Endangered and Threatened Species; Critical Habitat for the Threatened Caribbean Corals, 76302-76357 [2020-21229]

Agencies

• DEPARTMENT OF COMMERCE
• National Oceanic and Atmospheric Administration

[Federal Register Volume 85, Number 229 (Friday, November 27, 2020)]
[Proposed Rules]
[Pages 76302-76357]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-21229]



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Vol. 85

Friday,

No. 229

November 27, 2020

Part IV





Department of Commerce





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National Oceanic and Atmospheric Administration





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50 CFR Parts 223 and 226





Endangered and Threatened Species; Critical Habitat for the Threatened 
Caribbean Corals; Proposed Rule

Federal Register / Vol. 85 , No. 229 / Friday, November 27, 2020 / 
Proposed Rules

[[Page 76302]]


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DEPARTMENT OF COMMERCE

National Oceanic and Atmospheric Administration

50 CFR Parts 223 and 226

[Docket No. 200918-0250]
RIN 0648-BG26


Endangered and Threatened Species; Critical Habitat for the 
Threatened Caribbean Corals

AGENCY: National Marine Fisheries Service (NMFS), National Oceanic and 
Atmospheric Administration (NOAA), Commerce.

ACTION: Proposed rule; request for comments.

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SUMMARY: We, NMFS, propose to designate critical habitat for the 
threatened Caribbean corals: Orbicella annularis, O. faveolata, O. 
franksi, Dendrogyra cylindrus, and Mycetophyllia ferox pursuant to 
section 4 of the Endangered Species Act (ESA). Twenty-eight mostly 
overlapping specific occupied areas containing physical features 
essential to the conservation of all these coral species are being 
proposed for designation as critical habitat; these areas contain 
approximately 15,000 square kilometers (km\2\; 5,900 square miles 
(mi\2\)) of marine habitat. We have considered positive and negative 
economic, national security, and other relevant impacts of the proposed 
designations, and we propose to exclude one area from the critical 
habitat designations due to anticipated impacts on national security. 
We are soliciting comments from the public on all aspects of the 
proposal, including our identification of the geographical area and 
depths occupied by the species, the physical and biological feature 
essential to the coral species' conservation and identification, areas 
not included and excluded, and consideration of impacts of the proposed 
action.

DATES: Comments on this proposal must be received by January 26, 2021.
    Public hearings: If requested, we will hold at least one public 
hearing on this proposed rule.

ADDRESSES: You may submit comments, identified by the docket number 
NOAA-NMFS-2020-0131, by any of the following methods:
     Electronic Submissions: Submit all electronic public 
comments via the Federal eRulemaking Portal. Go to www.regulations.gov/#!docketDetail;D=NOAA-NMFS-2020-0131 click the ``Comment Now'' icon, 
complete the required fields, and enter or attach your comments.
    Instructions: You must submit comments by the above to ensure that 
we receive, document, and consider them. Comments sent by any other 
method or received after the end of the comment period, may not be 
considered. All comments received are a part of the public record and 
will generally be posted to https://www.regulations.gov without change. 
All Personal Identifying Information (for example, name, address, etc.) 
voluntarily submitted by the commenter may be publicly accessible. Do 
not submit Confidential Business Information or otherwise sensitive or 
protected information.
    NMFS will accept anonymous comments (enter ``N/A'' in the required 
fields if you wish to remain anonymous).

FOR FURTHER INFORMATION CONTACT: Jennifer Moore, NMFS, SERO, 727-824-
5312, [email protected]; Celeste Stout, NMFS, Office of Protected 
Resources, 301-427-8436, [email protected].

SUPPLEMENTARY INFORMATION: In accordance with section 4(b) of the ESA 
and our implementing regulations (50 CFR 424.12), this proposed rule is 
based on the best scientific information available concerning the 
range, biology, habitat, threats to the habitat, and conservation 
objectives for the threatened Caribbean boulder star coral (Orbicella 
franksi), lobed star coral (O. annularis), mountainous star coral (O. 
faveolata), pillar coral (Dendrogyra cylindrus), and rough cactus coral 
(Mycetophyllia ferox). We have reviewed the available information and 
have used it to identify a composite physical feature essential to the 
conservation of each coral, the specific areas within the occupied 
geographical areas that contain the physical essential feature that may 
require special management considerations or protections, the Federal 
activities that may impact the proposed critical habitat, and the 
potential impacts of designating critical habitat for the corals. The 
economic, national security, and other relevant impacts of the proposed 
critical habitat designations are described in the draft document 
titled, Draft Information Basis and Impact Considerations of Critical 
Habitat Designations for Threatened Caribbean Corals (Draft Information 
Report). This supporting document is available at www.regulations.gov 
or upon request (see ADDRESSES).

Background

    We listed twenty coral species as threatened under the ESA 
effective October 10, 2014 (79 FR 53851, September 10, 2014). Five of 
the corals occur in the Caribbean: Orbicella annularis, O. faveolata, 
O. franksi, Dendrogyra cylindrus, and Mycetophyllia ferox. The final 
listing determinations were all based on the best scientific and 
commercial information available on a suite of demographic, spatial, 
and susceptibility components that influence the species' vulnerability 
to extinction in the face of continuing threats over the foreseeable 
future. All of the species had undergone population declines and are 
susceptible to multiple threats, including: Ocean warming, diseases, 
ocean acidification, ecological effects of fishing, and land-based 
sources of pollution. However, aspects of the species' demography and 
distribution buffer the effects of the threats. We determined that all 
the Caribbean coral species are likely to become endangered throughout 
all of their ranges within a foreseeable future of the next several 
decades as a result of a combination of threats, of which the most 
severe are related to climate change, and we listed them as threatened.
    This proposed rule is based on our Draft Information Report and 
peer review comments on the report. All of the information that we used 
to make our determinations in this proposed rule is contained in that 
report. The Draft Information Report is available on NMFS's Southeast 
Regional Office website at [https://www.fisheries.noaa.gov/resource/document/5-caribbean-coral-proposed-CH-Information-Report and at 
www.regulations.gov, see ADDRESSES].

Natural History

    This section summarizes life history and biological characteristics 
of the five corals to provide context for the identification of the 
physical and biological feature essential for the conservation of these 
species. In this section, we cover several topic areas, including an 
introduction to reef-building corals, reproduction, settlement and 
growth, coral habitat types, and coral reef ecosystems. The amount of 
information available on the life history, reproductive biology, and 
ecology varies for each of the five corals that occur in U.S. waters of 
the Caribbean. We provide specific information for each species where 
possible. In addition, we provide information on the biology and 
ecology of Caribbean corals in general,

[[Page 76303]]

highlighting traits that these five corals share. The information below 
is largely summarized from the final listing rule (79 FR 53852, 
September 10, 2014), and updated with the best scientific information 
available to date.
    Reef-building corals, in the phylum Cnidaria, are marine 
invertebrates that occur as polyps. The Cnidaria include true stony 
corals (class Anthozoa, order Scleractinia), the blue coral (class 
Anthozoa, order Helioporacea), and fire corals (class Hydrozoa, order 
Milleporina). These species secrete massive calcium carbonate skeletons 
that form the physical structure of coral reefs. Reef-building coral 
species collectively produce coral reefs over time when growth outpaces 
erosion. Corals may also occur on hard substrate that is interspersed 
among other benthic features (e.g., seagrass beds in the back reef 
lagoon) in the coral reef ecosystem, but not on the physical structure 
of coral reefs. Corals also contain symbiotic algae within their cells. 
As described below, corals produce clones of themselves by several 
different means, and most corals occur as colonies of polyps.
    Reef-building corals are able to grow and thrive in the 
characteristically nutrient-poor environments of tropical and 
subtropical regions due to their ability to form mutually beneficial 
symbioses with unicellular photosynthetic algae (zooxanthellae) 
belonging to the dinoflagellate genus Symbiodinium living within the 
host coral's tissues. Zooxanthellae provide a food source for their 
host by translocating fixed organic carbon and other nutrients. In 
return, the algae receive shelter and nutrients in the form of 
inorganic waste metabolites from host respiration. This exchange of 
energy, nutrients, and inorganic metabolites allows the symbiosis to 
flourish and helps the coral secrete the calcium carbonate that forms 
the skeletal structure of the coral colony, which in turn contributes 
to the formation of the reef. Thus, reef-building corals are also known 
as zooxanthellate corals. Some corals, which do not contain 
zooxanthellae, form skeletons much more slowly, and therefore are not 
considered reef-building. The five corals discussed in this proposed 
rule are zooxanthellate species, and thus are reef-building species 
that can grow large skeletons that contribute to the physical structure 
of coral reefs.
    Only about 10 percent of the world's approximately 800 reef-
building coral species occur in the Caribbean. The acroporids were once 
the most abundant and most important species on Caribbean coral reefs 
in terms of accretion of reef structure, characterizing the ``palmata'' 
and ``cervicornis'' zones in the classical descriptions of Caribbean 
reefs (Goreau, 1959). The three species (O. annularis, O. faveolata, 
and O. franski) in the Orbicella star coral species complex have also 
been dominant components on Caribbean coral reefs, characterizing the 
``buttress zone'' and ``annularis zone.'' After the die-off of Acropora 
spp., the star coral species complex became the major reef-builder in 
the greater Caribbean due to their large size.
    Most reef-building coral species are colonial, producing colonies 
made up of polyps that are connected through tissue and skeleton. In a 
colonial species, a single larva will develop into a discrete unit (the 
primary polyp) that then produces modular units of itself (i.e., 
genetically-identical copies, or clones, of the primary polyp). Each 
polyp consists of a column with mouth and tentacles on the upper side 
growing on top of a calcium carbonate skeleton that the polyps produced 
through the process of calcification. Colony growth is achieved mainly 
through the addition of more cloned polyps. The colony can continue to 
exist even if numerous polyps die or if the colony is broken apart or 
otherwise damaged. The five corals are all colonial species, although 
polyp size, colony size, and colony morphology vary considerably by 
species, and can also vary based on environmental variables in 
different habitats. Colonies can produce clones, most commonly through 
fragmentation or budding (described in more detail below). The five 
corals are all clonal species with the ability to produce colonies of 
cloned polyps as well as clones of entire colonies. The way they 
produce colony-level clones varies by species. For example, branching 
species are much more likely than encrusting species to produce clones 
via fragmentation.
    Corals use a number of reproductive strategies that have been 
researched extensively; however, many individual species' reproductive 
modes remain poorly described. Most coral species use both sexual and 
asexual propagation. Sexual reproduction in corals is primarily through 
gametogenesis (i.e., development of eggs and sperm within the polyps 
near the base). Some coral species have separate sexes (gonochoric), 
while others are hermaphroditic (individuals simultaneously containing 
both sexes), and others are a combination of both (Richmond, 1997). 
Strategies for fertilization are either by brooding (internal 
fertilization) or broadcast spawning (external fertilization). Asexual 
reproduction in coral species usually occurs by fragmentation, when 
colony pieces or fragments are dislodged from larger colonies to 
establish new colonies, or by the budding of new polyps within a 
colony.
    Depending on the mode of fertilization, coral larvae (called 
planulae) undergo development either mostly within the mother colony 
(brooders) or outside of the mother colony, adrift in the ocean 
(broadcast spawners). In either mode of larval development, larvae 
presumably experience considerable mortality (up to 90 percent or more) 
from predation or other factors prior to settlement and metamorphosis 
(Goreau et al., 1981). Such mortality cannot be directly observed, but 
is inferred from the large number of eggs and sperm spawned versus the 
much smaller number of recruits observed later. Coral larvae are 
relatively poor swimmers; therefore, their dispersal distances largely 
depend on the duration of the pelagic phase and the speed and direction 
of water currents transporting the larvae.
    All three species of the Orbicella star coral species complex are 
hermaphroditic broadcast spawners, spawning over a 3-night period, 6 to 
8 nights following the full moon in late August, September, or early 
October (Levitan et al., 2004). Fertilization success measured in the 
field was generally below 15 percent for all three species and 
correlated to the number of colonies concurrently spawning (Levitan et 
al., 2004). The minimum colony size at first reproduction for the 
Orbicella species complex is 83 cm\2\ (Szmant-Froelich, 1985). 
Successful recruitment by the Orbicella species has seemingly always 
been rare with many studies throughout the Caribbean reporting 
negligible to no recruitment (Bak and Engel, 1979; Hughes and Tanner, 
2000; Rogers et al., 1984; Smith and Aronson, 2006).
    Dendrogyra cylindrus is a gonochoric (having separate sexes) 
broadcast spawning species with relatively low annual egg production 
for its size. The combination of gonochoric spawning with persistently 
low population densities is expected to yield low rates of successful 
fertilization and low larval supply. Spawning has been observed several 
nights after the full moon of August in the Florida Keys (Neely et al., 
2013; Waddell and Clarke, 2008). In Cura[ccedil]ao, D. cylindrus was 
observed to spawn over a 3-night period, 2-5 nights after the full 
moons in August and September (Marhaver et al., 2015). Lab-reared 
embryos developed into swimming planulae larvae within 16 hours after 
spawning and were

[[Page 76304]]

competent to settle relatively soon afterward (Marhaver et al., 2015). 
Despite short duration from spawn to settlement competency in the lab, 
sexual recruitment of this species is low, and there are no reported 
juvenile colonies in the Caribbean (Bak and Engel, 1979; Chiappone, 
2010; Rogers et al., 1984). Dendrogyra cylindrus can propagate by 
fragmentation following storms or other physical disturbance (Hudson 
and Goodwin, 1997). Recent investigations determined that there is no 
genetic differentiation along the Florida Reef Tract, meaning that all 
colonies belong to a single mixed population (Baums et al., 2016). The 
same study found that all sampled colonies from Cura[ccedil]ao belonged 
to a single population that was distinct from the Florida population. 
Similar studies have not been conducted elsewhere in the species' 
range.
    Mycetophyllia ferox is a hermaphroditic brooding species producing 
larvae during the winter months (Szmant, 1986). Brooded larvae are 
typically larger than broadcast spawned larvae and are expected to have 
higher rates of survival once settled. However, recruitment of M. ferox 
appears to be very low, even in studies from the 1970s (Dustan, 1977; 
Rogers and Garrison, 2001).
    Spatial and temporal patterns of coral recruitment are affected by 
substrate availability and community structure, grazing pressure, 
fecundity, mode and timing of reproduction, behavior of larvae, 
hurricane disturbance, physical oceanography, the structure of 
established coral assemblages, and chemical cues. Additionally, several 
other factors may influence reproductive success and reproductive 
isolation, including external cues, genetic precision, and conspecific 
signaling.
    Like most corals, the threatened Caribbean corals require hard, 
consolidated substrate, including attached, dead coral skeleton, for 
their larvae to settle. The settlement location on the substrate must 
be free of macroalgae, turf algae, or sediment for larvae to attach and 
begin growing a colony. Further, the substrate must provide a habitat 
where burial by sediment or overgrowth by competing organisms (i.e., 
algae) will not occur. In general, on proper stimulation, coral larvae 
settle and metamorphose on appropriate hard substrates. Some evidence 
indicates that chemical cues from crustose coralline algae (CCA), 
microbial films, and/or other reef organisms or acoustic cues from reef 
environments stimulate planulae's settlement behaviors. Calcification 
of the newly-settled larva begins with the forming of the basal plate. 
Buds formed on the initial corallite develop into daughter corallites. 
Once larvae have metamorphosed onto appropriate hard substrate, 
metabolic energy is diverted to colony growth and maintenance. Because 
newly settled corals barely protrude above the substrate, juveniles 
need to reach a certain size to limit damage or mortality from threats 
such as grazing, sediment burial, and algal overgrowth. In some 
species, it appears there is virtually no limit to colony size beyond 
structural integrity of the colony skeleton, as polyps apparently can 
bud indefinitely.
    Polyps are the building blocks of colonies, and colony growth 
occurs both by increasing the number of polyps, as well as extending 
the supporting skeleton under each polyp. Reef-building corals combine 
calcium and carbonate ions derived from seawater into crystals that 
form their skeletons. Skeletal expansion rates vary greatly by taxa, 
morphology, location, habitat and other factors. For example, in 
general, branching species (e.g., most Acropora species) have much 
higher skeletal extension rates than massive species (e.g., Orbicella 
species). The energy required to produce new polyps and build calcium 
carbonate skeleton is provided by the symbiotic relationship corals 
have with photosynthetic zooxanthellae. Therefore, corals need light 
for their zooxanthellae to photosynthesize and provide the coral with 
food, and thus also require low turbidity for energy, growth, and 
survival. Lower water clarity sharply reduces photosynthesis in 
zooxanthellae and results in reductions in adult colony calcification 
and survival (79 FR 53852, September 10, 2014). Some additional 
information on the biological requirements for reproduction, 
settlement, and growth is provided below in the Physical or Biological 
Features Essential to Conservation section.
    Coral reefs are fragile ecosystems that exist in a narrow band of 
environmental conditions that allow the skeletons of reef-building 
coral species to grow quickly enough for reef accretion to outpace reef 
erosion. High-growth conditions for reef-building corals include clear, 
warm waters with abundant light, and low levels of nutrients, 
sediments, and freshwater.
    There are several categories of coral reefs: Fringing reefs, 
barrier reefs, patch reefs, platform reefs, and atolls. Despite the 
differences between the reef categories, most fringing reefs, barrier 
reefs, atolls, and platform reefs consist of a reef slope, a reef 
crest, and a back-reef, which in turn are typically characterized by 
distinctive habitats. The characteristics of these habitat types vary 
greatly by reef categories, locations, latitudes, frequency of 
disturbance, etc., and there is also much habitat variability within 
each habitat type. Temporal variability in coral habitat conditions is 
also very high, both cyclically (e.g., from tidal, seasonal, annual, 
and decadal cycles) and episodically (e.g., storms, temperature 
anomalies, etc.). Together, all these factors contribute to the habitat 
heterogeneity of coral reefs.
    The five corals vary in their recorded depth ranges and habitat 
types (Table 1). All five corals generally have overlapping ranges and 
occur throughout the wider-Caribbean. The major variance in their 
distributions occurs at the northern-most extent of their ranges in 
Florida or the Flower Garden Banks (FGB) in the northwest Gulf of 
Mexico. As described below, critical habitat can be designated only in 
areas under U.S. jurisdiction, thus we provide the species' 
distribution in U.S. waters (Table 1).

   Table 1--Distributions of Threatened Caribbean Corals in the United
                                 States
------------------------------------------------------------------------
                                      Depth           U.S. geographic
            Species                distribution         distribution
------------------------------------------------------------------------
Dendrogyra cylindrus..........          1 to 25 m  Southeast Florida
                                                    from Lake Worth
                                                    Inlet in Palm Beach
                                                    County to the Dry
                                                    Tortugas; Puerto
                                                    Rico; USVI; Navassa
                                                    Island.
Mycetophyllia ferox...........          5 to 90 m  Southeast Florida
                                                    from Broward County
                                                    to the Dry Tortugas;
                                                    Puerto Rico; USVI;
                                                    Navassa Island.
Orbicella annularis...........        0.5 to 20 m  Southeast Florida
                                                    from Lake Worth
                                                    Inlet in Palm Beach
                                                    County to the Dry
                                                    Tortugas; FGB;
                                                    Puerto Rico; USVI;
                                                    Navassa Island.
Orbicella faveolata...........        0.5 to 90 m  Southeast Florida
                                                    from St. Lucie Inlet
                                                    in Martin County to
                                                    the Dry Tortugas;
                                                    FGB; Puerto Rico;
                                                    USVI; Navassa
                                                    Island.

[[Page 76305]]

 
Orbicella franksi.............        0.5 to 90 m  Southeast Florida
                                                    from Lake Worth
                                                    Inlet in Palm Beach
                                                    County to the Dry
                                                    Tortugas; FGB;
                                                    Puerto Rico; USVI;
                                                    Navassa Island.
------------------------------------------------------------------------

    The depth ranges in Table 1 are the typical ranges and do not apply 
to the depths in which the species occur at FGB, which are much deeper 
due to the unique setting and conditions at that site.

