evaluated for continued persistence,
as above-ground numbers of individuals
are known to fluctuate widely from year
to year.
(4) Population sizes have been
maintained over a monitoring period
that includes multiple rainfall cycles
(successive periods of drought and wet
years). The Recovery Plan states that the
trend of above-ground counts of species
should be stable or increasing and
defines non-drought years as those with
greater than 15 in (38 cm) of rainfall
from October through April at the Priest
Valley weather station.
(5) A post-delisting monitoring plan
for San Benito evening-primrose has
been developed.
Achievement of Recovery Criteria
Criterion 1: Research has been
completed.
Research to increase the
understanding of the extent of existing
occurrences, the range of suitable
habitat, the persistence of the seed bank,
and analysis of the genetic variability
across watersheds and habitat types
have been undertaken since listing in
1985 (Taylor 1990, entire; BLM 2010,
entire; BLM 2014, entire; BLM 2015,
entire; BLM 2018, entire; Dick et al.
2014, entire).
Habitat Suitability. Research
conducted in 1990 (Taylor 1990, entire)
provided the first comprehensive
overview of the ecology of San Benito
evening-primrose that established the
initial understanding for the
requirements of suitable habitat for the
species, the species’ life history,
including early examination of the seed
bank and germination characteristics,
and the known distribution of the
species as well as threats to the known
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occurrences. From 1990 through 2010,
San Benito evening-primrose was
thought to be restricted to alluvial
terrace habitat that was characterized by
relatively deep and well-developed,
serpentine-derived soils on flat ground
(compared to nearby barren serpentine
slopes), association with ephemeral or
intermittent streams, and open habitat
lacking woody vegetation (Taylor 1990,
pp. 39–40). In 2010, the BLM identified
a second type of habitat, termed the
‘‘geologic transition zone,’’ that was
suitable for San Benito eveningprimrose (BLM 2010, pp. 8–16). The
geologic transition zone was
characterized by relatively steeper
slopes (0–∼60 degrees) of uplands on
serpentine soils at the interface with
non-serpentine soils. Geologic transition
zone habitat is not topographically
constrained to the toe of slopes, whereas
alluvial stream terrace habitat is. From
the time of listing through 2018, the
BLM conducted extensive surveys
within these habitat types, which led to
the discovery and documentation of
over 600 new point locations. The
results indicated that the majority of
both occupied and potential habitat is
greatest within the geologic transition
zone type (BLM 2018, p. 32). The new
sub-occurrences identified within the
geologic transition zone habitat are
relatively undisturbed in comparison to
the highly disturbed sites of the initial
locations known from alluvial stream
terraces (BLM 2010, p. 11). The majority
of new point locations are found outside
of the historical areas used by OHVs and
as a result have not been subjected to
the same levels of disturbance.
Approximately one-third to half of the
currently known occurrences exist on
private land outside of the Clear Creek
Management Area (table 2, table 3)
(BLM 2018, p. 33).
Seed Bank Analysis. Our
understanding of the role of the seed
bank in the life history of San Benito
evening-primrose has similarly
increased due to research efforts. The
number of viable seeds within the seed
bank was often many times greater than
the above-ground expression in any
given year—including those years in
which there was a large above-ground
expression (Taylor 1990, p. 57). The size
of the seed bank at existing locations
was reevaluated in 2010 by the BLM
(BLM 2011, pp. 36–42). The BLM found
that there were 519 times as many seeds
as emergent plants when averaged
across 67 sub-occurrences in 2010,
emphasizing that the size of the
seedbank is much greater than the total
number of observed individuals in a
given year. Maintaining a large amount
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of seed within the soil is a common
strategy for short-lived annuals in
habitats with frequent disturbance
because the persistent seed bank buffers
against stochastic environmental events
such as drought (Kalisz and McPeek
1993, pp. 319–320; Fischer and Matthies
1998, pp. 275–277; Adams et al. 2005,
p. 434). In species that develop large
seed banks, it is not uncommon to see
no above-ground expression one year
and to see a large expression the
following year, and this pattern has
been well-documented with San Benito
evening-primrose (BLM 2018, p. 11).
Disturbance Ecology. Frost heaving
(the expansion and contraction of water
within the soil during freeze-thaw
cycles), small mammal soil disturbance
(e.g., gopher burrowing), sediment
movement from adjacent slopes, and
erosion from stream flows were
identified as the primary sources of
natural disturbance experienced by San
Benito evening-primrose (Taylor 1990,
pp. 39–42, 57). Quantifiable measures of
erosion (natural or anthropogenic) and a
scale to measure disturbance severity
and persistence, as well as the
corresponding effect to San Benito
evening-primrose and associated
species, have not been developed. While
San Benito evening-primrose tolerates,
and is adapted to, disturbance from
natural processes, anthropogenic
disturbances from activities such as
mining, road and building construction,
and OHV use are much more severe and
may lead to loss of habitat through soil
removal, soil compaction, and increased
rates of erosion (BLM 2010, p. 29,
Snyder et al. 1976, pp. 29–30, Brooks
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and Lair 2005, p. 7, Groom et al. 2007,
pp. 130–131, Lovich and Bainbridge
1999, pp. 315–317, Switalski et al. 2017,
p. 88). Alluvial terrace habitat that was
greater than 50 percent disturbed from
OHV use was considered to be
unsuitable for San Benito eveningprimrose (Taylor 1990, p. 71; USFWS
2006, p. 13). Geologic transition zone
habitat was not considered here because
it had not yet been recognized as
suitable habitat, but tends to have less
OHV disturbance than alluvial terrace
habitat. The seed bank of San Benito
evening-primrose is very large, and the
amount of seed present is many times
greater than the amount of individuals
that germinate in any given year (Taylor
1990, p. 57, BLM 2011, pp. 33–42).
Additionally, the BLM found that the
majority of the existing seed bank is
found within the top 1 to 3 in (4 to 8
cm) of soil (BLM 2013, pp. 19–34). As
a result, any damage to, or loss of, the
top layer of soil has the potential to
negatively affect the ability of the
species to persist through time.
Recolonization. Natural rates of
recolonization of native flora in arid
environments following disturbance
have been estimated to be between 65–
76 years for a return to predisturbance
cover of annuals and perennials, and
from 148–215 (and greater) years for a
return to predisturbance species
composition and cover (Abella 2010, pp.
1,258–1,260, Berry et al. 2015, pp. 149–
150). Persistent OHV use reduced the
number of Astragalus magdalenae var.
peirsonii (Peirson’s milk-vetch) by 4–5
times the amount of comparable
undisturbed areas (Groom et al. 2006,
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pp. 126–127). The reduction in mature
individuals led to a decrease in the
amount of seeds produced and
suggested that persistent impacts from
OHVs over extended periods of time
may result in the depletion of the
existing seedbank (Groom et al. 2006,
pp. 131–132). We can use this
information as an indicator of how San
Benito evening-primrose recolonization
may be similarly affected by OHV.
The Recovery Plan recommends target
numbers of individuals for a sub-set (27)
of the known occurrences of San Benito
evening-primrose (USFWS 2006, pp.
56–58). These occurrences also
generally have the longest record of
survey data and include the initial
occurrences described in Taylor (1990,
entire). Data from the BLM indicate that,
despite cessation of OHV use in 2008,
the number of individuals observed
annually at these occurrences has not
increased and may be decreasing (figure
2). The 5-year moving average indicates
a decrease in the average number of
individuals from 1988 through 1993
followed by stable to slightly increasing
numbers of individuals. However, 1988
was an abnormal year, and the number
of individuals counted during surveys
was significantly greater than any other
recorded year. The abnormally high
numbers of individuals identified that
year have a large effect on the observed
trend in annual number of individuals.
These data are consistent with available
literature that suggests that a return to
predisturbance conditions likely occurs
on time scales of greater than 65–76
years and possibly even greater than 150
years.
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Population Genetics. The occurrences
of San Benito evening-primrose that the
BLM began finding within geologic
transition zone habitat were at first
thought to be genetically distinct from
occurrences within alluvial terrace
habitat. The new occurrences were also
located within different watersheds
from the first known occurrences, and
there was some question as to whether
or not the species may be hybridizing
with a close relative, Camissonia
strigulosa (contorted primrose). If the
occurrences were genetically distinct,
recovery actions, such as restoration of
degraded habitat and out-planting
efforts, would need to be identified for
each habitat type. There were three
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distinct genetic clusters of San Benito
evening-primrose found but none of the
genetic clusters coincided with type of
habitat or watershed (Dick et al. 2014,
entire). Additionally, the same study
found no evidence of hybridization
between San Benito evening-primrose
and contorted primrose. Because the
genetic diversity identified within the
occurrences was widespread and
uncorrelated with habitat and
watershed, future out-planting efforts
would not need to be restricted to
genetic type. The study instead
concluded that seed from different
occurrences should be mixed to increase
diversity across the entire geographic
range. In summary, research to increase
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33067
the understanding of the extent of
existing occurrences, the range of
suitable habitat, the persistence of the
seed bank, and analysis of the genetic
variability across watersheds and
habitat types have been undertaken
fulfilling recovery criterion 1.
Criterion 2: Known occurrences and
sufficient additional suitable habitat
within each watershed unit throughout
its range are protected from direct
effects from OHV use and other
recreational activities.
Wire fencing, steel pipe barriers,
signage, and enforcement of trail
restrictions were used to protect San
Benito evening-primrose and suitable
habitat prior to the 2006 amendment to
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the Resource Management Plan. The
2006 amendment to the Resource
Management Plan closed to OHVs all
areas not marked for limited or open
use. This restricted the total OHV use
area to 242 miles (390 km) of OHV trails
and directed OHV use away from areas
that provided suitable habitat for, or
were occupied by, San Benito eveningprimrose (BLM 2006 p. 3–1). By 2009,
non-compliance with the 2006 Resource
Management Plan had declined (BLM
2008, pp. 5–9; USFWS 2009, pp. 19–21).
In 2008, the EPA issued a report
concluding that exposure to naturally
occurring asbestos during recreational
activities, including OHV use, was
higher than the acceptable risk range for
causing cancer within the CCMA (EPA
2008, p. 6–3). The level of exposure to
asbestos varied with recreational
activity and participant age, but was
significant enough to warrant an
emergency temporary closure of the
CCMA (BLM 2008, p. 2). Although not
the intent, the closure effectively
temporarily protected all known
occurrences of San Benito eveningprimrose from OHV disturbance. The
temporary closure remained in place
until the 2014 amendment to the
Resource Management Plan was
adopted (BLM 2014, entire). The 2014
Resource Management Plan further
restricted OHV access to areas of
suitable habitat and known suboccurrences of San Benito eveningprimrose by reducing the amount of
open trails and restricting access to the
Serpentine Area of Critical
Environmental Concern (ACEC) to 5
days per year per recreationalist through
a permit system and a series of locked
gates (BLM 2014, pp. 1–18).
The BLM has conducted OHV noncompliance monitoring as part of the
annual San Benito evening-primrose
surveys since 2008 and the initial
closure of the Serpentine ACEC (table
2). During this time non-compliance has
remained relatively low with the
number of point locations or potential
habitat being impacted by OHV ranging
from 2 to 11 locations in a given year.
The amount of disturbance within each
area has been observed to be low, and
natural recovery was observed. Upper
Clear Creek, Larious Canyon, and San
Carlos Creek are areas of repeated noncompliance despite annual repairing of
fencing and barriers and issuance of
citations for violating the closures when
users are caught (BLM 2013, p. 5, BLM
2015, p. 6). The intensity of noncompliance varied from heavy (greater
than 10 tracks observed) to moderate or
low (less than 10 tracks observed). The
BLM assumes that non-compliant OHV
use originates from private land
adjacent to the CCMA.
TABLE 2—SUMMARY OF OFF-HIGHWAY VEHICLE NON-COMPLIANCE WITHIN THE SERPENTINE AREA OF CRITICAL
ENVIRONMENTAL CONCERN 2008 THROUGH 2016
Number of point
locations
with observed
non-compliance
Year *
2008
2009
2010
2012
2013
2014
2015
2016
................
................
................
................
................
................
................
................
Minimum number
of tracks
6
3
2
11
10
9
8
6
Max number of
tracks
NA
NA
2
1
1
1
1
1
Average number
of tracks
NA
NA
10+
10+
10+
10+
10+
10+
NA
NA
2
7
8
5
7
8
Reference
BLM
BLM
BLM
BLM
BLM
BLM
BLM
BLM
2008
2010
2011
2012
2013
2015
2017
2017
pp. 8–9.
p. 5.
pp. 12–13.
p. 5.
p. 5.
p. 6.
pp. 6–7.
p. 8.
* No data available for 2011, 2017, 2018. Minimum, maximum, and average number of tracks observed were not available for the 2008 and
2009 survey seasons.
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By 2014, the number of known point
locations of San Benito eveningprimrose had grown to 500 with the
majority occurring within the geologic
transition zone habitat. Approximately
half of those locations were protected
from OHV use due to the restrictions
imposed by the 2014 Resource
Management Plan (BLM 2014, pp. 1–18;
BLM 2015, pp. 7–16). By 2018, 658
point locations of San Benito eveningprimrose had been mapped by the BLM
(BLM 2018, pp. 32–47). The 658 point
locations correspond to 79 occurrences
consisting of 519 sub-occurrences and
covering 63.2 acres (25.6 ha) (table 1,
figure 1). Twenty-three occurrences (81
sub-occurrences) are located within the
Serpentine ACEC and are effectively
protected from OHV use due to the 2014
Resource Management Plan (BLM 2018,
p. 33) (table 3). There are 36 occurrences
(260 sub-occurrences) within BLMmanaged land outside of the Serpentine
ACEC. OHV use within the CCMA, but
outside of the Serpentine ACEC, has
been designated as ‘‘limited,’’ meaning
that motorized use is restricted to
highway-licensed vehicles and ATVs
and utility task vehicles on designated
routes only (BLM 2014, pp. 1–13
through 1–14). Forty-five occurrences
(178 sub-occurrences) are known to
occur on private land that are not
subject to management by the BLM or
other Federal agencies (table 3, table 4).
When the recovery plan criteria were
written, there were 27 known
occurrences. Twenty- three of those
occurrences were on land managed by
the BLM, and four were on private
property. Currently, there are 59
occurrences on BLM-managed land and
45 occurrences on private property.
Although protections for the
occurrences on private land cannot be
guaranteed, the number of occurrences
on land managed by the BLM has
exceeded the goal of Recovery Criterion
2 through discovery of new occurrences.
TABLE 3—NUMBER OF OCCURRENCES, SUB-OCCURRENCES, AND ACREAGE OF MAPPED SAN BENITO EVENING-PRIMROSE
(Camissonia benitensis) LOCATIONS BY LAND MANAGER (2018)
Number of
occurrences
BLM ............................................................................................................................
ACEC .........................................................................................................................
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Number of
sub-occurrences
36
23
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TABLE 3—NUMBER OF OCCURRENCES, SUB-OCCURRENCES, AND ACREAGE OF MAPPED SAN BENITO EVENING-PRIMROSE
(Camissonia benitensis) LOCATIONS BY LAND MANAGER (2018)—Continued
Number of
occurrences
Private ........................................................................................................................
Number of
sub-occurrences
45
Acres
178
26.6
Occurrences consist of sub-occurrences (mapped polygons) within 0.25 mile of each other. Point locations are reported in the 2018 Annual
Report (BLM 2018 p. 32). Acreage data are derived from the spatial extent of the mapped occurrences. Note that occurrences that encompass
multiple property owners may be counted twice because of how the mapped data are nested.
The majority of the known
occurrences and sub-occurrences occur
within the geologic transition zone
identified by the BLM as habitat in 2010
(table 4). Occurrences of San Benito
evening-primrose within geologic
transition zone habitat are assumed to
be less likely to be affected by OHV
recreation since OHV riders have
historically preferred the terrain
associated with alluvial terrace habitat
(BLM 2010, p. 11). In summary, known
occurrences and sufficient additional
suitable habitat within each watershed
unit throughout its range are protected
from direct effects from OHV use and
other recreational activities, fulfilling
recovery criterion 2.
TABLE 4—NUMBER OF KNOWN OCCURRENCES AND SUB-OCCURRENCES BY LAND MANAGER AND HABITAT TYPE
Alluvial terrace habitat
Number of
occurrences
Number of
sub-occurrences
Geologic transition zone habitat
Number of
occurrences
Acres
Number of
sub-occurrences
Acres
BLM ..............................................
ACEC ...........................................
Private ..........................................
17
6
10
104
37
26
6.7
3.0
0.6
19
17
35
156
44
152
17.2
9.7
26.0
Total ......................................
33
167
10.3
71
352
53.0
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Occurrences consist of sub-occurrences (mapped polygons) within 0.25 mile of each other. Point locations are reported in the 2018 Annual
Report (BLM 2018 p. 32). Acreage data are derived from the spatial extent of the mapped occurrences. Note that occurrences that encompass
multiple property owners may be counted twice because of how the mapped data are nested.
Criterion 3: Currently occupied and
suitable habitat for the species has been
restored and maintained over an
appropriate period of time, as informed
by monitoring and research.
In the Recovery Plan, 20 years was
identified as the appropriate period of
time to conduct and evaluate the
success of restoration activities. Twenty
years was chosen to allow enough time
for observations of natural and restored
occurrences during non-drought years to
be made in order to evaluate the
stability of San Benito evening-primrose
occurrences (USFWS 2006, pp. 53–54).
Thirty-three years have passed since
San Benito evening-primrose was listed
by the Service as a threatened species.
Restoration began prior to listing by
using fencing to discourage disturbance
by OHVs (Taylor 1990, pp. 24–36, 71).
The BLM has continued to implement
passive restoration measures such as
installation of additional wire fencing
and steel pipe barriers to reduce OHV
trespass and signage to promote
awareness of the natural resources (BLM
2018 pp. 50–56). Photopoint monitoring
has demonstrated an increase in the
amount of woody vegetation cover in
previously open and disturbed areas.
The increase in woody vegetation cover
suggests that fencing and other barriers
have been effective in reducing ground
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disturbance from OHV use prior to the
temporary closure in 2008 and the
permanent restrictions in 2014.
Seed of San Benito evening-primrose
was introduced between 1990 and 1991
at six areas near existing point locations.
At five of the reintroduction sites,
30,000 seeds were broadcast into areas
that were each 2,153 ft2 (200–300 m2) in
area. Sixty thousand seeds were
broadcast into the sixth site (BLM 2013,
Excel data, Taylor 1993, p. 14). Very few
plants, relative to the amount of seed
reintroduced, were observed (between 3
and 147 plants) in the years
immediately following the seeding. It
has been determined that San Benito
evening-primrose establishment from
artificially sown seed is very low and
that seeding introduction is not likely to
be a successful restoration tool (Taylor
1993, p. 14). The areas where seed was
introduced have continued to have
small numbers of individuals observed
each year. Approximately 3,000 seeds
were sown in 2008 and 2012 in areas
where San Benito evening-primrose had
not been observed but where potential
habitat existed that could support new
occurrences. The number of individuals
at these areas have remained similarly
low ranging from 0 to 320 individuals
in a single year (BLM 2018, pp. 34–47).
Restoration of five staging areas
located on stream terraces that were
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heavily degraded from OHV use and
mining (prior to 1939) was completed in
2010 (BLM 2011, pp. 4–10). The staging
areas were characterized by a mix of
lack of vegetation, soil compaction,
buried original soil surface, debris from
facilities, and erosion on adjacent
hillslopes. A total of 2.01 ac (0.81 ha) of
San Benito evening-primrose habitat
was restored. Annual counts of San
Benito evening-primrose at each of the
staging areas and associated suboccurrences have indicated that the
number of individuals in any given year
fluctuates greatly (BLM 2018, pp. 34–
47). Staging areas 1, 4, and 5 have
relatively stable annual counts, while
staging areas 2 and 3 have had more
variable, and possibly slightly declining,
annual counts.
The BLM has also undertaken efforts
to improve watershed quality by
identifying the most appropriate species
and methods to restore streambanks
(BLM 2011, pp. 10–12). While the
immediate stream banks are not suitable
habitat for San Benito evening-primrose,
restoring natural hydrology and
maintaining bank composition can
reduce sedimentation and erosion in the
watershed that indirectly supports the
persistence of San Benito eveningprimrose habitat. The BLM found that
revegetation of degraded streambanks
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using sod of Agrostis exarata (spike
bentgrass) was most effective.
Additionally, six vehicle routes were
closed and restored by removing access
and ripping the compacted soil (BLM
2011 p. 10). In summary, currently
occupied and suitable habitat for the
species has been restored and
maintained over an appropriate period
of time, as informed by monitoring and
research, fulfilling recovery criterion 3.
Criterion 4: Population sizes have
been maintained over a monitoring
period that includes multiple rainfall
cycles (successive periods of drought
and wet years).
