Evan Grant, Ph.D.
Evan Grant the principle investigator of the US Geological Survey’s Amphibian Research and Monitoring Initiative (ARMI), northeast region.
Evan's research focuses on questions relating to amphibian populations, specifically with respect to their landscape-scale ecology. Evan also uses decision science to aid resource managers.
Education:
- PhD, 2009, University of Maryland College Park, Program of Marine, Estuarine and Environmental Sciences and Department of Entomology
- BS, 2001, Cornell University, Natural Resources, with Distinction in Research
ResearcherID: N-5160-2014
Research Gate profile: http://www.researchgate.net/profile/Evan_Grant2
Science and Products
Filter Total Items: 20
Structured Decision Making
The biggest natural resource management challenges include competing views of the value and uses of those resources in society. Patuxent scientists develop methods to manage resources given those competing views under a “structured decision making” (SDM) framework. Our scientists both practice and train others in key SDM skills, such as model development and monitoring design.
Assessing Amphibian Disease Risk in the Northeast
Disease in amphibian populations can have a range of effects, from devastating declines following introduction of a novel pathogen to recurring breakout events on a landscape. Elucidating mechanisms underlying the effects of diseases on amphibian populations is crucial to help managers make appropriate decisions to achieve management goals for amphibians.
Mapping Climate Change Resistant Vernal Pools in the Northeastern U.S.
Vernal pools are small, seasonal wetlands that provide critically important seasonal habitat for many amphibian species of conservation concern. Natural resource managers and scientists in the Northeast, as well as the Northeast Refugia Research Coalition, coordinated by the Northeast CSC, recently identified vernal pools as a priority ecosystem to study, and recent revisions to State Wildlife Act
Managing the Extinction Risk of the Shenandoah Salamander
The Shenandoah salamander is an endangered salamander that is at risk of extinction due to its small, high-elevation range, competition with the co-occurring red-backed salamander, and the predicted future climate in the Appalachian mountain range. We are working with multiple partners to understand the current status of the species, predict future extinction risk, and continually engage...
North American Amphibian Monitoring Program
The North American Amphibian Monitoring Program (NAAMP) was a collaborative citizen science effort between the US Geological Survey (USGS) and 26 partners (state agencies, universities, and nonprofit organizations) for monitoring calling amphibian populations over much of the eastern and central United States. Initiated in 1997, in response to needs set forth by the Declining Amphibian Populations...
Understanding the Future of Red-Backed Salamanders as an Indicator of Future Forest Health
Climate change will have sweeping impacts across the Northeast, yet there are key gaps in our understanding about whether species will be able to adapt to this changing environment. Results from this project will illuminate local and region-wide changes in forest ecosystems by studying the red-backed salamander, a species that is a strong indicator of forest conditions. This study identified habit
Elucidating mechanisms underlying amphibian declines in North America using hierarchical spatial models
Amphibian populations are declining globally at unprecedented rates but statistically rigorous identification of mechanisms is lacking. Identification of reasons underlying large-scale declines is imperative to plan and implement effective conservation efforts. Most research on amphibian population decline has focused on local populations and local factors. However, the ubiquity of declines across
Projecting the Future of Headwater Streams to Inform Management Decisions
There is growing evidence that headwater stream ecosystems are especially vulnerable to changing climate and land use, but managers are challenged by the need to address these threats at a landscape scale, often through coordination with multiple management agencies and landowners. This project sought to provide an example of cooperative landscape decision-making by addressing the conservation of
Filter Total Items: 15
Range position and climate sensitivity: the structure of among-population demographic responses to climatic variation
This data set is comprised of four files related to the counts of wood frog (Lithobates sylvaticus) egg masses in the Northeast United States and climatic information derived for the count locations. One file contains data for the counts at all locations, the other files contain derived temperature and precipitation data for models used in the published manuscript.