Critical Habitat Identification and Designations

    The purpose of designating critical habitat is to identify the 
areas that are essential to the species' recovery. Once critical 
habitat is designated, it can contribute to the conservation of listed 
species in several ways, including by identifying areas where Federal 
agencies can focus their section 7(a)(1) conservation programs, and 
helping focus the efforts of other conservation partners, such as 
States and local governments, nongovernmental organizations, and 
individuals (81 FR 7414, February 11, 2016). Designating critical 
habitat also provides a significant regulatory protection by ensuring 
that the Federal government considers the effects of its actions in 
accordance with section 7(a)(2) of the ESA and avoids or modifies those 
actions that are likely to destroy or adversely modify critical 
habitat. This requirement is in addition to the section 7 requirement 
that Federal agencies ensure that their actions are not likely to 
jeopardize the continued existence of ESA-listed species. Critical 
habitat requirements do not apply to citizens engaged in activities on 
private land that do not involve a Federal agency.
    Section 3(5)(A) of the ESA defines critical habitat as (i) the 
specific areas within the geographical area occupied by the species, at 
the time it is listed in accordance with the provisions of section 4 of 
the ESA, on which are found those physical or biological features (I) 
essential to the conservation of the species and (II) which may require 
special management considerations or protections; and (ii) specific 
areas outside the geographical area occupied by the species at the time 
it is listed in accordance with the provisions of section 4 of the ESA, 
upon a determination by the Secretary that such areas are essential for 
the conservation of the species (16 U.S.C. 1532(5)(A)). Conservation is 
defined in section 3 of the ESA as the use of all methods and 
procedures which are necessary to bring any endangered species or 
threatened species to the point at which the measures provided pursuant 
to this chapter are no longer necessary (16 U.S.C. 1532(3)). Therefore, 
critical habitat is the habitat essential for the species' recovery. 
However, section 3(5)(C) of the ESA clarifies that, except in those 
circumstances determined by the Secretary, critical habitat shall not 
include the entire geographical area which can be occupied by the 
threatened or endangered species.
    To identify and designate critical habitat, we considered 
information on the distribution of the five threatened Caribbean 
corals, their major life stages, habitat requirements of those life 
stages, threats to the species, and conservation objectives that can be 
supported by identifiable essential physical or biological features 
(hereafter also referred to as ``PBFs'' or ``essential features''). In 
the final listing rule, ocean warming, diseases, ocean acidification, 
trophic effects of reef fishing, nutrient enrichment, sedimentation, 
and inadequacy of regulatory mechanisms were found to be the main 
threats contributing to the threatened status of all five corals. 
Several other threats also contributed to the species' statuses, but 
were considered to be relatively lower in importance as compared to the 
main threats. Therefore, we evaluated physical and biological features 
of their habitats to determine what features are essential to the 
conservation of each coral.
    Accordingly, our step-wise approach for identifying potential 
critical habitat areas for the threatened corals was to determine: (1) 
The geographical area occupied by each coral at the time of listing; 
(2) the physical or biological features essential to the conservation 
of the corals; (3) whether those features may require special 
management considerations or protection; (4) the specific areas of the 
occupied geographical area where these features occur; and, (5) whether 
any unoccupied areas are essential to the conservation of any of the 
corals.

Geographical Area Occupied by the Species

    ``Geographical area occupied'' in the definition of critical 
habitat is interpreted to mean the entire range of the species at the 
time it was listed, inclusive of all areas they use and move through 
seasonally (50 CFR 424.02; 81 FR 7413, February 11, 2016). The ranges 
of the five threatened corals span the wider-Caribbean, and 
specifically Florida, Puerto Rico, and USVI in the United States (79 FR 
53851, September 10, 2014). We did not consider geographical areas 
outside of the United States, because we cannot designate critical 
habitat areas outside of U.S. jurisdiction (50 CFR 424.12(g)).

Physical or Biological Features Essential to Conservation

    Within the geographical area occupied, critical habitat consists of 
specific areas on which are found those PBFs essential to the 
conservation of the species and that may require special management 
considerations or protection. PBFs essential to the conservation of the 
species are defined as the features that occur in specific areas and 
that are essential to support the life-history needs of the species, 
including water characteristics, soil type, geological features, sites, 
prey, vegetation, symbiotic species, or other features. A feature may 
be a single habitat characteristic, or a more complex combination of 
habitat characteristics. Features may include habitat characteristics 
that support ephemeral or dynamic habitat conditions. Features may also 
be expressed in terms relating to principles of conservation biology, 
such as patch size, distribution distances, and connectivity (50 CFR 
424.02).
    In the final listing rule, we determined that the five corals were 
threatened under the ESA. This means that while the species are not in 
danger of extinction currently, they are likely to become so within the 
next several decades based on their current abundances and trends in 
abundance, distributions, and threats they experience now and in the 
future. Further, the reproductive strategies of the three Caribbean 
Orbicella spp. and Dendrogyra cylindrus present a challenge to 
repopulation after mortality events they have experienced and will 
likely experience in the future. The goal of an ESA listing is to first 
prevent extinction, and then to recover the species so they no longer 
meet the definition of a threatened species and no longer need the 
protections of the

[[Page 76306]]

ESA. One of the first steps in recovery planning we completed after 
listing these coral species was to develop a Recovery Outline that 
contains a Recovery Vision, which describes what the state of full 
recovery looks like for the species. We identified the following 
Recovery Vision for the five corals listed in 2014: Populations of the 
five threatened Caribbean corals should be present across their 
historical ranges, with populations large enough and genetically 
diverse enough to support successful reproduction and recovery from 
mortality events and dense enough to maintain ecosystem function 
(https://www.fisheries.noaa.gov/resource/document/5-caribbean-coral-species-recovery-outline). Recovery of these species will require 
conservation of the coral reef ecosystem through threats abatement to 
ensure a high probability of survival into the future (NMFS, 2015). The 
key conservation objective that facilitates this Recovery Vision, and 
that can be assisted through these critical habitat designations, is 
supporting successful reproduction and recruitment, and survival and 
growth of all life stages, by abating threats to the corals' habitats. 
In the final listing rule, we identified the major threats contributing 
to the five corals' extinction risk: Ocean warming, disease, ocean 
acidification, trophic effects of reef fishing, nutrient enrichment, 
and sedimentation. Five of the six major threats (i.e., all but 
disease) impact corals in part by changing the corals' habitat, making 
it unsuitable for them to carry out the essential functions at all life 
stages. Although it was not considered to be posing a major threat at 
the time of listing, we also identified contaminants as a potential 
threat to each of these corals (79 FR 53852, September 10, 2014). Thus, 
we identify ocean warming, ocean acidification, trophic effects of reef 
fishing, nutrient enrichment, sedimentation, and contaminants as the 
threats to the five corals' habitat that are impeding their recovery. 
Protecting essential features of the corals' habitat from these threats 
will facilitate the recovery of these threatened species.
    We then turned to determining the physical or biological features 
essential to this conservation objective of supporting successful 
reproduction and recruitment, and survival and growth of all life 
stages. There are many physical and biological features that are 
important in supporting the corals' habitat; therefore, we focused on a 
composite habitat feature that supports the conservation objective 
through its relevance to the major threats and threats impeding 
recovery. The essential feature we ultimately identified is sites with 
a complex combination of substrate and water column characteristics 
that support normal functions of all life stages of the corals. Due to 
corals being sessile for almost their entire life cycle, they carry out 
most of their demographic functions in one location. Thus, we have 
identified sites with a combination of certain substrate and water 
column characteristics as the essential feature. A detailed discussion 
of how this feature was determined will follow. Specifically, these 
sites have attributes that determine the quality of the appropriate 
attachment substrate, in association with warm, aragonite-
supersaturated, oligotrophic, clear marine water, which are essential 
to reproduction and recruitment, survival, and growth of all life 
stages of all five species of coral. These sites can be impacted by 
ocean acidification and ocean warming, trophic effects of reef fishing, 
nutrient enrichment, sedimentation, and contamination.
    Based on the best scientific information available we propose the 
following essential physical feature for the five corals:
    Reproductive, recruitment, growth, and maturation habitat. Sites 
that support the normal function of all life stages of the corals are 
natural, consolidated hard substrate or dead coral skeleton free of 
algae and sediment at the appropriate scale at the point of larval 
settlement or fragment reattachment, and the associated water column. 
Several attributes of these sites determine the quality of the area and 
influence the value of the associated feature to the conservation of 
the species:
    (1) Substrate with presence of crevices and holes that provide 
cryptic habitat, the presence of microbial biofilms, or presence of 
crustose coralline algae;
    (2) Reefscape (all the visible features of an area of reef) with no 
more than a thin veneer of sediment and low occupancy by fleshy and 
turf macroalgae;
    (3) Marine water with levels of temperature, aragonite saturation, 
nutrients, and water clarity that have been observed to support any 
demographic function; and
    (4) Marine water with levels of anthropogenically-introduced (from 
humans) chemical contaminants that do not preclude or inhibit any 
demographic function.
    As described in detail in the Draft Information Report, all corals 
require exposed natural consolidated hard substrate for the settlement 
and recruitment of larvae or asexual fragments. Recruitment substrate 
provides the physical surface and space necessary for settlement of 
coral larvae, and a stable environment for metamorphosis of the larvae 
into the primary polyp, growth of juvenile and adult colonies, and re-
attachment of fragments. The substrate must be available at appropriate 
physical and temporal scales for attachment to occur. In other words, 
the attachment location must be available at the physical scale of the 
larva or fragment, and at the temporal scale of when the larva or 
fragment is ``seeking'' recruitment. Larvae can also settle and attach 
to dead coral skeleton (Grober-Dunsmore et al., 2006; Jord[aacute]n-
Dahlgren, 1992).
    A number of features have been shown to influence coral larval 
settlement. Positive cues include the presence of particular species of 
crustose coralline algae (Morse and Morse, 1996; Ritson-Williams et 
al., 2010), microbial biofilms (Sneed et al., 2014; Webster et al., 
2004), and cryptic habitat such as crevices and holes (Edmunds et al., 
2004; Edwards et al., 2014; Nozawa, 2012). Features that negatively 
affect settlement include presence of sediment, turf algae, sediment 
bound in turf algae, and macroalgae (Birrell et al., 2005; Kuffner et 
al., 2006; Richmond et al., 2018; Speare et al., 2019; Vermeij et al., 
2009). While sediment, turf algae, and macroalgae are all natural 
features of the coral reef ecosystem, it is the relative proportion of 
free space versus occupied space that influences recruitment; 
recruitment rate is positively correlated with free space (Connell et 
al., 1997). The recruitment substrate feature is adversely affected by 
four of the major threats to the five corals: Ocean acidification, 
trophic effects of reef fishing, nutrient enrichment, and 
sedimentation.
    The dominance of fleshy macroalgae as major space-occupiers on many 
Caribbean coral reefs impedes the recruitment of new corals. A shift in 
benthic community structure over recent decades from the dominance of 
stony corals to fleshy algae on Caribbean coral reefs is generally 
attributed to the greater persistence of fleshy macroalgae under 
reduced grazing regimes due to human overexploitation of herbivorous 
fishes (Edwards et al., 2014; Hughes, 1994; Jackson et al., 2014) and 
the regional mass mortality of the herbivorous long-spined sea urchin 
in 1983-84 (Hughes et al., 1987). As overall coral cover has declined, 
the absolute area occupied by macroalgae has increased and herbivore 
grazing capacity is spread more thinly across a

[[Page 76307]]

larger relative amount of space (Williams et al., 2001). Further, 
impacts to water quality (principally nutrient input) coupled with low 
herbivore grazing are also believed to enhance fleshy macroalgal 
productivity. Fleshy macroalgae are able to colonize dead coral 
skeleton and other available substrate, preempting space available for 
coral recruitment (McCook et al., 2001; Pastorok and Bilyard, 1985). 
The increasing frequency of coral mortality events, such as the 2014-
2016 global bleaching event, continues to increase the amount of dead 
skeleton available to be colonized by algae.
    The persistence of fleshy macroalgae under reduced grazing regimes 
also negatively impacts CCA growth, potentially reducing settlement 
cues which may reduce settlement of coral larvae (Sharp et al., 2010). 
Most CCA are susceptible to fouling by fleshy algae, particularly when 
herbivores are absent (Steneck, 1986). Patterns observed in St. Croix, 
USVI, also indicate a strong positive correlation between CCA abundance 
and herbivory (Steneck and Testa, 1997). Both turf and macroalgal cover 
increases and CCA cover decreases with reductions in herbivory, which 
may last for a period of time even when herbivores are reintroduced (de 
Ruyter van Steveninck and Bak, 1986; Liddell and Ohlhorst, 1986; Miller 
et al., 1999). The ability of fleshy macroalgae to affect growth and 
survival of CCA has indirect, yet important, impacts on the ability of 
coral larvae to successfully settle and recruit.
    In addition to the direct impacts of ocean acidification on the 
corals from reduced aragonite saturation state (discussed later in this 
section), significant impacts to recruitment habitat are also expected. 
Kuffner et al. (2007) and Jokiel et al. (2008) showed dramatic declines 
in the growth rate of CCA and other reef organisms, and an increase in 
the growth of fleshy algae at atmospheric CO2 levels 
expected later this century. The decrease in CCA growth, coupled with 
rapid growth of fleshy algae, will result in less available habitat and 
more competition for settlement and recruitment of new coral colonies.
    Several studies show that coral recruitment tends to be greater 
when macroalgal biomass is low (Birrell et al., 2008a; Birrell et al., 
2005; Birrell et al., 2008b; Connell et al., 1997; Edmunds et al., 
2004; Hughes, 1985; Kuffner et al., 2006; Rogers et al., 1984; Vermeij, 
2006). In addition to preempting space for coral larvae settlement, 
many fleshy macroalgae produce secondary metabolites with generalized 
toxicity that also may inhibit larval settlement, recruitment, and 
survival (Kuffner and Paul, 2004; Kuffner et al., 2006; Paul et al., 
2011). Furthermore, algal turfs can trap sediments (Kendrick, 1991; 
Nugues and Roberts, 2003a; Purcell and Bellwood, 2001; Purcell, 2000; 
Steneck and Testa, 1997; Wilson and Harrison, 2003), which then creates 
the potential for algal turfs and sediments to act in combination to 
hinder coral settlement (Birrell et al., 2005; Nugues and Roberts, 
2003a). These turf algae-sediment mats also can suppress coral growth 
under high sediment conditions (Nugues and Roberts, 2003b) and may 
gradually kill the marginal tissues of stony corals with which they 
come into contact (Dustan, 1977).
    Coral recruitment habitat is also adversely impacted by sediment 
cover. Sediments enter the reef environment through many processes that 
are natural or anthropogenic in origin, including coastal erosion, 
coastal development, resuspension of bottom sediments, terrestrial 
erosion and run-off, in-water construction, dredging for coastal 
construction projects and navigation purposes, and in-water and beach 
placement of dredge spoils. The rate of sedimentation affects reef 
distribution, community structure, growth rates, and coral recruitment 
(Dutra et al., 2006). Accumulation of sediment can smother living 
corals, cover dead coral skeleton, and exposed hard substrate 
(Erftemeijer et al., 2012; Fabricius, 2005). Sediment accumulation on 
dead coral skeletons and exposed hard substrate reduces the amount of 
available substrate for coral larvae settlement and fragment 
reattachment (Rogers, 1990). The location of larval settlement must be 
free of sediment for attachment to occur (Harrington et al., 2004; 
Mundy and Babcock, 1998).
    The depth of sediments over hard substrate affects the duration 
that the substrate may be unavailable for settlement. The deeper the 
sediment, the longer it may take for natural waves and currents to 
remove the sediment from the settlement substrate. Lirman et al. (2003) 
found sediment depth next to live coral colonies was approximately 1 cm 
deep and significantly lower than mean sediment depth collected 
haphazardly on the reef. Sediment deposition threshold criteria have 
recently been proposed for classifying sediment impacts to reef 
habitats based on threshold values in peer-reviewed studies and new 
modeling approaches (Nelson et al., 2016). Nelson et al. (2016) suggest 
that sediment depth greater than 1 cm represents a significant impact 
to corals, while sediment between 0.5 and 1 cm depth represents a 
moderate impact, with the ability to recover. Nelson et al. (2016) 
identify sediment depth less than 0.5 cm as posing minimal stress to 
corals and settlement habitat.
    Sediment texture also affects the severity of impacts to corals and 
recruitment substrate. Fine grain sediments have greater negative 
effects to live coral tissue and to recruitment substrate (Erftemeijer 
et al., 2012). Accumulation of sediments is also a major cause of 
mortality in coral recruits (Fabricius et al., 2003). In some 
instances, if mortality of coral recruits does not occur under heavy 
sediment conditions, then settled coral planulae may undergo reverse 
metamorphosis and die in the water column (Te, 1992). Sedimentation, 
therefore, impacts the health and survivorship of all life stages 
(i.e., adults, fragments, larvae, and recruits) of corals, in addition 
to adversely affecting recruitment habitat.
    The literature provides several recommendations on maximum 
sedimentation rates for coral reefs (i.e., levels that managers should 
strive to stay under). De'ath and Fabricius (2008) and The Great 
Barrier Reef Marine Park Authority (2010) recommend that sediment 
levels on the Great Barrier Reef (GBR) be less than a mean annual 
sedimentation rate of 3 mg/cm\2\/day, and less than a daily maximum of 
15 mg/cm\2\/day. Rogers (1990) recommends that sediment levels on coral 
reefs globally be less than a mean maximum of 10 mg/cm\2\/day to 
maintain healthy corals, and also notes that moderate to severe effects 
on corals are generally expected at mean maximum sedimentation rates of 
10 to 50 mg/cm\2\/day, and severe to catastrophic effects at >50 mg/
cm\2\/day. Similarly, Erftemeijer et al. (2012) suggest that moderate 
to severe effects to corals are expected at mean maximum sediment 
levels of >10 mg/cm\2\/day, and catastrophic effects at >50 mg/cm\2\/
day. Nelson et al. (2016) suggest that sediment depths of >0.5 cm 
result in substantial stress to most coral species, and that sediment 
depths of >1.0 cm are lethal to most coral species. The above 
generalizations are for coral reef communities and ecosystems, rather 
than individual species.
    Sublethal effects of sediment to corals potentially occur at much 
lower levels than mortality. Sublethal effects include reduced growth, 
lower calcification rates and reduced productivity, bleaching, 
increased susceptibility to diseases, physical damage to coral tissue 
and reef structures (breaking, abrasion), and reduced regeneration from 
tissue damage (see reviews by Fabricius et al., 2005; Erftemeijer et 
al., 2012; Browne et al., 2015; and Rogers, 1990). Erftemeijer et al. 
(2012) states that sublethal effects

[[Page 76308]]

for coral species that are sensitive, intermediate, or tolerant to 
sediment (i.e., most reef-building coral species) occur at mean maximum 
sedimentation rates of between <10 and 200 mg/cm\2\/day, depending on 
species, exposure duration, and other factors.
    Artificial substrates and frequently disturbed ``managed areas'' 
are not essential to coral conservation. Only natural substrates 
provide the quality and quantity of recruitment habitat necessary for 
the conservation of threatened corals. Artificial substrates are 
generally less functional than natural substrates in terms of 
supporting healthy and diverse coral reef ecosystems (Edwards and 
Gomez, 2007; USFWS, 2004). Artificial substrates are man-made or 
introduced substrates that are not naturally occurring to the area. 
Examples include, but are not necessarily limited to, fixed and 
floating structures, such as aids-to-navigation (AToNs), jetties, 
groins, breakwaters, seawalls, wharves, boat ramps, fishpond walls, 
pipes, wrecks, mooring balls, docks, aquaculture cages, and other 
artificial structures. The proposed essential feature does not include 
any artificial substrate. In addition, there are some natural 
substrates that, because of their consistently disturbed nature, also 
do not provide the quality of substrate necessary for the conservation 
of threatened corals. While these areas may provide hard substrate for 
coral settlement and growth over short periods, the periodic nature of 
direct human disturbance renders them poor environments for coral 
growth and survival over time (e.g., they can become covered with 
sediment). Therefore, they are not essential to the conservation of the 
species. Specific areas that may contain these disturbed natural 
substrates are described in the Specific Areas Containing the Essential 
Features within the Geographical Area Occupied by the Species section 
of this proposed rule.
    The substrate characterized previously must be associated with 
water that also supports all life functions of corals that are carried 
out at the site. Water quality conditions fluctuate greatly over 
various spatial and temporal scales in natural reef environments 
(Kleypas et al., 1999). However, certain levels of particular 
parameters (e.g., water clarity, water temperature, aragonite 
saturation) must occur on average to provide the conditions conducive 
to coral growth, reproduction, and recruitment. Corals may tolerate and 
survive in conditions outside these levels, depending on the local 
conditions to which they have acclimatized and the intensity and 
duration of any deviations from conditions conducive to a particular 
coral's growth, reproduction and recruitment. Deviations from tolerance 
levels of certain parameters result in direct negative effects on all 
life stages.
    As described in the Draft Information Report, corals thrive in 
warm, clear, nutrient-poor marine waters with calcium carbonate 
concentrations that allow for symbiont photosynthesis, coral 
physiological processes, and skeleton formation. The water must also 
have low to no levels of contaminants (e.g., heavy metals, chemicals) 
that would interfere with normal functions of all life stages. Water 
quality that supports normal functions of corals is adversely affected 
by ocean warming, ocean acidification, nutrient enrichment, 
sedimentation, and contamination.
    Temperature is a particularly important limiting factor of coral 
habitat. Corals occur in a fairly-wide temperature range across 
geographic locations (15.7 [deg]C-35.5 [deg]C weekly average and 21.7-
29.6 [deg]C annual average; Guan et al., 2015), but only thrive in 
areas with mean temperatures in a fairly-narrow range (typically 25 
[deg]C-29 [deg]C) as indicated by the formation of coral reefs 
(Brainard et al., 2011; Kleypas et al., 1999; Stoddart, 1969; Vaughan, 
1919). Short-term exposures (days) to temperature increases of a few 
degrees (i.e., 3 [deg]C-4 [deg]C increase above climatological mean 
maximum summer temperature) or long-term exposures (several weeks) to 
minor temperature increases (i.e., 1 [deg]C-2 [deg]C above mean maximum 
summer temperature) can cause significant thermal stress and mortality 
to most coral species (Berkelmans and Willis, 1999; Jokiel and Coles, 
1990). In addition to coral bleaching, elevated seawater temperatures 
impair coral fertilization and settlement (Negri and Heyward, 2000; 
Nozawa and Harrison, 2007) and cause increases in coral disease (Jones 
et al., 2004b; Miller et al., 2009). Effects of elevated seawater 
temperatures are well-studied for reef-building corals, and many 
approaches have been used to estimate temperature thresholds for coral 
bleaching and mortality (see reviews by (Baker et al., 2008; 
Berkelmans, 2002; Brown, 1997; Coles and Brown, 2003; Coles and Riegl; 
Jokiel, 2004; Jones, 2008)). The tolerance of corals to temperature is 
species-specific (Barker, 2018; Bruno et al., 2007; Eakin et al., 2010; 
Heron et al., 2010; Ruzicka et al., 2013; Smith and Buddemeier, 1992; 
van Woesik et al., 2011; Vega-Rodriguez et al., 2015) and depends on 
suites of other variables that include acclimation temperature, 
aragonite saturation state, dissolved inorganic nitrogen (Barker, 2018; 
Cunning and Baker, 2013; Fabricius, 2005; Wooldridge, 2013); suspended 
sediments and turbidity (Anthony et al.; Devlin-Durante et al.); trace 
metals such as copper (Kwok et al., 2016; Negri and Hoogenboom, 2011; 
Woods et al., 2016); ultraviolet radiation (Anthony et al., 2007); and 
salinity, nitrates, and phosphates (Negri and Hoogenboom, 2011), among 
other physical, physiological, and chemical stressors (Barker, 2018).
    Ocean warming is one of the most significant threats to the five 
ESA-listed Caribbean corals (Brainard et al., 2011). Mean seawater 
temperatures in reef-building coral habitat in both the Caribbean and 
Indo-Pacific have increased during the past few decades, and are 
predicted to continue to rise between now and 2100 (IPCC, 2013). The 
primary observable coral response to ocean warming is bleaching of 
adult coral colonies, wherein corals expel their symbiotic 
zooxanthellae in response to stress (Brown, 1997). For many corals, an 
episodic increase of only 1 [deg]C-2 [deg]C above the normal local 
seasonal maximum ocean temperature can induce bleaching (Hoegh-Guldberg 
et al., 2007; Jones, 2008; Whelan et al., 2007). Corals can withstand 
mild to moderate bleaching; however, severe, repeated, or prolonged 
bleaching can lead to colony death (Brown, 1997; Whelan et al., 2007). 
Increased sea surface temperatures are occurring more frequently and 
leading to multiple mass bleaching events (Hughes et al., 2017), which 
are reoccurring too rapidly for coral populations to rebound in between 
(Hughes et al., 2018).
    In addition to coral bleaching, other effects of ocean warming 
detrimentally affect virtually every life-history stage in reef-
building corals. Impaired fertilization and developmental abnormalities 
(Negri and Heyward, 2000), mortality, and impaired settlement success 
(Nozawa and Harrison, 2007; Putnam et al., 2008; Randall and Szmant, 
2009) have all been documented. Increased seawater temperature also may 
act synergistically with coral diseases to reduce coral health and 
survivorship (Bruno and Selig, 2007). Coral disease outbreaks often 
have either accompanied or immediately followed bleaching events 
(Brandt and McManus, 2009; Jones et al., 2004a; Lafferty et al., 2004; 
Miller et al., 2009; Muller et al., 2008). Outbreaks also follow 
seasonal patterns of high seawater temperatures (Sato et al., 2009; 
Willis et al., 2004).
    Coles and Brown (2003) defined a general bleaching threshold for 
reef-