The Recovery Plan recommended a
target average number of individuals for
27 occurrences of San Benito eveningprimrose (USFWS 2006, pp. 54–58;
BLM 2018, pp. 34–35). The target counts
were based on past observations of the
number of individuals observed during
favorable years and were considered to
be approximate. Four of the 27 locations
with a target number of individuals had
an average annual count that met or
exceeded the target levels between 1983
and 2017 (USFWS 2006, pp. 56–58;
BLM 2018, pp. 34–35; USFWS Review
of BLM reporting data). Five of the 27
locations had an annual average count
that met or exceeded the target number
of individuals when only years with
normal precipitation are considered. We
consider the average number of
individuals because the number of
individuals at any given site fluctuate
greatly from year to year causing single
year counts to be inaccurate measures of
the stability of the species (figure 2).
The total annual number of
individuals for the same 27 sites has
fluctuated around a mean of
approximately 9,600 individuals since
1983 (Figure 2). Over time, a slight
decrease in the species count is
observable, but is small enough to be
affected by a single year’s count. The
slight negative trend is due to a
significantly above-average year in 1988
where the total number of individuals
observed was an order of magnitude
greater than during any other annual
count. The 5-year moving average
indicates a decrease in the average
number of individuals from 1988
through 1993, followed by stable to
slightly increasing numbers of
individuals. We also recognize that only
those occurrences that were known by
2006, and had suggested target numbers
of individuals, are represented in the 27
locations. This does not take into
consideration the majority of currently
known occurrences. Evaluating the
trend of each of the 79 occurrences (658
point locations, see table 1) is not
feasible because census data for the
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entirety of known point locations are
not available.
The target number of individuals has
not been met for 23 of the 27
occurrences with target criteria.
However, the target numbers were
estimates and the lack of a consistent
decline in mean annual counts suggest
that, while the occurrences are not
increasing in abundance of San Benito
evening-primrose, they are not
threatened with extinction. The lack of
decline in number of individuals over a
27-year monitoring period and an
increase in the number of known
occurrences indicate that the criteria of
maintaining population numbers over
an appropriate period of time has been
met.
Criterion 5: A post-delisting
monitoring plan for the species has been
developed.
Section 4(g)(1) of the Act requires us,
in cooperation with the States, to
implement a system to monitor
effectively, for not less than 5 years, all
species that have been recovered and
delisted (50 CFR 17.11, 17.12). The
purpose of this post-delisting
monitoring is to verify that a species
remains secure from risk of extinction
after it has been removed from the
protections of the Act. The monitoring
is designed to detect the failure of any
delisted species to sustain itself without
the protective measures provided by the
Act. If, at any time during the
monitoring period, data indicate that
protective status under the Act should
be reinstated, we can initiate listing
procedures, including, if appropriate,
emergency listing under section 4(b)(7)
of the Act. Section 4(g) of the Act
explicitly requires us to cooperate with
the States in development and
implementation of post-delisting
monitoring programs, but we remain
responsible for compliance with section
4(g) and, therefore, must remain actively
engaged in all phases of post-delisting
monitoring. We also seek active
participation of other entities that are
expected to assume responsibilities for
the species’ conservation post delisting.
Post-delisting Monitoring Guidelines.
Post-delisting monitoring is designed to
verify that San Benito evening-primrose
remains secure from risk of extinction
after delisting by detecting changes in
trend that indicate that the known
occurrences have become unstable and/
or are at risk of becoming once again
threatened or endangered. The Act has
a minimum post-delisting monitoring
requirement of 5 years, but a longer
period of time may be necessary to
account for fluctuations in counts from
year to year, potential changes in land
use, and climatic variability. If a decline
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in abundance or a substantial new threat
arises, post-delisting monitoring may be
extended or modified and the status of
the species will be reevaluated. The
Service is responsible for establishing a
final post-delisting monitoring plan. As
the sole Federal entity that manages
land where San Benito eveningprimrose occurs, the BLM will
contribute expertise for development
and implementation of the final postdelisting monitoring plan. The draft
post-delisting monitoring plan can be
found at https://www.regulations.gov in
Docket No. FWS–R8–ES–2019–0065.
The Service intends to work with the
BLM to finalize the post-delisting
monitoring plan upon publication of
this proposed rule.
Summary of Recovery Criteria
Research and survey efforts have
clarified the distribution, extent, and
habitat characteristics of San Benito
evening-primrose. The seed bank has
been demonstrated to be prolific and an
integral part of the species’ ecology in
responding to, and persisting through,
negative stochastic events. A genetic
evaluation of the newly identified suboccurrences have shown that there is no
genetic distinction based upon habitat
type or watershed among the different
sub-occurrences. Existing research has
resulted in a better understanding of the
species’ ecology and has shown an
increase in the species’ range, suitable
habitat, and number of occurrences.
With the currently completed research,
the intent of the first recovery criteria
has been met.
The second recovery criteria has been
achieved through the 2014 Resource
Management Plan, which restricted
OHV access to areas of suitable habitat
and known sub-occurrences of San
Benito evening-primrose by reducing
the amount of open trails and restricting
access to the Serpentine ACEC to 5 days
per year per recreationalist through a
permit system and a series of locked
gates (BLM 2014, pp. 1–18). The
identification of a new habitat type, the
geologic transition zone, and numerous
new point locations have increased the
known range and amount of known
occupied habitat. The topography and
composition of geologic transition zone
habitat is not typical of areas preferred
by OHV users, and many of the new
occurrences of San Benito eveningprimrose were not subject to OHV
disturbance. As a result, the majority of
the currently known occurrences of San
Benito evening-primrose have not been
disturbed from OHV use. The existing
Resource Management Plan (BLM 2014,
entire) will continue to provide
protection for San Benito evening-
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primrose occurrences within the
Serpentine ACEC and the CCMA
through trail restrictions and a
permitting system. The Post-delisting
Monitoring Plan will provide guidelines
for evaluating the species following
delisting to detect substantial declines
that may lead to consideration of
reclassification to threatened or
endangered. Changes in land use will
still be subject to State and Federal
environmental review.
Annual monitoring of 27 locations of
San Benito evening-primrose listed in
the Recovery Plan have shown that
numbers of individuals at historically
occupied habitat have remained
relatively stable. Active and passive
restoration efforts undertaken by the
BLM, in conjunction with the closure of
the Serpentine ACEC to OHV use, have
improved degraded areas into suitable
habitat for San Benito evening-primrose.
The reduction in OHV use described in
the 2014 Resource Management Plan
provided protection of occupied habitat
within the CCMA, and continued
prohibition on OHV use will ensure that
future degradation of occupied habitat
will not occur within the CCMA. The
Recovery Plan suggested target numbers
of individuals that could be used as a
point of reference to assess the stability
of San Benito evening-primrose. Those
goals have been met for four (five if only
normal precipitation years are
considered) of the 27 locations that are
listed in the Recovery Plan. Those
values were considered an
approximation, and it appears that the
27 locations listed in the Recovery Plan
have remained relatively stable around
a 5-year moving average when the
abnormally high-count year (1988) is
considered (figure 2). Furthermore, the
27 locations are no longer representative
of the entire range of San Benito
evening-primrose due to the discovery
of the geologic transition zone as
suitable habitat and the associated
increase in the known total number of
individuals and occupied acreage.
Therefore, we conclude that based on
the best available information, the
recovery criteria in the Recovery Plan
have been achieved and the recovery
goal identified in the Recovery Plan has
been met for San Benito eveningprimrose. Recovery criterion 1 has been
met with research to increase the
understanding of the extent of existing
occurrences, the range of suitable
habitat, the persistence of the seed bank,
and analysis of the genetic variability
across watersheds and habitat types.
Recovery criterion 2 has been met with
protection of known occurrences and
sufficient additional suitable habitat
within each watershed unit throughout
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its range. Recovery criteria three and
four have been met through the closure
of the Serpentine ACEC, restoration of
degraded areas, and observed stability of
27 of the 79 occurrences over a period
that included 18 years of normal rainfall
over a 27-year period. Recovery
criterion 5 has been met through the
development of a draft post-delisting
monitoring plan for the species, which
will be finalized in collaboration with
the BLM.
Regulatory and Analytical Framework
Regulatory Framework
Section 4 of the Act (16 U.S.C. 1533)
and its implementing regulations (50
CFR part 424) set forth the procedures
for determining whether a species is an
‘‘endangered species’’ or a ‘‘threatened
species.’’ The Act defines an
endangered species as a species that is
‘‘in danger of extinction throughout all
or a significant portion of its range,’’ and
a threatened species as a species that is
‘‘likely to become an endangered
species within the foreseeable future
throughout all or a significant portion of
its range.’’ The Act requires that we
determine whether any species is an
‘‘endangered species’’ or a ‘‘threatened
species’’ because of any of the following
factors:
(A) The present or threatened
destruction, modification, or
curtailment of its habitat or range;
(B) Overutilization for commercial,
recreational, scientific, or educational
purposes;
(C) Disease or predation;
(D) The inadequacy of existing
regulatory mechanisms; or
(E) Other natural or manmade factors
affecting its continued existence.
These factors represent broad
categories of natural or human-caused
actions or conditions that could have an
effect on a species’ continued existence.
In evaluating these actions and
conditions, we look for those that may
have a negative effect on individuals of
the species, as well as other actions or
conditions that may ameliorate any
negative effects or may have positive
effects.
We use the term ‘‘threat’’ to refer in
general to actions or conditions that are
known to or are reasonably likely to
negatively affect individuals of a
species. The term ‘‘threat’’ includes
actions or conditions that have a direct
impact on individuals (direct impacts),
as well as those that affect individuals
through alteration of their habitat or
required resources (stressors). The term
‘‘threat’’ may encompass—either
together or separately—the source of the
action or condition or the action or
condition itself.
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However, the mere identification of
any threat(s) does not necessarily mean
that the species meets the statutory
definition of an ‘‘endangered species’’ or
a ‘‘threatened species.’’ In determining
whether a species meets either
definition, we must evaluate all
identified threats by considering the
expected response by the species, and
the effects of the threats—in light of
those actions and conditions that will
ameliorate the threats—on an
individual, population, and species
level. We evaluate each threat and its
expected effects on the species, then
analyze the cumulative effect of all of
the threats on the species as a whole.
We also consider the cumulative effect
of the threats in light of those actions
and conditions that will have positive
effects on the species, such as any
existing regulatory mechanisms or
conservation efforts. The Secretary
determines whether the species meets
the definition of an ‘‘endangered
species’’ or a ‘‘threatened species’’ only
after conducting this cumulative
analysis and describing the expected
effect on the species now and in the
foreseeable future.
The Act does not define the term
‘‘foreseeable future,’’ which appears in
the statutory definition of ‘‘threatened
species.’’ Our implementing regulations
at 50 CFR 424.11(d) set forth a
framework for evaluating the foreseeable
future on a case-by-case basis. The term
‘‘foreseeable future’’ extends only so far
into the future as the Services can
reasonably determine that both the
future threats and the species’ responses
to those threats are likely. In other
words, the foreseeable future is the
period of time in which we can make
reliable predictions. ‘‘Reliable’’ does not
mean ‘‘certain’’; it means sufficient to
provide a reasonable degree of
confidence in the prediction. Thus, a
prediction is reliable if it is reasonable
to depend on it when making decisions.
It is not always possible or necessary
to define foreseeable future as a
particular number of years. Analysis of
the foreseeable future uses the best
scientific and commercial data available
and should consider the timeframes
applicable to the relevant threats and to
the species’ likely responses to those
threats in view of its life-history
characteristics. Data that are typically
relevant to assessing the species’
biological response include speciesspecific factors such as lifespan,
reproductive rates or productivity,
certain behaviors, and other
demographic factors.
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Analytical Framework
The 5-year review documents the
results of our comprehensive biological
status review for the species, including
an assessment of the potential threats to
the species. The review provides the
scientific basis that informs our
regulatory decisions, which involve the
further application of standards within
the Act and its implementing
regulations and policies. The 5-year
review can be found at https://
www.regulations.gov under Docket
FWS–R8–ES–2019–0065. Where
information in the 5-year review is out
of date, we have provided updated
information in this proposed rule.
Summary of Biological Status and
Threats
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Historical analyses and discussion of
the threats to San Benito eveningprimrose are detailed in the Recovery
Plan (USFWS 2006, pp. 26–36) and 5Year Review (USFWS 2009, pp. 10–18).
An updated analysis and discussion
follows here. Primary threats to San
Benito evening-primrose identified in
the listing rule included OHV use of
occupied and potential habitat and
gravel mining. Uncertainty about the
reproductive capacity of the species and
vandalism were also considered
additional threats at listing. Vandalism
was considered a threat due to the small
population size and public resistance to
listing the species under the Act. The
resistance came from the OHV
community perception that listing the
species would inhibit their ability to
continue recreating. However,
vandalism was not believed to be
significant with subsequent reviews of
the species in the Recovery Plan and 5Year Review and is not considered
further in this proposed rule. Since
listing, the Recovery Plan and 5-Year
Review identified as additional threats:
Soil loss and elevated erosion rates from
OHV trails and staging areas, camping,
facilities construction and maintenance,
habitat alteration due to invasive
species and/or natural vegetation
community succession, climate change
and the local effect on precipitation
patterns and temperature, and stochastic
events. The following sections provide a
summary of the past, current, and
potential future threats relating to San
Benito evening-primrose.
Off-Highway Vehicle Use
Off-highway vehicle use of open
serpentine barrens and alluvial terraces
was considered the primary threat to
San Benito evening-primrose when it
was listed in 1985. Soil disturbance
from OHVs use increased soil loss, soil
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compaction, and could result in the
physical removal of plants. Staging
areas and camping associated with OHV
use had similar negative impacts to the
species and its habitat. Between 1985
and 2010, the BLM implemented a
series of measures to reduce effects to
known habitat and occurrences of San
Benito evening-primrose through
fencing of sensitive areas, signage,
designation of specific open riding
areas, and enforcement and
management of designated OHV trails.
In 2005, the BLM estimated 50,000
visitor-use days per year occurred
within the CCMA (USFWS 2006, p. 27).
OHV use decreased in 2008 following
the release of an EPA report that found
high levels of naturally occurring
asbestos that posed a significant health
risk to visitors within the Serpentine
ACEC.
To address the EPA findings, the BLM
issued new Management Plans and
associated Records of Decision in 2014,
which restricted OHV access to areas of
suitable habitat and known suboccurrences of San Benito eveningprimrose by reducing the amount of
open trails and restricting access to the
Serpentine ACEC to 5 days per year per
recreationalist through a permit system
and a series of locked gates (BLM 2014,
pp. 1–18). Currently, only highwaylicensed vehicles are allowed within the
Serpentine ACEC on designated roads
and by permit, which is limited to five
use-days per year per person. These
restrictions on OHV use have effectively
removed OHV impacts to San Benito
evening-primrose. OHV non-compliance
with fencing and trail restrictions has
been monitored within lands managed
by the BLM. Findings of noncompliance remain low compared to
levels of use prior to closure (table 2).
Occurrences located on private property
are not protected from OHV use, and
occurrences on BLM land near private
land are at greater risk of disturbance
from OHV trespass. Under the current
Resource Management Plan (BLM 2014,
entire), because of its implementation of
closures and restrictions, we do not
consider OHV use will become a threat
to occurrences on BLM land in the
foreseeable future. While BLM
restrictions do not provide protection to
occurrences on private land, the best
available data on historical and current
recreation levels do not indicate that the
level of OHV use on private land will
increase from current levels to levels
that would threaten the persistence of
the species in the foreseeable future.
Mining
The last commercial mining in the
CCMA ceased extraction activities in
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2002 (BLM 2018, p. 66). The BLM has
acquired surface rights to 208 ha (520
ac) along the lower reaches of Clear
Creek up to and including the
confluence with the San Benito River.
This acquisition protects habitat and
occurrences of San Benito eveningprimrose, but without having the
mineral rights to the land, it cannot be
considered fully under the control of the
BLM (USFWS 2009, p. 13). The BLM
decided in the 2014 Resource
Management Plan that no mineral
leasing or sales on public lands will
occur within the Serpentine ACEC and
that mineral leasing and sales on public
lands outside of the Serpentine ACEC
will have ‘‘no surface occupancy’’
stipulations where occupied special
status species habitat occurs (BLM 2018,
pp. 1–36 through 1–37). With these
requirements, and no active mining
leases within suitable habitat and
known occurrences, we conclude that
mining is no longer a significant threat
to San Benito evening-primrose and is
not likely to become a threat in the
foreseeable future
Rock hounding (hobby of collecting
rock and mineral specimens from the
natural environment) within the CCMA
persists as a recreation activity,
although quantifying the amount and
effect of rock hounding on San Benito
evening-primrose is lacking. However,
given the restricted vehicle access and
relatively low impact of an individual
user versus a commercial mining
operation, we consider that effects to
San Benito evening-primrose from rock
hounding are negligible and are not
likely to become a threat in the
foreseeable future.
Soil Loss and Elevated Erosion Rates
Soil loss and erosion may occur
naturally due to seasonal disturbances
as would be expected by frost heaving,
overland sheet flow from precipitation,
unconsolidated soil, sparse vegetation,
and flood events. These natural
disturbances promote areas relatively
free of dense vegetation, increase water
infiltration, and may aid in dispersal of
the San Benito evening-primrose
downstream or downslope from existing
occurrences. Many of the threats
presented under Factor A may be
considered a ‘‘disturbance’’ to the
habitat of the species, but this does not
mean that they are beneficial. For
example, the effects to soil from frost
heaving and overland sheet flow are
very different from those resulting from
repeated use of OHVs. The BLM
attempted to quantify the differences
between the natural, or background,
rates of soil loss and erosion, and those
that result from OHV and highway
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vehicle use. The mean background soil
loss in the Clear Creek Watershed was
8 yards3 (yd3)/ac-year (11 tons/ac-year)
and that soil loss resulting from OHV
open riding resulted in soil loss of 12
yd3/ac-year (16 tons/ac-year) (PTI
Environmental 1993, pp. 36–39). The
erosion rate from roads was estimated at
59 yd3/ac-year (80 tons/ac-year).
Increased erosion and elevated soil
loss are indicative of loss of suitable
habitat. The seed bank may be lost as
soil erodes and the remaining soil may
become compacted, decreasing
germination potential as well as water
retention. Trails that form from repeated
use on open slopes or terraces may
collect and funnel water, creating
runnels, which in turn increase erosion
while drawing water away from
adjacent areas (Brooks and Lair 2005, p.
7; Ouren et al. 2007, pp. 5–16). The
BLM has recognized this issue and has
attempted to enact minimization
measures for soil loss and erosion. In
the most recent Resource Management
Plan, the BLM includes guidelines that
call for road closures during extreme
wet weather, prioritizing closed roads
for restoration and reclamation, and
establishing automated weather stations
to monitor precipitation and soil
moisture and requires approved erosion
control strategies to be evaluated for any
soil-disturbing activities on slopes of
20–40 percent (BLM 2014, p. 1–30).
Presently, the threat of soil loss and
erosion is limited to natural cycles,
remnant effects of past land use, and
roads (for which the above
minimization measures apply).
Considering that additional suboccurrences of San Benito eveningprimrose continue to be identified and
persist within habitat that is more prone
to erosion (upland slopes of the geologic
transition zone habitat type), it is
unlikely that natural rates of soil loss
and erosion present a threat to the
continued existence of the species and
is not likely to do so in the foreseeable
future.
Facilities Construction and
Maintenance
The construction of the BLM Section
8 Administrative Site in 1988 and
associated structures resulted in direct
loss of San Benito evening-primrose and
its habitat, although the species still
occurs in the vicinity of the disturbance
(USFWS 2009, pp. 12–13, BLM 2018, p.
34). The Section 8 Administrative Site
was decommissioned in 2010 and
replaced by the Clear Creek
Administrative Site. The new
administrative site was not constructed
on occupied or potential habitat for San
Benito evening-primrose, although the
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impacts resulting from the original
disturbance remain (BLM 2018, p. 66).
The old Section 8 Administrative Site is
infrequently used and, at current levels
of use, does not present a threat to the
persistence of San Benito eveningprimrose due to the discovery of new
sub-occurrences and potential habitat
throughout the CCMA (BLM 2018 p. 66).
No new facilities and construction
projects are planned, and it is not likely
that new projects in occupied or
potential habitat will be proposed in the
foreseeable future.
Habitat Alteration Due to Invasive
Species
The serpentine-derived soils inhibit
invasion from nonnative plant species
where San Benito evening-primrose
occurs. However, the habitat may still
be degraded if invasion by nonnative
species is allowed to occur on adjacent
land. High densities of nonnative
species may negatively influence
existing or potential habitat for San
Benito evening-primrose by providing a
persistent threat of colonization. Yellow
star thistle (Centaurea solstitialis) and
tocalote (C. melitensis) have been
actively controlled near occurrences of
San Benito evening-primrose within the
CCMA since 2005 (BLM 2018, p. 62).
The BLM has identified prescribed fire
followed by broadcast application of
clopyralid, a broadleaf specific
herbicide, as the most effective means of
reducing the cover of invasive species
threatening San Benito eveningprimrose. The cover of yellow star
thistle has been reduced by 95 percent
in the Clear Creek drainage, and San
Benito evening-primrose has expanded
into the improved habitat (BLM 2018, p.