Count and detection-nondetection survey data of barred owls (Strix varia) in historical breeding territories of Northern Spotted Owls (Strix occidentalis caurina) in the Oregon Coast Range, 1995-2016
This dataset contains count and detection-nondetection data of Barred Owls from 106 historical breeding territories of Northern Spotted Owl territories (i.e. sites) in the Oregon Coast Ranges from 1995 to 2016. Data collected from 1995 to 2014 are partitioned into 2-week periods from 1 March - 31 August each year, totaling 12 possible sampling periods per year. Data collected from 2015 and 2016 ar
North American Amphibian Monitoring Program (NAAMP) anuran detection data from the eastern and central United States (1994-2015)
The North American Amphibian Monitoring Program (NAAMP) was a collaborative citizen science effort between the US Geological Survey (USGS) and 26 Partners (state agencies, universities, and nonprofits) for monitoring calling amphibian populations over much of the eastern and central United States. Initiated in 1997 in response to needs set forth by the Declining Amphibian Populations Task Force i
Filter Total Items: 130
Early treatment of white-nose syndrome is necessary to stop population decline
Since its introduction to North America, white-nose syndrome has been associated with declines greater than 90% in several bat species, prompting the development of treatments to reduce disease-related mortality. As treatment application is scaled up, predicting responses at the population level will help in the development of management plans.We develop a model allowing for the implementation of
Authors
John Forrest Grider, Wayne E. Thogmartin, Evan H. Campbell Grant, Riley F. Bernard, Robin E. Russell
Speciation with gene flow in a narrow endemic West Virginia cave salamander (Gyrinophilus subterraneus)
Due to their limited geographic distributions and specialized ecologies, cave species are often highly endemic and can be especially vulnerable to habitat degradation within and surrounding the cave systems they inhabit. We investigated the evolutionary history of the West Virginia Spring Salamander (Gyrinophilus subterraneus), estimated the population trend from historic and current survey data,
Authors
Evan H. Campbell Grant, Kevin P. Mulder, Adrianne B. Brand, Douglas B. Chambers, Addison H. Wynn, Grace Capshaw, Matthew L. Niemiller, John G. Phillips, Jeremy F. Jacobs, Shawn R. Kuchta, Rayna C. Bell
Diverse aging rates in ectothermic tetrapods provide insights for the evolution of aging and longevity
Comparative studies of mortality in the wild are necessary to understand the evolution of aging; yet, ectothermic tetrapods are underrepresented in this comparative landscape, despite their suitability for testing evolutionary hypotheses. We present a study of aging rates and longevity across wild tetrapod ectotherms, using data from 107 populations (77 species) of nonavian reptiles and amphibians
Authors
Beth A. Reinke, Hugo Cayuela, Fredric J. Janzen, Jean-François Lemaitre, Jean-Michel Gaillard, A. Michelle Lawing, John B. Iverson, Ditte G Christiansen, Iñigo Martínez-Solano, Gregorio Sánchez-Montes, Jorge Gutiérrez-Rodríguez, Francis L Rose, Nicola J. Nelson, Susan Keall, Alain J Crivelli, Theodoros Nazirides, Annegret Grimm-Seyfarth, Klaus Henle, Emiliano Mori, Gaëtan Guiller, Rebecca Homan, Anthony Olivier, Erin L. Muths, Blake R. Hossack, Xavier Bonnet, David Pilliod, Marieke Lettink, Tony Whitaker, Benedikt R. Schmidt, Michael G. Gardner, Marc Cheylan, Françoise Poitevin, Ana Golubović, Ljiljana Tomović, Dragan Arsovski, Richard A Griffiths, Jan W. Arntzen, Jean-Pierre Baron, Jean-François Le Galliard, Thomas Tully, Luca Luiselli, Massimo Capula, Lorenzo Rugiero, Rebecca McCaffery, Lisa A Eby, Briggs-Gonzalez; Venetia, Frank Mazzotti, David M. Pearson, Brad A. Lambert, David M. Green, Nathalie Jreidini, Claudio Angelini, Graham Pyke, Jean-Marc Thirion, Pierre Joly, Jean-Paul Léna, Tony Tucker, Col Limpus, Pauline Priol, Aurélien Besnard, Pauline Bernard, Kristin Stanford, Richard S. King, Justin M Garwood, Jaime Bosch, Franco Souza, Jaime Bertoluci, Shirley Famelli, Kurt Grossenbacher, Omar Lenzi, Kathleen Matthews, Sylvain Boitaud, Deanna H. Olson, Tim Jessop, Graeme Gillspie, Jean Clobert, Murielle Richard, Andrés Valenzuela-Sánchez, Gary M. Fellers, Patrick M. Kleeman, Brian J. Halstead, Evan H. Campbell Grant, Phillip G Byrne, Thierry Frétey, Gernard Le Garff, Pauline Levionnois, John C. Maerz, Julian Pichenot, Kurtulus Olgun, Nazan Üzüm, Aziz Avcı, Claude Miaud, Johan Elmberg, Gregory P Brown, Richard Shine, Nathan F Bendik, Lisa O'Donnell, Courtney L. Davis, Michael J Lannoo, Rochelle M Stiles, Robert M Cox, Aaron M Reedy, Daniel A. Warner, Eric Bonnaire, Kristine Grayson, Roberto Ramos-Targarona, Eyup Baskale, David J. Muñoz, John Measey, F. Andre de Villiers, Will Selman, Victor Ronget, Anne M. Bronikowski, David A W Miller
Ignoring species availability biases occupancy estimates in single-scale occupancy models
Most applications of single-scale occupancy models do not differentiate between availability and detectability, even though species availability is rarely equal to one. Species availability can be estimated using multi-scale occupancy models; however, for the practical application of multi-scale occupancy models, it can be unclear what a robust sampling design looks like and what the statistical p
Authors
Graziella Vittoria Direnzo, David A. W. Miller, Evan H. Campbell Grant