[[Page 76309]]

building corals as increases in seawater temperatures of 1-3 [deg]C 
above maximum annual mean temperatures at a given location. GBRMPA 
(2010) defined a general ``trigger value'' for bleaching in reef-
building corals as increases in seawater temperatures of no more than 1 
[deg]C above maximum annual mean temperatures at a given location. 
Because duration of exposure to elevated temperatures determines the 
extent of bleaching, several methods have been developed to integrate 
duration into bleaching thresholds, including the number of days, 
weeks, or months of the elevated temperatures (Berkelmans, 2002; Eakin 
et al., 2009; Goreau and Hayes, 1994; Podesta and Glynn, 1997). NOAA's 
Coral Reef Watch Program utilizes the Degree Heating Week method (Glynn 
& D'Croz, 1990; Eakin et al. 2009), which defines a general bleaching 
threshold for reef-building corals as seawater temperatures of 1 [deg]C 
above maximum monthly mean at a given location for 4 consecutive weeks 
(https://coralreefwatch.noaa. gov/).
    These general thresholds were developed for coral reef communities 
and ecosystems, rather than individual species. Many of these studies 
are community or ecosystem-focused and do not account for species-
specific responses to changes in seawater temperatures, and instead are 
focused on long-term climatic changes and large-scale impacts (e.g., 
coral reef distribution, persistence).
    In summary, temperature deviations from local averages prevent or 
impede successful completion of all life history stages of the listed 
coral species. Identifying temperatures at which the conservation value 
of habitat for listed corals may be affected is inherently complex and 
influenced by taxa, exposure duration, and other factors.
    Carbonate ions (CO32-) are used by many 
marine organisms, including corals, to build calcium carbonate 
skeletons. The mineral form of calcium carbonate used by corals to form 
their skeletons is aragonite. The more carbonate ions dissolved in 
seawater, the easier it is for corals to build their aragonite 
skeletons. The metric used to express the relative availability of 
calcium and carbonate ions is the aragonite saturation state 
([Omega]arg). Thus, the lower the [Omega]arg of seawater, 
the lower the abundance of carbonate ions, and the more energy corals 
have to expend for skeletal calcification, and vice versa (Cohen and 
Holcomb, 2009). At saturation states between 1 and 20, marine organisms 
can create calcium carbonate shells or skeletons using a physiological 
calcifying mechanism and the expenditure of energy. The aragonite 
saturation state varies greatly within and across coral reefs and 
through daily cycles with temperature, salinity, pressure, and 
localized biological processes such as photosynthesis, respiration, and 
calcification by marine organisms (Gray et al., 2012; McMahon et al., 
2013; Shaw et al., 2012b)). Coral reefs form in an annually-averaged 
saturation state of 4.0 or greater for optimal calcification, and an 
annually-averaged saturation state below 3.3 will result in reduced 
calcification at rates insufficient to maintain net positive reef 
accretion, resulting in loss of reef structure (Guinotte et al., 2003; 
Hoegh-Guldberg et al., 2007). Guinotte et al. (2003) classified the 
range of aragonite saturation states between 3.5-4.0 as ``adequate'' 
and < 3 as ``extremely marginal.'' Thus, aragonite saturation state 
between 3 and 4 is likely necessary for coral calcification. But, 
generally, seawater [Omega]arg should be 3.5 or greater to enable 
maximum calcification of reef-building corals, and average [Omega]arg 
in most coral reef areas is currently in that range (Guinotte et al., 
2003). Further, (Kleypas et al., 1999) concluded that a general 
threshold for [Omega]arg occurs near 3.4, because only a few reefs 
occur where saturation is below this level. Guan et al. (2015) found 
that the minimum aragonite saturation observed where coral reefs 
currently occur is 2.82; however, it is not known if those locations 
hosted live, accreting corals. These general characterizations and 
thresholds were identified for coral reef communities and ecosystems, 
rather than individual species.
    Ocean acidification is a term referring to changes in ocean 
carbonate chemistry, including a drop in the pH of ocean waters, that 
is occurring in response to the rise in the quantity of atmospheric 
CO2 and the partial pressure of CO2 
(pCO2) absorbed in oceanic waters (Caldeira and Wickett, 
2003). As pCO2 rises, oceanic pH declines through the 
formation of carbonic acid and subsequent reaction with water resulting 
in an increase of free hydrogen ions. The free hydrogen ions react with 
carbonate ions to produce bicarbonate, reducing the amount of carbonate 
ions available, and thus reducing the aragonite saturation state. Ocean 
acidification is one of the most significant threats to reef-building 
corals (Brainard et al., 2011; Jokiel, 2015).
    A variety of laboratory studies conducted on corals and coral reef 
organisms (Langdon and Atkinson, 2005) consistently show declines in 
the rate of coral calcification and growth with rising pCO2, declining 
pH, and declining carbonate saturation state. Laboratory experiments 
have also shown that skeletal deposition and initiation of 
calcification in newly settled corals is reduced by declining aragonite 
saturation state (Albright et al., 2008; Cohen et al., 2009). Field 
studies from a variety of coral locations in the Caribbean, Indo-
Pacific, and Red Sea have shown a decline in linear extension rates of 
coral skeleton under decreasing aragonite saturation state (Bak et al., 
2009; De'ath et al., 2009; Schneider and Erez, 2006; Tanzil et al., 
2009). In addition to effects on growth and calcification, recent 
laboratory experiments have shown that increased CO2 also 
substantially impairs fertilization and settlement success in Acropora 
palmata (Albright et al., 2010). Reduced calcification and slower 
growth will mean slower recovery from breakage, whether natural 
(hurricanes and storms) or human (breakage from vessel groundings, 
anchors, fishing gear, etc.), or mortality from a variety of 
disturbances. Slower growth also implies even higher rates of mortality 
for newly settled corals due to the longer time it will take to reach a 
colony size that is no longer vulnerable to overgrowth competition, 
sediment smothering, and incidental predation. Reduced calcification 
and slower growth means more time to reach reproductive size and 
reduces sexual and asexual reproductive potential. Increased 
pCO2 coupled with increased sea surface temperature can lead 
to even lower rates of calcification, as found in the meta-analysis by 
Kornder et al. (2018).
    In summary, aragonite saturation reductions prevent or impede 
successful completion of all life history stages of the listed coral 
species. Identifying the declining aragonite saturation state at which 
the conservation value of habitat for listed corals may be affected is 
inherently complex and influenced by taxa, exposure duration, 
acclimatization to localized nutrient regimes, and other factors.
    Nitrogen and phosphorous are two of the main nutrients that affect 
the suitability of the water column in coral reef habitats (Fabricius 
et al., 2005; Fabricius, 2005). These two nutrients occur as different 
compounds in coral reef habitats and are necessary in low levels for 
normal reef function. Dissolved inorganic nitrogen and dissolved 
inorganic phosphorus in the forms of nitrate 
(NO3-) and phosphate 
(PO43-) are particularly important for 
photosynthesis, with dissolved organic nitrogen also providing an 
important source of nitrogen, and are the dominant forms of nitrogen 
and phosphorous in

[[Page 76310]]

coral reef waters. Nutrients are a major component of land-based 
sources of pollution (LBSP), which is one of the most significant 
threats to reef-building corals (Brainard et al., 2011). Excessive 
nutrients affect corals through two main mechanisms: Direct impacts on 
coral physiology, such as reduced fertilization and growth (Harrison 
and Ward, 2001; Ferrier-Pages et al., 2000), and indirect effects 
through nutrient-stimulation of other community components (e.g., 
macroalgae seaweeds, turfs/filamentous algae, cyanobacteria, and filter 
feeders) that compete with corals for space on the reef (79 FR 53851, 
September 10, 2014). As discussed previously, the latter also affects 
the quality of recruitment substrate. The physiological response a 
coral exhibits to an increase in nutrients mainly depends on 
concentration and duration. A short duration of a high increase in a 
nutrient may result in a severe adverse response, just as a chronic, 
lower concentration might. Increased nutrients can result in adverse 
responses in all life stages and affect most physiological processes, 
resulting in reduced number and size of gametes (Ward and Harrison, 
2000), reduced fertilization (Harrison and Ward, 2001), reduced growth, 
mortality (Ferrier-Pages et al., 2000; Koop et al., 2001), increased 
disease progression (Vega Thurber et al., 2013; Voss and Richardson, 
2006), tissue loss (Bruno et al., 2003), and bleaching (Kuntz et al., 
2005; Wiedenmann et al., 2012).
    Most coral reefs occur where annual mean nutrient levels are low. 
Kleypas et al. (1999) analyzed dissolved nutrient data from nearly 
1,000 coral reef sites, finding mean values of 0.25 micromoles per 
liter ([mu]mol/l) for NO3, and 0.13 [mu]mol/l for 
PO4. Over 90 percent of the sites had mean NO3 
values of <0.6 [mu]mol/l, and mean PO4 values of <0.2 
[mu]mol/l (Kleypas et al., 1999). Several authors, including Bell and 
Elmetri (1995) and Lapointe (1997) have proposed threshold values of 
1.0 [mu]mol/l for NO3, and 0.1-0.2 [mu]mol/l for 
PO4, beyond which reefs are assumed to be eutrophic. 
However, concentrations of dissolved nutrients are poor indicators of 
coral reef status, and the concept of a simple threshold concentration 
that indicates eutrophication has little validity (McCook, 1999). One 
reason for that is because corals are exposed to nutrients in a variety 
of forms, including dissolved nitrogen (e.g., NO3), 
dissolved phosphorus (e.g., PO43), particulate nitrogen 
(PN), and particulate phosphate (PP). Since the dissolved forms are 
assimilated rapidly by phytoplankton, and the majority of nitrogen and 
phosphorus discharged in terrestrial runoff is in the particulate 
forms, PN and PP are the most common bio-available forms of nutrients 
for corals on coastal zone reefs (Cooper et al., 2008). De'ath and 
Fabricius (2008) and GBRMPA (2010) provide general recommendations on 
maximum annual mean values for PN and PP of 1.5 [mu]mol/l PN and 0.09 
[mu]mol/l PP for coastal zone reefs. These generalizations are for 
coral reef communities and ecosystems, rather than individual species.
    As noted above, identifying nutrient concentrations at which the 
conservation value of habitat for listed corals may be affected is 
inherently complex and influenced by taxa, exposure duration, and 
acclimatization to localized nutrient regimes, and other factors.
    Water clarity or transparency is a key factor for marine ecosystems 
and it is the best explanatory variable for a range of bioindicators of 
reef health (Fabricius et al., 2012). Water clarity affects the light 
availability for photosynthetic organisms and food availability for 
filter feeders. Corals depend upon their symbiotic algae for nutrition 
and thus depend on light availability for algal photosynthesis. Reduced 
water clarity is determined by the presence of particles of sediment, 
organic matter, and/or plankton in the water, and so is often 
associated with elevated sedimentation and/or nutrients. Water clarity 
can be measured in multiple ways, including percent of solar irradiance 
at depth, Secchi depth (the depth in the water column at which a black 
and white disk is no longer visible), and Nephelometric Turbidity Unit 
(NTU) (measure of light scatter based on particles in the water 
column). Reef-building corals naturally occur across a broad range of 
water clarity levels from very turbid waters on enclosed reefs near 
river mouths (Browne et al., 2012) to very clear waters on offshore 
barrier reefs, and many intermediate habitats such as open coastal and 
mid-shelf reefs (GBRMPA, 2010). Coral reefs appear to thrive in 
extremely clear areas where Secchi depth is >= 15 m or light scatter is 
< 1 NTU (De'ath and Fabricius, 2010). Typical levels of total suspended 
solids (TSS) in reef environments are less than 10 mg/L (Rogers, 1990). 
The minimum light level for reef development is about 6-8 percent of 
surface irradiance (Fabricius et al., 2014).
    For a particular coral colony, tolerated water clarity levels 
likely depend on several factors, including species, life history 
stage, spatial variability, and temporal variability. For example, 
colonies of a species occurring on fringing reefs around high volcanic 
islands with extensive groundwater inputs are likely to be better 
acclimatized or adapted to higher turbidity than colonies of the same 
species occurring on offshore barrier reefs or around atolls with very 
little or no groundwater inputs. In some cases, corals occupy naturally 
turbid habitats (Anthony and Larcombe, 2000; McClanahan and Obura, 
1997; Te, 2001) where they may benefit from the reduced amount of UV 
radiation to which they are exposed (Zepp et al., 2008). As turbidity 
and nutrients increase, thus decreasing water clarity, reef community 
composition shifts from coral-dominated to macroalgae-dominated, and 
ultimately to heterotrophic animals (Fabricius et al., 2012). Light 
penetration is diminished by suspended abiotic and biotic particulate 
matter (esp. clay and silt-sized particles) and some dissolved 
substances (Fabricius et al., 2014). The availability of light 
decreases directly as a function of particle concentration and water 
depth, but also depends on the nature of the suspended particles. Fine 
clays and organic particles are easily suspended from the sea floor, 
reducing light for prolonged periods, while undergoing cycles of 
deposition and resuspension. Suspended fine particles also carry 
nutrients and other contaminants (Fabricius et al., 2013). Increased 
nutrient runoff into semi-enclosed seas accelerates phytoplankton 
production to the point that it also increases turbidity and reduces 
light penetration, and can also settle on colony surfaces (Fabricius, 
2005). In areas of nutrient enrichment, light for benthic organisms can 
be additionally severely reduced by dense stands of large fleshy 
macroalgae shading adjacent corals (Fabricius, 2005).
    The literature provides several recommendations on maximum 
turbidity levels for coral reefs (i.e., levels that managers should 
strive to stay under). GBRMPA (2010) recommends minimum mean annual 
water clarity, or ``trigger values'', in Secchi distances for the GBR 
depending on habitat type: For enclosed coastal reefs, 1.0-1.5 m; for 
open coastal reefs and mid-shelf reefs, 10 m; and for offshore reefs, 
17 m. De'ath and Fabricius (2008) recommend a minimum mean annual water 
clarity trigger value in Secchi distance averaged across all GBR 
habitats of 10 m. Bell and Elmetri (1995) recommend a maximum value of 
3.3 mg/L TSS across all GBR habitats. Thomas et al. (2003) recommend a 
maximum value of 10 mg/L averaged across all Papua New Guinea coral 
reef habitats. Larcombe et al. (2001) recommend a maximum value

[[Page 76311]]

of 40 mg/L TSS for GBR ``marginal reefs'', i.e., reefs close to shore 
with high natural turbidity levels. Guan et al. (2015) recommend a 
minimum light intensity ([mu]mol photons second/m\2\) of 450 [mu]mol 
photons second/m\2\ globally for coral reefs. The above generalizations 
are for coral reef communities and ecosystems, rather than individual 
species.
    A coral's response to a reduction in water clarity is dependent on 
the intensity and duration of the particular conditions. For example, 
corals exhibited partial mortality when exposed to 476 mg/L TSS 
(Bengtsson et al., 1996) for 96 hours, but had total mortality when 
exposed to 1000 mg/L TSS for 65 hours (Thompson and Bright, 1980). 
Depending on the duration of exposure, most coral species exhibited 
sublethal effects when exposed to turbidity levels between 7 and 40 NTU 
(Erftemeijer et al., 2012). The most tolerant coral species exhibited 
decreased growth rates when exposed to 165 mg/L TSS for 10 days (Rice 
and Hunter, 1992). By reducing water clarity, turbidity also reduces 
the maximum depth at which corals can live, making deeper habitat 
unsuitable (Fabricius, 2005). Existing data suggest that coral 
reproduction and settlement are more highly sensitive to changes in 
water clarity than adult survival, and these functions are dependent on 
clear water. Suspended particulate matter reduces fertilization and 
sperm function (Ricardo et al., 2015), and strongly inhibits larvae 
survival, settlement, recruitment, and juvenile survival (Fabricius, 
2005).
    In summary, water clarity deviations from local averages prevent or 
impede successful completion of all life history stages of the listed 
coral species. Identifying turbidity levels at which the conservation 
value of habitat for listed corals may be affected is inherently 
complex and influenced by taxa, exposure duration, and acclimatization 
to localized nutrient regimes, and other factors.
    The water column may include levels of anthropogenically-introduced 
chemical contaminants that prevent or impede successful completion of 
all life history stages of the listed coral species. For the purposes 
of this rule, ``contaminants'' is a collective term to describe a suite 
of anthropogenically-introduced chemical substances in water or 
sediments that may adversely affect corals. The study of the effects of 
contaminants on corals is a relatively new field and information on 
sources and ecotoxicology is incomplete. The major groups of 
contaminants that have been studied for effects to corals include heavy 
metals (also called trace metals), pesticides, and hydrocarbons. Other 
organic contaminants, such as chemicals in personal care products, 
polychlorinated biphenyl, and surfactants, have also been studied. 
Contaminants may be delivered to coral reefs via point or non-point 
sources. Specifically, contaminants enter the marine environment 
through wastewater discharge, shipping, industrial activities, and 
agricultural and urban runoff. These contaminants can cause negative 
effects to coral reproduction, development, growth, photosynthesis, and 
survival.
    Heavy metals (e.g., copper, cadmium, manganese, nickel, cobalt, 
lead, zinc, and iron) can be toxic at concentrations above naturally-
occurring levels. Heavy metals are persistent in the environment and 
can bioaccumulate. Metals are adsorbed to sediment particles, which can 
result in their long distance transport away from sources of pollution. 
Corals incorporate metals in their skeleton and accumulate them in 
their soft tissue (Al-Rousan et al., 2012; Barakat et al., 2015). 
Although heavy metals can occur in the marine environment from natural 
processes, in nearshore waters they are mostly a result of 
anthropogenic sources (e.g., wastewater, antifouling and anticorrosive 
paints from marine vessels and structures, land filling and dredging 
for coastal expansion, maritime activities, inorganic and organic 
pollutants, crude oil pollution, shipping processes, industrial 
discharge, agricultural activities), and are found near cities, ports, 
and industrial developments.
    The effects of copper on corals include physiological impairment, 
impaired photosynthesis, bleaching, reduced growth, and DNA damage 
(Bielmyer et al., 2010; Schwarz et al., 2013). Adverse effects to 
fertilization, larval development, larval swimming behavior, 
metamorphosis, and larval survival have also been documented (Kwok and 
Ang, 2013; Negri and Hoogenboom, 2011; Puisay et al., 2015; Reichelt-
Brushett and Hudspith, 2016; Rumbold and Snedaker, 1997). Toxicity of 
copper was found to be higher when temperatures are elevated (Negri and 
Hoogenboom, 2011). Nickel and cobalt can also have negative effects on 
corals, such as reduced growth and photosynthetic rates (Biscere et 
al., 2015), and reduced fertilization success (Reichelt-Brushett and 
Hudspith, 2016). Chronic exposure of corals to higher levels of iron 
may significantly reduce growth rates (Ferrier-Pages et al., 2001). 
Further, iron chloride has been found to cause oxidative DNA damage to 
coral larvae (Vijayavel et al., 2012).
    Polycyclic aromatic hydrocarbons (PAHs) are found in fossil fuels 
such as oil and coal and can be produced by the incomplete combustion 
of organic matter. PAHs disperse through non-point sources such as road 
run-off, sewage, and deposition of particulate air pollution. PAHs can 
also disperse from point sources such as oil spills and industrial 
sites. Studies have found adverse effects of oil pollution on corals 
that include growth impairments, mucus production, and decreased 
reproduction, especially at increased temperature (Kegler et al., 
2015). Hydrocarbons have also been found to affect early life stages of 
corals. Oil-contaminated seawater reduced settlement of O. faveolata 
and of Agaricia humilis and was more severe than any direct or latent 
effects on survival (Hartmann et al., 2015). Natural gas (water 
accommodated fraction) exposure resulted in abortion of larvae during 
early embryogenesis and early release of larvae during late 
embryogenesis, with higher concentrations of natural gas yielding 
higher adverse effects (Villanueva et al., 2011). Exposure to oil, 
dispersants, and a combination of oil and dispersant significantly 
decreased settlement and survival of Porites astreoides and Orbicella 
faveolata larvae (Goodbody-Gringley et al., 2013).
    Anthracene (a PAH that is used in dyes, wood preservatives, 
insecticides, and coating materials) exposure to apparently healthy 
fragments and diseased fragments (Caribbean yellow band disease) of O. 
faveolata reduced activity of enzymes important for protection against 
environmental stressors in the diseased colonies (Montilla et al., 
2016). The results indicated that diseased tissues might be more 
vulnerable to exposure to PAHs such as anthracene compared to healthy 
corals. PAH concentrations similar to those present after an oil spill 
inhibited metamorphosis of Acropora tenuis larvae, and sensitivity 
increased when larvae were co-exposed to PAHs and ``shallow reef'' 
ultraviolet (UV) light levels (Negri et al., 2016).
    Pesticides include herbicides, insecticides, and antifoulants used 
on vessels and other marine structures. Pesticides can affect non-
target marine organisms like corals and their zooxanthellae. Diuron, an 
herbicide, decreased photosynthesis in zooxanthellae that had been 
isolated from the coral host and grown in culture (Shaw et al., 2012a). 
Irgarol, an additive in copper-based antifouling paints, significantly 
reduced settlement in