62). The natural buffer that the
serpentine-derived soils provide,
coupled with BLM’s management of
invasive species and the expansion of
known sub-occurrences and potential
habitat, make it unlikely that invasive
species present a significant threat
either now or into the future to the
persistence of San Benito eveningprimrose. The abundance of invasive
species will be monitored as part of the
Post-delisting Monitoring Plan. The
Post-delisting Monitoring Plan will
suggest thresholds that will determine
the necessary control efforts on federally
managed land.
Succession to Woody Shrub Community
San Benito evening-primrose habitat
is typically open and relatively free of
high amounts of woody vegetation and
canopy cover. Succession to a woody
shrub community in habitat that
presently or historically supported San
Benito evening-primrose could result in
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increased canopy cover (potentially
shading out San Benito eveningprimrose) and increased competition for
resources (lessening the success of
establishment and survival) (Taylor
1990, p. 66). Photopoints initiated by
the BLM in 1980 suggest that open
serpentine barrens are less susceptible
to encroachment by woody shrubs
(typically chaparral species such as
manzanita (Arctostaphylos spp.)) than
alluvial terrace habitat. This is
presumably due to the greater
concentration of serpentine soils on the
open barrens compared to the more
organic rich soils of the alluvial terraces.
Continued evidence of encroachment
into areas occupied by San Benito
evening-primrose has been observed at
established photomonitoring points
(BLM 2018, pp. 56–57).
The immediate effect of encroachment
by woody vegetation would be to
reduce, or possibly eliminate, known
occurrences and potential habitat of San
Benito evening-primrose through
competition and alteration of habitat
structure. It is possible that the seed
bank, once established, is long lived
enough that it may persist through
cycles of vegetation community shifts
due to natural events such as fires.
However, the species has not been
studied for sufficient time to observe the
effects of vegetation succession. The
BLM has estimated that seed may
remain viable for 107 years in the
presence of common co-occurring
shrubs (BLM 2015, pp. 16–28).
San Benito evening-primrose has not
been observed in the geologic transition
zone habitat for as long a period of time
as either alluvial terrace habitat or the
open serpentine barrens. As a result, the
rate of succession to woody vegetation
is not as well understood. It is likely
that the rate of succession to woody
habitat is less within geologic transition
zone habitat than alluvial terrace, but
greater than the rate of succession
compared to open serpentine barrens.
Succession of plant communities is a
natural process and may result in loss
of current or potential habitat. However,
the amount of new sub-occurrences that
have been identified lessen the
immediate risk to the existence of the
species; therefore, succession to woody
shrub community is not currently a
species-level threat. No occurrences of
San Benito evening-primrose have been
extirpated due to succession of woody
vegetation since monitoring began in
1980, and, because San Benito eveningprimrose grows on serpentine soils,
threats to the species from succession to
woody vegetation is also unlikely to be
a threat in the foreseeable future.
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Stochastic Events
At the time of listing, only nine
occurrences of San Benito eveningprimrose were known within a
relatively restricted range. The small
number of occurrences increased the
susceptibility of the species to
extinction from a stochastic event, such
as a fire, flood, drought, or other
unpredictable event, because a single
event had the capability to negatively
impact all known occurrences at the
same time. The threat from stochastic
events due to a small number of
occurrences has decreased as the
number of known occurrences has
increased to 79 occurrences (519 suboccurrences or 658 point locations)
occurring across multiple watersheds,
and into a new habitat type (the geologic
transition zone). The species’ current
known range is bordered on the north
by New Idria Road near the confluence
of Larious Creek and San Carlos Creek,
to the south at the Monterey County line
near Lewis Creek, to the west near the
Hernandez Reservoir, and to the east by
the eastern boundary of the Serpentine
ACEC, an area of approximately 307
square miles.
Within this broad range,
approximately 260 ac (105 ha) is
considered potential habitat (BLM 2018,
p. 31) and 63.2 ac (25.6 ha) are known
to be occupied. Despite the occupied
area being relatively small, it is spread
over a large geographic area across
multiple habitat types and many
occurrences, suggesting a low
possibility of extinction from a single
stochastic event. The presence of a longlived and well-established seed bank
further insulates San Benito eveningprimrose from the possibility of
extinction due to a single stochastic
event. The land management practices
of the BLM within the CCMA have
promoted preserving and restoring San
Benito evening-primrose habitat and the
natural soil processes and hydrology of
the watersheds it occurs within as well.
Stochastic events are unlikely to
threaten the species in the foreseeable
future due to the current range of San
Benito evening-primrose and number of
known occurrences.
Climate Change
The terms ‘‘climate’’ and ‘‘climate
change’’ are defined by the
Intergovernmental Panel on Climate
Change. The term ‘‘climate change’’ thus
refers to a change in the mean or
variability of one or more measures of
climate (for example, temperature or
precipitation) that persists for an
extended period, whether the change is
due to natural variability or human
activity (IPCC 2014a, pp. 119–120). The
effects of climate change are wide
ranging but include alteration of
historical climate patterns including
storm frequency and severity, seasonal
shifts in temperatures, and changing
precipitation patterns. Globally, these
effects may be positive, neutral, or
negative for any given species,
ecosystem, land use, or resource, and
they may change over time (IPCC 2014b,
pp. 49–54; IPCC 2018, pp. 9–12).
Potential effects derived from climate
change have consequences for the
biological environment and may result
in changes to the suitability of currently
occupied habitat through increased
drought stress, shortened growing
seasons, and alteration of the historical
soil and hydrologic cycles. The
synthesis report that was issued by IPCC
is conclusive that future climate
conditions will be dissimilar from
current climate conditions. The effects
of these changes to San Benito eveningprimrose and its habitat are not known,
but we may reasonably infer potential
effects from the globally anticipated
changes. The State of California
assessment on climate change provides
a better estimate for the effects of
climate change to areas occupied by San
Benito evening-primrose.
California released its fourth climate
change assessment in 2018 (Langridge
2018, entire). The California assessment
differs from the IPCC assessments in
that it is localized to the State and has
specific analyses for nine regions within
the State. California’s Fourth Climate
Change Assessment uses downscaled
versions of the global climate models
used by IPCC to create localized
predictions based on future emissions
scenarios in order to provide relevant
predictions for management and
planning. The range of San Benito
evening-primrose falls within the
Central Coast region of California’s
fourth climate change assessment. In
general, the region is expected to
experience increasing minimum and
maximum temperatures and slight
increases in precipitation with
significant increases in variability
(Langridge 2018, p. 6). These expected
trends are slightly variable across the
three watersheds within which San
Benito evening-primrose occurs
(hydrologic unit code (HUC) 10): Upper
San Benito River, Los Gatos Creek, and
Larious Creek–Silver Creek. The
predicted increases in minimum
temperature, maximum temperature,
and precipitation are similar for both
high (representative concentration
pathway (RCP) 8.5) and low (RCP 4.5)
emissions scenarios and across model
variations (Cal-adapt 2018, p. NA; table
5).
TABLE 5—CHANGES IN PRECIPITATION, MINIMUM AVERAGE TEMPERATURE, AND MAXIMUM AVERAGE TEMPERATURE FOR
LOW AND HIGH EMISSION SCENARIOS COMPARED TO HISTORICAL AVERAGES FOR THE THREE WATERSHEDS WITHIN
WHICH SAN BENITO EVENING-PRIMROSE OCCURS
Precipitation
(inches)
Min avg. temp.
(degrees F)
Max avg. temp.
(degrees F)
Watershed
Historical
average
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Upper San Benito River ...........................
Los Gatos Creek ......................................
Larious Creek–Silver Creek .....................
17.8
14.4
15.1
RCP 4.5
(RCP 8.5)
Historical
average
20.4 (19.7)
16.8 (15.3)
17.4 (16.6)
38.9
44.7
42.3
RCP 4.5
(RCP 8.5)
41.7 (42.3)
47.5 (48.1)
45.3 (45.9)
Historical
average
71.0
74.8
72.3
RCP 4.5
(RCP 8.5)
73.9 (74.4)
77.6 (78.1)
75.3 (75.8)
Watersheds are based on the HUC 10 resolution. Reported values for the modeled futures are based on the average of the HadGEM2–ES
(warmer and drier), CNRM–CM5 (cooler and wetter), and CanESM2 (average) models. The RCP 4.5 scenario refers to a future scenario where
emissions peak near 2040 and then decline, while RCP 8.5 refers to a scenario where emissions continue to rise strongly through 2050 and plateau near 2100. The historical average is based on the years 1950–2005 as reported by cal-adapt.org. The modeled values are estimates from
the years 2020–2050.
Based on the state of California
assessment of climate change, the IPCC
data, taking into account known
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uncertainties with climate change
projection, the effects of the predicted
changes due to climate change to
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occurrences of San Benito eveningprimrose are varied. A slight increase in
precipitation may provide additional
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water during the growing season, but
the variability between seasons may
result in long periods of drought
followed by high-volume precipitation
that may cause erosion. Increasing
minimum temperatures may reduce the
amount of days with frost, thereby
altering the physical cues for
germination, and increasing maximum
temperatures could result in increased
stress for flowering individuals.
Conversely, increased amounts of rain
may promote increased germination and
seedling success. In order to precisely
understand the effects of climate
change, location-specific data on
temperature, precipitation, San Benito
evening-primrose germination, seedling
success, and seed bank cycling over
multiple years would be needed.
Shifts in community composition are
likely to occur as a result of changes in
California’s climate and may impact the
long-term suitability of currently
occupied and potential habitat for San
Benito evening-primrose. All California
macrogroups of vegetation are expected
to have moderate to high risk of
vulnerability to climate change (Thorne
et al. 2016, p. 1). This means that all
vegetation communities are susceptible
to portions of their current range
becoming unsuitable. It is also possible
that previously unsuitable areas for a
given macrogroup will become suitable
as physical parameters that were
previously unfavorable become
favorable. Vegetation communities
migrating higher in elevation along
temperature gradients or moving upland
as sea levels rise along hydrological
gradients are typical examples of this
scenario. However, the ability of a
vegetation macrogroup to migrate
assumes that natural seed dispersal
pathways are available and that
undeveloped land exists along dispersal
pathways.
San Benito evening-primrose occurs
within three macrogroups within San
Benito and Fresno Counties: California
foothill and valley forests and
woodlands, chaparral, and California
annual and perennial grassland.
California foothill and valley forests and
woodlands and chaparral are both
ranked at moderate risk of vulnerability,
and California annual and perennial
grassland is ranked as moderate to high
risk of vulnerability (Thorne et al. 2016,
p. 3; table 6). Estimates of the percent
of existing habitat that will become
unsuitable, have no change, or become
newly suitable based on low and high
emissions scenarios are shown in table
6 based on data within Thorne et al.
(2016, pp. 33–41; 114–122; 132–140).
TABLE 6—RESULTS OF SENSITIVITY AND ADAPTIVE CAPACITY MODELING AND THE RESULTING CHANGE IN SUITABILITY OF
EXISTING HABITAT FOR THREE VEGETATION MACROGROUPS WITHIN WHICH SAN BENITO EVENING-PRIMROSE OCCURS
Mean
vulnerability
rank
Vegetation macrogroup
California foothill and valley forests
and woodlands.
Chaparral .............................................
California annual and perennial grassland.
Unsuitable
Low
(%)
No change
High
(%)
Low
(%)
Newly suitable
High
(%)
Low
(%)
High
(%)
Moderate ........
24
59
41
76
11
34
Moderate ........
Mid-High ........
8
16
54
48
46
52
92
84
17
10
47
52
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Data from Thorne et al. 2016 pp. 3; 33–41; 114–122; 132–140.
Under both high and low emissions
scenarios, currently suitable habitat for
San Benito evening-primrose is lost due
to changes in climate. Conversely, the
species that compose the vegetation
communities that are associated with
San Benito evening-primrose are
expected to have the capability to
migrate into newly suitable habitat. The
primary concern, in regard to San
Benito evening-primrose habitat, is the
threat of an increase in woody
vegetation as a response to climate
change. However, San Benito eveningprimrose is found in serpentine and
serpentine-derived soils that are not
likely to be affected by climate change
in the foreseeable future. The edaphic
(soil) conditions may restrain woody
vegetation migration into areas currently
occupied. While the soil type may
mitigate habitat loss due to habitat
conversion, it may also restrain the
species from dispersing to areas where
climatic conditions are more favorable
for survival. The currently predicted
changes in precipitation and climate do
not suggest that the species may become
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endangered due to those changes in the
foreseeable future.
Existing Regulatory Mechanisms
State Protections
San Benito evening-primrose is not a
State-listed taxon under the California
Endangered Species Act. The species is
listed by the California Native Plant
Society (CNPS) as 1B.1, indicating that
the taxon is rare throughout its range
and is generally endemic to California
as well as having been reduced
throughout its historical range. Species
listed by CNPS as 1B.1 meet the
definition of threatened in the California
Endangered Species Act as described in
the California Fish and Game Code
(CNPS 2018 Rare Plant Inventory
website) and must therefore be
considered during environmental
analysis for California Environmental
Quality Act (CEQA) documentation
(CEQA 2018 Guidelines Section 15380).
Federal Protections
In 2001, the BLM published the
National Management Strategy for
Motorized Off-Highway Vehicle Use on
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Public Lands. This guiding document
ensures consistent and positive
management of environmentally
responsible motorized OHV use on
public lands. Detailed regulations are
established in BLM’s 2014 Resource
Management Plan for the CCMA that
provides for protections of San Benito
evening-primrose. BLM’s 2014 Resource
Management Plan for the CCMA is in
place until superseded. The restriction
of OHV use within the CCMA and the
Serpentine ACEC is based on concerns
of health risks and will be unaffected by
the delisting of San Benito eveningprimrose. Currently, only highwaylicensed vehicles are allowed within the
Serpentine ACEC on designated roads
and by permit, which is limited to five
use-days per year per person, and
within the CCMA trail riding is
restricted to designated areas near
Condon Peak (BLM 2014, p. 1–18). The
Post-delisting Monitoring Plan will
provide for continued evaluation of the
status of occurrences to prevent the
species from again becoming warranted
for listing under the Federal Endangered
Species Act.
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The BLM has regulations and policies
that guide the management of natural
resources on the public lands they
manage. In particular, Congress passed
the Federal Land Policy and
Management Act of 1976 to provide
policy for ‘‘the management, protection,
development, and enhancement’’ of
public lands managed by the BLM. This
law directs the BLM to ‘‘take any action
necessary to prevent unnecessary or
undue degradation of the lands’’ during
mining operations (43 U.S.C. 1732(b)).
Mining operations that exceed 5 acres
(2.02 ha), and certain other defined
operations, require a plan of operations
approved by the BLM (43 CFR 3809.1–
4, 1–6).
BLM may enact special rules to
protect soil, vegetation, wildlife,
threatened or endangered species,
wilderness suitability, and other
resources by immediately closing
affected areas to off-road vehicles that
are causing resource damage until the
adverse effects are eliminated and
measures are implemented to prevent
recurrence (43 FR 8340–8364).
Two Executive Orders (E.O.) apply
specifically to off-road vehicles on
public lands: E.O. 11644 directs
agencies to designate zones of off-road
use that are based on protecting natural
resources, the safety of all users, and
minimizing conflicts among various
land uses. The BLM and other agencies
are to locate such areas and trails to
minimize damage to soil, watershed,
vegetation, or other resources, and to
minimize disruption to wildlife and
their habitats. Areas may be located in
designated park and refuge areas or
natural areas only if the head of the
agency determines that off-road use will
not adversely affect the natural,
aesthetic, or scenic values of the
locations. The respective agencies are to
ensure adequate opportunity for public
participation in the designation of areas
and trails.
E.O. 11989 amends the previous order
by adding the following stipulations: (a)
Whenever the agency determines that
the use of off-road vehicles will cause or
is causing considerable adverse effects
on the soil, vegetation, wildlife, wildlife
habitat, or cultural or historic resources
of particular areas or trails on public
lands, it is to immediately close the
areas or trails to the type of off-road
vehicle causing the effects until it
determines that the adverse effects have
ceased and that measures are in place to
prevent future recurrence; and (b) each
agency is to close portions of public
lands within its jurisdiction to off-road
vehicles except areas or trails
designated as suitable and open to offroad vehicle use.
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As San Benito evening-primrose is a
listed species under the Act, the BLM is
required to consult with the Service on
any activities it funds, authorizes, or
carries out that may affect San Benito
evening-primrose. There are no Federal
prohibitions under the Act for
negatively impacting listed plants on
non-Federal lands, unless a person
damages or destroys federally listed
plants while in violation of a State law
or a criminal trespass law. Where the
species occurs on private lands,
protections afforded by section 7(a)(2) of
the Act are triggered only if there is a
Federal nexus (i.e., an action funded,
permitted, or carried out by a Federal
agency). If the species is delisted, the
protections afforded by the Act would
no longer apply. Even in the absence of
the protections of the Act, adequate
regulatory mechanisms are in place,
such as the Federal Land Policy and
Management Act of 1976, E.O. 11644
and E.O. 11989, to ensure the continued
persistence of San Benito eveningprimroses occurrences and suitable
potential habitat.
Summary of Threats Analysis
A very limited range, small number of
occurrences, and direct and indirect
threats from OHV use and mining and
associated facilities and road
maintenance were the primary threats to
San Benito evening-primrose at the time
of listing in 1985 (50 FR 5755–5759,
February 12, 1985). OHV use continued
to be a significant threat to San Benito
evening-primrose until the temporary
closure of the Serpentine ACEC in 2008.
The 2014 Resource Management Plan
permanently reduced the amount of
exposure San Benito evening-primrose
has to OHV recreation and has resulted
in indirectly removing the most
significant threat to the species, which
was direct loss of individuals by OHV
recreation and indirect loss of habitat
and seed bank through erosion on
slopes and soil compaction on alluvial
terraces. The threat from mining was
reduced by 2002 with the closure of the
last commercial mine, and future threats
from mining are unlikely based on BLM
management actions listed in the 2014
Resource Management Plan for the
CCMA. Habitat alteration from invasive
species and succession to woody
vegetation communities are not likely to
threaten San Benito evening-primrose
because invasive species and woody
vegetation communities are intolerant to
serpentine soils. The significant
increase in the number of known
occurrences and the associated increase
in range and the new habitat association
greatly reduce the threat of stochastic
events resulting in significant loss to the
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species. The effects of climate change on
the species are predicted changes in
temperature and rainfall by 2050, and
do not suggest species-level threats to
survival.
When individual threats that
influence reproductive output,
germination, and survival occur
together, one threat may add to, or
exacerbate, the effects of another,
resulting in a disproportionate increase
in threat to the species. When this
occurs, we call the interactive effects
synergistic or cumulative. The lack of
current threats to San Benito eveningprimrose reduce the possibility of
synergistic or cumulative effects
occurring, and, given the current range
of the species, number of known
occurrences, and likelihood of new
occurrences to become known,
synergistic and cumulative effects do
not pose a significant population-level
impact to San Benito evening-primrose
at this time nor do we anticipate that
they will in the future.
Determination of San Benito EveningPrimrose Status
Section 4 of the Act (16 U.S.C. 1533)
and its implementing regulations (50
CFR part 424) set forth the procedures
for determining whether a species meets
the definition of ‘‘endangered species’’
or ‘‘threatened species.’’ The Act defines
an ‘‘endangered species’’ as a species
that is ‘‘in danger of extinction
throughout all or a significant portion of
its range,’’ and a ‘‘threatened species’’ as
a species that is ‘‘likely to become an
endangered species within the
foreseeable future throughout all or a
significant portion of its range.’’ For a
more detailed discussion on the factors
considered when determining whether a
species meets the definition of
‘‘endangered species’’ or ‘‘threatened
species’’ and our analysis on how we
determine the foreseeable future in
making these decisions, see Regulatory
Framework, above.
Status Throughout All of Its Range
After evaluating threats to the species
and assessing the cumulative effect of
the threats under the section 4(a)(1)
factors, we have assessed the best
scientific and commercial information
available regarding the past, present,
and future threats faced by San Benito
evening-primrose in this proposed rule.
At the time of listing in 1985 (50 FR
5755–5759, February 12, 1985), San
Benito evening-primrose was known
from only nine occurrences within a
very narrow range that were all subject
to potential loss from the threats listed
in Factors A through E.
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Off-highway vehicle recreation
(Factor A), the greatest persistent threat
to the species, has been reduced to
levels that no longer pose a significant
threat of extinction to San Benito
evening-primrose or loss of its habitat,
due to the closure of the Serpentine
ACEC and the restriction of OHV use
within the CCMA but outside of the
Serpentine ACEC. Most significantly,
surveys by the BLM have shown that the
species is much more wide-ranging and
common than originally known and
occurs across a broader range of habitat
types. The number of known
occurrences has increased from 9 to 79
and includes 658 mapped point
locations. The range of the species is
now known from three watersheds, and
occupied habitat covers 63.2 acres (25.6
ha). Our understanding of the ecology of
the species has demonstrated that the
species may persist through periods of
disturbance due to the persistence of a
robust and long-lived seedbank that
facilitates reestablishment, dispersal,
and buffers against stochastic events.
