Dear ESA Colleagues, 

The following is a request to the Ecological Society of America's listserve for 
Ph.D. level scientists 
with expertise in conservation to sign onto a letter opposing the Trump 
administration's proposed 
changes to the regulations implementing the ESA.  The letter and a form for 
signing on can be found 
at this link:   

https://goo.gl/forms/yj2mqyIyc15t9HKn2

The deadline to sign on is Friday, September 21. 

Please consider signing on to this scientists letter opposing the Trump 
administration's proposed 
changes to the regulations guiding implementation of the Endangered Species 
Act. If enacted, these 
proposed regulatory changes will severely erode protections for endangered 
species and ensure 
more species are lost to extinction. Further, they will fundamentally undermine 
the ability of science 
and scientists to protect our nation’s biodiversity. 

Text of the letter is as follows:

________________________________

September ##, 2018

Secretary Ryan Zinke
U.S. Department of the Interior 
1849 C Street, N.W.
Washington, DC  20240

Secretary Wilbur Ross
U.S. Department of Commerce
1401 Constitution Ave., NW
Washington, DC 20230

Dear Secretary Zinke and Secretary Ross,

As scientists with expertise in biological diversity and endangered species, we 
are writing to oppose 
proposed changes to the regulations guiding implementation of the Endangered 
Species Act, 
including revisions to the regulations for interagency cooperation, listing 
species and designating 
critical habitat and prohibitions to threatened wildlife and plants (Docket 
Numbers: FWS-HQ-ES-
2018 0006, 0007 and 0009).  If enacted, these proposed regulatory changes will 
severely erode 
protections for endangered species and ensure more species are lost to 
extinction.  We respectfully 
request withdrawal of the three rules.

THE PROPOSED DEFINITION OF ADVERSE MODIFICATION FAILS TO PROTECT CRITICAL 
HABITAT 
NECESSARY FOR ENDANGERED SPECIES RECOVERY

With limited exceptions, the Endangered Species Act requires the designation of 
critical habitat for 
threatened and endangered species.  Federal agencies are prohibited from 
funding, permitting or 
carrying out actions that destroy or adversely modify critical habitat.  They 
avoid adverse 
modification through consultation with the National Marine Fisheries Service 
for marine and 
anadromous species and the U.S. Fish and Wildlife Service for all other 
species.  Because destruction 
of habitat remains the predominant cause of species endangerment, these 
provisions are paramount 
to endangered species recovery.  

The proposed regulations for interagency cooperation define adverse 
modification as an “alteration 
that appreciably diminishes the value of critical habitat as a whole for the
conservation of a listed species.” Based on our extensive experience with 
endangered species 
recovery, we do not believe this definition will ensure the maintenance of 
critical habitat necessary to 
sustain species survival and recovery.  The definition will allow activities to 
destroy or modify critical 
habitat so long as they don’t affect “the whole” of critical habitat, which 
particularly for species with 
large ranges will allow most if not all destructive actions to move forward.  
This in turn allows for the 
possibility of destructive actions that cumulatively impact the entirety of a 
species’ critical habitat. 

We know of many species that are threatened by such cumulative impacts and thus 
do not believe 
this definition of adverse modification comports with the purposes of the 
Endangered Species Act to 
ensure the survival and recovery of threatened and endangered species.  We thus 
request this 
proposed revision be withdrawn and the Services adopt a definition of adverse 
modification that 
focuses the analysis of what constitutes adverse modification of critical 
habitat at a biologically 
meaningful scale, such as recovery or critical habitat units.  

THE PROPOSED REGULATIONS WILL SHARPLY LIMIT THE DESIGNATION OF CRITICAL HABITAT 
FOR 
THREATENED AND ENDANGERED SPECIES    

Given the importance of protecting habitat to the survival and recovery of 
endangered species, we 
are concerned about provisions in the proposed regulations that will expand the 
circumstances under 
which species do not receive designated critical habitat.  The Services propose 
to not designate 
critical habitat when the primary threats to a species are climate change, 
disease or other factors 
besides direct destruction or modification of habitat based on the premise that 
such species would 
not benefit from protection of habitat.  This premise has no basis in the 
scientific literature and is 
unsupportable. Species facing such intractable threats as climate change or 
disease, need habitat 
protection to ensure that those places where they are managing to survive in 
the face of threats are 
not destroyed and to provide habitat for species migration in response to 
climate change driven 
habitat changes.  Failure to provide such habitat protection will almost 
certainly result in more 
species going extinct as our world undergoes the rapid changes projected under 
global warming or 
because of rapid spread of novel pathogens related to globalization.       