[[Page 76312]]

Porites hawaiiensis (Knutson et al., 2012). Porites astreoides larvae 
exposed to two major mosquito pesticide ingredients, naled and 
permethrin, for 18-24 hours showed differential responses. 
Concentrations of 2.96 [micro]g/L or greater of naled significantly 
reduced larval survivorship, while exposure of up to 6.0 [micro]g/L of 
permethrin did not result in reduced larval survivorship. Larval 
settlement, post-settlement survival, and zooxanthellae density were 
not impacted by any treatment (Ross et al., 2015).
    Benzophenone-2 (BP-2) is a chemical additive to personal care 
products (e.g., sunscreen, shampoo, body lotions, soap, detergents), 
product coatings (oil-based paints, polyurethanes), acrylic adhesives, 
and plastics that protects against damage from UV light. It is released 
into the ocean through municipal and boat/ship wastewater discharges, 
landfill leachates, residential septic fields, and unmanaged cesspits 
(Downs et al., 2014). BP-2 is a known endocrine disruptor and a DNA 
mutagen, and its effects are worse in the light. It caused deformation 
of scleractinian coral Stylophora pistillata larvae, changing them from 
a motile planktonic state to a deformed sessile condition at low 
concentrations (Downs et al., 2014). It also caused increasing larval 
bleaching with increasing concentration (Downs et al., 2014). 
Benzophenone-3 (BP-3; oxybenzone) is an ingredient in sunscreen and 
personal care products (e.g., hair cleaning and styling products, 
cosmetics, insect repellent, soaps) that protects against damage from 
UV light. It enters the marine environment through swimmers and 
municipal, residential, and boat/ship wastewater discharges and can 
cause DNA mutations. Oxybenzone is a skeletal endocrine disruptor, and 
it caused larvae of S. pistillata to encase themselves in their own 
skeleton (Downs et al., 2016). Exposure to oxybenzone transformed S. 
pistillata larvae from a motile state to a deformed, sessile condition 
(Downs et al., 2016). Larvae exhibited an increasing rate of coral 
bleaching in response to increasing concentrations of oxybenzone (Downs 
et al., 2016).
    Polychlorinated biphenyls (PCBs) are environmentally stable, 
persistent organic contaminants that have been used as heat exchange 
fluids in electrical transformers and capacitors and as additives in 
paint, carbonless copy paper, and plastics. They can be transported 
globally through the atmosphere, water, and food chains. A study of the 
effects of the PCB, Aroclor 1254, on the Stylophora pistillata found no 
effects on coral survival, photosynthesis, or growth; however, the 
exposure concentration and duration may alter the expression of certain 
genes involved in various important cellular functions (Chen et al., 
2012).
    Surfactants are used as detergents and soaps, wetting agents, 
emulsifiers, foaming agents, and dispersants. Linear alkylbenzene 
sulfonate (LAS) is one of the most common surfactants in use. 
Biodegradation of surfactants can occur within a few hours up to 
several days, but significant proportions of surfactants attach to 
suspended solids and remain in the environment. This sorption of 
surfactants onto suspended solids depends on environmental factors such 
as temperature, salinity, or pH. Exposure of Pocillopora verrucosa to 
LAS resulted in tissue loss on fragments (Kegler et al., 2015). The 
combined effects of LAS exposure with increased temperature (+3 [deg]C, 
from 28 to 31 [deg]C) resulted in greater tissue loss than LAS exposure 
alone (Kegler et al., 2015).
    In summary, there are multiple chemical contaminants that prevent 
or impede successful completion of all life history stages of the 
listed coral species. Identifying contaminant levels at which the 
conservation value of habitat for listed corals may be affected is 
inherently complex and influenced by taxa, exposure duration, and other 
factors.
    As described above, the best-available information shows coral 
reefs form on solid substrate but only within a narrow range of water 
column conditions that on average allow the deposition rates of corals 
to exceed the rates of physical, chemical, and biological erosion 
(i.e., conducive conditions, Brainard et al., 2005). However, as with 
all ecosystems, water column conditions are dynamic and vary over space 
and time. Therefore, we also describe environmental conditions in which 
coral reefs currently exist globally, thus indicating the conditions 
that may be tolerated by corals and allow at least for survival. To the 
extent tolerance conditions deviate in duration and intensity from 
conducive conditions, they may not support coral reproduction and 
recruitment, and reef growth, and thus would impair recovery of the 
species. Further, annually and spatially averaged-tolerance ranges 
provide the limits of the environmental conditions in which coral reefs 
exist globally (Guan et al., 2015), but these conditions do not 
necessarily represent the conditions that may be tolerated by 
individual coral species. Individual species may or may not be able to 
withstand conditions within or exceeding the globally-averaged 
tolerance ranges for coral reefs, depending on the individual species' 
biology, local average conditions to which the species are 
acclimatized, and intensity and duration of exposure to adverse 
conditions. In other words, changes in the water column parameters 
discussed above that exceed the tolerance ranges may induce adverse 
effects in a particular species. Thus, the concept of individual 
species' tolerance limits is a different aspect of water quality 
conditions compared to conditions that are conducive for formation and 
growth of reef structures.
    These values presented in the summaries above constitute the best 
available information at the time of this rulemaking. It is possible 
that future scientific research will identify species-specific values 
for some of these parameters that become more applicable to the five 
listed coral species, though it is also possible that future species-
specific research will document that conducive or tolerance ranges for 
the five Caribbean corals fall within these ranges. Because the ESA 
requires us to use the best scientific information available in 
conducting consultations under section 7, we will incorporate any such 
new scientific information into consultations when evaluating potential 
impacts to the critical habitat.

Need for Special Management Considerations or Protection

    Specific areas within the geographical area occupied by a species 
may be designated as critical habitat only if they contain essential 
features that may require special management considerations or 
protection (16 U.S.C. 1532(5)(A)(i)(II). Special management 
considerations or protection are any methods or procedures useful in 
protecting physical or biological features for the conservation of 
listed species (50 CFR 424.02).
    The proposed essential feature is particularly susceptible to 
impacts from human activity because of the relatively shallow water 
depth range (less than 295 ft (90 m)) the corals inhabit. The proximity 
of this habitat to coastal areas subjects this feature to impacts from 
multiple activities, including, but not limited to, coastal and in-
water construction, dredging and disposal activities, beach 
nourishment, stormwater run-off, wastewater and sewage outflow 
discharges, point and non-point source discharges of contaminants, and 
fishery management. Further, the global oceans are being impacted by 
climate change from greenhouse gas emissions, particularly the tropical 
oceans in which the Caribbean corals occur (van Hooidonk et al., 2014). 
The impacts from these activities, combined with those from

[[Page 76313]]

natural factors (e.g., major storm events), significantly affect 
habitat for all life stages for these threatened corals. We conclude 
that the essential feature is currently and will likely continue to be 
negatively impacted by some or all of these factors.
    Greenhouse gas emissions (e.g., fossil fuel combustion) lead to 
global climate change and ocean acidification. These activities 
adversely affect the essential feature by increasing sea surface 
temperature and decreasing the aragonite saturation state. Coastal and 
in-water construction, channel dredging, and beach nourishment 
activities can directly remove the essential feature by dredging it or 
by depositing sediments on it, making it unavailable for settlement and 
recruitment of coral larvae or fragments. These same activities can 
impact the essential feature by creating turbidity during operations. 
Stormwater run-off, wastewater and sewage outflow discharges, and point 
and non-point source contaminant discharges can adversely impact the 
essential feature by allowing nutrients and sediments, as well as 
contaminants, from point and non-point sources, including sewage, 
stormwater and agricultural runoff, river discharge, and groundwater, 
to alter the natural levels in the water column. The same activities 
can also adversely affect the essential feature by increasing the 
growth rates of macroalgae, allowing them to preempt available 
recruitment habitat. Fishery management can adversely affect the 
essential feature if it allows for the reduction in the number of 
herbivorous fishes available to control the growth of macroalgae on the 
substrate.
    Given these ongoing threats throughout the corals' habitat, we find 
that the essential feature may require special management 
considerations.

Specific Areas Containing the Essential Features Within the 
Geographical Area Occupied by the Species

    The definition of critical habitat requires us to identify specific 
areas on which are found the physical or biological features essential 
to the species' conservation that may require special management 
considerations or protection. Our regulations state that critical 
habitat will be shown on a map, with more-detailed information 
discussed in the preamble of the rulemaking documents in the Federal 
Register, which will reference each area by the State, county, or other 
local governmental unit in which it is located (50 CFR 424.12(c)). Our 
regulations also state that when several habitats, each satisfying 
requirements for designation as critical habitat, are located in 
proximity to one another, an inclusive area may be designated as 
critical habitat (50 CFR 424.12(d)).
    Within the geographical areas occupied by each of the five corals 
in U.S. waters, at the time of listing, there are five or six broad 
areas in which the essential feature occurs. For each of the five 
corals, boundaries of specific areas were determined by each coral's 
commonly occupied minimum and maximum depth ranges within each coral's 
specific geographic distribution. Across all five coral species, a 
total of 28 specific areas were identified as being under consideration 
for critical habitat designation. There are five or six specific areas 
per species, depending on whether it occurs in FGB; one each in 
Florida, Puerto Rico, St. Thomas and St. John, USVI, St. Croix, USVI, 
FGB, and Navassa Island. Within each of these areas, the individual 
species' specific areas are largely-overlapping. For example, in Puerto 
Rico, there are five largely-overlapping specific areas, one for each 
species, that surround each of the islands. The difference between each 
of the areas is the particular depth contours that were used to create 
the boundaries. For example, Dendrogyra cylindrus' specific area in 
Puerto Rico extends from the 1-m contour to the 25-m contour, which 
mostly overlaps the Orbicella annularis specific area that extends from 
the 0.5-m contour to the 20-m contour. Overlaying all of the specific 
areas for each species results in the maximum geographic extent of the 
areas under consideration for designation, which covers 0.5-90 m (1.6 
to 295-ft) water depth around all the islands of Puerto Rico, USVI, and 
Navassa, FGB, and from St. Lucie Inlet, Martin County to Dry Tortugas, 
Florida.
    To these specific areas, we reviewed available species occurrence, 
bathymetric, substrate, and water quality data. We used the highest 
resolution bathymetric data available from multiple sources depending 
on the geographic location. In Florida and the FGB, we used contours 
created from National Ocean Service Hydrographic Survey Data and NOAA 
ENCDirect bathymetric point data (NPS) and contours created from NOAA's 
Coastal Relief Model. In Puerto Rico, contours were derived from the 
National Geophysical Data Center's (NGDC) 2005 U.S. Coastal Relief 
Model. In USVI, we used contours derived from NOAA's 2004-2015 
Bathymetric Compilation. In Navassa, contours were derived from NOAA's 
NGDC 2006 bathymetric data. These bathymetric data (i.e., depth 
contours) were used with other geographic or management boundaries to 
draw the boundaries of each specific area on the maps in the proposed 
critical habitat designations.
    Within the areas bounded by depth and species occurrence, we 
evaluated available data on the essential feature. For substrate, we 
used information from the NCCOS Benthic Habitat Mapping program that 
provides data and maps at https://products.coastalscience.noaa.gov/collections/benthic/default.aspx and the Unified Florida Reef Tract Map 
found at https://myfwc.com/research/gis/regional-projects/unified-reef-map/. Using GIS software, we extracted all habitat classifications that 
could be considered potential recruitment habitat, including hardbottom 
and coral reef. The benthic habitat information assisted in identifying 
any major gaps in the distribution of the substrate essential feature. 
The data show that hard substrate is unevenly distributed throughout 
the ranges of the species. However, there are large areas where benthic 
habitat characterization data are still lacking, particularly deeper 
than 30 m (99 ft). Therefore, we made assumptions that the substrate 
feature does exist in those areas, though in unknown quantities, 
because the species occur there. The available data also represent a 
snapshot in time, while the exact location of the habitat feature may 
change over time (e.g., natural sediment movement covering or exposing 
hard substrate).
    There are areas within the geographical and depth ranges of the 
species that contain natural hard substrates that, due to their 
consistently disturbed nature, do not provide the quality of substrate 
essential for the conservation of threatened corals. These disturbances 
may be naturally occurring or caused by human activities. While these 
areas may provide hard substrate for coral settlement and growth over 
short periods, the periodic nature of direct human disturbance renders 
them poor habitat for coral growth and survival over time. These 
``managed areas,'' for the purposes of this proposed rule, are specific 
areas where the substrate has been persistently disturbed by planned 
management activities authorized by local, state, or Federal 
governmental entities at the time of critical habitat designation, and 
expectations are that the areas will continue to be periodically 
disturbed by such management activities. Examples include, but are not 
necessarily limited to, dredged navigation channels, vessel berths, and 
active anchorages. These managed areas are not under consideration for 
critical habitat designation.

[[Page 76314]]

    NMFS is aware that dredging may result in sedimentation impacts 
beyond the actual dredge channel. To the extent that these impacts are 
persistent, are expected to recur whenever the channel is dredged and 
are of such a level that the areas in question have already been made 
unsuitable for coral, then NMFS expects that the federal action agency 
can assess and identify such areas during their pre-dredging planning 
and provide their rationale and information supporting this conclusion. 
To the extent that the federal action agency does so, NMFS proposes 
that these persistently impacted areas be considered part of the 
managed areas and excluded from critical habitat.
    GIS data of the locations of some managed areas were available and 
extracted from the maps of the specific areas being considered for 
critical habitat designation. These data were not available for every 
managed area; however, regardless of whether the managed area is 
extracted from the maps depicting the specific areas being proposed as 
critical habitat, no managed areas are part of the specific areas that 
contain the essential feature.
    The nearshore surf zones of Martin, Palm Beach, Broward, and Miami-
Dade Counties are also consistently disturbed by naturally-high 
sediment movement, suspension, and deposition levels. Hard substrate 
areas found within these nearshore surf zones are ephemeral in nature 
and are frequently covered by sand, and the threatened coral species 
have never been observed there. Thus, this area (water in depths from 0 
ft to 6.5 ft [0 m to 2 m] offshore St. Lucie Inlet to Government Cut) 
does not contain the essential feature and is not considered part of 
the specific areas under consideration for critical habitat. The 
shallow depth limit (i.e., inshore boundary) was identified based on 
the lack of these or any reef building corals occurring in this zone, 
indicating conditions are not suitable for their settlement and 
recruitment into the population. These conditions do not exist in the 
area south of Government Cut, nor in the nearshore zones around the 
islands of Puerto Rico and the U.S. Virgin Islands. In these areas the 
hydrodynamics allow for the growth of some (e.g., Orbicella spp.) of 
the threatened coral in the shallow depths.
    Due to the ephemeral nature of conditions within the water column 
and the various scales at which water quality data are collected, this 
aspect of the essential feature is difficult to map at fine spatial or 
temporal scales. However, annually-averaged plots of temperature, 
aragonite saturation, nitrate, phosphate, and light, at relatively 
large spatial scale (e.g., 1[deg] X 1[deg] grid) are available from 
Guan et al. (2015), using 2009 data for some parameters, and updated 
with newer data from the World Ocean Atlas (2013) for temperature and 
nutrients. Those maps indicate that conditions that support coral reef 
growth, and thus coral demographic functions, occur throughout the 
specific areas under consideration.
    Based on the available data, we identified 28 mostly-overlapping 
specific areas that contain the essential feature. The units can 
generally be grouped as the: (1) Florida units, (2) Puerto Rico units, 
(3) St. Thomas/St. John units (STT/STJ), (4) St. Croix units, (5) 
Navassa units, and (6) FGB units. Within each group of units, each 
species has its own unique unit that is specific to its geographic and 
depth distributions. Therefore, within a group there are five mostly-
overlapping units--one for each species. The exception is that there 
are only three completely-overlapping units in the FGB group, because 
only the three species of Orbicella occur there. The essential feature 
is unevenly distributed throughout these 28 specific areas. Within 
these areas there exists a mosaic of habitats at relatively small 
spatial scales, some of which naturally contain the essential features 
(e.g., coral reefs) and some of which do not (e.g., seagrass beds). 
Further, within these large areas, specific managed areas and naturally 
disturbed areas, as described above, also exist. Due to the spatial 
scale at which the essential feature exists interspersed with these 
other habitats and disturbed areas, we are not able to more discretely 
delineate the specific areas under consideration for critical habitat 
designation.

Unoccupied Critical Habitat Areas

    ESA section 3(5)(A)(ii) defines critical habitat to include 
specific areas outside the geographical area occupied by the species at 
the time of listing if the areas are determined by the Secretary to be 
essential for the conservation of the species. Our regulations at 50 
CFR 424.12(b)(2) further explain that unoccupied areas shall only be 
designated after determining that occupied areas are inadequate to 
ensure the conservation of the species, and the unoccupied areas are 
reasonably certain to contribute to the conservation of the species and 
contain one or more essential feature.
    The threats to these five corals are generally the same threats 
affecting coral reefs throughout the world (climate change, fishing, 
and land-based sources of pollution) and are fully described in the 
final listing rule (79 FR 53852, September 10, 2014). Specifically, 
ocean warming, disease, and ocean acidification are the three most 
significant threats that will impact the potential for recovery of all 
the listed coral species. Because the primary threats are global in 
nature, adapting to changing conditions will be critical to the 
species' conservation and recovery.
    We issued guidance in June 2016 on the treatment of climate change 
uncertainty in ESA decisions, which addresses critical habitat 
specifically (https://www.fisheries.noaa.gov/national/endangered-species-conservation/endangered-species-act-guidance-policies-and-regulations). The guidance states that, when designating critical 
habitat, NMFS will consider proactive designation of unoccupied habitat 
as critical habitat when there are adequate data to support a 
reasonable inference that the habitat is essential for the conservation 
of the species because of the function(s) it is likely to serve as 
climate changes. Further, we will only consider unoccupied areas to be 
essential where a critical habitat designation limited to geographical 
areas occupied would be inadequate to ensure the conservation of the 
species (50 CFR 424.12(b)(2). We specifically address this 
consideration for threatened Caribbean corals in this section.
    All five corals occur in the Caribbean, an area predicted to have 
more rapid and severe impacts from climate change (van Hooidonk et al., 
2014). Shifting into previously unoccupied habitats that become more 
suitable as other parts of their range become less suitable may be a 
strategy these corals employ in the future to adapt to changing 
conditions. However, due to the nature of the Caribbean basin, there is 
little opportunity for range expansion. The only area of potential 
expansion is north up the Florida coast. Several of the five coral 
species have different northern limits to their current range, with 
Orbicella faveolata's limit at St. Lucie Inlet, Martin County, Florida, 
being the farthest north and at the limit of coral reef formation in 
Florida for these species. A northern range expansion along Florida's 
coast beyond this limit is unlikely due to lack of evidence of 
historical reef growth under warmer climates. Further, northern 
expansion is inhibited by hydrographic conditions (Walker and Gilliam, 
2013). The other corals could theoretically expand into the area 
between their current northern extents to the limit of reef formation. 
However, temperature is not likely the factor limiting occupation of 
those areas, given the presence of other reef-

[[Page 76315]]

building corals. Thus, there are likely other non-climate-related 
factors limiting the northern extent of the corals' ranges.
    Because the extent of the proposed critical habitat designations is 
the entire occupied areas of the species, we believe that the 
designations are adequate to provide for the conservation of the five 
corals. Further, no unoccupied areas exist that would add to the 
conservation of the five corals. Therefore, we are not considering any 
unoccupied areas for designation of critical habitat for the five 
corals.