Annual surveys of San Benito eveningprimrose have demonstrated that there
is a large amount of interannual
variation in numbers of individuals
observed. We believe that the 27
occurrences that have been monitored
since 1983 have remained relatively
stable around a 5-year moving average
when the abnormally high count year
(1988) is considered. Furthermore, the
significant increase in the number of
occurrences is not represented in the
analysis of the 27 occurrences that were
known at the time the Recovery Plan
was written. The best available
information indicates that Factors B, C,
and E are not affecting the species and
are unlikely to do so in the foreseeable
future. The existing regulatory
mechanisms in place are adequate to
ensure the continued persistence of San
Benito evening-primrose occurrences
and suitable potential habitat because a
majority of occurrences are managed on
Federal land and are protected by a
2014 BLM Resources Management Plan
and a BLM Area of Critical
Environmental Concern (ACEC)
designation. Based on the information
presented in this status review, the
recovery criteria in the Recovery Plan
have been achieved and the recovery
goal identified in the Recovery Plan has
been met for San Benito eveningprimrose. Thus, after assessing the best
available information, we conclude that
San Benito evening-primrose is not in
danger of extinction throughout all of its
range either now or within the
foreseeable future.
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Status Throughout a Significant Portion
of Its Range
Under the Act and our implementing
regulations, a species may warrant
listing if it is in danger of extinction or
likely to become so within the
foreseeable future throughout all or a
significant portion of its range.
Having determined that San Benito
evening-primrose is not in danger of
extinction or likely to become so within
the foreseeable future throughout all of
its range, we now consider whether it
may be in danger of extinction or likely
to become so within the foreseeable
future in a significant portion of its
range. The range of a species can
theoretically be divided into portions in
an infinite number of ways, so we first
screen the potential portions of the
species’ range to determine if there are
any portions that warrant further
consideration. To do the ‘‘screening’’
analysis, we ask whether there are
portions of the species’ range for which
there is substantial information
indicating that: (1) The portion may be
significant; and (2) the species may be,
in that portion, either in danger of
extinction or likely to become so in the
foreseeable future. For a particular
portion, if we cannot answer both
questions in the affirmative, then that
portion does not warrant further
consideration and the species does not
warrant listing because of its status in
that portion of its range. Conversely, we
emphasize that answering both of these
questions in the affirmative is not a
determination that the species is in
danger of extinction or likely to become
so in the foreseeable future throughout
a significant portion of its range—rather,
it is a step in determining whether a
more-detailed analysis of the issue is
required.
If we answer these questions in the
affirmative, we then conduct a more
thorough analysis to determine whether
the portion does indeed meet both of the
‘‘significant portion of the range
prongs’’: (1) The portion is significant
and (2) the species is, in that portion,
either in danger of extinction or likely
to become so within the foreseeable
future. Confirmation that a portion does
indeed meet one of these prongs does
not create a presumption, prejudgment,
or other determination as to whether the
species is an endangered species or
threatened species. Rather, we must
then undertake a more detailed analysis
of the other prong to make that
determination. Only if the portion does
indeed meet both significant portion of
the range prongs would the species
warrant listing because of its status in a
significant portion of its range.
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33077
We evaluated the range of San Benito
evening-primrose to determine if any
area may be a significant portion of the
range. San Benito evening-primrose is a
narrow endemic that occurs over 300
square miles, but occupies a relatively
small amount of acreage (63.2 ac (25.6
ha) of occupied habitat). Genetic
analysis indicated no differentiation in
occurrences based on watershed or
habitat and that there was no
hybridization with a close relative.
Every threat to the species in any
portion of its range is a threat to the
species throughout all of its range, and
so the species has the same status under
the Act throughout its narrow range.
Therefore, we conclude, based on this
screening analysis, that the species is
not in danger of extinction or likely to
become so in the foreseeable future in
any significant portion of its range. Our
conclusion—that we do not undertake
additional analysis if we determine that
the species has the same status under
the Act throughout its narrow range—is
consistent with the courts’ holdings in
Desert Survivors v. Department of the
Interior, No. 16–cv–01165–JCS, 2018
WL 4053447 (N.D. Cal. Aug. 24, 2018);
Center for Biological Diversity v. Jewell,
248 F. Supp. 3d, 946, 959 (D. Ariz.
2017); and Center for Biological
Diversity v. Everson, 2020 WL 437289
(D.D.C. Jan. 28, 2020).
Determination of Status
Our review of the best scientific and
commercial data available indicates that
the San Benito evening-primrose does
not meet the definition of an
endangered species or a threatened
species in accordance with sections 3(6)
and 3(20) of the Act. Therefore, we
propose to delist the San Benito
evening-primrose from the List of
Endangered and Threatened Plants.
Effects of This Rule
If this proposed rule is made final, it
would revise 50 CFR 17.12(h) to remove
San Benito evening-primrose from the
Federal List of Endangered and
Threatened Plants. The prohibitions and
conservation measures provided by the
Act, particularly through sections 7 and
9, would no longer apply to San Benito
evening-primrose. Federal agencies
would no longer be required to consult
with the Service under section 7 of the
Act in the event that activities they
authorize, fund, or carry out may affect
San Benito evening-primrose.
Post-Delisting Monitoring
Section 4(g)(1) of the Act requires us
to implement a system to monitor
effectively, for not less than 5 years, all
species that have been recovered and
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delisted (50 CFR 17.11, 17.12). The
purpose of this post-delisting
monitoring is to verify that a species
remains secure from the risk of
extinction after it has been removed
from the protections of the Act. The
monitoring is designed to detect the
failure of any delisted species to sustain
itself without the protective measures
provided by the Act. If, at any time
during the monitoring period, data
indicate that protective status under the
Act should be reinstated, we can initiate
listing procedures, including, if
appropriate, emergency listing under
section 4(b)(7) of the Act. Section 4(g) of
the Act explicitly requires us to
cooperate with the States in
development and implementation of
post-delisting monitoring programs, but
we remain responsible for compliance
with section 4(g) and, therefore, must
remain actively engaged in all phases of
post-delisting monitoring. We also seek
active participation of other entities that
are expected to assume responsibilities
for the species’ conservation postdelisting.
Post-Delisting Monitoring Overview
If we make this proposed rule final,
the post-delisting monitoring is
designed to verify that San Benito
evening-primrose remains secure from
the risk of extinction after its removal
from the Federal List of Endangered and
Threatened Plants by detecting changes
in trend and habitat suitability. A draft
post-delisting monitoring plan for the
species can be found at https://
www.regulations.gov under Docket No.
FWS–R8–ES–2019–0065. If this
proposed rule is finalized, the final
post-delisting monitoring plan will be
agreed upon by the Service and the BLM
prior to publication of a final rule.
Required Determinations
jbell on DSKJLSW7X2PROD with PROPOSALS
Clarity of the Rule
We are required by Executive Orders
12866 and 12988 and by the
Presidential Memorandum of June 1,
1998, to write all rules in plain
language. This means that each rule we
publish must:
(a) Be logically organized;
(b) Use the active voice to address
readers directly;
VerDate Sep<11>2014
16:32 May 29, 2020
Jkt 250001
(c) Use clear language rather than
jargon;
(d) Be divided into short sections and
sentences; and
(e) Use lists and tables wherever
possible.
If you feel that we have not met these
requirements, send us comments by one
of the methods listed in ADDRESSES. To
better help us revise the rule, your
comments should be as specific as
possible. For example, you should tell
us the names of the sections or
paragraphs that are unclearly written,
which sections or sentences are too
long, the sections where you feel lists or
tables would be useful, etc.
National Environmental Policy Act (42
U.S.C. 4321 et seq.)
It is our position that, outside the
jurisdiction of the U.S. Court of Appeals
for the Tenth Circuit, we do not need to
prepare an environmental analyses
pursuant to the National Environmental
Policy Act of 1969 (NEPA; 42 U.S.C.
4321 et seq.) in connection with
regulations adopted pursuant to section
4(a) of the Act. We published a notice
outlining our reasons for this
determination in the Federal Register
on October 25, 1983 (48 FR 49244). This
position was upheld by the U.S. Court
of Appeals for the Ninth Circuit
(Douglas County v. Babbitt, 48 F.3d
1495 (9th Cir. 1995), cert. denied 516
U.S. 1042 (1996)).
Government-to-Government
Relationship With Tribes
In accordance with the President’s
memorandum of April 29, 1994
(Government-to-Government Relations
with Native American Tribal
Governments; 59 FR 22951), Executive
Order 13175 (Consultation and
Coordination with Indian Tribal
Governments), and the Department of
the Interior’s manual at 512 DM 2, we
readily acknowledge our responsibility
to communicate meaningfully with
recognized Federal Tribes on a
government-to-government basis. In
accordance with Secretarial Order 3206
of June 5, 1997 (American Indian Tribal
Rights, Federal-Tribal Trust
Responsibilities, and the Endangered
Species Act), we readily acknowledge
our responsibilities to work directly
PO 00000
Frm 00048
Fmt 4702
Sfmt 9990
with tribes in developing programs for
healthy ecosystems, to acknowledge that
tribal lands are not subject to the same
controls as Federal public lands, to
remain sensitive to Indian culture, and
to make information available to tribes.
There are no tribal lands associated with
this proposed rule.
References Cited
A complete list of all references cited
in this proposed rule is available on the
internet at https://www.regulations.gov
under Docket No. FWS–R8–ES–2019–
0065, or upon request from the Ventura
Fish and Wildlife Office (see FOR
FURTHER INFORMATION CONTACT).
Authors
The primary authors of this proposed
rule are the staff members of the
Ventura Fish and Wildlife Office in
Ventura, California, in coordination
with the Pacific Southwest Regional
Office in Sacramento, California.
List of Subjects in 50 CFR Part 17
Endangered and threatened species,
Exports, Imports, Reporting and
recordkeeping requirements,
Transportation.
Proposed Regulation Promulgation
Accordingly, we propose to amend
part 17, subchapter B of chapter I, title
50 of the Code of Federal Regulations,
as set forth below:
PART 17—ENDANGERED AND
THREATENED WILDLIFE AND PLANTS
1. The authority citation for part 17
continues to read as follows:
■
Authority: 16 U.S.C. 1361–1407; 1531–
1544; and 4201–4245, unless otherwise
noted.
§ 17.12
[Amended]
2. In § 17.12(h), remove the entry for
‘‘San Benito evening-primrose
(Camissonia benitensis)’’ under
FLOWERING PLANTS from the List of
Endangered and Threatened Plants.
■
Aurelia Skipwith,
Director, U.S. Fish and Wildlife Service.
[FR Doc. 2020–11024 Filed 5–29–20; 8:45 am]
BILLING CODE 4333–15–P
E:\FR\FM\01JNP1.SGM
01JNP1
Agencies
[Federal Register Volume 85, Number 105 (Monday, June 1, 2020)]
[Proposed Rules]
[Pages 33060-33078]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-11024]
=======================================================================
-----------------------------------------------------------------------
DEPARTMENT OF THE INTERIOR
Fish and Wildlife Service
50 CFR Part 17
[Docket No. FWS-R8-ES-2019-0065; 4500030113]
RIN 1018-BE11
Endangered and Threatened Wildlife and Plants; Removing San
Benito Evening-Primrose (Camissonia benitensis) From the Federal List
of Endangered and Threatened Plants
AGENCY: Fish and Wildlife Service, Interior.
ACTION: Proposed rule.
-----------------------------------------------------------------------
SUMMARY: We, the U.S. Fish and Wildlife Service (Service or USFWS),
propose to remove San Benito evening-primrose (Camissonia benitensis)
from the Federal List of Endangered and Threatened Plants. This
determination is based on a thorough review of the best available
scientific and commercial information, which indicates that the threats
to the species have been reduced or eliminated so that the plant no
longer meets the definition of an endangered or threatened species
under the Endangered Species Act of 1973, as amended (Act). We are
seeking information and comments from the public regarding this
proposed rule and the draft post-delisting monitoring plan for San
Benito evening-primrose.
DATES: We will accept comments received or postmarked on or before July
31, 2020. Comments submitted electronically using the Federal
eRulemaking Portal (see ADDRESSES, below) must be received by 11:59
p.m. Eastern Time on the closing date. We must receive requests for
public hearings, in writing, at the address shown in FOR FURTHER
INFORMATION CONTACT by July 16, 2020.
ADDRESSES:
Comment submission: You may submit comments by one of the following
methods:
(1) Electronically: Go to the Federal eRulemaking Portal: https://www.regulations.gov. In the Search box, enter FWS-R8-ES-2019-0065,
which is the docket number for this rulemaking. Then click on the
Search button. On the resulting page, in the Search panel on the left
side of the screen, under the Document Type heading, click on the
Proposed Rules link to locate this document. You may submit a comment
by clicking on ``Comment Now!''
(2) By hard copy: Submit by U.S. mail to: Public Comments
Processing, Attn: FWS-R8-ES-2019-0065; U.S. Fish and Wildlife Service,
MS: JAO/1N; 5275 Leesburg Pike, Falls Church, VA 22041-3803.
We request that you send comments only by the methods described
above. We will post all comments on https://www.regulations.gov. This
generally means that we will post any personal information you provide
us (see Information Requested, below, for more information).
Document availability: The recovery plan, 5-year review summary,
and draft post-delisting monitoring plan referenced in this document
are available at https://www.regulations.gov under Docket No. FWS-R8-ES-
2019-0065.
[[Page 33061]]
FOR FURTHER INFORMATION CONTACT: Stephen P. Henry, Field Supervisor,
U.S. Fish and Wildlife Service, Ventura Fish and Wildlife Office, 2493
Portola Road, Suite B, Ventura, CA 93003; by telephone 805-644-1766. If
you use a telecommunications device for the deaf (TDD), call the
Federal Relay Service at 800-877-8339.
SUPPLEMENTARY INFORMATION:
Executive Summary
Why we need to publish a rule. Under the Act, a species may warrant
removal (i.e., ``delisting'') from the Federal List of Endangered and
Threatened Plants if it no longer meets the definition of an endangered
species or a threatened species. Delisting a species can only be
completed by issuing a rule.
What this document does. We propose to remove San Benito evening-
primrose (Camissonia benitensis) from the Federal List of Endangered
and Threatened Plants.
The basis for our action. Under the Act, we may determine that a
species is an endangered or threatened species because of any of five
factors: (A) The present or threatened destruction, modification, or
curtailment of its habitat or range; (B) overutilization for
commercial, recreational, scientific, or educational purposes; (C)
disease or predation; (D) the inadequacy of existing regulatory
mechanisms; or (E) other natural or manmade factors affecting its
continued existence. We have determined that the threats to the species
have been reduced or eliminated so that the plant no longer meets the
definition of an endangered or threatened species under the Act. We are
seeking information and comments from the public regarding this
proposed rule and the draft post-delisting monitoring plan for the
species. We will also seek peer review.
San Benito evening-primrose, a small annual plant with bright
yellow flowers, is found in the central coast range in California's San
Benito, Monterey, and Fresno counties. The scientific community's
understanding of the San Benito evening-primrose's ecology and habitat
has improved since time of listing due to the efforts of the Bureau of
Land Management (BLM) to survey and study the plant over the last three
decades. We listed San Benito evening-primrose as threatened in 1985
due to ongoing threats of motorized recreation activities and
commercial mining operations. At the time of listing, the San Benito
evening-primrose was documented in only nine locations in a small area
of only San Benito County.
Off-highway vehicle recreation, the greatest persistent threat to
the species, has been reduced to levels that no longer pose a
significant threat of extinction to San Benito evening- primrose or its
habitat due to the closure of the Serpentine Area of Critical
Environmental Concern, and the restriction of off-highway vehicle use
within the Clear Creek Management Area. Most significantly, the species
is much more wide-ranging and common than originally known and occurs
across a broader range of habitat types (BLM 2018, p. 32). The number
of known occurrences has increased from nine to 79 and the range of the
species is now known from three watersheds and occupied habitat covers
63.2 acres (25.6 ha). The species persists through periods of
disturbance due to the persistence of a robust and long lived seedbank
that facilitates reestablishment, dispersal, and buffers against
stochastic events. Annual surveys of San Benito evening-primrose have
demonstrated a large amount of interannual variation in numbers of
individuals observed. We conclude that the 27 occurrences that have
been monitored since 1983 have remained relatively stable around a 5-
year moving average when the abnormally high count year (1988) is
considered. Furthermore, the significant increase in the number of
occurrences detected by recent BLM surveys is not represented in the
analysis of the 27 occurrences that were known at the time the Recovery
Plan was written. The existing regulatory mechanisms in place are
adequate to ensure the continued persistence of San Benito evening-
primrose occurrences and suitable potential habitat. Based on the best
available information, the intent of the recovery criteria and the
recovery goal identified in the Recovery Plan has been met for the
species. We, therefore, conclude that San Benito evening-primrose is no
longer a threatened species throughout its range, nor is it likely to
become so within the foreseeable future.
Peer review. In accordance with our joint policy on peer review
published in the Federal Register on July 1, 1994 (59 FR 34270), and
our August 22, 2016, memorandum updating and clarifying the role of
peer review of listing actions under the Act, we will seek the expert
opinions of at least three appropriate specialists regarding this
proposed rule. The purpose of peer review is to ensure that our
classification determinations are based on scientifically sound data,
assumptions, and analyses. The peer reviewers have expertise in the
biology, habitat, and threats to the species. A peer review panel will
conduct an assessment of the proposed rule and the specific assumptions
and conclusions regarding the proposed delisting. This assessment will
be completed during the public comment period.
Because we will consider all comments and information we receive
during the comment period, our final determinations may differ from
this proposal. Based on the new information we receive (and any
comments on that new information), we may conclude that the species is
still warranted for listing. Such final decisions would be a logical
outgrowth of this proposal, as long as we: (1) Base the decisions on
the best scientific and commercial data available after considering all
of the relevant factors; (2) do not rely on factors Congress has not
intended us to consider; and (3) articulate a rational connection
between the facts found and the conclusions made, including why we
changed our conclusion.
Information Requested
We intend any final action resulting from this proposal will be
based on the best scientific and commercial data available and be as
accurate and as effective as possible. Therefore, we request comments
or information from other governmental agencies, Native American
tribes, the scientific community, industry, or other interested parties
concerning this proposed rule. We particularly seek comments
concerning:
(1) The extent of any current threats to the species and its
habitat.
(2) The potential for shrub encroachment to reduce suitable habitat
for the species.
(3) The ability of previously degraded habitat to return to
suitable habitat for colonization and/or reintroduction.
(4) The lasting effects of past off-highway vehicle (OHV) use and
the level of natural restoration to those areas of suitable habitat
disturbed by OHV use.
(5) The potential for climate change to either positively or
negatively affect the species.
(6) The climatic conditions under which germination naturally
occurs and by which seed set is initiated.
(7) The monitoring guidelines proposed for the post-delisting
monitoring plan and whether they appropriately characterize the extent
of disturbance and can adequately identify the thresholds at which San
Benito evening-primrose can persist.
Please include sufficient information with your submission (such as
scientific journal articles or other publications) to allow us to
verify any scientific or commercial information you include.
[[Page 33062]]
Please note that submissions merely stating support for, or
opposition to, the action under consideration without providing
supporting information, although noted, will not be considered in
making a determination, as section 4(b)(1)(A) of the Act directs that
determinations as to whether any species is an endangered or threatened
species must be made ``solely on the basis of the best scientific and
commercial data available.''
You may submit your comments and materials concerning this proposed
rule by one of the methods listed in ADDRESSES. We request that you
send comments only by the methods described in ADDRESSES.
If you submit information via https://www.regulations.gov, your
entire submission--including any personal identifying information--will
be posted on the website. If your submission is made via a hardcopy
that includes personal identifying information, you may request at the
top of your document that we withhold this information from public
review. However, we cannot guarantee that we will be able to do so. We
will post all hardcopy submissions on https://www.regulations.gov.
Comments and materials we receive, as well as supporting
documentation we used in preparing this proposed rule, will be
available for public inspection on https://www.regulations.gov, or by
appointment, during normal business hours, at the U.S. Fish and
Wildlife Service, Ventura Fish and Wildlife Office (see FOR FURTHER
INFORMATION CONTACT).
Public Hearing
Section 4(b)(5)(E) of the Act provides for one or more public
hearings on this proposal, if requested. We must receive requests for
public hearings, in writing, at the address shown in FOR FURTHER
INFORMATION CONTACT by the date shown in DATES. We will schedule a
public hearing on this proposal, if any are requested, and announce the
date, time, and place of those hearings, as well as how to obtain
reasonable accommodation, in the Federal Register at least 15 days
before the first hearing. For the immediate future, we will provide
these public hearings using webinars that will be announced on the
Service's website, in addition to the Federal Register. The use of
these virtual public hearings is consistent with our regulation at 50
CFR 424.16(c)(3).
Previous Federal Actions
On February 12, 1985, we listed San Benito evening-primrose as a
threatened species (50 FR 5755-5759) based primarily on the threats
from motorized recreation and active gravel mining. Nine occurrences of
the plant were known at the time, ranging from only 10 to 100
individuals each (50 FR 5755). At the time of listing, we found that
designation of critical habitat was not prudent, and no further action
regarding critical habitat has been taken (50 FR 5757-5759).
Accordingly, we do not address critical habitat in this proposed rule.