In addition to limiting the circumstances under which species receive critical 
habitat, the Services 
propose to limit designation of unoccupied areas as critical habitat.  Under 
the proposed regulations, 
critical habitat would only be designated in unoccupied habitat, if the 
currently occupied range of a 
species was found to be inadequate to ensure the conservation of a species and 
if “there is a 
reasonable likelihood that the area will contribute to the conservation of the 
species.” The Services 
already rarely designate unoccupied areas as critical habitat and these 
restrictions will only make it 
rarer.  The requirement that the Services first determine that occupied areas 
are insufficient to 
conserve species will encourage a reductionist view in which only species 
viability is considered and 
other factors, such as the ecological role of species in ecosystems, are 
ignored.  The requirement 
that an area has a likelihood of contributing to the conservation of a species 
will give private 
landowners opposed to endangered species conservation veto power over 
designation on their lands 
simply by stating opposition to recovering species.   

Designation of unoccupied habitat is the only mechanism in the Act that 
protects historic habitat for 
species, which because most endangered species have lost substantial ground, is 
critically 
important.  As such, these proposals are clearly not in the interest of 
conserving species and we ask 
they be withdrawn.       

REMOVAL OF THE BLANKET 4(D) RULE WOULD WEAKEN PROTECTION FOR THREATENED SPECIES 
AND EXPOSE THE LISTING PROGRAM TO FURTHER POLITICAL INTERFERENCE

We have serious concerns about the U.S. Fish and Wildlife Service’s proposal to 
rescind what is 
known as the blanket 4(d) rule, which for 40 years, has provided essential 
protections to threatened 
species. This rule automatically applied the prohibition against take afforded 
endangered species to 
threatened species, which includes killing, harm, harassment and habitat 
destruction. In the absence 
of this rule, we’re concerned threatened species will in many cases, be 
afforded little to no 
protections and that political pressure will lead to endangered species being 
listed as threatened in 
order to exempt specific threats.  We’re also concerned that having to create 
an individual rule 
specifying prohibited activities for every threatened species will further 
burden the Service’s already 
over-burdened listing program, which faces a backlog of more than 500 species 
and has consistently 
fallen short of statutory deadlines intended to ensure species receive timely 
protection.  We request 
the Service retain the blanket 4(d) rule and instead create individual special 
rules for species on a 
case by case basis where more specific or tailored protections are needed.   

THE PROPOSED REGULATIONS WOULD INTRODUCE IMPROPER CONSIDERATION OF ECONOMIC 
FACTORS IN DETERMINATIONS OF SPECIES STATUS

In direct contravention of the statute, the proposed regulations would allow 
consideration of 
economic impacts when determining if species warrant protection as threatened 
or endangered 
species.  In 1982, Congress clarified that when determining the status of a 
species, the Services 
must rely “solely” on the “basis of the best scientific and commercial data 
available.”  Despite this 
clear Congressional direction, the administration now proposes to remove the 
regulatory phrase 
“without reference to possible economic or other impacts” with the specific 
intent of including 
discussion of economic impacts into assessments of species status.  We are 
concerned that such a 
move will have a similar adverse effect to the removal of the blanket 4(d) 
rule, further burden the 
Service’s listing program and result in species not receiving protection 
because the short-term 
economic impacts are considered too high.  Such outcomes run directly counter 
to the primary 
purpose of the Act to save species from extinction.  

In sum, the proposed regulatory changes will do nothing to further conservation 
of endangered 
species and much to undermine it.  If enacted, the rule changes will 
fundamentally undermine the 
ability of science and scientists to protect our nation’s biodiversity and we 
thus ask that all three be 
rescinded. 


Sincerely, 

John A. Vucetich, Professor
Michigan Technological University

Stuart Pimm 
Doris Duke Professor of Conservation, Duke University

Adrian Treves 
Professor, University of Wisconsin–Madison

Michael Paul Nelson
Professor, Oregon State University

Jeremy T. Bruskotter
Associate Professor, Ohio State University

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