Application of ESA Section 4(a)(3)(B)(i) (Military Lands)

    Section 4(a)(3)(B)(i) of the ESA prohibits designating as critical 
habitat any lands or other geographical areas owned or controlled by 
the Department of Defense (DoD), or designated for its use, that are 
subject to an Integrated Natural Resources Management Plan (INRMP) 
prepared under section 101 of the Sikes Act (16 U.S.C. 670a), if the 
Secretary determines in writing that such plan provides a benefit to 
the species for which critical habitat is proposed for designation. Our 
regulations at 50 CFR 424.12(h) provide that, in determining whether an 
applicable benefit is provided, we will consider:
    (1) The extent of the area and features present;
    (2) The type and frequency of use of the area by the species;
    (3) The relevant elements of the INRMP in terms of management 
objectives, activities covered, and best management practices, and the 
certainty that the relevant elements will be implemented; and
    (4) The degree to which the relevant elements of the INRMP will 
protect the habitat from the types of effects that would be addressed 
through a destruction-or-adverse-modification analysis.
    Naval Air Station Key West (NASKW) is the only installation 
controlled by the DoD, specifically the Department of the Navy (Navy), 
that coincides with any of the areas under consideration for critical 
habitat. On September 21, 2015, the Navy requested in writing that the 
areas covered by the 2014 INRMP for NASKW not be designated as critical 
habitat, pursuant to ESA section 4(a)(3)(B)(i), and provided the INRMP 
for our review.
    The NASKW INRMP covers the lands and waters--generally out to 50 
yards (45.7 m)--adjacent to NASKW, including several designated 
restricted areas (see INRMP figures C-1 through C-14). The total area 
of the waters covered by the INRMP that overlaps with areas considered 
for the proposed critical habitat is approximately 800 acres. Within 
this area, four of the threatened corals (D. cylindrus, O. annularis, 
O. faveolata, and O. franksi) and the proposed essential feature are 
present in densities and proportions similar to those throughout the 
rest of the nearshore habitat in the Florida Keys. The species use this 
area in the same way that they do all areas proposed for critical 
habitat--to carry out all life functions. As detailed in Chapter 4 and 
Appendix C of the INRMP, the plan provides benefits to the threatened 
corals and existing Acropora critical habitat through the following 
NASKW broad programs and activities: (1) Erosion control--which will 
prevent sediments from entering into the water; (2) Boca Chica Clean 
Marina Designation--which eliminates or significantly reduces the 
release of nutrients and contaminants; (3) stormwater quality 
improvements--which prevent or reduce the amount of nutrients, 
sediments, and contaminants; and (4) wastewater treatment--which 
reduces the release of nutrients and contaminants consistent with 
Florida Surface Water Quality Standards. Within these categories, there 
are 15 specific management activities and projects that provide benefit 
to the corals and their habitat (see Table 4-2 of the INRMP). These 
types of best management practices have been ongoing at NASKW since 
1983; thus, they are likely to continue into the future. Further, the 
plan specifically provides assurances that all NASKW staff have the 
authority and funding (subject to appropriations) to implement the 
plan. The plan also provides assurances that the conservation efforts 
will be effective through annual reviews conducted by state and Federal 
natural resource agencies. These activities provide a benefit to the 
species and the identified essential feature in the proposed critical 
habitat designations by reducing sediment and nutrient discharges into 
nearshore waters, which addresses some of the particular conservation 
and protection needs that critical habitat would afford. These 
activities are similar to those that we describe below as project 
modifications for avoiding or reducing adverse effects to the proposed 
critical habitat. Therefore, were we to consult on the activities in 
the INRMP that may affect the proposed critical habitat, we would 
likely not require any project modifications based on best management 
practices in the INRMP. Further, the INRMP includes provisions for 
monitoring and evaluating conservation effectiveness, which will ensure 
continued benefits to the species. Annual reviews of the INRMP for 
2011-2015 found that the INRMP executions, including actions that 
minimize or eliminate land-based sources of pollution, ``satisfied'' or 
``more than satisfied'' conservation objectives. We believe the NASKW 
INRMP provides the types of benefits to the threatened corals described 
in our regulations (50 CFR 424.12(h)).
    Four (D. cylindrus, O. annularis, O. faveolata, and O. franksi) of 
the five corals' specific areas overlap with NASKW, based on the depth 
in which the species occur and the distance from shore covered by 
NASKW's INRMP. Therefore, pursuant to section 4(a)(3)(B)(i) of the ESA, 
we determined that the INRMP provides a benefit to those threatened 
corals, and we are not designating critical habitat within the 
boundaries covered by the INRMP.

Application of ESA Section 4(b)(2)

    Section 4(b)(2) of the ESA requires that we consider the economic 
impact, impact on national security, and any other relevant impact, of 
designating any particular area as critical habitat. Additionally, the 
Secretary has the discretion to consider excluding any area from 
critical habitat if (s)he determines, based upon the best scientific 
and commercial data available, the benefits of exclusion (that is, 
avoiding some or all of the impacts that would result from designation) 
outweigh the benefits of designation. The Secretary may not exclude an 
area from designation if exclusion will result in the extinction of the 
species. Because the authority to exclude is discretionary, exclusion 
is not required for any particular area under any circumstances.
    The ESA provides the U.S. Fish and Wildlife Service (USFWS) and 
NMFS (the Services) with broad discretion in how to consider impacts. 
(See, H.R. Rep. No. 95-1625, at 17, reprinted in 1978 U.S.C.C.A.N. 
9453, 9467 (1978). Economics and any other relevant impact shall be 
considered by the Secretary in setting the limits of critical habitat 
for such a species. The Secretary is not required to give economics or 
any other relevant impact predominant consideration in his 
specification of critical habitat. The consideration and weight given 
to any particular impact is completely within the Secretary's 
discretion.). Courts have noted the ESA does not contain requirements 
for any particular methods or approaches. (See, e.g., Bldg. Indus. 
Ass'n of the Bay Area et al. v. U.S. Dept. of Commerce et al., No. 13-
15132 (9th Cir., July 7, 2015),

[[Page 76316]]

upholding district court's ruling that the ESA does not require the 
agency to follow a specific methodology when designating critical 
habitat under section 4(b)(2)). For this proposed rule, we followed the 
same basic approach to describing and evaluating impacts as we have for 
several recent critical habitat rulemakings, as informed by our Policy 
Regarding Implementation of Section 4(b)(2) of the ESA (81 FR 7226, 
February 11, 2016).
    The following discussion of impacts is summarized from our Draft 
Information Report, which identifies the economic, national security, 
and other relevant impacts that we projected would result from 
including each of the specific areas in the proposed critical habitat 
designations. We considered these impacts when deciding whether to 
exercise our discretion to propose excluding particular areas from the 
designations. Both positive and negative impacts were identified and 
considered (these terms are used interchangeably with benefits and 
costs, respectively). Impacts were evaluated in quantitative terms 
where feasible, but qualitative appraisals were used where that is more 
appropriate to particular impacts.
    The primary impacts of a critical habitat designation result from 
the ESA section 7(a)(2) requirement that Federal agencies ensure their 
actions are not likely to result in the destruction or adverse 
modification of critical habitat, and that they consult with NMFS in 
fulfilling this requirement. Determining these impacts is complicated 
by the fact that section 7(a)(2) also requires that Federal agencies 
ensure their actions are not likely to jeopardize the species' 
continued existence. One incremental impact of designation is the 
extent to which Federal agencies modify their proposed actions to 
ensure they are not likely to destroy or adversely modify the critical 
habitat beyond any modifications they would make because of listing and 
the requirement to avoid jeopardy to listed corals. When the same 
modification would be required due to impacts to both the species and 
critical habitat, there would be no additional or incremental impact 
attributable to the critical habitat designation beyond the 
administrative impact associated with conducting the critical habitat 
analysis. Relevant, existing regulatory protections are referred to as 
the ``baseline'' for the analysis and are discussed in the Draft 
Information Report. In this case, notable baseline protections include 
the ESA listings of the threatened corals, and the existing critical 
habitat for elkhorn and staghorn corals (73 FR 72210; November 26, 
2008).
    The Draft Information Report describes the projected future Federal 
activities that would trigger section 7 consultation requirements if 
they are implemented in the future, because they may affect the 
essential feature and consequently may result in economic costs or 
negative impacts. The report also identifies the potential national 
security and other relevant impacts that may arise due to the proposed 
critical habitat designations, such as positive impacts that may arise 
from conservation of the species and its habitat, state and local 
protections that may be triggered as a result of designation, and 
education of the public to the importance of an area for species 
conservation.

Economic Impacts

    Economic impacts of the critical habitat designations result 
through implementation of section 7 of the ESA in consultations with 
Federal agencies to ensure their proposed actions are not likely to 
destroy or adversely modify critical habitat. The economic impacts of 
consultation may include both administrative and project modification 
costs; economic impacts that may be associated with the conservation 
benefits resulting from consultation are described later.
    In 2016, we examined the ESA section 7 consultation record for the 
period 2004-2014, as compiled in our Public Consultation Tracking 
System (PCTS) database, to identify the types of Federal activities 
that may affect the five threatened Caribbean corals' proposed critical 
habitat. We will also review more recent consultation information prior 
to the publication of any final rule. We requested that Federal action 
agencies provide us with information on any additional future 
consultations that may affect the proposed critical habitat, and 
therefore should be included in our analysis. Of the types of past 
consultations that may affect the essential feature in any unit of 
proposed critical habitat, we determined that none of the activities 
would solely affect the essential feature. That is, all categories of 
the activities identified have potential routes of effects to both the 
threatened corals and the critical habitat.
    We identified the following 10 categories of activities implemented 
by six different Federal entities as having the potential to affect the 
essential feature of the five corals' critical habitat:
     Coastal and in-water construction (e.g. docks, seawalls, 
piers, marinas, port expansions, anchorages, pipelines/cables, bridge 
repairs, aids to navigation, etc.) conducted or authorized by U.S. Army 
Corps of Engineers (USACE);
     Channel dredging (maintenance dredging of existing 
channels and offshore disposal of dredged material) conducted or 
authorized by USACE;
     Beach nourishment/shoreline protection (placement of sand 
onto eroding beaches from onshore or offshore borrow sites) conducted 
or authorized by USACE;
     Water quality management (revision of state water quality 
standards, issuance of National Pollutant Discharge Elimination System 
(NPDES) permits and Total Maximum daily load (TMDL) standards under the 
CWA, and pesticide registrations under the Federal Insecticide, 
Fungicide and Rodenticide Act) authorized by the Environmental 
Protection Agency (EPA);
     Protected area management (development of management plans 
for national parks, marine sanctuaries, wildlife refuges, etc.) 
conducted by the National Park Service (NPS) and NOAA National Ocean 
Service (NOS);
     Fishery management (development of fishery management 
plans under the Magnuson-Stevens Fishery Conservation and Management 
Act) conducted by NMFS;
     Aquaculture (development of aquaculture facilities) 
authorized by EPA and USACE, and funded by NMFS; and
     Military activities (e.g., training exercises) conducted 
by DoD.
    By conducting interviews and querying the database for these 
categories of activities in the maximum geographic extent of the sum of 
the five corals' proposed critical habitat, we estimate that 5 
programmatic, 39 formal, and 272 informal section 7 consultations (for 
a total of 307) are likely to occur over the next 10 years and will 
require analysis of impacts to the proposed critical habitat. Because 
we have data on past consultations for impacts to the acroporid corals 
as well as their critical habitat, we believe it is a reasonable 
assumption that the breakout of the type of past consultations (into 
informal, formal, and programmatic consultations) likely reflects the 
breakout of future consultations. In addition to the type of 
consultation, we also present the data across the geopolitical groups 
of units (i.e., the scale at which economic data is collected) that 
overlap with the maximum geographic extent (i.e., the area that is 
determined by the species with the widest geographic and depth ranges) 
of the proposed critical habitat designations. We are not able to 
display the data by individual species' specific areas due to the 
largely overlapping but

[[Page 76317]]

distinct nature of the specific areas for all the species within a 
geopolitical area, and the limitations on the way the historical 
consultation data are recorded (i.e., by county or region, rather than 
specific location).
    As discussed in more detail in our Draft Information Report, all 
categories of activities identified as having the potential to affect 
the proposed essential feature also have the potential to affect the 
threatened Caribbean corals. To estimate the economic impacts of 
critical habitat designation, our analysis compares the state of the 
world with and without the designation of critical habitat for the five 
corals. The ``without critical habitat'' scenario represents the 
baseline for the analysis, considering protections already afforded the 
proposed critical habitat as a result of the listing of the five corals 
as threatened species and as a result of other Federal, state, and 
local regulations or protections, notably the previous designation of 
critical habitat for the two Caribbean acroporids. The ``with critical 
habitat'' scenario describes the state of the world with the critical 
habitat designations. The incremental impacts that will be associated 
specifically with these critical habitat designations if finalized as 
proposed are the difference between the two scenarios. Baseline 
protections exist in large areas proposed for designation; however, 
there is uncertainty as to the degree of protection that these 
protections provide. In particular:
     The five corals are present in each of the areas proposed 
for them, and are already expected to receive significant protections 
related to the listing of the species under the ESA that may also 
protect the critical habitat. However, there is uncertainty on whether 
a particular species may be present within a particular project site, 
due to their patchy distribution throughout their habitat.
     The 2008 Acropora critical habitat designation overlaps 
significantly with the specific areas under consideration, and the 
overlap includes the areas where the vast majority of projects and 
activities potentially affected are projected to occur. The existing 
critical habitat designation shares the substrate aspect of the 
essential feature with this proposed designation for the five corals, 
but not the water quality components. The activities that may affect 
the proposed critical habitat water column feature are the same as 
those that would affect the Acropora critical habitat substrate 
feature, with the exception of activities that would increase water 
temperature.
    Incremental impacts result from changes in the management of 
projects and activities, above and beyond those changes resulting from 
existing required or voluntary conservation efforts undertaken due to 
other Federal, state, and local regulations or guidelines (baseline 
requirements). The added administrative costs of considering critical 
habitat in section 7 consultation and the additional impacts of 
implementing conservation efforts (i.e., reasonable and prudent 
alternatives in the case of an adverse modification finding) resulting 
from the designation of critical habitat are the direct, incremental 
compliance costs of designating critical habitat.
    Designation of critical habitat for the five corals is unlikely to 
result in any new section 7 consultations. Given the listing of the 
five corals, and the fact that the proposed critical habitat overlaps, 
in part, with Acropora critical habitat, section 7 consultations are 
already likely to occur for activities with a Federal nexus throughout 
the proposed critical habitat areas. However, the need to address 
adverse modification of the proposed critical habitat in future 
consultations will add an incremental administrative burden, but only 
for those activities that would not have affected Acropora critical 
habitat (i.e., the Federal action areas are outside the boundaries or 
the actions involve increases in water temperature that is not 
considered under existing Acropora critical habitat). Thus, some of the 
categories of activities identified above as having the potential to 
affect the proposed critical habitat will not result in incremental 
impacts due to these designations. We estimate that 1 programmatic, 19 
formal and 34 informal, for a total of 54 consultations will result in 
incremental costs over the next 10 years. Table 2 shows the predicted 
number of consultations, by activity and Federal agency, that are 
projected to result in incremental costs.

         Table 2--Forecast Incremental Section 7 Consultations by Activity and Action Agency (2016-2025)
----------------------------------------------------------------------------------------------------------------
                                     Coastal &
                                     in-water      Channel       Beach        Water       Military
               Unit                construction    dredging   nourishment    quality       (NAVY)       Total
                                      (USACE)      (USACE)      (USACE)    mgmt. (EPA)
----------------------------------------------------------------------------------------------------------------
Florida..........................            24            5            4            2            2           37
Puerto Rico......................             4            0            0            7            0           11
STT/STJ..........................             1            0            0            2            0            3
St. Croix........................             0            0            0            2            0            2
Navassa..........................             0            0            0            0            0            0
FGB..............................             0            0            0            0            0            0
                                  ------------------------------------------------------------------------------
    Total........................            29            5            4           19            2           54
                                  ------------------------------------------------------------------------------
        % of Total...............           43%           9%           7%          35%           4%         100%
----------------------------------------------------------------------------------------------------------------

    The administrative effort required to address adverse effects to 
the proposed critical habitat is assumed to be the same, on average, 
across activities regardless of the type of activity (e.g., beach 
nourishment versus channel dredging). Informal consultations are 
expected to require comparatively low levels of administrative effort, 
while formal and programmatic consultations are expected to require 
comparatively higher levels of administrative effort. For all formal 
and informal consultations, we anticipate that incremental 
administrative costs will be incurred by NMFS, a Federal action agency, 
and potentially a third party (e.g., applicant, permittee). For 
programmatic consultations, we anticipate that costs will be incurred 
by NMFS and a Federal action agency. Incremental administrative costs 
per consultation effort are expected on average to be $9,200 for 
programmatic consultations, $5,100 for formal consultations, and $2,400 
for informal consultations. The cost per consultation effort is 
multiplied by the number of each anticipated type of consultation 
(i.e., programmatic, formal, and

[[Page 76318]]

informal) within each unit under consideration. Incremental 
administrative costs are expected to total approximately $140,000 over 
the next 10 years for an annualized cost of $20,000 (discounted at 7 
percent as required by the Office of Management and Budget (OMB)).
    To determine the incremental impact of the designations of critical 
habitat from project modifications triggered specifically to avoid 
potential destruction or adverse modification of critical habitat, we 
evaluated whether and where critical habitat designations may generate 
project modifications above and beyond those undertaken under the 
baseline, for example, to avoid jeopardy to the five corals or to avoid 
destruction or adverse modification of existing Acropora critical 
habitat. Depending on the circumstances, project modifications may be 
considered baseline (e.g., would be required regardless of critical 
habitat designation) or incremental (e.g., resulting from critical 
habitat designation). The types of project modifications that may be 
recommended to avoid adverse modification of the five corals critical 
habitat are the same as those that would be recommended to avoid 
adverse modification of the existing Acropora critical habitat (with 
the exception of modifications to address increases in water 
temperature), or to avoid jeopardy to the five corals. Whether projects 
will require modifications solely due to the proposed critical habitat 
will depend on: (1) Geographic location, (2) activity type, and (3) 
results of surveys to determine the potential presence of at least one 
of the five corals. Project modifications would be incremental only in 
cases where the five listed corals are all absent and thus would not be 
affected, and the project would also not affect existing Acropora 
critical habitat.
    We conducted the following steps to quantify the incremental 
impacts of potential project modifications to the activities that we 
ultimately concluded would not affect one of the five corals and 
Acropora critical habitat: (1) Identified the types and occurrence of 
activities that are likely to be affected by the proposed critical 
habitat designations, (2) projected the likelihood that forecasted 
activities will in fact need to be modified, and (3) estimated the 
average costs of modifications needed to comply with the ESA's critical 
habitat provisions. Based on this analysis, incremental project 
modifications and associated costs are projected to result only from 
coastal and in-water construction, channel dredging, beach nourishment/
shoreline protection, water quality management activities, and military 
activities.
    We recognize that uncertainty exists regarding whether, where, and 
how frequently surveys will identify the presence of the five coral 
species. Should one of the listed corals be present within the area of 
a future project that may also affect proposed critical habitat, the 
costs of project modifications would not be incremental to the critical 
habitat. To reflect the uncertainty with respect to the likelihood that 
these consultations will require additional project modifications due 
to impacts to new critical habitat, we estimated a range of costs. The 
low-end estimate assumes that no incremental project modifications will 
occur because any project modifications would be required to address 
impacts to one of the five corals or to existing Acropora critical 
habitat in a project area. The high-end estimate assumes that all the 
project modifications would be incremental because none of the five 
corals are present and the action would not affect existing Acropora 
critical habitat. Taking into consideration the types and cost 
estimates of the project modifications that may be required for 
predicted consultations identified, we estimate the high-end 
incremental costs, which total $880,000 over 10 years for an annualized 
cost of $88,000 (discounted at 7 percent).
    Total incremental costs resulting from the five corals critical 
habitat are estimated to range from $140,000 to $1.02 million over 10 
years, an annualized cost of $20,000 to $140,000 (discounted at 7 
percent). The low-end costs are a result of the increased 
administrative effort to analyze impacts to the proposed critical 
habitat in future consultations on activities that are not projected to 
affect Acropora critical habitat (i.e., in areas outside the 
boundaries, projects with impacts to water temperature, or pesticide 
registrations). The high-end costs are a result of the increased 
administrative effort (i.e., low-end costs) plus the incremental 
project modification costs that stem solely from the proposed critical 
habitat. Incremental project modification costs are a result of future 
consultations that are not projected to have effects on Acropora 
critical habitat. The high-end costs also assume that the project 
modifications will be solely a result of the proposed critical habitat, 
and not the presence of the species. However, the high-end estimate is 
very likely an overestimate on incremental costs because an 
undetermined number of future consultations will have project 
modifications that address adverse effects to one or more of the five 
corals, as well as adverse effects to the new critical habitat. Nearly 
86 percent of total high-end incremental costs result from project 
modifications, primarily for coastal and in-water construction and 
water quality management consultations. The relative percentage costs 
by unit and depth is illustrated in Table 3 and Table 4 for the low-end 
and high-end scenarios, respectively (depth is included to illustrate 
areas being proposed beyond existing Acropora critical habitat, which 
extends to 30 m). At the high end, approximately 30 percent of these 
costs is related to activity in Florida and another 50 percent is 
related to activity occurring in Puerto Rico. This cost distribution is 
as expected due to the size of the human populations adjacent to the 
proposed units, and thus human activity, in these jurisdictions, as 
compared to the other units. In other words, the highest proportion of 
the incremental costs occurs in those units with the highest number of 
future consultations, which is proportional to the human population 
adjacent to those units.