A recovery plan for San Benito evening-primrose was published on
September 19, 2006 (71 FR 54837-54838) (Recovery Plan). In the Recovery
Plan, we noted the need to fully map the extent and range of the
species, acknowledging that additional occurrences had been found since
listing in 1985. We also noted that, during 20 years of monitoring
known occurrences, only 2 of those years had produced large numbers of
individuals. This determination led recovery actions to focus heavily
on preserving suitable habitat and the seed bank since target numbers
of individuals were unlikely to be reliable indicators of population
health (USFWS 2006, p. 51).
In 2009, the Service conducted a 5-year review pursuant to 16
U.S.C. 1533(c)(2)(A) to evaluate whether the species' status had
changed since listing in 1985 and publication of the Recovery Plan in
2006 (USFWS 2009, entire). In the 5-year review, we reported an
increase in the number of known sub-occurrences from 53 in 2006 at the
time of the Recovery Plan to 69 in 2009 as well as changes in the
management of OHV use.
We published a notice announcing the initiation of a 5-year review
of the status of San Benito evening-primrose on June 18, 2018 (83 FR
28251-28254). This proposed rule to remove San Benito evening-primrose
from the Federal List of Endangered and Threatened Plants also serves
as a status review for the species.
Supporting Documents
In 2009, a 5-year review was prepared for San Benito evening-
primrose. At the time, the review represented a compilation of the best
scientific and commercial data available concerning the status of the
species, including the impacts of past, present, and future factors
(both negative and beneficial) affecting the species. Where we have
more recent information than was contained in the 5-year review, we
have incorporated it as appropriate into this proposed rule.
I. Proposed Delisting Determination
Background
San Benito evening-primrose is a small, yellow-flowered, annual
species in the evening-primrose family (Onagraceae). The plant is
slender with narrowly elliptic leaves 0.3 inches (in) (7-20 millimeters
(mm)) in length and minutely serrate. The stem may be erect or
decumbent (lying on the ground with the extremity curving upward) and
ranges in height from 1.2 to 7.9 in (3-20 centimeters (cm)) with
branches widely spreading. Petals are 0.1 to 0.2 in (3.5 to 4 mm) and
may fade from yellow to reddish (Wagner 2012, pp. 925-929). San Benito
evening-primrose is autogamous (self-fertilizing) and produces seed
that persists for long periods of time, which creates well-established
seed banks where the species occurs (Taylor 1990, pp. 7-8).
San Benito evening-primrose is known only from the southeastern
portion of San Benito County, the western edge of Fresno County, and
the northeastern edge of Monterey County, largely within the New Idria
serpentinite mass (figure 1). Serpentine is a rock formed from ancient
volcanic activity that results in minerals with a greenish and brownish
appearance such as antigorite, lizardite, and chrysotile. The New Idria
serpentinite mass covers approximately 13,000 hectares (32,124 acres)
and is one of the largest serpentine formations in the southern Coast
Ranges of California (Rajakaruna et al. 2011, p. 698). Average rainfall
in areas occupied by San Benito evening-primrose is 16-17 in (40-42 cm)
annually with temperatures ranging from lows of 21 to 34 degrees
Fahrenheit (F) (-6.7 to -1.1 degrees Celsius (C)) in the winter to
highs of 90 to 100 degrees F (32.2 to 37.8 degrees C) in the summer
(USFWS 2009, p. 8). Occupied habitat of San Benito evening-primrose
occurs primarily on land managed by the Bureau of Land Management (BLM)
(36.5 acres), as well as on private land (26.6 acres).
[[Page 33063]]
[GRAPHIC] [TIFF OMITTED] TP01JN20.004
San Benito evening-primrose occurs at elevations between 1,969 to
3,938 feet (ft) (600 and 1,200 meters (m)) on alluvial terraces and
upland geologic transition zones containing sandy to gravelly
serpentine derived soil, but may also be found on greywacke, chert, and
syenite derived soils (Raven 1969, pp. 332-333, Taylor 1990, pp. 24-36,
39-42, BLM 2018, pp. 17-19). Alluvial terrace habitat is characterized
by serpentine soils that are deeper and better developed than
neighboring slopes, generally flat (<3 degrees slope), and contain less
than 25 percent cover of chaparral or woody vegetation (Taylor 1990,
pp. 69, 71-72, USFWS 2006, p. 13). Geologic transition zone habitat is
characterized by sandy soils within uplands on slopes between 15
degrees and 60 degrees as well as rock outcrops and talus (Dick et al.
2014, p. 167, BLM 2018, p. 18). The transition zone that the habitat
type refers to is the boundary between serpentine masses and non-
serpentine rock (BLM 2014, pp. 110-112). Generally, alluvial habitat is
found closer to water and in association with Quercus durata (leather
oak), Arctostaphylos spp. (manzanita), Pinus jeffreyi (Jeffrey pine),
P. sabiniana (bull pine), and P. coulteri (Coulter pine). Geologic
transition zone habitat is found far from water and in association with
Q. douglassii (blue oak), Juniperus californicus (California juniper),
and Q.
[[Page 33064]]
berberidifolia (scrub oak) (Dick et al. 2014, p. 167).
The BLM first identified the geologic transition zone habitat type
in 2009 through surveys of potential habitat and known occurrences of
San Benito evening-primrose. The discovery of the new habitat type, and
associated new occurrences, increased the number of known point
locations from 69 in 2009 to 658 in 2018 (BLM 2018, p. 32). The
difference between geologic transition zone habitat and alluvial
terrace habitat suggested the possibility that there were two
genetically distinct lineages of San Benito evening-primrose or that
the species may be hybridizing with the close relatives plains evening
primrose (C. contorta) and sandysoil suncup (C. strigulosa). However,
it was determined that hybridization was not occurring and that
watersheds and habitat type did not explain any genetic differences
that were identified (Dick et al. 2014, entire). The findings suggest
that the known occurrences of San Benito evening-primrose are all part
of the same genetic population (Dick et al. 2014, entire).
The BLM has been conducting surveys for San Benito evening-primrose
since 1980 within the Clear Creek Management Area, where the majority
of sub-occurrences are located. The surveys conducted by the BLM have
resulted in an increase in the understanding of the range of the
species, habitat preferences, life history, and numbers (BLM 2018,
entire). The monitoring has resulted in the identification of 658 point
locations occurring within and outside of the boundary of the Clear
Creek Management Area (CCMA), including a substantial number on private
land (5 known point locations in 2009 and 290 known point locations in
2018). The species' current known range is bordered on the north by New
Idria Road near the confluence of Larious Creek and San Carlos Creek,
to the South at the Monterey County Line near Lewis Creek, to the west
near the Hernandez Reservoir, and to the east by the eastern boundary
of the serpentine area of critical environmental concern (ACEC), an
area of approximately 307 square miles. The BLM's ACEC designations
highlight areas where special management attention is needed to protect
important historical, cultural, and scenic values, or fish and wildlife
or other natural resources. ACECs can also be designated to protect
human life and safety from natural hazards. The known occurrences cover
64 ac (26 ha) of public and private land, and potential suitable
habitat is currently estimated at 260 ac (105 ha) (BLM 2018, p. 31).
The findings of the BLM have been documented in annual reports from
2009 to 2018 and are the source of the most recent information
regarding the status of the occurrences of San Benito evening-primrose.
This document presents data that was provided by the BLM within the
2018 Annual Report (BLM 2018, entire) and from spatial data provided by
the BLM in 2018. Within this report a single ``occurrence'' refers to
areas where San Benito evening-primrose has been mapped. Mapped areas
within 0.25 mi (0.4 km) of each other, but discontinuous, are
considered a single occurrence consisting of multiple sub-occurrences.
The BLM has recorded point data, in addition to polygon sub-occurrences
for San Benito evening-primrose, which are referred to as point
locations in this report. Point locations are mapped point features
while sub-occurrences are mapped polygon features. In 2018, 79
occurrences, consisting of 519 sub-occurrences, and 658 point locations
were mapped by the BLM (table 1) (BLM 2018, p. 32; BLM 2018, spatial
data).
Table 1--2018 BLM Survey Results
----------------------------------------------------------------------------------------------------------------
Number of Number of sub- Number of point
occurrences occurrences locations Acres (hectares)
----------------------------------------------------------------------------------------------------------------
2018 San Benito evening-primrose 79 519 658 63.2 (25.6)
(Camissonia benitensis) survey
results........................
----------------------------------------------------------------------------------------------------------------
Occurrences consist of sub-occurrences (mapped polygons) within 0.25 mile of each other. Point locations are
reported in the 2018 Annual Report (BLM 2018 p. 32). Acreage data are derived from the spatial extent of the
mapped occurrences.
The BLM compared historical occurrence data to their point location
counts in their annual reports, and Service used those comparisons in
the Recovery Plan (USFWS 2006, entire) and 5-Year Review (USFWS 2009,
entire). Here, we have chosen to update the occurrence organization
because the numbers of occurrences, sub-occurrences, and point
locations have increased dramatically since 2009. Table 1 illustrates
the nested nature of the way the data are presented. When possible we
use the same terminology as previous reports.
Recovery and Recovery Plan Implementation
Section 4(f) of the Act directs us to develop and implement
recovery plans for the conservation and survival of endangered and
threatened species unless we determine that such a plan will not
promote the conservation of the species. Under section 4(f)(1)(B)(ii),
recovery plans must, to the maximum extent practicable, include:
``[O]bjective, measurable criteria which, when met, would result in a
determination, in accordance with the provisions of [section 4 of the
Act], that the species be removed from the list.'' However, revisions
to the list (adding, removing, or reclassifying a species) must reflect
determinations made in accordance with sections 4(a)(1) and 4(b) of the
Act. Section 4(a)(1) requires that the Secretary determine whether a
species is an endangered species or threatened species (or not) because
of one or more of five threat factors. Section 4(b) of the Act requires
that the determination be made ``solely on the basis of the best
scientific and commercial data available.'' Therefore, recovery
criteria should help indicate when we would anticipate that an analysis
of the species' status under section 4(a)(1) would result in a
determination that the species is no longer an endangered species or
threatened species.
Thus, while recovery plans provide important guidance to the
Service, States, and other partners on methods of minimizing threats to
listed species and measurable objectives against which to measure
progress towards recovery, they are not regulatory documents and cannot
substitute for the determinations and promulgation of regulations
required under section 4(a)(1) of the Act. A decision to revise the
status of or remove a species from the Federal List of Endangered and
Threatened Plants (50 CFR 17.12) is ultimately based on an analysis of
the best scientific and commercial data then available to determine
whether a species meets the definition of an endangered species or a
threatened species, regardless of whether that information differs from
the recovery plan. Below, we summarize
[[Page 33065]]
the recovery plan goals and discuss progress toward meeting the
recovery objectives and how they inform our analysis of the species'
status and the stressors affecting it.
The Recovery Plan (USFWS2006, pp. 48-74) describes the recovery
goal and criteria that need to be achieved in order to consider
removing San Benito evening-primrose from the Federal List of
Endangered and Threatened Plants. We summarize the goal and then
discuss progress toward meeting the recovery criteria in the following
sections.
Recovery Goal
In the Recovery Plan, the stated goal is to restore occurrences of
San Benito evening-primrose so that they are self-sustaining and
protected from future threats (USFWS 2006, p. 51). This goal is broadly
evaluated through trends in the observed numbers of individuals
indicated by annual monitoring, the abundance and distribution of
suitable habitat, evaluation of the seed bank, and the effectiveness of
protective measures that have been implemented to reduce threats from
human activities such as mining, OHV use, and other recreational
activity (USFWS2006, pp. 51-52). In order to evaluate threats to the
species we must consider potential impacts within the foreseeable
future. The Recovery Plan (USFWS 2006, entire) uses 20 years as the
appropriate period of time to evaluate population stability because the
number of individuals fluctuates widely from year to year and a longer
monitoring time will better reflect changes in trends despite this
variation (USFWS 2006, p. 51, 53). Given this and information on
potential threats into the future, in this proposed rule we have
adopted 20 to 30 years as the foreseeable future to evaluate potential
threats and the species' responses to those threats.
Recovery Criteria
The Recovery Plan identified five criteria for removing San Benito
evening-primrose from the Federal List of Endangered and Threatened
Plants (USFWS 2006, pp. 52-54):
(1) Research has evaluated the possibility for restoration of
suitable habitat and the natural rate of the replacement of suitable
habitat (i.e., succession from open habitat to woody vegetation), the
ecology of the seedbank, and population viability modeling. The results
of completed research, and any other research that was conducted,
should inform all other recovery criteria suggested by the Recovery
Plan and are listed below.
(2) Known occurrences and sufficient additional suitable habitat
within each watershed unit throughout its range are protected from
direct effects from OHV use and other recreational activities.
Appropriate levels of compliance with use regulations by recreationists
have prevented adverse impacts to San Benito evening-primrose
occurrences and habitat.
(3) Currently occupied and suitable habitat for the species has
been restored and maintained over an appropriate period of time, as
informed by monitoring and research. Twenty years was estimated as
``the appropriate period of time'' in the Recovery Plan (USFWS 2006, p.
53). The Recovery Plan emphasizes maintaining suitable habitat and more
precisely defining the requirements of suitable habitat. Additionally,
disturbance and erosion rates should not be elevated above natural
levels and the seed bank should be evaluated for continued persistence,
as above-ground numbers of individuals are known to fluctuate widely
from year to year.
(4) Population sizes have been maintained over a monitoring period
that includes multiple rainfall cycles (successive periods of drought
and wet years). The Recovery Plan states that the trend of above-ground
counts of species should be stable or increasing and defines non-
drought years as those with greater than 15 in (38 cm) of rainfall from
October through April at the Priest Valley weather station.
(5) A post-delisting monitoring plan for San Benito evening-
primrose has been developed.
Achievement of Recovery Criteria
Criterion 1: Research has been completed.
Research to increase the understanding of the extent of existing
occurrences, the range of suitable habitat, the persistence of the seed
bank, and analysis of the genetic variability across watersheds and
habitat types have been undertaken since listing in 1985 (Taylor 1990,
entire; BLM 2010, entire; BLM 2014, entire; BLM 2015, entire; BLM 2018,
entire; Dick et al. 2014, entire).
Habitat Suitability. Research conducted in 1990 (Taylor 1990,
entire) provided the first comprehensive overview of the ecology of San
Benito evening-primrose that established the initial understanding for
the requirements of suitable habitat for the species, the species' life
history, including early examination of the seed bank and germination
characteristics, and the known distribution of the species as well as
threats to the known occurrences. From 1990 through 2010, San Benito
evening-primrose was thought to be restricted to alluvial terrace
habitat that was characterized by relatively deep and well-developed,
serpentine-derived soils on flat ground (compared to nearby barren
serpentine slopes), association with ephemeral or intermittent streams,
and open habitat lacking woody vegetation (Taylor 1990, pp. 39-40). In
2010, the BLM identified a second type of habitat, termed the
``geologic transition zone,'' that was suitable for San Benito evening-
primrose (BLM 2010, pp. 8-16). The geologic transition zone was
characterized by relatively steeper slopes (0-~60 degrees) of uplands
on serpentine soils at the interface with non-serpentine soils.
Geologic transition zone habitat is not topographically constrained to
the toe of slopes, whereas alluvial stream terrace habitat is. From the
time of listing through 2018, the BLM conducted extensive surveys
within these habitat types, which led to the discovery and
documentation of over 600 new point locations. The results indicated
that the majority of both occupied and potential habitat is greatest
within the geologic transition zone type (BLM 2018, p. 32). The new
sub-occurrences identified within the geologic transition zone habitat
are relatively undisturbed in comparison to the highly disturbed sites
of the initial locations known from alluvial stream terraces (BLM 2010,
p. 11). The majority of new point locations are found outside of the
historical areas used by OHVs and as a result have not been subjected
to the same levels of disturbance. Approximately one-third to half of
the currently known occurrences exist on private land outside of the
Clear Creek Management Area (table 2, table 3) (BLM 2018, p. 33).
Seed Bank Analysis. Our understanding of the role of the seed bank
in the life history of San Benito evening-primrose has similarly
increased due to research efforts. The number of viable seeds within
the seed bank was often many times greater than the above-ground
expression in any given year--including those years in which there was
a large above-ground expression (Taylor 1990, p. 57). The size of the
seed bank at existing locations was reevaluated in 2010 by the BLM (BLM
2011, pp. 36-42). The BLM found that there were 519 times as many seeds
as emergent plants when averaged across 67 sub-occurrences in 2010,
emphasizing that the size of the seedbank is much greater than the
total number of observed individuals in a given year. Maintaining a
large amount
[[Page 33066]]
of seed within the soil is a common strategy for short-lived annuals in
habitats with frequent disturbance because the persistent seed bank
buffers against stochastic environmental events such as drought (Kalisz
and McPeek 1993, pp. 319-320; Fischer and Matthies 1998, pp. 275-277;
Adams et al. 2005, p. 434). In species that develop large seed banks,
it is not uncommon to see no above-ground expression one year and to
see a large expression the following year, and this pattern has been
well-documented with San Benito evening-primrose (BLM 2018, p. 11).
Disturbance Ecology. Frost heaving (the expansion and contraction
of water within the soil during freeze-thaw cycles), small mammal soil
disturbance (e.g., gopher burrowing), sediment movement from adjacent
slopes, and erosion from stream flows were identified as the primary
sources of natural disturbance experienced by San Benito evening-
primrose (Taylor 1990, pp. 39-42, 57). Quantifiable measures of erosion
(natural or anthropogenic) and a scale to measure disturbance severity
and persistence, as well as the corresponding effect to San Benito
evening-primrose and associated species, have not been developed. While
San Benito evening-primrose tolerates, and is adapted to, disturbance
from natural processes, anthropogenic disturbances from activities such
as mining, road and building construction, and OHV use are much more
severe and may lead to loss of habitat through soil removal, soil
compaction, and increased rates of erosion (BLM 2010, p. 29, Snyder et
al. 1976, pp. 29-30, Brooks and Lair 2005, p. 7, Groom et al. 2007, pp.
130-131, Lovich and Bainbridge 1999, pp. 315-317, Switalski et al.
2017, p. 88). Alluvial terrace habitat that was greater than 50 percent
disturbed from OHV use was considered to be unsuitable for San Benito
evening-primrose (Taylor 1990, p. 71; USFWS 2006, p. 13). Geologic
transition zone habitat was not considered here because it had not yet
been recognized as suitable habitat, but tends to have less OHV
disturbance than alluvial terrace habitat. The seed bank of San Benito
evening-primrose is very large, and the amount of seed present is many
times greater than the amount of individuals that germinate in any
given year (Taylor 1990, p. 57, BLM 2011, pp. 33-42). Additionally, the
BLM found that the majority of the existing seed bank is found within
the top 1 to 3 in (4 to 8 cm) of soil (BLM 2013, pp. 19-34). As a
result, any damage to, or loss of, the top layer of soil has the
potential to negatively affect the ability of the species to persist
through time.
Recolonization. Natural rates of recolonization of native flora in
arid environments following disturbance have been estimated to be
between 65-76 years for a return to predisturbance cover of annuals and
perennials, and from 148-215 (and greater) years for a return to
predisturbance species composition and cover (Abella 2010, pp. 1,258-
1,260, Berry et al. 2015, pp. 149-150). Persistent OHV use reduced the
number of Astragalus magdalenae var. peirsonii (Peirson's milk-vetch)
by 4-5 times the amount of comparable undisturbed areas (Groom et al.
2006, pp. 126-127). The reduction in mature individuals led to a
decrease in the amount of seeds produced and suggested that persistent
impacts from OHVs over extended periods of time may result in the
depletion of the existing seedbank (Groom et al. 2006, pp. 131-132). We
can use this information as an indicator of how San Benito evening-
primrose recolonization may be similarly affected by OHV.
The Recovery Plan recommends target numbers of individuals for a
sub-set (27) of the known occurrences of San Benito evening-primrose
(USFWS 2006, pp. 56-58). These occurrences also generally have the
longest record of survey data and include the initial occurrences
described in Taylor (1990, entire). Data from the BLM indicate that,
despite cessation of OHV use in 2008, the number of individuals
observed annually at these occurrences has not increased and may be
decreasing (figure 2). The 5-year moving average indicates a decrease
in the average number of individuals from 1988 through 1993 followed by
stable to slightly increasing numbers of individuals. However, 1988 was
an abnormal year, and the number of individuals counted during surveys
was significantly greater than any other recorded year. The abnormally
high numbers of individuals identified that year have a large effect on
the observed trend in annual number of individuals. These data are
consistent with available literature that suggests that a return to
predisturbance conditions likely occurs on time scales of greater than
65-76 years and possibly even greater than 150 years.