                      Table 3--Low-End Total Incremental Costs (Administrative) by Unit, 2016-2025 ($2015, 7 percent discount rate)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                          Present value impacts                                                         Annualized impacts
--------------------------------------------------------------------------------------------------------------------------------------------------------
                  Unit                     Shore to 30 m   30 m to 90 m     All depths      % of Total     Shore to 30 m   30 m to 90 m     All depths
--------------------------------------------------------------------------------------------------------------------------------------------------------
Florida.................................         $15,000         $25,000         $40,000              30          $2,000          $3,600          $5,700
Puerto Rico.............................          22,000          49,000          70,000              50           3,100           7,000          10,000
STT/STJ.................................           4,000          10,000          14,000              10             600           1,400            2000
St. Croix...............................           4,000          10,000          14,000               0             600           1,400            2000
Navassa.................................               0               0               0               0               0               0               0

[[Page 76319]]

 
FGB.....................................               0               0               0               0               0               0               0
                                         ---------------------------------------------------------------------------------------------------------------
    Total...............................          45,000          95,000         140,000             100           6,300          13,500          20,000
--------------------------------------------------------------------------------------------------------------------------------------------------------
Note: The estimates may not sum to the totals reported due to rounding.


         Table 4--High-End Total Incremental Costs (Administrative and Project Modification) by Unit, 2016-2025 ($2015, 7 percent discount rate)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                          Present value impacts                                                         Annualized Impacts
--------------------------------------------------------------------------------------------------------------------------------------------------------
                  Unit                     Shore to 30 m   30 m to 90 m     All depths      % of Total     Shore to 30 m   30 m to 90 m     All depths
--------------------------------------------------------------------------------------------------------------------------------------------------------
Florida.................................        $385,000        $154,000        $540,000              53         $55,000         $22,300         $77,700
Puerto Rico.............................          22,000         408,000         429,000              42           3,100          57,700          60,700
STT/STJ.................................           4,000          29,000          33,000               3             600           3,600           4,700
St. Croix...............................           4,000          10,000          14,000               1             600           1,400           2,000
Navassa.................................               0               0               0               0               0               0               0
FGB.....................................               0               0               0               0               0               0               0
    Total...............................         415,000         604,000       1,020,000             100          59,000          83,000         140,000
--------------------------------------------------------------------------------------------------------------------------------------------------------
Note: The estimates may not sum to the totals reported due to rounding.

    Tables 5 and 6 present total low and high-end incremental costs by 
activity type. The activity with the highest costs is coastal and in-
water construction, ranging from $70,600 to $500,000 over 10 years 
(discounted at 7 percent). At the high end this represents 
approximately 50 percent of the total costs. This result is expected 
because this is the category of activity with the most frequent 
projects that occur in the marine environment.

                                                        Table 5--Low-End Total Incremental Costs (Administrative) by Activity, 2016-2025
                                                                                [$2015, 7 percent discount rate]
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                    Coastal and                            Water                           Coastal and                              Water
                       Unit                          in-water       Beach      Channel    quality   Military     Total      in-water       Beach       Channel     quality   Military     Total
                                                   construction  nourishment   dredging    mgmt.   activities             construction  nourishment    dredging     mgmt.   activities
                                                        (USACE)      (USACE)    (USACE)     (EPA)     (Navy)   .........       (USACE)      (USACE)      (USACE)     (EPA)     (Navy)
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Florida..........................................       $14,500       $5,600       $220    $9,200    $11,000     $32,500        $2,100         $800          $31      $670     $1,500     $4,600
Puerto Rico......................................        45,400        4,100      5,000    10,500      3,000      63,000         6,500          580          710     1,000        600      8,900
STT/STJ..........................................         5,800           80        230     7,880          0       6,200           830           10           30       600          0        880
St. Croix........................................         4,900            0        950     8,000          0       6,000           700            0          140       600          0        830
Navassa..........................................             0            0          0         0          0           0             0            0            0         0          0          0
FGB..............................................             0            0          0         0          0           0             0            0            0         0          0          0
                                                  ----------------------------------------------------------------------------------------------------------------------------------------------
    Total........................................        70,600        9,700      6,300    36,000     14,000     140,000        10,000        1,400          910     3,000      2,100     18,000
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------


                                           Table 6--High-End Total Incremental Costs (Administrative and Project Modification) by Activity, 2016-2025
                                                                                [$2015, 7 percent discount rate]
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                          Coastal &                             Water                         Coastal &                               Water
                          Unit                             in-water      Beach      Channel    quality  Military    Total      in-water      Beach       Channel     quality  Military    Total
                                                            const.    nourishment   dredging    mgmt.                           const.    nourishment    dredging     mgmt.
                                                             (USACE)      (USACE)    (USACE)     (EPA)    (NAVY)  .........      (USACE)      (USACE)      (USACE)     (EPA)    (NAVY)
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
FL.....................................................     $364,500      $80,600    $75,220    $9,200   $11,000   $532,500      $53,000      $11,800      $11,031      $170    $1,500   $76,600
PR.....................................................      101,400        4,100      5,000   310,500     3,000    422,000       14,500          580          710    43,000       600    59,390
STT/STJ................................................       24,800           80        230        80         0     25,200        3,530           11           33        11         0     3,585
STX....................................................        4,900            0        950     8,000         0      6,000          700            0          140         0         0       840
Nav....................................................            0            0          0         0         0          0            0            0            0         0         0         0
FGB....................................................            0            0          0         0         0          0            0            0            0         0         0         0
                                                        ----------------------------------------------------------------------------------------------------------------------------------------
    Total..............................................      500,600       84,700     81,300   336,000    14,000  1,020,000       71,000       12,000       12,000    43,000     2,100   140,000
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------


[[Page 76320]]

National Security Impacts

    Our critical habitat impacts analyses recognize that impacts to 
national security result only if a designation would trigger future ESA 
section 7 consultations because a proposed military activity ``may 
affect'' the physical or biological feature(s) essential to the listed 
species' conservation. Anticipated interference with mission-essential 
training or testing or unit readiness, through the additional 
commitment of resources to an adverse modification analysis and 
expected requirements to modify the action to prevent adverse 
modification of critical habitat, has been identified as an impact of 
critical habitat designations. Our impacts analyses also recognize that 
whether national security impacts result from the designation depends 
on whether future consultations would be required under the jeopardy 
standard, due to the coral being present, regardless of the critical 
habitat designation, and whether the designation would add new burdens 
beyond those related to the consultation on effects to the corals.
    As described previously, we identified DoD military operations as a 
category of activity that has the potential to affect the essential 
feature of the proposed critical habitat for the five corals. However, 
most of the actions we have consulted on in the past would not result 
in incremental impacts in the future, because the consultations would 
be required to address impacts to either the five corals or the 
substrate feature of Acropora critical habitat. Based on our review of 
historical consultations, only those activities that would be conducted 
in the South Florida Ocean Measuring Facility operated by the Navy 
would involve incremental impacts due to the proposed designations, and 
thus only consultations on naval activities in this particular area 
could result in national security impacts.
    In 2015, we requested the DoD provide us with information on 
military activities that may affect the proposed critical habitat and 
whether the proposed critical habitat would have a national security 
impact due to the requirement to consult on those activities. The Navy 
responded that activities associated with the designated restricted 
area managed by the South Florida Ocean Measuring Facility (SFOMF-RA), 
defined in 33 CFR 334.580, and located offshore of Dania, Florida, may 
affect the proposed critical habitat. This assertion is supported by 
two previous consultations on cable-laying activities in the SFOMF-RA 
over the past 10 years.
    The SFOMF-RA contains underwater cables and benthic sensor systems 
that enable real-time data acquisition from Navy sensor systems used in 
Navy exercises. The previous consultations, in 2011 and 2013, were for 
the installation of new cables. These consultations did not affect any 
coral species, because the cables were routed to avoid the corals. 
These consultations did not consider effects to Acropora critical 
habitat because the area was excluded from the 2008 Acropora critical 
habitat designation based on national security impacts. However, 
installation of the cables would have affected the substrate feature. 
Because the installation of new cables in the future may affect the 
proposed critical habitat substrate feature, and the area was excluded 
from Acropora critical habitat, we expect that there may be an 
incremental impact to the Navy due to the proposed critical habitat 
designations. The impact would result from the added administrative 
effort to consider impacts to the proposed critical habitat and project 
modifications to avoid adverse effects to the substrate aspect of the 
essential feature. These impacts would likely be incremental due to the 
critical habitat designations.
    The Navy has conducted extensive benthic surveys in the SFOMF-RA 
and has mapped the locations of all listed corals. Thus, they would be 
able to avoid impacts to the listed corals from the installation of new 
cables. However, if the cables were laid over the proposed critical 
habitat's substrate feature, the cable would make the substrate 
unavailable for settlement and recruitment. Thus, we would require 
consultation to evaluate impact of this adverse effect to the essential 
feature. The administrative costs and project modification costs would 
be incremental impacts of the proposed critical habitat. The Navy 
concluded that critical habitat designations at the SFOMF-RA would 
likely impact national security by diminishing military readiness 
through the requirement to consult on their activities within critical 
habitat beyond the requirement to consult on the threatened corals and 
through any additional project modifications.
    In 2019, the Navy requested the exclusion of the Federal Danger 
Zones and Restricted Areas off NAS Key West designated in 33 CFR 
334.610 and 33 CFR 334.620 in Navy's Key West Operations Area. However, 
at this time NMFS is unable to make a determination and has been in 
discussion with the Navy to identify the potential national security 
impacts in these areas. NMFS will provide exclusion determinations for 
this request in the final rule.

Other Relevant Impacts

    We identified three broad categories of other relevant impacts of 
this proposed critical habitat: Conservation benefits, both to the 
species and to society; impacts on governmental or private entities 
that are implementing existing management plans that provide benefits 
to the listed species; and educational and awareness benefits. Our 
Draft Impacts Analysis discusses conservation benefits of designating 
the 28 specific areas, and the benefits of conserving the five corals 
to society, in both ecological and economic metrics.

Conservation Benefits

    The primary benefit of critical habitat designation is the 
contribution to the conservation and recovery of the five corals. That 
is, in protecting the features essential to the conservation of the 
species, critical habitat directly contributes to the conservation and 
recovery of the species. This analysis contemplates three broad 
categories of benefits of critical habitat designation:
    (1) Increased probability of conservation and recovery of the five 
corals. The most direct benefits of the critical habitat designations 
stem from the enhanced probability of conservation and recovery of the 
five corals. From an economic perspective, the appropriate measure of 
the value of this benefit is people's ``willingness-to-pay'' for the 
incremental change. While the existing economics literature is 
insufficient to provide a quantitative estimate of the extent to which 
people value incremental changes in recovery potential, the literature 
does provide evidence that people have a positive preference for listed 
species conservation, even beyond any direct (e.g., recreation, such as 
viewing the species while snorkeling or diving) or indirect (e.g., reef 
fishing that is supported by the presence of healthy reef ecosystems) 
use for the species.
    (2) Ecosystem service benefits. Overall, coral reef ecosystems, 
including those comprising populations of the five corals, provide 
important ecosystem services of value to individuals, communities, and 
economies. These include recreational opportunities (and associated 
tourism spending in the regional economy), habitat and nursery 
functions for recreationally and commercially valuable fish species, 
shoreline protection in the form of wave attenuation and reduced beach 
erosion, and climate stabilization via carbon sequestration. The total 
annual

[[Page 76321]]

economic value of coral reefs in U.S. jurisdictions in 2012 has been 
summarized as: (1) Florida--$324M/year, (2) Puerto Rico--$1,161M/year, 
and (3) USVI--$210M/year (Brander and Van Beukering, 2013). Efforts to 
conserve the five corals also benefit the broader reef ecosystems, 
thereby preserving or improving these ecosystem services and values.
    Conservation benefits to each coral in all their specific areas are 
expected to result from the designations. Critical habitat most 
directly influences the recovery potential of the species and protects 
coral reef ecosystem services through its implementation under section 
7 of the ESA. That is, these benefits stem from the implementation of 
project modifications undertaken to avoid destruction and adverse 
modification of critical habitat. Accordingly, critical habitat 
designation is most likely to generate the benefits discussed in those 
areas expected to be subject to additional recommendations for project 
modifications (above and beyond any conservation measures that may be 
implemented in the baseline due to the listing status of the species or 
for other reasons). In addition, critical habitat designation may 
generate ancillary environmental improvements and associated ecosystem 
service benefits (i.e., to commercial fishing and recreational 
activities) in areas subject to incremental project modifications. 
While neither benefit can be directly monetized, existing information 
on the value of coral reefs provides an indication of the value placed 
on those ecosystems.
    (3) Education and Awareness Benefits. There is the potential for 
education and awareness benefits arising from the critical habitat 
designations. This potential stems from two sources: (1) Entities that 
engage in section 7 consultation and (2) members of the general public 
interested in coral conservation. The former potential exists from 
parties who alter their activities to benefit the species or essential 
feature because they were made aware of the critical habitat 
designations through the section 7 consultation process. The latter may 
engage in similar efforts because they learned of the critical habitat 
designations through outreach materials. For example, we have been 
contacted by diver groups in the Florida Keys who are specifically 
seeking the two Caribbean acroporid corals on dives and reporting those 
locations to NMFS, thus assisting us in planning and implementing coral 
conservation and management activities. In our experience, designation 
raises the public's awareness that there are special considerations to 
be taken within the area.
    Similarly, state and local governments may be prompted to enact 
laws or rules to complement the critical habitat designations and 
benefit the listed corals. Those laws would likely result in additional 
impacts of the designations. However, it is impossible to quantify the 
beneficial effects of the awareness gained through, or the secondary 
impacts from state and local regulations resulting from, the critical 
habitat designations.

Impacts to Governmental and Private Entities With Existing Management 
Plans Benefitting the Essential Features

    Among other relevant impacts of the critical habitat designations 
we considered under section 4(b)(2) of the ESA are impacts on 
relationships with, or the efforts of, private and public entities 
involved in management or conservation efforts benefiting listed 
species. In some cases, the additional regulatory layer of a 
designation could negatively impact the conservation benefits provided 
to the listed species by existing or proposed management or 
conservation plans.
    Impacts on entities responsible for natural resource management, 
conservation plans, or the functioning of those plans depend on the 
type and number of section 7 consultations that may result from the 
designations in the areas covered by those plans, as well as any 
potential project modifications recommended by these consultations. As 
described in section 10.1.3.5 of the Draft Information Report, there 
were six past consultations on Federal protected area management plans 
(three formal, three informal) in the units being proposed as critical 
habitat. The three formal consultations were related to the NPS 
management plans at the following Federal protected areas:
     Buck Island Reef National Monument in St. Croix, U.S. VI;
     Everglades National Park in Monroe County, FL; and
     Biscayne National Park in Miami-Dade County, FL.
    Negative impacts to the NPS could result if the critical habitat 
designations interfere with these agencies' ability to provide for the 
conservation of the species, or otherwise hampers management of these 
areas. Existing management plans in these three protected areas and 
their associated regulations protect existing coral reef resources, but 
they do not specifically protect the substrate and water quality 
feature for purposes of increasing listed coral abundance and eventual 
recovery. Thus, the five corals' critical habitat designations would 
provide unique benefits for the corals, beyond the benefits provided by 
these existing management plans. However, the identified areas not only 
contain the essential feature, but they also contain one or more of the 
five corals, and they overlap with previously designated Acropora 
critical habitat. Hence, any section 7 impacts will likely be limited 
to administrative costs. Because we identified resource management as a 
category of activities that may affect both the five corals and the 
critical habitat, these impacts would not be incremental. In addition, 
we found no evidence that relationships with the Federal protected area 
managers would be negatively affected, or that negative impacts to 
other agencies' ability to provide for the conservation of the listed 
coral species would result from designation. Therefore, we do not 
expect the critical habitat designations to impact natural resource 
agencies implementing management plans.

Discretionary Exclusions Under Section 4(b)(2)

    We are not exercising our discretion to consider exclusions based 
on economic impacts. Our conservative identification of the highest 
potential incremental economic impacts indicates that any such impacts 
will be relatively small--$20,000 to $140,000 annually. The incremental 
costs are split between the incremental administrative effort and 
incremental project modification costs for the relatively few (about 
54) consultations over the next 10 years. Further, the analysis 
indicates that there is no particular area within the units that meet 
the definition of critical habitat where economic impacts would be 
particularly high or concentrated as compared to the human population 
and level of activities in each unit.
    We are proposing to exclude one particular area on the basis of 
national security impacts. National security impacts would occur in the 
designated restricted area managed by the SFOMF-RA offshore Dania 
Beach, Florida, which coincides with all five threatened corals' 
proposed critical habitats. The area does support the essential feature 
and contains the five threatened Caribbean corals. The Navy concluded 
that critical habitat designations at the SFOMF-RA would likely impact 
national security by diminishing military readiness through the 
requirement to consult on their activities within critical habitat 
beyond the requirement to consult on the threatened corals and 
potentially result in additional project modifications. This

[[Page 76322]]

is likely because the Navy, which has comprehensive maps of all 
threatened coral locations within the SFOMF-RA, would need to avoid 
impacts to the substrate aspect of the essential feature in addition to 
avoiding impacts to the listed corals themselves, should any new cables 
or sensors be installed. The Navy stated that impediments to SFOMF 
operations would adversely impact the Navy's ability to maintain an 
underwater stealth advantage of future classes of ships and submarines 
and impede our nation's ability to address emergent foreign threats. 
The Navy stated that the critical habitat designations would hinder its 
ability to continue carrying out the unique submarine training provided 
by this facility, as no other U.S. facility has the capability to make 
the cable-to-shore measurements enabled at the SFOMF that satisfy its 
requirement to assure the newest submarines are not vulnerable to 
electromagnetic detection. The Navy advised the loss of this capability 
would directly impact new construction of submarines and submarines 
already in the fleet that are being readied for deployment. Therefore, 
SFOMF's activities are necessary to maintain proficiency in mission-
essential tactics for winning wars, deterring aggression, and 
maintaining freedom of the seas. The excluded area comprises a very 
small portion of the areas that meet the definition of critical 
habitat. Navy regulations prohibit anchoring, trawling, dredging, or 
attaching any object within the area; thus, the corals and their 
habitat will be protected from these threats. Further, the corals and 
their habitat will still be protected through ESA section 7 
consultations that prohibit jeopardizing the species' continued 
existence and require modifications to minimize the impacts of 
incidental take. Further, we do not foresee other Federal activities 
that might adversely impact critical habitat that would be exempted 
from future consultation requirements due to this exclusion, since this 
area is under exclusive military control. Therefore, in our judgment, 
the benefit of including the particular area of the SFOMF-RA is 
outweighed by the benefit of avoiding the impacts to national security 
the Navy would experience if it were required to consult based on 
critical habitat. Given the small area (5.5 mi\2\ (14.2 km\2\)) that 
meets the definition of critical habitat encompassed by this area, we 
conclude that exclusion of this area will not result in extinction of 
any of the five threatened Caribbean corals.
    We are not able to make a determination on the exclusion of the Key 
West Operations Area at this time due to a lack of information to 
conduct the proper analysis and our deadline for the proposed 
designations. NMFS, in close coordination with the Navy, will 
reconsider this matter consistent with the weighing factors, and will 
provide exclusion determinations for this request in the final rule.
    We are not proposing to exclude any particular area based on other 
relevant impacts. Other relevant impacts include conservation benefits 
of the designations, both to the species and to society. Because the 
feature that forms the basis of the critical habitat designations is 
essential to the conservation of the five threatened Caribbean corals, 
the protection of critical habitat from destruction or adverse 
modification may at minimum prevent loss of the benefits currently 
provided by the species and their habitat and may contribute to an 
increase in the benefits of these species to society in the future. 
While we cannot quantify or monetize the benefits, we believe they are 
not negligible and would be an incremental benefit of these 
designations.

Proposed Critical Habitat Designations

    Our critical habitat regulations state that we will show critical 
habitat on a map instead of using lengthy textual descriptions to 
describe critical habitat boundaries, with additional information 
discussed in the preamble of the rulemaking and in agency records (50 
CFR 424.12(c)). When several habitats, each satisfying the requirements 
for designation as critical habitat, are located in proximity to one 
another, an inclusive area may be designated as critical habitat (50 
CFR 424.12(d)).
    The habitat containing the essential feature and that may require 
special management considerations or protection is marine habitat of 
particular depths for each species in the Atlantic Ocean, Gulf of 
Mexico, and Caribbean Sea. The boundaries of each specific area for 
each coral species are determined by the species' commonly occupied 
minimum and maximum depth ranges (i.e., depth contour) within their 
specific geographic distributions, as described in the literature and 
observed in monitoring data. All depths are relative to mean low water 
(MLW). Because the quality of the available GIS data varies based on 
collection method, resolution, and processing, the proposed critical 
habitat boundaries are defined by the maps in combination with the 
textual information included in the proposed regulation. This textual 
information clarifies and refines the location and boundaries of each 
area. In particular, the textual information clarifies the proposed 
boundaries of the critical habitat for each coral species based on a 
specific water-depth range. The textual information also lists certain 
particular areas that are not included in the proposed critical 
habitat.