[[Page 33067]]
[GRAPHIC] [TIFF OMITTED] TP01JN20.005
Population Genetics. The occurrences of San Benito evening-primrose
that the BLM began finding within geologic transition zone habitat were
at first thought to be genetically distinct from occurrences within
alluvial terrace habitat. The new occurrences were also located within
different watersheds from the first known occurrences, and there was
some question as to whether or not the species may be hybridizing with
a close relative, Camissonia strigulosa (contorted primrose). If the
occurrences were genetically distinct, recovery actions, such as
restoration of degraded habitat and out-planting efforts, would need to
be identified for each habitat type. There were three distinct genetic
clusters of San Benito evening-primrose found but none of the genetic
clusters coincided with type of habitat or watershed (Dick et al. 2014,
entire). Additionally, the same study found no evidence of
hybridization between San Benito evening-primrose and contorted
primrose. Because the genetic diversity identified within the
occurrences was widespread and uncorrelated with habitat and watershed,
future out-planting efforts would not need to be restricted to genetic
type. The study instead concluded that seed from different occurrences
should be mixed to increase diversity across the entire geographic
range. In summary, research to increase the understanding of the extent
of existing occurrences, the range of suitable habitat, the persistence
of the seed bank, and analysis of the genetic variability across
watersheds and habitat types have been undertaken fulfilling recovery
criterion 1.
Criterion 2: Known occurrences and sufficient additional suitable
habitat within each watershed unit throughout its range are protected
from direct effects from OHV use and other recreational activities.
Wire fencing, steel pipe barriers, signage, and enforcement of
trail restrictions were used to protect San Benito evening-primrose and
suitable habitat prior to the 2006 amendment to
[[Page 33068]]
the Resource Management Plan. The 2006 amendment to the Resource
Management Plan closed to OHVs all areas not marked for limited or open
use. This restricted the total OHV use area to 242 miles (390 km) of
OHV trails and directed OHV use away from areas that provided suitable
habitat for, or were occupied by, San Benito evening-primrose (BLM 2006
p. 3-1). By 2009, non-compliance with the 2006 Resource Management Plan
had declined (BLM 2008, pp. 5-9; USFWS 2009, pp. 19-21). In 2008, the
EPA issued a report concluding that exposure to naturally occurring
asbestos during recreational activities, including OHV use, was higher
than the acceptable risk range for causing cancer within the CCMA (EPA
2008, p. 6-3). The level of exposure to asbestos varied with
recreational activity and participant age, but was significant enough
to warrant an emergency temporary closure of the CCMA (BLM 2008, p. 2).
Although not the intent, the closure effectively temporarily protected
all known occurrences of San Benito evening-primrose from OHV
disturbance. The temporary closure remained in place until the 2014
amendment to the Resource Management Plan was adopted (BLM 2014,
entire). The 2014 Resource Management Plan further restricted OHV
access to areas of suitable habitat and known sub-occurrences of San
Benito evening-primrose by reducing the amount of open trails and
restricting access to the Serpentine Area of Critical Environmental
Concern (ACEC) to 5 days per year per recreationalist through a permit
system and a series of locked gates (BLM 2014, pp. 1-18).
The BLM has conducted OHV non-compliance monitoring as part of the
annual San Benito evening-primrose surveys since 2008 and the initial
closure of the Serpentine ACEC (table 2). During this time non-
compliance has remained relatively low with the number of point
locations or potential habitat being impacted by OHV ranging from 2 to
11 locations in a given year. The amount of disturbance within each
area has been observed to be low, and natural recovery was observed.
Upper Clear Creek, Larious Canyon, and San Carlos Creek are areas of
repeated non-compliance despite annual repairing of fencing and
barriers and issuance of citations for violating the closures when
users are caught (BLM 2013, p. 5, BLM 2015, p. 6). The intensity of
non-compliance varied from heavy (greater than 10 tracks observed) to
moderate or low (less than 10 tracks observed). The BLM assumes that
non-compliant OHV use originates from private land adjacent to the
CCMA.
Table 2--Summary of Off-Highway Vehicle Non-Compliance Within the Serpentine Area of Critical Environmental Concern 2008 Through 2016
--------------------------------------------------------------------------------------------------------------------------------------------------------
Number of point
locations with Minimum number of Max number of Average number of
Year * observed non- tracks tracks tracks Reference
compliance
--------------------------------------------------------------------------------------------------------------------------------------------------------
2008........................................ 6 NA NA NA BLM 2008 pp. 8-9.
2009........................................ 3 NA NA NA BLM 2010 p. 5.
2010........................................ 2 2 10+ 2 BLM 2011 pp. 12-13.
2012........................................ 11 1 10+ 7 BLM 2012 p. 5.
2013........................................ 10 1 10+ 8 BLM 2013 p. 5.
2014........................................ 9 1 10+ 5 BLM 2015 p. 6.
2015........................................ 8 1 10+ 7 BLM 2017 pp. 6-7.
2016........................................ 6 1 10+ 8 BLM 2017 p. 8.
--------------------------------------------------------------------------------------------------------------------------------------------------------
* No data available for 2011, 2017, 2018. Minimum, maximum, and average number of tracks observed were not available for the 2008 and 2009 survey
seasons.
By 2014, the number of known point locations of San Benito evening-
primrose had grown to 500 with the majority occurring within the
geologic transition zone habitat. Approximately half of those locations
were protected from OHV use due to the restrictions imposed by the 2014
Resource Management Plan (BLM 2014, pp. 1-18; BLM 2015, pp. 7-16). By
2018, 658 point locations of San Benito evening-primrose had been
mapped by the BLM (BLM 2018, pp. 32-47). The 658 point locations
correspond to 79 occurrences consisting of 519 sub-occurrences and
covering 63.2 acres (25.6 ha) (table 1, figure 1). Twenty-three
occurrences (81 sub-occurrences) are located within the Serpentine ACEC
and are effectively protected from OHV use due to the 2014 Resource
Management Plan (BLM 2018, p. 33) (table 3). There are 36 occurrences
(260 sub-occurrences) within BLM-managed land outside of the Serpentine
ACEC. OHV use within the CCMA, but outside of the Serpentine ACEC, has
been designated as ``limited,'' meaning that motorized use is
restricted to highway-licensed vehicles and ATVs and utility task
vehicles on designated routes only (BLM 2014, pp. 1-13 through 1-14).
Forty-five occurrences (178 sub-occurrences) are known to occur on
private land that are not subject to management by the BLM or other
Federal agencies (table 3, table 4).
When the recovery plan criteria were written, there were 27 known
occurrences. Twenty- three of those occurrences were on land managed by
the BLM, and four were on private property. Currently, there are 59
occurrences on BLM-managed land and 45 occurrences on private property.
Although protections for the occurrences on private land cannot be
guaranteed, the number of occurrences on land managed by the BLM has
exceeded the goal of Recovery Criterion 2 through discovery of new
occurrences.
Table 3--Number of Occurrences, Sub-Occurrences, and Acreage of Mapped San Benito Evening-Primrose (Camissonia
benitensis) Locations by Land Manager (2018)
----------------------------------------------------------------------------------------------------------------
Number of Number of sub-
occurrences occurrences Acres
----------------------------------------------------------------------------------------------------------------
BLM.................................................... 36 260 23.8
ACEC................................................... 23 81 12.7
[[Page 33069]]
Private................................................ 45 178 26.6
----------------------------------------------------------------------------------------------------------------
Occurrences consist of sub-occurrences (mapped polygons) within 0.25 mile of each other. Point locations are
reported in the 2018 Annual Report (BLM 2018 p. 32). Acreage data are derived from the spatial extent of the
mapped occurrences. Note that occurrences that encompass multiple property owners may be counted twice because
of how the mapped data are nested.
The majority of the known occurrences and sub-occurrences occur
within the geologic transition zone identified by the BLM as habitat in
2010 (table 4). Occurrences of San Benito evening-primrose within
geologic transition zone habitat are assumed to be less likely to be
affected by OHV recreation since OHV riders have historically preferred
the terrain associated with alluvial terrace habitat (BLM 2010, p. 11).
In summary, known occurrences and sufficient additional suitable
habitat within each watershed unit throughout its range are protected
from direct effects from OHV use and other recreational activities,
fulfilling recovery criterion 2.
Table 4--Number of Known Occurrences and Sub-Occurrences by Land Manager and Habitat Type
--------------------------------------------------------------------------------------------------------------------------------------------------------
Alluvial terrace habitat Geologic transition zone habitat
-----------------------------------------------------------------------------------------------------
Number of Number of sub- Number of Number of sub-
occurrences occurrences Acres occurrences occurrences Acres
--------------------------------------------------------------------------------------------------------------------------------------------------------
BLM............................................... 17 104 6.7 19 156 17.2
ACEC.............................................. 6 37 3.0 17 44 9.7
Private........................................... 10 26 0.6 35 152 26.0
-----------------------------------------------------------------------------------------------------
Total......................................... 33 167 10.3 71 352 53.0
--------------------------------------------------------------------------------------------------------------------------------------------------------
Occurrences consist of sub-occurrences (mapped polygons) within 0.25 mile of each other. Point locations are reported in the 2018 Annual Report (BLM
2018 p. 32). Acreage data are derived from the spatial extent of the mapped occurrences. Note that occurrences that encompass multiple property owners
may be counted twice because of how the mapped data are nested.
Criterion 3: Currently occupied and suitable habitat for the
species has been restored and maintained over an appropriate period of
time, as informed by monitoring and research.
In the Recovery Plan, 20 years was identified as the appropriate
period of time to conduct and evaluate the success of restoration
activities. Twenty years was chosen to allow enough time for
observations of natural and restored occurrences during non-drought
years to be made in order to evaluate the stability of San Benito
evening-primrose occurrences (USFWS 2006, pp. 53-54). Thirty-three
years have passed since San Benito evening-primrose was listed by the
Service as a threatened species. Restoration began prior to listing by
using fencing to discourage disturbance by OHVs (Taylor 1990, pp. 24-
36, 71). The BLM has continued to implement passive restoration
measures such as installation of additional wire fencing and steel pipe
barriers to reduce OHV trespass and signage to promote awareness of the
natural resources (BLM 2018 pp. 50-56). Photopoint monitoring has
demonstrated an increase in the amount of woody vegetation cover in
previously open and disturbed areas. The increase in woody vegetation
cover suggests that fencing and other barriers have been effective in
reducing ground disturbance from OHV use prior to the temporary closure
in 2008 and the permanent restrictions in 2014.
Seed of San Benito evening-primrose was introduced between 1990 and
1991 at six areas near existing point locations. At five of the
reintroduction sites, 30,000 seeds were broadcast into areas that were
each 2,153 ft\2\ (200-300 m\2\) in area. Sixty thousand seeds were
broadcast into the sixth site (BLM 2013, Excel data, Taylor 1993, p.
14). Very few plants, relative to the amount of seed reintroduced, were
observed (between 3 and 147 plants) in the years immediately following
the seeding. It has been determined that San Benito evening-primrose
establishment from artificially sown seed is very low and that seeding
introduction is not likely to be a successful restoration tool (Taylor
1993, p. 14). The areas where seed was introduced have continued to
have small numbers of individuals observed each year. Approximately
3,000 seeds were sown in 2008 and 2012 in areas where San Benito
evening-primrose had not been observed but where potential habitat
existed that could support new occurrences. The number of individuals
at these areas have remained similarly low ranging from 0 to 320
individuals in a single year (BLM 2018, pp. 34-47).
Restoration of five staging areas located on stream terraces that
were heavily degraded from OHV use and mining (prior to 1939) was
completed in 2010 (BLM 2011, pp. 4-10). The staging areas were
characterized by a mix of lack of vegetation, soil compaction, buried
original soil surface, debris from facilities, and erosion on adjacent
hillslopes. A total of 2.01 ac (0.81 ha) of San Benito evening-primrose
habitat was restored. Annual counts of San Benito evening-primrose at
each of the staging areas and associated sub-occurrences have indicated
that the number of individuals in any given year fluctuates greatly
(BLM 2018, pp. 34-47). Staging areas 1, 4, and 5 have relatively stable
annual counts, while staging areas 2 and 3 have had more variable, and
possibly slightly declining, annual counts.
The BLM has also undertaken efforts to improve watershed quality by
identifying the most appropriate species and methods to restore
streambanks (BLM 2011, pp. 10-12). While the immediate stream banks are
not suitable habitat for San Benito evening-primrose, restoring natural
hydrology and maintaining bank composition can reduce sedimentation and
erosion in the watershed that indirectly supports the persistence of
San Benito evening-primrose habitat. The BLM found that revegetation of
degraded streambanks
[[Page 33070]]
using sod of Agrostis exarata (spike bentgrass) was most effective.
Additionally, six vehicle routes were closed and restored by removing
access and ripping the compacted soil (BLM 2011 p. 10). In summary,
currently occupied and suitable habitat for the species has been
restored and maintained over an appropriate period of time, as informed
by monitoring and research, fulfilling recovery criterion 3.
Criterion 4: Population sizes have been maintained over a
monitoring period that includes multiple rainfall cycles (successive
periods of drought and wet years).
The Recovery Plan recommended a target average number of
individuals for 27 occurrences of San Benito evening-primrose (USFWS
2006, pp. 54-58; BLM 2018, pp. 34-35). The target counts were based on
past observations of the number of individuals observed during
favorable years and were considered to be approximate. Four of the 27
locations with a target number of individuals had an average annual
count that met or exceeded the target levels between 1983 and 2017
(USFWS 2006, pp. 56-58; BLM 2018, pp. 34-35; USFWS Review of BLM
reporting data). Five of the 27 locations had an annual average count
that met or exceeded the target number of individuals when only years
with normal precipitation are considered. We consider the average
number of individuals because the number of individuals at any given
site fluctuate greatly from year to year causing single year counts to
be inaccurate measures of the stability of the species (figure 2).
The total annual number of individuals for the same 27 sites has
fluctuated around a mean of approximately 9,600 individuals since 1983
(Figure 2). Over time, a slight decrease in the species count is
observable, but is small enough to be affected by a single year's
count. The slight negative trend is due to a significantly above-
average year in 1988 where the total number of individuals observed was
an order of magnitude greater than during any other annual count. The
5-year moving average indicates a decrease in the average number of
individuals from 1988 through 1993, followed by stable to slightly
increasing numbers of individuals. We also recognize that only those
occurrences that were known by 2006, and had suggested target numbers
of individuals, are represented in the 27 locations. This does not take
into consideration the majority of currently known occurrences.
Evaluating the trend of each of the 79 occurrences (658 point
locations, see table 1) is not feasible because census data for the
entirety of known point locations are not available.
The target number of individuals has not been met for 23 of the 27
occurrences with target criteria. However, the target numbers were
estimates and the lack of a consistent decline in mean annual counts
suggest that, while the occurrences are not increasing in abundance of
San Benito evening-primrose, they are not threatened with extinction.
The lack of decline in number of individuals over a 27-year monitoring
period and an increase in the number of known occurrences indicate that
the criteria of maintaining population numbers over an appropriate
period of time has been met.
Criterion 5: A post-delisting monitoring plan for the species has
been developed.
Section 4(g)(1) of the Act requires us, in cooperation with the
States, to implement a system to monitor effectively, for not less than
5 years, all species that have been recovered and delisted (50 CFR
17.11, 17.12). The purpose of this post-delisting monitoring is to
verify that a species remains secure from risk of extinction after it
has been removed from the protections of the Act. The monitoring is
designed to detect the failure of any delisted species to sustain
itself without the protective measures provided by the Act. If, at any
time during the monitoring period, data indicate that protective status
under the Act should be reinstated, we can initiate listing procedures,
including, if appropriate, emergency listing under section 4(b)(7) of
the Act. Section 4(g) of the Act explicitly requires us to cooperate
with the States in development and implementation of post-delisting
monitoring programs, but we remain responsible for compliance with
section 4(g) and, therefore, must remain actively engaged in all phases
of post-delisting monitoring. We also seek active participation of
other entities that are expected to assume responsibilities for the
species' conservation post delisting.
Post-delisting Monitoring Guidelines. Post-delisting monitoring is
designed to verify that San Benito evening-primrose remains secure from
risk of extinction after delisting by detecting changes in trend that
indicate that the known occurrences have become unstable and/or are at
risk of becoming once again threatened or endangered. The Act has a
minimum post-delisting monitoring requirement of 5 years, but a longer
period of time may be necessary to account for fluctuations in counts
from year to year, potential changes in land use, and climatic
variability. If a decline in abundance or a substantial new threat
arises, post-delisting monitoring may be extended or modified and the
status of the species will be reevaluated. The Service is responsible
for establishing a final post-delisting monitoring plan. As the sole
Federal entity that manages land where San Benito evening-primrose
occurs, the BLM will contribute expertise for development and
implementation of the final post-delisting monitoring plan. The draft
post-delisting monitoring plan can be found at https://www.regulations.gov in Docket No. FWS-R8-ES-2019-0065. The Service
intends to work with the BLM to finalize the post-delisting monitoring
plan upon publication of this proposed rule.
Summary of Recovery Criteria
Research and survey efforts have clarified the distribution,
extent, and habitat characteristics of San Benito evening-primrose. The
seed bank has been demonstrated to be prolific and an integral part of
the species' ecology in responding to, and persisting through, negative
stochastic events. A genetic evaluation of the newly identified sub-
occurrences have shown that there is no genetic distinction based upon
habitat type or watershed among the different sub-occurrences. Existing
research has resulted in a better understanding of the species' ecology
and has shown an increase in the species' range, suitable habitat, and
number of occurrences. With the currently completed research, the
intent of the first recovery criteria has been met.
The second recovery criteria has been achieved through the 2014
Resource Management Plan, which restricted OHV access to areas of
suitable habitat and known sub-occurrences of San Benito evening-
primrose by reducing the amount of open trails and restricting access
to the Serpentine ACEC to 5 days per year per recreationalist through a
permit system and a series of locked gates (BLM 2014, pp. 1-18). The
identification of a new habitat type, the geologic transition zone, and
numerous new point locations have increased the known range and amount
of known occupied habitat. The topography and composition of geologic
transition zone habitat is not typical of areas preferred by OHV users,
and many of the new occurrences of San Benito evening-primrose were not
subject to OHV disturbance. As a result, the majority of the currently
known occurrences of San Benito evening-primrose have not been
disturbed from OHV use. The existing Resource Management Plan (BLM
2014, entire) will continue to provide protection for San Benito
evening-
[[Page 33071]]
primrose occurrences within the Serpentine ACEC and the CCMA through
trail restrictions and a permitting system. The Post-delisting
Monitoring Plan will provide guidelines for evaluating the species
following delisting to detect substantial declines that may lead to
consideration of reclassification to threatened or endangered. Changes
in land use will still be subject to State and Federal environmental
review.
Annual monitoring of 27 locations of San Benito evening-primrose
listed in the Recovery Plan have shown that numbers of individuals at
historically occupied habitat have remained relatively stable. Active
and passive restoration efforts undertaken by the BLM, in conjunction
with the closure of the Serpentine ACEC to OHV use, have improved
degraded areas into suitable habitat for San Benito evening-primrose.
The reduction in OHV use described in the 2014 Resource Management Plan
provided protection of occupied habitat within the CCMA, and continued
prohibition on OHV use will ensure that future degradation of occupied
habitat will not occur within the CCMA. The Recovery Plan suggested
target numbers of individuals that could be used as a point of
reference to assess the stability of San Benito evening-primrose. Those
goals have been met for four (five if only normal precipitation years
are considered) of the 27 locations that are listed in the Recovery
Plan. Those values were considered an approximation, and it appears
that the 27 locations listed in the Recovery Plan have remained
relatively stable around a 5-year moving average when the abnormally
high-count year (1988) is considered (figure 2). Furthermore, the 27
locations are no longer representative of the entire range of San
Benito evening-primrose due to the discovery of the geologic transition
zone as suitable habitat and the associated increase in the known total
number of individuals and occupied acreage.
Therefore, we conclude that based on the best available
information, the recovery criteria in the Recovery Plan have been
achieved and the recovery goal identified in the Recovery Plan has been
met for San Benito evening-primrose. Recovery criterion 1 has been met
with research to increase the understanding of the extent of existing
occurrences, the range of suitable habitat, the persistence of the seed
bank, and analysis of the genetic variability across watersheds and
habitat types. Recovery criterion 2 has been met with protection of
known occurrences and sufficient additional suitable habitat within
each watershed unit throughout its range. Recovery criteria three and
four have been met through the closure of the Serpentine ACEC,
restoration of degraded areas, and observed stability of 27 of the 79
occurrences over a period that included 18 years of normal rainfall
over a 27-year period. Recovery criterion 5 has been met through the
development of a draft post-delisting monitoring plan for the species,
which will be finalized in collaboration with the BLM.
Regulatory and Analytical Framework
Regulatory Framework
Section 4 of the Act (16 U.S.C. 1533) and its implementing
regulations (50 CFR part 424) set forth the procedures for determining
whether a species is an ``endangered species'' or a ``threatened
species.'' The Act defines an endangered species as a species that is
``in danger of extinction throughout all or a significant portion of
its range,'' and a threatened species as a species that is ``likely to
become an endangered species within the foreseeable future throughout
all or a significant portion of its range.'' The Act requires that we
determine whether any species is an ``endangered species'' or a
``threatened species'' because of any of the following factors:
(A) The present or threatened destruction, modification, or
curtailment of its habitat or range;
(B) Overutilization for commercial, recreational, scientific, or
educational purposes;
(C) Disease or predation;
(D) The inadequacy of existing regulatory mechanisms; or
(E) Other natural or manmade factors affecting its continued
existence.
These factors represent broad categories of natural or human-caused
actions or conditions that could have an effect on a species' continued
existence. In evaluating these actions and conditions, we look for
those that may have a negative effect on individuals of the species, as
well as other actions or conditions that may ameliorate any negative
effects or may have positive effects.
We use the term ``threat'' to refer in general to actions or
conditions that are known to or are reasonably likely to negatively
affect individuals of a species. The term ``threat'' includes actions
or conditions that have a direct impact on individuals (direct
impacts), as well as those that affect individuals through alteration
of their habitat or required resources (stressors). The term ``threat''
may encompass--either together or separately--the source of the action
or condition or the action or condition itself.
However, the mere identification of any threat(s) does not
necessarily mean that the species meets the statutory definition of an
``endangered species'' or a ``threatened species.'' In determining
whether a species meets either definition, we must evaluate all
identified threats by considering the expected response by the species,
and the effects of the threats--in light of those actions and
conditions that will ameliorate the threats--on an individual,
population, and species level. We evaluate each threat and its expected
effects on the species, then analyze the cumulative effect of all of
the threats on the species as a whole. We also consider the cumulative
effect of the threats in light of those actions and conditions that
will have positive effects on the species, such as any existing
regulatory mechanisms or conservation efforts. The Secretary determines
whether the species meets the definition of an ``endangered species''
or a ``threatened species'' only after conducting this cumulative
analysis and describing the expected effect on the species now and in
the foreseeable future.
The Act does not define the term ``foreseeable future,'' which
appears in the statutory definition of ``threatened species.'' Our
implementing regulations at 50 CFR 424.11(d) set forth a framework for
evaluating the foreseeable future on a case-by-case basis. The term
``foreseeable future'' extends only so far into the future as the
Services can reasonably determine that both the future threats and the
species' responses to those threats are likely. In other words, the
foreseeable future is the period of time in which we can make reliable
predictions. ``Reliable'' does not mean ``certain''; it means
sufficient to provide a reasonable degree of confidence in the
prediction. Thus, a prediction is reliable if it is reasonable to
depend on it when making decisions.
It is not always possible or necessary to define foreseeable future
as a particular number of years. Analysis of the foreseeable future
uses the best scientific and commercial data available and should
consider the timeframes applicable to the relevant threats and to the
species' likely responses to those threats in view of its life-history
characteristics. Data that are typically relevant to assessing the
species' biological response include species-specific factors such as
lifespan, reproductive rates or productivity, certain behaviors, and
other demographic factors.
[[Page 33072]]
Analytical Framework
The 5-year review documents the results of our comprehensive
biological status review for the species, including an assessment of
the potential threats to the species. The review provides the
scientific basis that informs our regulatory decisions, which involve
the further application of standards within the Act and its
implementing regulations and policies. The 5-year review can be found
at https://www.regulations.gov under Docket FWS-R8-ES-2019-0065. Where
information in the 5-year review is out of date, we have provided
updated information in this proposed rule.
Summary of Biological Status and Threats
Historical analyses and discussion of the threats to San Benito
evening-primrose are detailed in the Recovery Plan (USFWS 2006, pp. 26-
36) and 5-Year Review (USFWS 2009, pp. 10-18). An updated analysis and
discussion follows here. Primary threats to San Benito evening-primrose
identified in the listing rule included OHV use of occupied and
potential habitat and gravel mining. Uncertainty about the reproductive
capacity of the species and vandalism were also considered additional
threats at listing. Vandalism was considered a threat due to the small
population size and public resistance to listing the species under the
Act. The resistance came from the OHV community perception that listing
the species would inhibit their ability to continue recreating.
However, vandalism was not believed to be significant with subsequent
reviews of the species in the Recovery Plan and 5-Year Review and is
not considered further in this proposed rule. Since listing, the
Recovery Plan and 5-Year Review identified as additional threats: Soil
loss and elevated erosion rates from OHV trails and staging areas,
camping, facilities construction and maintenance, habitat alteration
due to invasive species and/or natural vegetation community succession,
climate change and the local effect on precipitation patterns and
temperature, and stochastic events. The following sections provide a
summary of the past, current, and potential future threats relating to
San Benito evening-primrose.
Off-Highway Vehicle Use
Off-highway vehicle use of open serpentine barrens and alluvial
terraces was considered the primary threat to San Benito evening-
primrose when it was listed in 1985. Soil disturbance from OHVs use
increased soil loss, soil compaction, and could result in the physical
removal of plants. Staging areas and camping associated with OHV use
had similar negative impacts to the species and its habitat. Between
1985 and 2010, the BLM implemented a series of measures to reduce
effects to known habitat and occurrences of San Benito evening-primrose
through fencing of sensitive areas, signage, designation of specific
open riding areas, and enforcement and management of designated OHV
trails. In 2005, the BLM estimated 50,000 visitor-use days per year
occurred within the CCMA (USFWS 2006, p. 27). OHV use decreased in 2008
following the release of an EPA report that found high levels of
naturally occurring asbestos that posed a significant health risk to
visitors within the Serpentine ACEC.
To address the EPA findings, the BLM issued new Management Plans
and associated Records of Decision in 2014, which restricted OHV access
to areas of suitable habitat and known sub-occurrences of San Benito
evening-primrose by reducing the amount of open trails and restricting
access to the Serpentine ACEC to 5 days per year per recreationalist
through a permit system and a series of locked gates (BLM 2014, pp. 1-
18). Currently, only highway-licensed vehicles are allowed within the
Serpentine ACEC on designated roads and by permit, which is limited to
five use-days per year per person. These restrictions on OHV use have
effectively removed OHV impacts to San Benito evening-primrose. OHV
non-compliance with fencing and trail restrictions has been monitored
within lands managed by the BLM. Findings of non-compliance remain low
compared to levels of use prior to closure (table 2). Occurrences
located on private property are not protected from OHV use, and
occurrences on BLM land near private land are at greater risk of
disturbance from OHV trespass. Under the current Resource Management
Plan (BLM 2014, entire), because of its implementation of closures and
restrictions, we do not consider OHV use will become a threat to
occurrences on BLM land in the foreseeable future. While BLM
restrictions do not provide protection to occurrences on private land,
the best available data on historical and current recreation levels do
not indicate that the level of OHV use on private land will increase
from current levels to levels that would threaten the persistence of
the species in the foreseeable future.
Mining
The last commercial mining in the CCMA ceased extraction activities
in 2002 (BLM 2018, p. 66). The BLM has acquired surface rights to 208
ha (520 ac) along the lower reaches of Clear Creek up to and including
the confluence with the San Benito River. This acquisition protects
habitat and occurrences of San Benito evening-primrose, but without
having the mineral rights to the land, it cannot be considered fully
under the control of the BLM (USFWS 2009, p. 13). The BLM decided in
the 2014 Resource Management Plan that no mineral leasing or sales on
public lands will occur within the Serpentine ACEC and that mineral
leasing and sales on public lands outside of the Serpentine ACEC will
have ``no surface occupancy'' stipulations where occupied special
status species habitat occurs (BLM 2018, pp. 1-36 through 1-37). With
these requirements, and no active mining leases within suitable habitat
and known occurrences, we conclude that mining is no longer a
significant threat to San Benito evening-primrose and is not likely to
become a threat in the foreseeable future
Rock hounding (hobby of collecting rock and mineral specimens from
the natural environment) within the CCMA persists as a recreation
activity, although quantifying the amount and effect of rock hounding
on San Benito evening-primrose is lacking. However, given the
restricted vehicle access and relatively low impact of an individual
user versus a commercial mining operation, we consider that effects to
San Benito evening-primrose from rock hounding are negligible and are
not likely to become a threat in the foreseeable future.
Soil Loss and Elevated Erosion Rates
Soil loss and erosion may occur naturally due to seasonal
disturbances as would be expected by frost heaving, overland sheet flow
from precipitation, unconsolidated soil, sparse vegetation, and flood
events. These natural disturbances promote areas relatively free of
dense vegetation, increase water infiltration, and may aid in dispersal
of the San Benito evening-primrose downstream or downslope from
existing occurrences. Many of the threats presented under Factor A may
be considered a ``disturbance'' to the habitat of the species, but this
does not mean that they are beneficial. For example, the effects to
soil from frost heaving and overland sheet flow are very different from
those resulting from repeated use of OHVs. The BLM attempted to
quantify the differences between the natural, or background, rates of
soil loss and erosion, and those that result from OHV and highway
[[Page 33073]]
vehicle use. The mean background soil loss in the Clear Creek Watershed
was 8 yards\3\ (yd\3\)/ac-year (11 tons/ac-year) and that soil loss
resulting from OHV open riding resulted in soil loss of 12 yd\3\/ac-
year (16 tons/ac-year) (PTI Environmental 1993, pp. 36-39). The erosion
rate from roads was estimated at 59 yd\3\/ac-year (80 tons/ac-year).
Increased erosion and elevated soil loss are indicative of loss of
suitable habitat. The seed bank may be lost as soil erodes and the
remaining soil may become compacted, decreasing germination potential
as well as water retention. Trails that form from repeated use on open
slopes or terraces may collect and funnel water, creating runnels,
which in turn increase erosion while drawing water away from adjacent
areas (Brooks and Lair 2005, p. 7; Ouren et al. 2007, pp. 5-16). The
BLM has recognized this issue and has attempted to enact minimization
measures for soil loss and erosion. In the most recent Resource
Management Plan, the BLM includes guidelines that call for road
closures during extreme wet weather, prioritizing closed roads for
restoration and reclamation, and establishing automated weather
stations to monitor precipitation and soil moisture and requires
approved erosion control strategies to be evaluated for any soil-
disturbing activities on slopes of 20-40 percent (BLM 2014, p. 1-30).
Presently, the threat of soil loss and erosion is limited to natural
cycles, remnant effects of past land use, and roads (for which the
above minimization measures apply). Considering that additional sub-
occurrences of San Benito evening-primrose continue to be identified
and persist within habitat that is more prone to erosion (upland slopes
of the geologic transition zone habitat type), it is unlikely that
natural rates of soil loss and erosion present a threat to the
continued existence of the species and is not likely to do so in the
foreseeable future.
Facilities Construction and Maintenance
The construction of the BLM Section 8 Administrative Site in 1988
and associated structures resulted in direct loss of San Benito
evening-primrose and its habitat, although the species still occurs in
the vicinity of the disturbance (USFWS 2009, pp. 12-13, BLM 2018, p.
34). The Section 8 Administrative Site was decommissioned in 2010 and
replaced by the Clear Creek Administrative Site. The new administrative
site was not constructed on occupied or potential habitat for San
Benito evening-primrose, although the impacts resulting from the
original disturbance remain (BLM 2018, p. 66). The old Section 8
Administrative Site is infrequently used and, at current levels of use,
does not present a threat to the persistence of San Benito evening-
primrose due to the discovery of new sub-occurrences and potential
habitat throughout the CCMA (BLM 2018 p. 66). No new facilities and
construction projects are planned, and it is not likely that new
projects in occupied or potential habitat will be proposed in the
foreseeable future.
Habitat Alteration Due to Invasive Species
The serpentine-derived soils inhibit invasion from nonnative plant
species where San Benito evening-primrose occurs. However, the habitat
may still be degraded if invasion by nonnative species is allowed to
occur on adjacent land. High densities of nonnative species may
negatively influence existing or potential habitat for San Benito
evening-primrose by providing a persistent threat of colonization.
Yellow star thistle (Centaurea solstitialis) and tocalote (C.
melitensis) have been actively controlled near occurrences of San
Benito evening-primrose within the CCMA since 2005 (BLM 2018, p. 62).
The BLM has identified prescribed fire followed by broadcast
application of clopyralid, a broadleaf specific herbicide, as the most
effective means of reducing the cover of invasive species threatening
San Benito evening-primrose. The cover of yellow star thistle has been
reduced by 95 percent in the Clear Creek drainage, and San Benito
evening-primrose has expanded into the improved habitat (BLM 2018, p.
62). The natural buffer that the serpentine-derived soils provide,
coupled with BLM's management of invasive species and the expansion of
known sub-occurrences and potential habitat, make it unlikely that
invasive species present a significant threat either now or into the
future to the persistence of San Benito evening-primrose. The abundance
of invasive species will be monitored as part of the Post-delisting
Monitoring Plan. The Post-delisting Monitoring Plan will suggest
thresholds that will determine the necessary control efforts on
federally managed land.
Succession to Woody Shrub Community
San Benito evening-primrose habitat is typically open and
relatively free of high amounts of woody vegetation and canopy cover.
Succession to a woody shrub community in habitat that presently or
historically supported San Benito evening-primrose could result in
increased canopy cover (potentially shading out San Benito evening-
primrose) and increased competition for resources (lessening the
success of establishment and survival) (Taylor 1990, p. 66).
Photopoints initiated by the BLM in 1980 suggest that open serpentine
barrens are less susceptible to encroachment by woody shrubs (typically
chaparral species such as manzanita (Arctostaphylos spp.)) than
alluvial terrace habitat. This is presumably due to the greater
concentration of serpentine soils on the open barrens compared to the
more organic rich soils of the alluvial terraces. Continued evidence of
encroachment into areas occupied by San Benito evening-primrose has
been observed at established photomonitoring points (BLM 2018, pp. 56-
57).
The immediate effect of encroachment by woody vegetation would be
to reduce, or possibly eliminate, known occurrences and potential
habitat of San Benito evening-primrose through competition and
alteration of habitat structure. It is possible that the seed bank,
once established, is long lived enough that it may persist through
cycles of vegetation community shifts due to natural events such as
fires. However, the species has not been studied for sufficient time to
observe the effects of vegetation succession. The BLM has estimated
that seed may remain viable for 107 years in the presence of common co-
occurring shrubs (BLM 2015, pp. 16-28).
San Benito evening-primrose has not been observed in the geologic
transition zone habitat for as long a period of time as either alluvial
terrace habitat or the open serpentine barrens. As a result, the rate
of succession to woody vegetation is not as well understood. It is
likely that the rate of succession to woody habitat is less within
geologic transition zone habitat than alluvial terrace, but greater
than the rate of succession compared to open serpentine barrens.
Succession of plant communities is a natural process and may result in
loss of current or potential habitat. However, the amount of new sub-
occurrences that have been identified lessen the immediate risk to the
existence of the species; therefore, succession to woody shrub
community is not currently a species-level threat. No occurrences of
San Benito evening-primrose have been extirpated due to succession of
woody vegetation since monitoring began in 1980, and, because San
Benito evening-primrose grows on serpentine soils, threats to the
species from succession to woody vegetation is also unlikely to be a
threat in the foreseeable future.
[[Page 33074]]
Stochastic Events
At the time of listing, only nine occurrences of San Benito
evening-primrose were known within a relatively restricted range. The
small number of occurrences increased the susceptibility of the species
to extinction from a stochastic event, such as a fire, flood, drought,
or other unpredictable event, because a single event had the capability
to negatively impact all known occurrences at the same time. The threat
from stochastic events due to a small number of occurrences has
decreased as the number of known occurrences has increased to 79
occurrences (519 sub-occurrences or 658 point locations) occurring
across multiple watersheds, and into a new habitat type (the geologic
transition zone). The species' current known range is bordered on the
north by New Idria Road near the confluence of Larious Creek and San
Carlos Creek, to the south at the Monterey County line near Lewis
Creek, to the west near the Hernandez Reservoir, and to the east by the
eastern boundary of the Serpentine ACEC, an area of approximately 307
square miles.
Within this broad range, approximately 260 ac (105 ha) is
considered potential habitat (BLM 2018, p. 31) and 63.2 ac (25.6 ha)
are known to be occupied. Despite the occupied area being relatively
small, it is spread over a large geographic area across multiple
habitat types and many occurrences, suggesting a low possibility of
extinction from a single stochastic event. The presence of a long-lived
and well-established seed bank further insulates San Benito evening-
primrose from the possibility of extinction due to a single stochastic
event. The land management practices of the BLM within the CCMA have
promoted preserving and restoring San Benito evening-primrose habitat
and the natural soil processes and hydrology of the watersheds it
occurs within as well. Stochastic events are unlikely to threaten the
species in the foreseeable future due to the current range of San
Benito evening-primrose and number of known occurrences.
Climate Change
The terms ``climate'' and ``climate change'' are defined by the
Intergovernmental Panel on Climate Change. The term ``climate change''
thus refers to a change in the mean or variability of one or more
measures of climate (for example, temperature or precipitation) that
persists for an extended period, whether the change is due to natural
variability or human activity (IPCC 2014a, pp. 119-120). The effects of
climate change are wide ranging but include alteration of historical
climate patterns including storm frequency and severity, seasonal
shifts in temperatures, and changing precipitation patterns. Globally,
these effects may be positive, neutral, or negative for any given
species, ecosystem, land use, or resource, and they may change over
time (IPCC 2014b, pp. 49-54; IPCC 2018, pp. 9-12). Potential effects
derived from climate change have consequences for the biological
environment and may result in changes to the suitability of currently
occupied habitat through increased drought stress, shortened growing
seasons, and alteration of the historical soil and hydrologic cycles.
The synthesis report that was issued by IPCC is conclusive that future
climate conditions will be dissimilar from current climate conditions.
The effects of these changes to San Benito evening-primrose and its
habitat are not known, but we may reasonably infer potential effects
from the globally anticipated changes. The State of California
assessment on climate change provides a better estimate for the effects
of climate change to areas occupied by San Benito evening-primrose.
California released its fourth climate change assessment in 2018
(Langridge 2018, entire). The California assessment differs from the
IPCC assessments in that it is localized to the State and has specific
analyses for nine regions within the State. California's Fourth Climate
Change Assessment uses downscaled versions of the global climate models
used by IPCC to create localized predictions based on future emissions
scenarios in order to provide relevant predictions for management and
planning. The range of San Benito evening-primrose falls within the
Central Coast region of California's fourth climate change assessment.
In general, the region is expected to experience increasing minimum and
maximum temperatures and slight increases in precipitation with
significant increases in variability (Langridge 2018, p. 6). These
expected trends are slightly variable across the three watersheds
within which San Benito evening-primrose occurs (hydrologic unit code
(HUC) 10): Upper San Benito River, Los Gatos Creek, and Larious Creek-
Silver Creek. The predicted increases in minimum temperature, maximum
temperature, and precipitation are similar for both high
(representative concentration pathway (RCP) 8.5) and low (RCP 4.5)
emissions scenarios and across model variations (Cal-adapt 2018, p. NA;
table 5).
Table 5--Changes in Precipitation, Minimum Average Temperature, and Maximum Average Temperature for Low and High Emission Scenarios Compared to
Historical Averages for the Three Watersheds Within Which San Benito Evening-Primrose Occurs
--------------------------------------------------------------------------------------------------------------------------------------------------------
Precipitation (inches) Min avg. temp. (degrees F) Max avg. temp. (degrees F)
-----------------------------------------------------------------------------------------------
Watershed Historical RCP 4.5 (RCP Historical RCP 4.5 (RCP Historical RCP 4.5 (RCP
average 8.5) average 8.5) average 8.5)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Upper San Benito River.................................. 17.8 20.4 (19.7) 38.9 41.7 (42.3) 71.0 73.9 (74.4)
Los Gatos Creek......................................... 14.4 16.8 (15.3) 44.7 47.5 (48.1) 74.8 77.6 (78.1)
Larious Creek-Silver Creek.............................. 15.1 17.4 (16.6) 42.3 45.3 (45.9) 72.3 75.3 (75.8)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Watersheds are based on the HUC 10 resolution. Reported values for the modeled futures are based on the average of the HadGEM2-ES (warmer and drier),
CNRM-CM5 (cooler and wetter), and CanESM2 (average) models. The RCP 4.5 scenario refers to a future scenario where emissions peak near 2040 and then
decline, while RCP 8.5 refers to a scenario where emissions continue to rise strongly through 2050 and plateau near 2100. The historical average is
based on the years 1950-2005 as reported by cal-adapt.org. The modeled values are estimates from the years 2020-2050.
Based on the state of California assessment of climate change, the
IPCC data, taking into account known uncertainties with climate change
projection, the effects of the predicted changes due to climate change
to occurrences of San Benito evening-primrose are varied. A slight
increase in precipitation may provide additional
[[Page 33075]]
water during the growing season, but the variability between seasons
may result in long periods of drought followed by high-volume
precipitation that may cause erosion. Increasing minimum temperatures
may reduce the amount of days with frost, thereby altering the physical
cues for germination, and increasing maximum temperatures could result
in increased stress for flowering individuals. Conversely, increased
amounts of rain may promote increased germination and seedling success.
In order to precisely understand the effects of climate change,
location-specific data on temperature, precipitation, San Benito
evening-primrose germination, seedling success, and seed bank cycling
over multiple years would be needed.
Shifts in community composition are likely to occur as a result of
changes in California's climate and may impact the long-term
suitability of currently occupied and potential habitat for San Benito
evening-primrose. All California macrogroups of vegetation are expected
to have moderate to high risk of vulnerability to climate change
(Thorne et al. 2016, p. 1). This means that all vegetation communities
are susceptible to portions of their current range becoming unsuitable.