Occupied Critical Habitat Unit Descriptions

    Table 7 describes each unit of critical habitat for each species. 
It contains the geographic extent and water depths, which generally 
form the boundaries of each unit.

                                        Table 7--Description and Extent of Each Critical Habitat Unit by Species
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                    Critical habitat unit                                                                               Area (approx.
              Species                        name                 Location             Geographic extent        Water depth range         rounded)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Orbicella annularis...............  OANN-1...............  Florida..............  Lake Worth Inlet, Palm      2-20 m (6.5-65.6 ft)  3,800 km\2\ (1,300
                                                                                   Beach County to                                   mi\2\).
                                                                                   Government Cut, Miami-
                                                                                   Dade County.
                                                           Florida..............  Government Cut, Miami-Dade  0.5-20 m (1.6-65.6
                                                                                   County to Dry Tortugas.     ft).
                                    OANN-2...............  Puerto Rico..........  All islands...............  0.5-20 m (1.6-65.6    2,100 km\2\ (830
                                                                                                               ft).                  mi\2\).
                                    OANN-3...............  USVI.................  All islands of St. Thomas   0.5-20 m (1.6-65.6    100 km\2\ (40
                                                                                   and St. John.               ft).                  mi\2\).
                                    OANN-4...............  USVI.................  All islands of St. Croix..  0.5-20 m (1.6-65.6    230 km\2\ (89
                                                                                                               ft).                  mi\2\).
                                    OANN-5...............  Navassa..............  Navassa Island............  0.5-20 m (1.6-65.6    0.13 km\2\ (0.05
                                                                                                               ft).                  mi\2\).

[[Page 76323]]

 
                                    OANN-6...............  FGB..................  East Flower Garden Bank     17-90 m (55-295 ft).  41 km\2\ (16 mi\2\).
                                                                                   and West Flower Garden
                                                                                   Bank.
Orbicella faveolata...............  OFAV-1...............  Florida..............  St. Lucie Inlet, Martin     2-90 m (6.5-295 ft).  7,900 km\2\ (3,100
                                                                                   County to Government Cut,                         mi\2\).
                                                                                   Miami-Dade County.
                                                           Florida..............  Government Cut, Miami-Dade  0.5-90 m (1.6-295
                                                                                   County to Dry Tortugas.     ft).
                                    OFAV-2...............  Puerto Rico..........  All islands of Puerto Rico  0.5-90 m (1.6-295     5,500 km\2\ (2,100
                                                                                                               ft).                  mi\2\).
                                    OANN-3...............  USVI.................  All islands of St. Thomas   0.5-90 m (1.6-295     1,400 km\2\ (520
                                                                                   and St. John.               ft).                  mi\2\).
                                    OFAV-4...............  USVI.................  All islands of St. Croix..  0.5-90 m (1.6-295     360 km\2\ (140
                                                                                                               ft).                  mi\2\).
                                    OFAV-5...............  Navassa..............  Navassa Island............  0.5-90 m (1.6-295     11 km\2\ (4 mi\2\).
                                                                                                               ft).
                                    OFAV-6...............  FGB..................  East Flower Garden Bank     17-90 m (55-295 ft).  41 km\2\ (16 mi\2\).
                                                                                   and West Flower Garden
                                                                                   Bank.
Orbicella franksi.................  OFRA-1...............  Florida..............  St. Lucie Inlet, Martin     2-90 m (6.5-295 ft).  7,900 km\2\ (3,100
                                                                                   County to Government Cut,                         mi\2\).
                                                                                   Miami-Dade County.
                                                           Florida..............  Government Cut, Miami-Dade  0.5-90 m (1.6-295
                                                                                   County to Dry Tortugas.     ft)..
                                    OFRA-2...............  Puerto Rico..........  All islands of Puerto Rico  0.5-90 m (1.6-295     5,500 km\2\ (2,100
                                                                                                               ft).                  mi\2\).
                                    OFRA-3...............  USVI.................  All islands of St. Thomas   0.5-90 m (1.6-295     1,400 km\2\ (520
                                                                                   and St. John.               ft).                  mi\2\).
                                    OFRA-4...............  USVI.................  All islands of St. Croix..  0.5-90 m (1.6-295     360 km\2\ (140
                                                                                                               ft).                  mi\2\).
                                    OFRA-5...............  Navassa..............  Navassa Island............  0.5-90 m (1.6-295     11 km\2\ (4 mi\2\).
                                                                                                               ft).
                                    OFRA-6...............  FGB..................  East Flower Garden Bank     17-90 m (55-295 ft).  41 km\2\ (16 mi\2\).
                                                                                   and West Flower Garden
                                                                                   Bank.
Dendrogyra cylindrus..............  DCYL-1...............  Florida..............  Lake Worth Inlet, Palm      2-25 m (6.5-82 ft)..  4,300 km\2\ (1,700
                                                                                   Beach County to                                   mi\2\).
                                                                                   Government Cut, Miami-
                                                                                   Dade County.
                                                           Florida..............  Government Cut, Miami-Dade  1-25 m (3.3-82 ft)..
                                                                                   County to Dry Tortugas.
                                    DCYL-2...............  Puerto Rico..........  All islands...............  1-25 m (3.3-82 ft)..  2,800 km\2\ (1,100
                                                                                                                                     mi\2\).
                                    DCYL-3...............  USVI.................  All islands of St. Thomas   1-25 m (3.3-82 ft)).  170 km\2\ (65
                                                                                   and St. John.                                     mi\2\).
                                    DCYL-4...............  USVI.................  All islands of St. Croix..  1-25 m (3.3-82 ft)..  300 km\2\ (120
                                                                                                                                     mi\2\).
                                    DCYL-5...............  Navassa..............  Navassa Island............  1-25 m (3.3-82 ft)).  0.5 km\2\ (0.2
                                                                                                                                     mi\2\).
Mycetophyllia ferox...............  MFER-1...............  Florida..............  Broward County to Dry       5-90 m (16.4-295 ft)  6,400 km\2\ (2,500
                                                                                   Tortugas.                                         mi\2\).
                                    MFER-2...............  Puerto Rico..........  All islands of Puerto Rico  5-90 m (16.4-295 ft)  5,000 km\2\ (1,900
                                                                                                                                     mi\2\).
                                    MFER-3...............  USVI.................  All islands of St. Thomas   5-90 m (16.4-295 ft)  1,300 km\2\ (510
                                                                                   and St. John.                                     mi\2\).
                                    MFER-4...............  USVI.................  All islands of St. Croix..  5-90 m (16.4-295 ft)  310 km\2\ (120
                                                                                                                                     mi\2\).
                                    MFER-5...............  Navassa..............  Navassa Island............  5-90 m (16.4-295 ft)  11 km\2\ (4 mi\2\).
--------------------------------------------------------------------------------------------------------------------------------------------------------

Effects of Critical Habitat Designations

    Section 7(a)(2) of the ESA requires Federal agencies, including 
NMFS, to insure that any action authorized, funded, or carried out by 
the agency is not likely to jeopardize the continued existence of any 
threatened or endangered species or destroy or adversely modify 
designated critical habitat. Federal agencies are also required to 
confer with NMFS regarding any actions likely to jeopardize a species 
proposed for listing under the ESA, or likely to destroy or adversely 
modify proposed critical habitat, pursuant to section 7(a)(2).
    A conference involves informal discussions in which NMFS may 
recommend conservation measures to minimize or avoid adverse effects. 
The discussions and conservation recommendations are documented in a 
conference report provided to the Federal agency. If requested by the 
Federal agency, a formal conference report may be issued, including a 
biological opinion prepared according to 50 CFR 402.14. A formal 
conference report may be adopted as the biological opinion when the 
species is listed or critical habitat designated, if no significant new 
information or changes to the action alter the content of the opinion.
    When a species is listed or critical habitat is designated, Federal 
agencies must consult with NMFS on any agency actions that may affect a 
listed species or its critical habitat. During the consultation, we 
evaluate the agency action to determine whether the action may 
adversely affect listed species or

[[Page 76324]]

critical habitat and issue our findings in a letter of concurrence or 
in a biological opinion. If we conclude in the biological opinion that 
the agency action would likely result in the destruction or adverse 
modification of critical habitat, we would also identify any reasonable 
and prudent alternatives to the action. Reasonable and prudent 
alternatives are defined in 50 CFR 402.02 as alternative actions 
identified during formal consultation that can be implemented in a 
manner consistent with the intended purpose of the action, that are 
consistent with the scope of the Federal agency's legal authority and 
jurisdiction, that are economically and technologically feasible, and 
that would avoid the destruction or adverse modification of critical 
habitat.
    Regulations at 50 CFR 402.16 require Federal agencies that have 
retained discretionary involvement or control over an action, or where 
such discretionary involvement or control is authorized by law, to 
reinitiate consultation on previously reviewed actions in instances 
where: (1) Critical habitat is subsequently designated; or (2) new 
information or changes to the action may result in effects to critical 
habitat not previously considered in the biological opinion. 
Consequently, some Federal agencies may request reinitiation of 
consultation or conference with NMFS on actions for which formal 
consultation has been completed, if those actions may affect designated 
critical habitat or adversely modify or destroy proposed critical 
habitat.
    Activities subject to the ESA section 7 consultation process 
include activities on Federal lands and activities on private or state 
lands requiring a permit from a Federal agency or some other Federal 
action, including funding. ESA section 7 consultation would not be 
required for Federal actions that do not affect listed species or 
critical habitat and for actions that are not federally funded, 
authorized, or carried out.

Activities That May Be Affected

    Section 4(b)(8) of the ESA requires that we describe briefly, and 
evaluate in any proposed or final regulation to designate critical 
habitat, those activities that may adversely modify such habitat or 
that may be affected by such designation. As described in our Draft 
Information Report, a wide variety of Federal activities may require 
ESA section 7 consultation because they may affect the essential 
feature of critical habitat. Specific future activities will need to be 
evaluated with respect to their potential to destroy or adversely 
modify critical habitat, in addition to their potential to affect and 
jeopardize the continued existence of listed species. For example, 
activities may adversely modify the substrate portion of the essential 
feature by removing or altering the substrate or adversely modify the 
water column portion of the essential feature by reducing water clarity 
through turbidity. These activities would require ESA section 7 
consultation when they are authorized, funded, or carried out by a 
Federal agency. A private entity may also be affected by these proposed 
critical habitat designations if it is a proponent of a project that 
requires a Federal permit or receives Federal funding.
    Categories of activities that may be affected by the designations 
include coastal and in-water construction, channel dredging, beach 
nourishment and shoreline protection, water quality management, and 
military activities. Questions regarding whether specific activities 
may constitute destruction or adverse modification of critical habitat 
should be directed to us (see ADDRESSES and FOR FURTHER INFORMATION 
CONTACT). Identifying concentrations at which the conservation value of 
habitat for listed corals may be affected is inherently complex and 
influenced by taxa, exposure duration, and acclimatization to localized 
seawater regimes. Consequently, the actual responses of the critical 
habitat (and listed corals) to changes in the essential feature 
resulting from future Federal actions will be case and site-specific, 
and predicting such responses will require case and site-specific data 
and analyses.

Public Comments Solicited

    We request that interested persons submit comments, information, 
and suggestions concerning this proposed rule during the comment period 
(see DATES). We are soliciting comments or suggestions from the public, 
other concerned governments and agencies, the scientific community, 
industry, or any other interested party concerning the areas proposed 
for designation. We also request comment on areas we are proposing for 
exclusion, including but not limited to the types of areas that qualify 
as managed area (e.g., areas adjacent to dredged channels, nearshore 
placement areas). Additionally, we request comment on all aspects of 
this proposal, including whether specific language regarding such areas 
should be included in the text of the regulations and whether any 
discussion of or references to this topic in this preamble or the 
regulatory text should otherwise be further clarified or defined. We 
also solicit comments regarding specific, foreseeable benefits and 
impacts stemming from this designation. We also seek comments on the 
identified geographic area and depths occupied by the species. You may 
submit your comments and materials concerning this proposal by any one 
of several methods (see ADDRESSES). We will consider all comments 
pertaining to these designations received during the comment period in 
preparing the final rule. Accordingly, the final designations may 
differ from this proposal.

Information Quality Act and Peer Review

    The data and analyses supporting this proposed action have 
undergone a pre-dissemination review and have been determined to be in 
compliance with applicable information quality guidelines implementing 
the Information Quality Act (Section 515 of Pub. L. 106-554). On 
December 16, 2004, OMB issued its Final Information Quality Bulletin 
for Peer Review (Bulletin). The Bulletin was published in the Federal 
Register on January 14, 2005 (70 FR 2664), and went into effect on June 
16, 2005. The primary purpose of the Bulletin is to improve the quality 
and credibility of scientific information disseminated by the Federal 
government by requiring peer review of ``influential scientific 
information'' and ``highly influential scientific information'' prior 
to public dissemination. ``Influential scientific information'' is 
defined as information the agency reasonably can determine will have or 
does have a clear and substantial impact on important public policies 
or private sector decisions. The Bulletin provides agencies broad 
discretion in determining the appropriate process and level of peer 
review. Stricter standards were established for the peer review of 
highly influential scientific assessments, defined as information whose 
dissemination could have a potential impact of more than $500 million 
in any one year on either the public or private sector or that the 
dissemination is novel, controversial, or precedent-setting, or has 
significant interagency interest.
    The information in the Draft Information Report supporting this 
proposed critical habitat rule is considered influential scientific 
information and subject to peer review. To satisfy our requirements 
under the OMB Bulletin, we obtained independent peer review of the 
information used to draft this document, and incorporated the peer 
review comments into this draft prior to dissemination of this proposed 
rulemaking. Comments received from peer reviewers are available on our 
website at https://www.cio.noaa.gov/services_programs/prplans/ID346.html.

[[Page 76325]]

Classification

Takings (Executive Order 12630)

    Under E.O. 12630, Federal agencies must consider the effects of 
their actions on constitutionally protected private property rights and 
avoid unnecessary takings of private property. A taking of property 
includes actions that result in physical invasion or occupancy of 
private property, and regulations imposed on private property that 
substantially affect its value or use. In accordance with E.O. 12630, 
this proposed rule would not have significant takings implications. A 
takings implication assessment is not required. These designations 
would affect only Federal agency actions (i.e., those actions 
authorized, funded, or carried out by Federal agencies). Therefore, the 
critical habitat designations does not affect landowner actions that do 
not require Federal funding or permits.

Regulatory Planning and Review (Executive Order 12866), Reducing 
Regulation and Controlling Regulatory Costs (Executive Order 13771)

    This proposed rule has been determined to be significant for 
purposes of E.O. 12866 review. This proposed rulemaking is expected to 
be regulatory under E.O. 13771. A draft report evaluating the economic 
impacts of the proposed rule has been prepared and is included the 
Draft Information Report, incorporating the principles of E.O. 12866.
    Based on the economic impacts evaluation in the Draft Information 
Report, Total incremental costs resulting from the five corals critical 
habitat are estimated to range from $140,000 to $1.02 million over 10 
years, an annualized cost of $20,000 to $140,000 (discounted at 7 
percent). The low-end costs are a result of the increased 
administrative effort to analyze impacts to the proposed critical 
habitat in future consultations on activities that are not projected to 
affect Acropora critical habitat (i.e., in areas outside the 
boundaries, projects with impacts to water temperature, or pesticide 
registrations). The high-end costs are a result of the increased 
administrative effort (i.e., low-end costs) plus the incremental 
project modification costs that stem solely from the proposed critical 
habitat. Incremental project modification costs are a result of future 
consultations that are not projected to have effects on Acropora 
critical habitat. The high-end costs also assume that the project 
modifications will be solely a result of the proposed critical habitat, 
and not the presence of the species. However, the high-end estimate is 
very likely an overestimate on incremental costs because an 
undetermined number of future consultations will have project 
modifications that address adverse effects to one or more of the five 
corals, as well as adverse effects to the new critical habitat.

Federalism (Executive Order 13132)

    Pursuant to the Executive Order on Federalism, E.O. 13132, we 
determined that this proposed rule does not have significant federalism 
effects and that a federalism assessment is not required. However, in 
keeping with Department of Commerce policies and consistent with ESA 
regulations at 50 CFR 424.16(c)(1)(ii), we will request information for 
this proposed rule from state and territorial resource agencies in 
Florida, Puerto Rico, and USVI. The proposed designations may have some 
benefit to state and local resource agencies in that the proposed rule 
more clearly defines the essential feature and the areas in which that 
feature is found. It may also assist local governments in allowing them 
to engage in long-range planning (rather than waiting for case by-case 
ESA section 7 consultations to occur).

Energy Supply, Distribution, and Use (Executive Order 13211)

    Executive Order 13211 requires agencies to prepare Statements of 
Energy Effects when undertaking an action expected to lead to the 
promulgation of a final rule or regulation that is a significant 
regulatory action under E.O. 12866 and is likely to have a significant 
adverse effect on the supply, distribution, or use of energy. OMB 
Guidance on Implementing E.O. 13211 (July 13, 2001) states that 
significant adverse effects could include any of the following outcomes 
compared to a world without the regulatory action under consideration: 
(1) Reductions in crude oil supply in excess of 10,000 barrels per day; 
(2) reductions in fuel production in excess of 4,000 barrels per day; 
(3) reductions in coal production in excess of 5 million tons per year; 
(4) reductions in natural gas production in excess of 25 million cubic 
feet per year; (5) reductions in electricity production in excess of 1 
billion kilowatt-hours per year or in excess of 500 megawatts of 
installed capacity; (6) increases in energy use required by the 
regulatory action that exceed any of the thresholds above; (7) 
increases in the cost of energy production in excess of one percent; 
(8) increases in the cost of energy distribution in excess of one 
percent; or (9) other similarly adverse outcomes. A regulatory action 
could also have significant adverse effects if it: (1) Adversely 
affects in a material way the productivity, competition, or prices in 
the energy sector; (2) adversely affects in a material way 
productivity, competition or prices within a region; (3) creates a 
serious inconsistency or otherwise interferes with an action taken or 
planned by another agency regarding energy; or (4) raises novel legal 
or policy issues adversely affecting the supply, distribution or use of 
energy arising out of legal mandates, the President's priorities, or 
the principles set forth in E.O. 12866 and 13211.
    This rule, if finalized, will not have a significant adverse effect 
on the supply, distribution, or use of energy. Therefore, we have not 
prepared a Statement of Energy Effects.

Regulatory Flexibility Act (5 U.S.C. 601 et seq.)