It is also possible that previously unsuitable areas for a given
macrogroup will become suitable as physical parameters that were
previously unfavorable become favorable. Vegetation communities
migrating higher in elevation along temperature gradients or moving
upland as sea levels rise along hydrological gradients are typical
examples of this scenario. However, the ability of a vegetation
macrogroup to migrate assumes that natural seed dispersal pathways are
available and that undeveloped land exists along dispersal pathways.
San Benito evening-primrose occurs within three macrogroups within
San Benito and Fresno Counties: California foothill and valley forests
and woodlands, chaparral, and California annual and perennial
grassland. California foothill and valley forests and woodlands and
chaparral are both ranked at moderate risk of vulnerability, and
California annual and perennial grassland is ranked as moderate to high
risk of vulnerability (Thorne et al. 2016, p. 3; table 6). Estimates of
the percent of existing habitat that will become unsuitable, have no
change, or become newly suitable based on low and high emissions
scenarios are shown in table 6 based on data within Thorne et al.
(2016, pp. 33-41; 114-122; 132-140).
Table 6--Results of Sensitivity and Adaptive Capacity Modeling and the Resulting Change in Suitability of Existing Habitat for Three Vegetation
Macrogroups Within Which San Benito Evening-Primrose Occurs
--------------------------------------------------------------------------------------------------------------------------------------------------------
Unsuitable No change Newly suitable
Vegetation macrogroup Mean vulnerability rank -----------------------------------------------------------------------------
Low (%) High (%) Low (%) High (%) Low (%) High (%)
--------------------------------------------------------------------------------------------------------------------------------------------------------
California foothill and valley forests Moderate....................... 24 59 41 76 11 34
and woodlands.
Chaparral................................ Moderate....................... 8 54 46 92 17 47
California annual and perennial grassland Mid-High....................... 16 48 52 84 10 52
--------------------------------------------------------------------------------------------------------------------------------------------------------
Data from Thorne et al. 2016 pp. 3; 33-41; 114-122; 132-140.
Under both high and low emissions scenarios, currently suitable
habitat for San Benito evening-primrose is lost due to changes in
climate. Conversely, the species that compose the vegetation
communities that are associated with San Benito evening-primrose are
expected to have the capability to migrate into newly suitable habitat.
The primary concern, in regard to San Benito evening-primrose habitat,
is the threat of an increase in woody vegetation as a response to
climate change. However, San Benito evening-primrose is found in
serpentine and serpentine-derived soils that are not likely to be
affected by climate change in the foreseeable future. The edaphic
(soil) conditions may restrain woody vegetation migration into areas
currently occupied. While the soil type may mitigate habitat loss due
to habitat conversion, it may also restrain the species from dispersing
to areas where climatic conditions are more favorable for survival. The
currently predicted changes in precipitation and climate do not suggest
that the species may become endangered due to those changes in the
foreseeable future.
Existing Regulatory Mechanisms
State Protections
San Benito evening-primrose is not a State-listed taxon under the
California Endangered Species Act. The species is listed by the
California Native Plant Society (CNPS) as 1B.1, indicating that the
taxon is rare throughout its range and is generally endemic to
California as well as having been reduced throughout its historical
range. Species listed by CNPS as 1B.1 meet the definition of threatened
in the California Endangered Species Act as described in the California
Fish and Game Code (CNPS 2018 Rare Plant Inventory website) and must
therefore be considered during environmental analysis for California
Environmental Quality Act (CEQA) documentation (CEQA 2018 Guidelines
Section 15380).
Federal Protections
In 2001, the BLM published the National Management Strategy for
Motorized Off-Highway Vehicle Use on Public Lands. This guiding
document ensures consistent and positive management of environmentally
responsible motorized OHV use on public lands. Detailed regulations are
established in BLM's 2014 Resource Management Plan for the CCMA that
provides for protections of San Benito evening-primrose. BLM's 2014
Resource Management Plan for the CCMA is in place until superseded. The
restriction of OHV use within the CCMA and the Serpentine ACEC is based
on concerns of health risks and will be unaffected by the delisting of
San Benito evening-primrose. Currently, only highway-licensed vehicles
are allowed within the Serpentine ACEC on designated roads and by
permit, which is limited to five use-days per year per person, and
within the CCMA trail riding is restricted to designated areas near
Condon Peak (BLM 2014, p. 1-18). The Post-delisting Monitoring Plan
will provide for continued evaluation of the status of occurrences to
prevent the species from again becoming warranted for listing under the
Federal Endangered Species Act.
[[Page 33076]]
The BLM has regulations and policies that guide the management of
natural resources on the public lands they manage. In particular,
Congress passed the Federal Land Policy and Management Act of 1976 to
provide policy for ``the management, protection, development, and
enhancement'' of public lands managed by the BLM. This law directs the
BLM to ``take any action necessary to prevent unnecessary or undue
degradation of the lands'' during mining operations (43 U.S.C.
1732(b)). Mining operations that exceed 5 acres (2.02 ha), and certain
other defined operations, require a plan of operations approved by the
BLM (43 CFR 3809.1-4, 1-6).
BLM may enact special rules to protect soil, vegetation, wildlife,
threatened or endangered species, wilderness suitability, and other
resources by immediately closing affected areas to off-road vehicles
that are causing resource damage until the adverse effects are
eliminated and measures are implemented to prevent recurrence (43 FR
8340-8364).
Two Executive Orders (E.O.) apply specifically to off-road vehicles
on public lands: E.O. 11644 directs agencies to designate zones of off-
road use that are based on protecting natural resources, the safety of
all users, and minimizing conflicts among various land uses. The BLM
and other agencies are to locate such areas and trails to minimize
damage to soil, watershed, vegetation, or other resources, and to
minimize disruption to wildlife and their habitats. Areas may be
located in designated park and refuge areas or natural areas only if
the head of the agency determines that off-road use will not adversely
affect the natural, aesthetic, or scenic values of the locations. The
respective agencies are to ensure adequate opportunity for public
participation in the designation of areas and trails.
E.O. 11989 amends the previous order by adding the following
stipulations: (a) Whenever the agency determines that the use of off-
road vehicles will cause or is causing considerable adverse effects on
the soil, vegetation, wildlife, wildlife habitat, or cultural or
historic resources of particular areas or trails on public lands, it is
to immediately close the areas or trails to the type of off-road
vehicle causing the effects until it determines that the adverse
effects have ceased and that measures are in place to prevent future
recurrence; and (b) each agency is to close portions of public lands
within its jurisdiction to off-road vehicles except areas or trails
designated as suitable and open to off-road vehicle use.
As San Benito evening-primrose is a listed species under the Act,
the BLM is required to consult with the Service on any activities it
funds, authorizes, or carries out that may affect San Benito evening-
primrose. There are no Federal prohibitions under the Act for
negatively impacting listed plants on non-Federal lands, unless a
person damages or destroys federally listed plants while in violation
of a State law or a criminal trespass law. Where the species occurs on
private lands, protections afforded by section 7(a)(2) of the Act are
triggered only if there is a Federal nexus (i.e., an action funded,
permitted, or carried out by a Federal agency). If the species is
delisted, the protections afforded by the Act would no longer apply.
Even in the absence of the protections of the Act, adequate regulatory
mechanisms are in place, such as the Federal Land Policy and Management
Act of 1976, E.O. 11644 and E.O. 11989, to ensure the continued
persistence of San Benito evening-primroses occurrences and suitable
potential habitat.
Summary of Threats Analysis
A very limited range, small number of occurrences, and direct and
indirect threats from OHV use and mining and associated facilities and
road maintenance were the primary threats to San Benito evening-
primrose at the time of listing in 1985 (50 FR 5755-5759, February 12,
1985). OHV use continued to be a significant threat to San Benito
evening-primrose until the temporary closure of the Serpentine ACEC in
2008. The 2014 Resource Management Plan permanently reduced the amount
of exposure San Benito evening-primrose has to OHV recreation and has
resulted in indirectly removing the most significant threat to the
species, which was direct loss of individuals by OHV recreation and
indirect loss of habitat and seed bank through erosion on slopes and
soil compaction on alluvial terraces. The threat from mining was
reduced by 2002 with the closure of the last commercial mine, and
future threats from mining are unlikely based on BLM management actions
listed in the 2014 Resource Management Plan for the CCMA. Habitat
alteration from invasive species and succession to woody vegetation
communities are not likely to threaten San Benito evening-primrose
because invasive species and woody vegetation communities are
intolerant to serpentine soils. The significant increase in the number
of known occurrences and the associated increase in range and the new
habitat association greatly reduce the threat of stochastic events
resulting in significant loss to the species. The effects of climate
change on the species are predicted changes in temperature and rainfall
by 2050, and do not suggest species-level threats to survival.
When individual threats that influence reproductive output,
germination, and survival occur together, one threat may add to, or
exacerbate, the effects of another, resulting in a disproportionate
increase in threat to the species. When this occurs, we call the
interactive effects synergistic or cumulative. The lack of current
threats to San Benito evening-primrose reduce the possibility of
synergistic or cumulative effects occurring, and, given the current
range of the species, number of known occurrences, and likelihood of
new occurrences to become known, synergistic and cumulative effects do
not pose a significant population-level impact to San Benito evening-
primrose at this time nor do we anticipate that they will in the
future.
Determination of San Benito Evening-Primrose Status
Section 4 of the Act (16 U.S.C. 1533) and its implementing
regulations (50 CFR part 424) set forth the procedures for determining
whether a species meets the definition of ``endangered species'' or
``threatened species.'' The Act defines an ``endangered species'' as a
species that is ``in danger of extinction throughout all or a
significant portion of its range,'' and a ``threatened species'' as a
species that is ``likely to become an endangered species within the
foreseeable future throughout all or a significant portion of its
range.'' For a more detailed discussion on the factors considered when
determining whether a species meets the definition of ``endangered
species'' or ``threatened species'' and our analysis on how we
determine the foreseeable future in making these decisions, see
Regulatory Framework, above.
Status Throughout All of Its Range
After evaluating threats to the species and assessing the
cumulative effect of the threats under the section 4(a)(1) factors, we
have assessed the best scientific and commercial information available
regarding the past, present, and future threats faced by San Benito
evening-primrose in this proposed rule. At the time of listing in 1985
(50 FR 5755-5759, February 12, 1985), San Benito evening-primrose was
known from only nine occurrences within a very narrow range that were
all subject to potential loss from the threats listed in Factors A
through E.
[[Page 33077]]
Off-highway vehicle recreation (Factor A), the greatest persistent
threat to the species, has been reduced to levels that no longer pose a
significant threat of extinction to San Benito evening-primrose or loss
of its habitat, due to the closure of the Serpentine ACEC and the
restriction of OHV use within the CCMA but outside of the Serpentine
ACEC. Most significantly, surveys by the BLM have shown that the
species is much more wide-ranging and common than originally known and
occurs across a broader range of habitat types. The number of known
occurrences has increased from 9 to 79 and includes 658 mapped point
locations. The range of the species is now known from three watersheds,
and occupied habitat covers 63.2 acres (25.6 ha). Our understanding of
the ecology of the species has demonstrated that the species may
persist through periods of disturbance due to the persistence of a
robust and long-lived seedbank that facilitates reestablishment,
dispersal, and buffers against stochastic events. Annual surveys of San
Benito evening-primrose have demonstrated that there is a large amount
of interannual variation in numbers of individuals observed. We believe
that the 27 occurrences that have been monitored since 1983 have
remained relatively stable around a 5-year moving average when the
abnormally high count year (1988) is considered. Furthermore, the
significant increase in the number of occurrences is not represented in
the analysis of the 27 occurrences that were known at the time the
Recovery Plan was written. The best available information indicates
that Factors B, C, and E are not affecting the species and are unlikely
to do so in the foreseeable future. The existing regulatory mechanisms
in place are adequate to ensure the continued persistence of San Benito
evening-primrose occurrences and suitable potential habitat because a
majority of occurrences are managed on Federal land and are protected
by a 2014 BLM Resources Management Plan and a BLM Area of Critical
Environmental Concern (ACEC) designation. Based on the information
presented in this status review, the recovery criteria in the Recovery
Plan have been achieved and the recovery goal identified in the
Recovery Plan has been met for San Benito evening-primrose. Thus, after
assessing the best available information, we conclude that San Benito
evening-primrose is not in danger of extinction throughout all of its
range either now or within the foreseeable future.
Status Throughout a Significant Portion of Its Range
Under the Act and our implementing regulations, a species may
warrant listing if it is in danger of extinction or likely to become so
within the foreseeable future throughout all or a significant portion
of its range.
Having determined that San Benito evening-primrose is not in danger
of extinction or likely to become so within the foreseeable future
throughout all of its range, we now consider whether it may be in
danger of extinction or likely to become so within the foreseeable
future in a significant portion of its range. The range of a species
can theoretically be divided into portions in an infinite number of
ways, so we first screen the potential portions of the species' range
to determine if there are any portions that warrant further
consideration. To do the ``screening'' analysis, we ask whether there
are portions of the species' range for which there is substantial
information indicating that: (1) The portion may be significant; and
(2) the species may be, in that portion, either in danger of extinction
or likely to become so in the foreseeable future. For a particular
portion, if we cannot answer both questions in the affirmative, then
that portion does not warrant further consideration and the species
does not warrant listing because of its status in that portion of its
range. Conversely, we emphasize that answering both of these questions
in the affirmative is not a determination that the species is in danger
of extinction or likely to become so in the foreseeable future
throughout a significant portion of its range--rather, it is a step in
determining whether a more-detailed analysis of the issue is required.
If we answer these questions in the affirmative, we then conduct a
more thorough analysis to determine whether the portion does indeed
meet both of the ``significant portion of the range prongs'': (1) The
portion is significant and (2) the species is, in that portion, either
in danger of extinction or likely to become so within the foreseeable
future. Confirmation that a portion does indeed meet one of these
prongs does not create a presumption, prejudgment, or other
determination as to whether the species is an endangered species or
threatened species. Rather, we must then undertake a more detailed
analysis of the other prong to make that determination. Only if the
portion does indeed meet both significant portion of the range prongs
would the species warrant listing because of its status in a
significant portion of its range.
We evaluated the range of San Benito evening-primrose to determine
if any area may be a significant portion of the range. San Benito
evening-primrose is a narrow endemic that occurs over 300 square miles,
but occupies a relatively small amount of acreage (63.2 ac (25.6 ha) of
occupied habitat). Genetic analysis indicated no differentiation in
occurrences based on watershed or habitat and that there was no
hybridization with a close relative. Every threat to the species in any
portion of its range is a threat to the species throughout all of its
range, and so the species has the same status under the Act throughout
its narrow range. Therefore, we conclude, based on this screening
analysis, that the species is not in danger of extinction or likely to
become so in the foreseeable future in any significant portion of its
range. Our conclusion--that we do not undertake additional analysis if
we determine that the species has the same status under the Act
throughout its narrow range--is consistent with the courts' holdings in
Desert Survivors v. Department of the Interior, No. 16-cv-01165-JCS,
2018 WL 4053447 (N.D. Cal. Aug. 24, 2018); Center for Biological
Diversity v. Jewell, 248 F. Supp. 3d, 946, 959 (D. Ariz. 2017); and
Center for Biological Diversity v. Everson, 2020 WL 437289 (D.D.C. Jan.
28, 2020).
Determination of Status
Our review of the best scientific and commercial data available
indicates that the San Benito evening-primrose does not meet the
definition of an endangered species or a threatened species in
accordance with sections 3(6) and 3(20) of the Act. Therefore, we
propose to delist the San Benito evening-primrose from the List of
Endangered and Threatened Plants.
Effects of This Rule
If this proposed rule is made final, it would revise 50 CFR
17.12(h) to remove San Benito evening-primrose from the Federal List of
Endangered and Threatened Plants. The prohibitions and conservation
measures provided by the Act, particularly through sections 7 and 9,
would no longer apply to San Benito evening-primrose. Federal agencies
would no longer be required to consult with the Service under section 7
of the Act in the event that activities they authorize, fund, or carry
out may affect San Benito evening-primrose.
Post-Delisting Monitoring
Section 4(g)(1) of the Act requires us to implement a system to
monitor effectively, for not less than 5 years, all species that have
been recovered and
[[Page 33078]]
delisted (50 CFR 17.11, 17.12). The purpose of this post-delisting
monitoring is to verify that a species remains secure from the risk of
extinction after it has been removed from the protections of the Act.
The monitoring is designed to detect the failure of any delisted
species to sustain itself without the protective measures provided by
the Act. If, at any time during the monitoring period, data indicate
that protective status under the Act should be reinstated, we can
initiate listing procedures, including, if appropriate, emergency
listing under section 4(b)(7) of the Act. Section 4(g) of the Act
explicitly requires us to cooperate with the States in development and
implementation of post-delisting monitoring programs, but we remain
responsible for compliance with section 4(g) and, therefore, must
remain actively engaged in all phases of post-delisting monitoring. We
also seek active participation of other entities that are expected to
assume responsibilities for the species' conservation post-delisting.
Post-Delisting Monitoring Overview
If we make this proposed rule final, the post-delisting monitoring
is designed to verify that San Benito evening-primrose remains secure
from the risk of extinction after its removal from the Federal List of
Endangered and Threatened Plants by detecting changes in trend and
habitat suitability. A draft post-delisting monitoring plan for the
species can be found at https://www.regulations.gov under Docket No.
FWS-R8-ES-2019-0065. If this proposed rule is finalized, the final
post-delisting monitoring plan will be agreed upon by the Service and
the BLM prior to publication of a final rule.
Required Determinations
Clarity of the Rule
We are required by Executive Orders 12866 and 12988 and by the
Presidential Memorandum of June 1, 1998, to write all rules in plain
language. This means that each rule we publish must:
(a) Be logically organized;
(b) Use the active voice to address readers directly;
(c) Use clear language rather than jargon;
(d) Be divided into short sections and sentences; and
(e) Use lists and tables wherever possible.
If you feel that we have not met these requirements, send us
comments by one of the methods listed in ADDRESSES. To better help us
revise the rule, your comments should be as specific as possible. For
example, you should tell us the names of the sections or paragraphs
that are unclearly written, which sections or sentences are too long,
the sections where you feel lists or tables would be useful, etc.
National Environmental Policy Act (42 U.S.C. 4321 et seq.)
It is our position that, outside the jurisdiction of the U.S. Court
of Appeals for the Tenth Circuit, we do not need to prepare an
environmental analyses pursuant to the National Environmental Policy
Act of 1969 (NEPA; 42 U.S.C. 4321 et seq.) in connection with
regulations adopted pursuant to section 4(a) of the Act. We published a
notice outlining our reasons for this determination in the Federal
Register on October 25, 1983 (48 FR 49244). This position was upheld by
the U.S. Court of Appeals for the Ninth Circuit (Douglas County v.
Babbitt, 48 F.3d 1495 (9th Cir. 1995), cert. denied 516 U.S. 1042
(1996)).
Government-to-Government Relationship With Tribes
In accordance with the President's memorandum of April 29, 1994
(Government-to-Government Relations with Native American Tribal
Governments; 59 FR 22951), Executive Order 13175 (Consultation and
Coordination with Indian Tribal Governments), and the Department of the
Interior's manual at 512 DM 2, we readily acknowledge our
responsibility to communicate meaningfully with recognized Federal
Tribes on a government-to-government basis. In accordance with
Secretarial Order 3206 of June 5, 1997 (American Indian Tribal Rights,
Federal-Tribal Trust Responsibilities, and the Endangered Species Act),
we readily acknowledge our responsibilities to work directly with
tribes in developing programs for healthy ecosystems, to acknowledge
that tribal lands are not subject to the same controls as Federal
public lands, to remain sensitive to Indian culture, and to make
information available to tribes. There are no tribal lands associated
with this proposed rule.
References Cited
A complete list of all references cited in this proposed rule is
available on the internet at https://www.regulations.gov under Docket
No. FWS-R8-ES-2019-0065, or upon request from the Ventura Fish and
Wildlife Office (see FOR FURTHER INFORMATION CONTACT).
Authors
The primary authors of this proposed rule are the staff members of
the Ventura Fish and Wildlife Office in Ventura, California, in
coordination with the Pacific Southwest Regional Office in Sacramento,
California.
List of Subjects in 50 CFR Part 17
Endangered and threatened species, Exports, Imports, Reporting and
recordkeeping requirements, Transportation.
Proposed Regulation Promulgation
Accordingly, we propose to amend part 17, subchapter B of chapter
I, title 50 of the Code of Federal Regulations, as set forth below:
PART 17--ENDANGERED AND THREATENED WILDLIFE AND PLANTS
0
1. The authority citation for part 17 continues to read as follows:
Authority: 16 U.S.C. 1361-1407; 1531-1544; and 4201-4245,
unless otherwise noted.
Sec. 17.12 [Amended]
0
2. In Sec. 17.12(h), remove the entry for ``San Benito evening-
primrose (Camissonia benitensis)'' under FLOWERING PLANTS from the List
of Endangered and Threatened Plants.
Aurelia Skipwith,
Director, U.S. Fish and Wildlife Service.
[FR Doc. 2020-11024 Filed 5-29-20; 8:45 am]
BILLING CODE 4333-15-P