    We prepared an initial regulatory flexibility analysis (IRFA) 
pursuant to section 603 of the Regulatory Flexibility Act (RFA) (5 
U.S.C. 601, et seq.). The IRFA analyzes the impacts to small entities 
that may be affected by the proposed designations and is included as 
Appendix B of the Draft Information Report and is available upon 
request (see ADDRESSES section). The IRFA is summarized below, as 
required by section 603 of the RFA.
    Our IRFA uses the best available information to identify the 
potential impacts of critical habitat on small entities. However, a 
number of uncertainties complicate quantification of these impacts. 
This includes (1) the fact that the manner in which these potential 
impacts will be allocated between large and small entities is unknown; 
and (2) as discussed in the main body of the report, uncertainty 
regarding the potential effects of critical habitat designations, which 
requires some categories of potential impacts be described 
qualitatively. This IRFA analysis therefore focuses on providing the 
best available information regarding the potential magnitude of impacts 
to small entities in affected industries. As the proposed critical 
habitat is marine habitat, this analysis references the number of small 
businesses in each affected industry that is associated with counties 
and territories sharing coastline with the designations.
    The total maximum annualized impacts to small entities are 
estimated to be $130,000, which represents approximately 90 percent of 
the total quantified incremental impacts forecasted to result from the 
proposed rule. This impact assumes that all of the incremental project 
modification costs

[[Page 76326]]

will be incurred by small entities. These impacts are anticipated to be 
borne by the small entities that obtain funds or permits from Federal 
agencies that consult with NMFS regarding the five coral species 
critical habitat in the next 10 years. Given the uncertainty regarding 
which small entities in a given industry will obtain funds or permits 
from Federal agencies that will need to consult with NMFS, this 
analysis estimates impacts to small entities under two different 
scenarios. These scenarios are intended to reflect the range of 
uncertainty regarding the number of small entities that may be affected 
by the designations and the potential impacts of critical habitat 
designations on their annual revenues within that range.
    Under Scenario 1, this analysis assumes that all third parties 
participating in future consultations are small, and that incremental 
impacts are distributed evenly across all of these entities. Scenario 1 
accordingly reflects a high estimate of the number of potentially 
affected small entities and a low estimate of the potential effect in 
terms of percent of revenue. This scenario therefore most likely 
overstates the number of small entities likely to be affected by the 
rule and potentially understates the revenue effect. This analysis 
anticipates that 43 small entities will collectively incur 
approximately $130,000 in annualized costs under Scenario 1. These 
costs are distributed between two industries: (1) Approximately $85,000 
expected to be borne by 38 entities engaged in coastal and in-water 
construction and dredging activities (NAICS Codes 237310, 237990, 
237990), and (2) approximately $43,000 expected to be borne by 5 
entities engaged in water quality activities (NAICS Codes 221112, 
324110, 221320). However, because these costs are shared among 38 and 5 
entities, respectively, annualized impacts of the rule are estimated to 
make up less than 0.05 percent of annual revenues for each affected 
small entity.
    Under Scenario 2, this analysis assumes costs associated with each 
consultation action are borne by a single small entity within an 
industry. This method understates the number of small entities affected 
but overstates the likely impacts on an entity. Therefore, this method 
arrives at a low estimate of potentially affected entities and a high 
estimate of potential effects on revenue, assuming that quantified 
costs represent a complete accounting of the costs likely to be borne 
by private entities. For the coastal and in-water construction and 
dredging industry, this scenario forecasts $85,000 in annualized 
impacts would be borne by a single small entity. Though this estimate 
is almost certainly an overstatement of the costs borne by a single 
small entity, the impact is nonetheless expected to result in impacts 
that are less than 3 percent of the average annual revenues for a small 
entity in this industry. Estimated annualized impacts under this 
scenario for the industries related to water quality are expected to be 
$48,000 and comprise less than 2 percent of annual revenues.
    While these scenarios present a broad range of potentially affected 
entities and the associated revenue effects, we expect the actual 
number of small entities affected and revenue effects will be somewhere 
in the middle. In other words, some subset greater than 2 and less than 
43 of the small entities will participate in section 7 consultations on 
the five corals' critical habitat and bear associated impacts annually. 
Regardless, our analysis demonstrates that, even if we assume a low-end 
estimate of affected small entities, the greatest potential revenue 
effect is still less than 3 percent.
    Even though we cannot definitively determine the numbers of small 
and large entities that may be affected by this proposed rule, there is 
no indication that affected project applicants would be only small 
entities or mostly small entities. It is unclear whether small entities 
would be placed at a competitive disadvantage compared to large 
entities. However, as described in the Draft Information Report, 
consultations and project modifications will be required based on the 
type of permitted action and its associated impacts on the essential 
critical habitat feature. Because the costs of many potential project 
modifications that may be required to avoid adverse modification of 
critical habitat are unit costs (e.g., per mile of shoreline, per cubic 
yard of sand moved), such that total project modification costs would 
be proportional to the size of the project, it is not unreasonable to 
assume that larger entities would be involved in implementing the 
larger projects with proportionally larger project modification costs.
    There are no record-keeping requirements associated with the rule. 
Similarly, there are no reporting requirements other than those that 
might be associated with reporting on the progress and success of 
implementing project modifications, which do not require specific 
skills to satisfy.
    No Federal laws or regulations duplicate or conflict with this 
proposed rule. However, other aspects of the ESA may overlap with the 
critical habitat designations. For instance, listing of the threatened 
corals under the ESA requires Federal agencies to consult with NMFS to 
avoid jeopardy to the species, and large portions of the proposed 
designations overlap with existing Acropora critical habitat. However, 
this analysis examines only the incremental impacts to small entities 
from these proposed critical habitat designations.
    The alternatives to the designations considered consisted of a no-
action alternative and an alternative based on identical geographic 
designations for each of the five corals. The no-action, or no 
designation, alternative would result in no additional ESA section 7 
consultations relative to the status quo of the species' listing. 
Critical habitat must be designated if prudent and determinable. NMFS 
determined that the proposed critical habitat is prudent and 
determinable, and the ESA requires critical habitat designation in that 
circumstance. Further, we have determined that the physical feature 
forming the basis for our critical habitat designations is essential to 
the corals' conservation, and conservation of these species will not 
succeed without this feature being available. Thus, the lack of 
protection of the critical habitat feature from adverse modification 
could result in continued declines in abundance of the five corals. We 
rejected this no action alternative because it does not provide the 
level of conservation necessary for the five Caribbean corals. In 
addition, declines in abundance of the five corals would result in loss 
of associated economic and other values these corals provide to 
society, such as recreational and commercial fishing and diving 
services and shoreline protection services. Thus, small entities 
engaged in some coral reef-dependent industries would be adversely 
affected by the continued declines in the five corals. As a result, the 
no action alternative is not necessarily a ``no cost'' alternative for 
small entities.
    The identical geographic designation alternative would designate 
exactly the same geography for each of the five corals (i.e., 0.5 to 90 
m throughout the maximum geographic extent of all the corals' ranges 
collectively). This alternative would likely result in the same number 
and complexity of consultations as the proposed rule, because 
collectively all of the units in the proposed rule cover the same 
geography as the identical geographic designation alternative. However, 
this alternative does not provide the appropriate conservation benefits 
for

[[Page 76327]]

each species, as it would designate areas in which one particular 
species may not exist (e.g., Dendrogyra cylindrus only occupies 1 to 25 
m). Therefore, we rejected the identical geographic designation 
alternative because it does not provide the level of conservation 
necessary for the five Caribbean corals. The agency seeks specific 
comments from small entities on its Initial Regulatory Flexibility Act 
analysis.

Coastal Zone Management Act

    We have determined that this action will have no reasonably 
foreseeable effects on the enforceable policies of approved Florida, 
Puerto Rico, and USVI coastal zone management plans. Upon publication 
of this proposed rule, these determinations will be submitted to 
responsible state agencies for review under section 307 of the Coastal 
Zone Management Act.

Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.)

    This proposed rule does not contain any new or revised collection 
of information requirements. This rule, if adopted, would not impose 
recordkeeping or reporting requirements on State or local governments, 
individuals, businesses, or organizations.

Unfunded Mandates Reform Act (2 U.S.C. 1501 et seq.)

    This proposed rule will not produce a Federal mandate. The 
designation of critical habitat does not impose a legally-binding duty 
on non-Federal government entities or private parties. The only 
regulatory effect is that Federal agencies must ensure that their 
actions are not likely to destroy or adversely modify critical habitat 
under section 7 of the ESA. Non-Federal entities that receive Federal 
funding, assistance, permits or otherwise require approval or 
authorization from a Federal agency for an action may be indirectly 
impacted by the designation of critical habitat, but the Federal agency 
has the legally binding duty to avoid destruction or adverse 
modification of critical habitat.
    We do not anticipate that this rule, if finalized, will 
significantly or uniquely affect small governments. Therefore, a Small 
Government Action Plan is not required.

Consultation and Coordination With Indian Tribal Governments (Executive 
Order 13175)

    The longstanding and distinctive relationship between the Federal 
and tribal governments is defined by treaties, statutes, executive 
orders, judicial decisions, and agreements, which differentiate tribal 
governments from the other entities that deal with, or are affected by, 
the Federal Government.
    This relationship has given rise to a special Federal trust 
responsibility involving the legal responsibilities and obligations of 
the United States toward Indian Tribes and with respect to Indian 
lands, tribal trust resources, and the exercise of tribal rights. 
Pursuant to these authorities, lands have been retained by Indian 
Tribes or have been set aside for tribal use. These lands are managed 
by Indian Tribes in accordance with tribal goals and objectives within 
the framework of applicable treaties and laws. Executive Order 13175, 
Consultation and Coordination with Indian Tribal Governments, outlines 
the responsibilities of the Federal Government in matters affecting 
tribal interests.
    In developing this proposed rule, we reviewed maps and did not 
identify any areas under consideration for critical habitat that 
overlap with Indian lands. Based on this, we preliminarily found the 
proposed critical habitat designations for threatened Caribbean corals 
do not have tribal implications.

References Cited

    A complete list of all references cited in this rulemaking can be 
found on our website at [https://www.fisheries.noaa.gov/action/proposed-rule-designate-critical-habitat-threatened-caribbean-corals] 
and is available upon request from the NMFS SERO in St. Petersburg, 
Florida (see ADDRESSES).

List of Subjects

50 CFR Part 223

    Endangered and threatened species, Exports, Imports, 
Transportation.

50 CFR Part 226

    Endangered and threatened species.

    Dated: September 22, 2020.
Samuel D. Rauch III,
Deputy Assistant Administrator for Regulatory Programs, National Marine 
Fisheries Service.

    For the reasons set out in the preamble, we propose to amend 50 CFR 
parts 223 and 226 as follows:

PART 223--THREATENED MARINE AND ANADROMOUS SPECIES

0
1. The authority citation for part 223 continues to read as follows:

    Authority:  16 U.S.C. 1531-1543; subpart B, Sec.  223.201-202 
issued under 16 U.S.C. 1361 et seq.; 16 U.S.C. 5503(d) for Sec.  
223.206(d)(9).

0
2. Amend Sec.  223.102(e), under the heading ``Corals'' by revising the 
entries ``Coral, boulder star''; ``Coral, lobed star''; ``Coral, 
mountainous star''; ``Coral, pillar''; and ``Coral, rough cactus''.


Sec.  223.102  Enumeration of threatened marine and anadromous species.

    (e) * * *

----------------------------------------------------------------------------------------------------------------
                           Species \1\
-----------------------------------------------------------------  Citation(s) for     Critical
                                                  Description of       listing          habitat       ESA rules
         Common name            Scientific name   listed entity   determination(s)
----------------------------------------------------------------------------------------------------------------
                                                     Corals
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
Coral, boulder star..........  Orbicella         Entire species.  79 FR 53852,             226.227  NA.
                                franksi.                           Sept. 10, 2014.
Coral, lobed star............  Orbicella         Entire species.  79 FR 53852,             226.227  NA.
                                annularis.                         Sept. 10, 2014.
Coral, mountainous star......  Orbicella         Entire species.  79 FR 53852,             226.227  NA.
                                faveolata.                         Sept. 10, 2014.
Coral, pillar................  Dendrogyra        Entire species.  79 FR 53852,             226.227  NA.
                                cylindrus.                         Sept. 10, 2014.
Coral, rough cactus..........  Mycetophyllia     Entire species.  79 FR 53852,             226.227  NA.
                                ferox.                             Sept. 10, 2014.
 
                                                  * * * * * * *
----------------------------------------------------------------------------------------------------------------
\1\ Species includes taxonomic species, subspecies, distinct population segments (DPSs) (for a policy statement,
  see 61 FR 4722; February 7, 1996), and evolutionarily significant units (ESUs) (for a policy statement, see 56
  FR 58612; November 20, 1991).


[[Page 76328]]

PART 226--DESIGNATED CRITICAL HABITAT

0
3. The authority citation for part 226 continues to read as follows:

    Authority:  16 U.S.C. 1533.

0
4. Add Sec.  226.227 to read as follows:


Sec.  226.227  Critical habitat for the Caribbean Boulder Star Coral 
(Orbicella franksi), Lobed Star Coral (O. annularis), Mountainous Star 
Coral (O. faveolata), Pillar Coral (Dendrogyra cylindrus), and Rough 
Cactus Coral (Mycetophyllia ferox).

    Critical habitat is designated in the following states and counties 
for the following species as depicted in the maps below and described 
in paragraphs (a) through (h) of this section. The maps can be viewed 
or obtained with greater resolution (https://www.fisheries.noaa.gov/action/proposed-rule-designate-critical-habitat-threatened-caribbean-corals) to enable a more precise inspection of proposed critical 
habitat for Orbicella franksi, O. annularis, O. faveolata, Dendrogyra 
cylindrus, and Mycetophyllia ferox.
    (a) Critical habitat locations. Critical habitat is designated for 
the following five Caribbean corals in the following states and 
counties, and offshore locations:

                                            Table 1 to paragraph (a)
----------------------------------------------------------------------------------------------------------------
            Species                                              State--counties
----------------------------------------------------------------------------------------------------------------
Orbicella annularis............  FL--Palm Beach, Broward, Miami-Dade, and Monroe.
                                 PR--All.
                                 USVI--All.
                                 Flower Garden Banks.
                                 Navassa Island.
O. faveolata...................  FL--Martin, Palm Beach, Broward, Miami-Dade, and Monroe.
                                 PR--All.
                                 USVI--All.
                                 Flower Garden Banks.
                                 Navassa Island.
O. franksi.....................  FL--Palm Beach, Broward, Miami-Dade, and Monroe.
                                 PR--All.
                                 USVI--All.
                                 Flower Garden Banks.
                                 Navassa Island.
Dendrogyra cylindrus...........  FL--Palm Beach, Broward, Miami-Dade, and Monroe.
                                 PR--All.
                                 USVI--All.
                                 Navassa Island.
Mycetophyllia ferox............  FL--Broward, Miami-Dade, and Monroe.
                                 PR--All.
                                 USVI--All.
                                 Navassa Island.
----------------------------------------------------------------------------------------------------------------

    (b) Critical habitat boundaries. Except as noted in paragraphs (d) 
and (e) of this section, critical habitat for the five Caribbean corals 
is defined as all marine waters in the particular depth ranges relative 
to mean low water as depicted in the maps below and described in the 
Table of the locations of the critical habitat units for Orbicella 
franksi, O. annularis, O. faveolata, Dendrogyra cylindrus, and 
Mycetophyllia ferox. Depth contours or other identified boundaries on 
the maps form the boundaries of the critical habitat units. 
Specifically, the COLREGS Demarcation Lines (33 CFR 80), the boundary 
between the South Atlantic Fishery Management Council (SAFMC) and the 
Gulf of Mexico Fishery Management Council (GMFMC; 50 CFR 600.105), the 
Florida Keys National Marine Sanctuary (15 CFR part 922 subpart P, 
appendix I), and the Caribbean Island Management Area (50 CFR part 622, 
appendix E), create portions of the boundaries in several units.

 Table 2 to Paragraph (c)--Table of the Locations of the Critical Habitat Units for Orbicella franksi, O. annularis, O. faveolata, Dendrogyra cylindrus,
                                                                 and Mycetophyllia ferox
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                       Critical  habitat unit
               Species                          name                   Location              Geographic extent                Water depth range
--------------------------------------------------------------------------------------------------------------------------------------------------------
Orbicella annularis.................  OANN-1.................  Florida................  Lake Worth Inlet, Palm       2-20 m, (6.5-65.6 ft).
                                                                                         Beach County to Government
                                                                                         Cut, Miami-Dade County.
                                                               Florida................  Government Cut, Miami-Dade   0.5-20m, (1.6-65.6 ft).
                                                                                         County to Dry Tortugas.
                                      OANN-2.................  Puerto Rico............  All islands................  0.5-20m, (1.6-65.6 ft).
                                      OANN-3.................  USVI...................  All islands of St. Thomas    0.5-20m, (1.6-65.6 ft).
                                                                                         and St. John.
                                      OANN-4.................  USVI...................  All islands of St. Croix...  0.5-20m, (1.6-65.6 ft).
                                      OANN-5.................  Navassa................  Navassa Island.............  0.5-20m, (1.6-65.6 ft).
                                      OANN-6.................  FGB....................  East Flower Garden Bank and  17-90 m, (55-295 ft).
                                                                                         West Flower Garden Bank.
Orbicella faveolata.................  OFAV-1.................  Florida................  St. Lucie Inlet, Martin      2-90 m, (6.5-295 ft).
                                                                                         County to Government Cut,
                                                                                         Miami-Dade County.
                                                               Florida................  Government Cut, Miami-Dade   0.5-90 m, (1.6-295 ft).
                                                                                         County to Dry Tortugas.
                                      OFAV-2.................  Puerto Rico............  All islands of Puerto Rico.  0.5-90 m, (1.6-295 ft).

[[Page 76329]]

 
                                      OANN-3.................  USVI...................  All islands of St. Thomas    0.5-90 m, (1.6-295 ft).
                                                                                         and St. John.
                                      OFAV-4.................  USVI...................  All islands of St. Croix...  0.5-90 m, (1.6-295 ft).
                                      OFAV-5.................  Navassa................  Navassa Island.............  0.5-90 m, (1.6-295 ft).
                                      OFAV-6.................  FGB....................  East Flower Garden Bank and  17-90 m, (55-295 ft).
                                                                                         West Flower Garden Bank.
Orbicella franksi...................  OFRA-1.................  Florida................  St. Lucie Inlet, Martin      2-90 m, (6.5-295 ft).
                                                                                         County to Government Cut,
                                                                                         Miami-Dade County.
                                                               Florida................  Government Cut, Miami-Dade   0.5-90 m, (1.6-295 ft).
                                                                                         County to Dry Tortugas.
                                      OFRA-2.................  Puerto Rico............  All islands of Puerto Rico.  0.5-90 m, (1.6-295 ft).
                                      OFRA-3.................  USVI...................  All islands of St. Thomas    0.5-90 m, (1.6-295 ft).
                                                                                         and St. John.
                                      OFRA-4.................  USVI...................  All islands of St. Croix...  0.5-90 m, (1.6-295 ft).
                                      OFRA-5.................  Navassa................  Navassa Island.............  0.5-90 m, (1.6-295 ft).
                                      OFRA-6.................  FGB....................  East Flower Garden Bank and  17-90 m, (55-295 ft).
                                                                                         West Flower Garden Bank.
Dendrogyra cylindrus................  DCYL-1.................  Florida................  Lake Worth Inlet, Palm       2-25 m, (6.5-82 ft).
                                                                                         Beach County to Government
                                                                                         Cut, Miami-Dade County.
                                                               Florida................  Government Cut, Miami-Dade   1-25 m, (3.3-82 ft).
                                                                                         County to Dry Tortugas.
                                      DCYL-2.................  Puerto Rico............  All islands................  1-25 m, (3.3-82 ft).
                                      DCYL-3.................  USVI...................  All islands of St. Thomas    1-25 m, (3.3-82 ft).)
                                                                                         and St. John.
                                      DCYL-4.................  USVI...................  All islands of St. Croix...  1-25 m, (3.3-82 ft).
                                      DCYL-5.................  Navassa................  Navassa Island.............  1-25 m, (3.3-82 ft)).
Mycetophyllia ferox.................  MFER-1.................  Florida................  Broward County to Dry        5-90 m, (16.4-295 ft).
                                                                                         Tortugas.
                                      MFER-2.................  Puerto Rico............  All islands of Puerto Rico.  5-90 m, (16.4-295 ft).
                                      MFER-3.................  USVI...................  All islands of St. Thomas    5-90 m, (16.4-295 ft).
                                                                                         and St. John.
                                      MFER-4.................  USVI...................  All islands of St. Croix...  5-90 m, (16.4-295 ft).
                                      MFER-5.................  Navassa................  Navassa Island.............  5-90 m, (16.4-295 ft).
--------------------------------------------------------------------------------------------------------------------------------------------------------

    (c) Essential feature. The feature essential to the conservation of 
Orbicella franksi, O. annularis, O. faveolata, Dendrogyra cylindrus, 
and Mycetophyllia ferox is: Reproductive, recruitment, growth, and 
maturation habitat. Sites that support the normal function of all life 
stages of threatened corals are natural, consolidated hard substrate or 
dead coral skeleton, which is free of algae and sediment at the 
appropriate scale at the point of larval settlement or fragment 
reattachment, and the associated water column. Several attributes of 
these sites determine the quality of the area and influence the value 
of the associated feature to the conservation of the species:
    (1) Substrate with the presence of crevices and holes that provide 
cryptic habitat, the presence of microbial biofilms, or presence of 
crustose coralline algae;
    (2) Reefscape with no more than a thin veneer of sediment and low 
occupancy by fleshy and turf macroalgae;
    (3) Marine water with levels of temperature, aragonite saturation, 
nutrients, and water clarity that have been observed to support any 
demographic function; and
    (4) Marine water with levels of anthropogenically-introduced (from 
humans) chemical contaminants that do not preclude or inhibit any 
demographic function.
    (d) Areas not included in critical habitat. Critical habitat does 
not include the following particular areas where they overlap with the 
areas described in paragraphs (a) through (c) of this section:
    (1) Pursuant to ESA section 4(a)(3)(B), all areas subject to the 
2014 Naval Air Station Key West Integrated Natural Resources Management 
Plan.
    (2) Pursuant to ESA section 3(5)(A)(i)(I), areas where the 
essential feature does not occur;
    (3) Pursuant to ESA section 3(5)(A)(i)(I), all managed areas that 
may contain natural hard substrate but do not provide the quality of 
substrate essential for the conservation of threatened corals. Managed 
areas that do not provide the quality of substrate essential for the 
conservation of the five Caribbean corals are defined as particular 
areas whose consistently disturbed nature renders them poor habitat for 
coral growth and survival over time. These managed areas include 
specific areas where the substrate has been disturbed by planned 
management authorized by local, state, or Federal governmental entities 
at the time of critical habitat designation, and will continue to be 
periodically disturbed by such management. Examples include, but are 
not necessarily limited to, dredged navigation channels, shipping 
basins, vessel berths, and active anchorages. Specific federally-
authorized channels and harbors considered as managed areas not 
included in the designations are:
    (i) St. Lucie Inlet.
    (ii) Palm Beach Harbor.
    (iii) Hillsboro Inlet.
    (iv) Port Everglades.
    (v) Baker's Haulover Inlet.
    (vi) Miami Harbor.
    (vii) Key West Harbor.
    (viii) Arecibo Harbor.
    (ix) San Juan Harbor.
    (x) Fajardo Harbor.
    (xi) Ponce Harbor.
    (xii) Mayaguez Harbor.
    (xiii) St. Thomas Harbor.
    (xiv) Christiansted Harbor.
    (4) Pursuant to ESA section 3(5)(A)(i), artificial substrates 
including but not limited to: Fixed and floating structures, such as 
aids-to-navigation (AToNs), seawalls, wharves, boat ramps, fishpond 
walls, pipes, submarine cables, wrecks, mooring balls, docks, and 
aquaculture cages.
    (e) Areas excluded from critical habitat. Pursuant to ESA Section 
4(b)(2), the following area is excluded from critical habitat where it 
overlaps with the areas described in paragraphs (a) through (c) of this 
section: The designated restricted area managed by the South Florida 
Ocean Measuring Facility, defined in 33 CFR 334.580.

[[Page 76330]]

    (f) Maps. Critical habitat maps for the Caribbean Boulder Star 
Coral, Lobed Star Coral, Mountainous Star Coral, Pillar Coral, and 
Rough Cactus Coral:
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[FR Doc. 2020-21229 Filed 11-25-20; 8:45 am]
BILLING CODE 3510-22-C