Amphibian mucus triggers a developmental transition in the frog-killing chytrid fungus
The frog-killing chytrid fungus Batrachochytrium dendrobatidis (Bd) is decimating amphibian populations around the world. Bd has a biphasic life cycle, alternating between motile zoospores that disperse within aquatic environments and sessile sporangia that grow within the mucus-coated skin of amphibians. Zoospores lack cell walls and swim rapidly through aquatic environments using a posterior fla
Authors
Kristyn A. Robinson, Sarah M. Prostak, Evan H. Campbell Grant, Lillian K. Fritz-Laylin
Evaluating the risk of SARS-CoV-2 transmission to bats in the context of wildlife research, rehabilitation, and control
Preventing wildlife disease outbreaks is a priority for natural resource agencies, and management decisions can be urgent, especially in epidemic circumstances. With the emergence of SARS-CoV-2, wildlife agencies were concerned whether the activities they authorize might increase the risk of viral transmission from humans to North American bats, but had a limited amount of time in which to make de
Authors
Jonathan D. Cook, Evan H. Campbell Grant, Jeremy T. H. Coleman, Jonathan M. Sleeman, Michael C. Runge
A comparison of monitoring designs to assess wildlife community parameters across spatial scales
Dedicated long-term monitoring at appropriate spatial and temporal scales is necessary to understand biodiversity losses and develop effective conservation plans. Wildlife monitoring is often achieved by obtaining data at a combination of spatial scales, ranging from local to broad, to understand the status, trends, and drivers of individual species or whole communities and their dynamics. However
Authors
Alexander Wright, Evan H. Campbell Grant, Elise F. Zipkin
Looking ahead, guided by the past: The role of U.S. national parks in amphibian research and conservation
Protected areas like national parks are essential elements of conservation because they limit human influence on the landscape, which protects biodiversity and ecosystem function. The role of national parks in conservation, however, often goes far beyond limiting human influence. The U.S. National Park Service and its system of land units contribute substantively to conservation by providing prote
Authors
Brian J. Halstead, Andrew M. Ray, Erin L. Muths, Evan H. Campbell Grant, Rob Grasso, Michael J. Adams, Kathleen Semple Delaney, Jane Carlson, Blake R. Hossack
Summary and synthesis of 15 years of the Amphibian Vital Sign monitoring in the National Capital Region Inventory and Monitoring Network
The amphibian monitoring program, designed and conducted by the U.S. Geological Survey’s
Amphibian Research and Monitoring Initiative program, is designed to estimate the status and trends of amphibian populations to assist management decisions in individual parks and across the National Capital Region Network. Detection/non-detection data for stream and wetland habitats has been collected in 2 pa
Authors
Evan H. Campbell Grant, Adrianne Brand, AD Wright
Site- and individual-level contaminations affect infection prevalence of an emerging infectious disease of amphibians
Emerging infectious disease outbreaks are one of multiple stressors responsible for amphibian declines globally. In the northeastern United States, ranaviral diseases are prevalent in amphibians and other ectothermic species, but there is still uncertainty as to whether their presence is leading to population level effects. Further, there is also uncertainty surrounding the potential interactions
Authors
Kelly L. Smalling, Brittany A. Mosher, Luke R. Iwanowicz, Keith Loftin, Adam Boehlke, Michelle Hladik, Carly R. Muletz-Wolz, Nandadevi Córtes-Rodríguez, Robin Femmer, Evan H. Campbell Grant
By
Ecosystems Mission Area, Water Resources Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology, Eastern Ecological Science Center, California Water Science Center, Geology, Geophysics, and Geochemistry Science Center, Kansas Water Science Center, New Jersey Water Science Center
Geographic variation and thermal plasticity shape salamander metabolic rates under current and future climates
Predicted changes in global temperature are expected to increase extinction risk for ectotherms, primarily through increased metabolic rates. Higher metabolic rates generate increased maintenance energy costs which are a major component of energy budgets. Organisms often employ plastic or evolutionary (e.g., local adaptation) mechanisms to optimize metabolic rate with respect to their environment.
Authors
D. J. Munoz, D. A. W. Miller, R. Schilder, Evan H. Campbell Grant
Evaluating the effect of expert elicitation techniques on population status assessment in the face of large uncertainty
Population projection models are important tools for conservation and management. They are often used for population status assessments, for threat analyses, and to predict the consequences of conservation actions. Although conservation decisions should be informed by science, critical decisions are often made with very little information to support decision-making. Conversely, postponing decision
Authors
Jennifer F. Moore, Julien Martin, Hardin Waddle, Evan H. Campbell Grant, Jillian Elizabeth Fleming, Eve Bohnett, Thomas S.B. Akre, Donald J. Brown, Michael T. Jones, Jessica R. Meck, Kevin J. Oxenrider, Anthony Tur, Lisabeth L. Willey, Fred A Johnson
Science and Products
Filter Total Items: 20
Structured Decision Making
The biggest natural resource management challenges include competing views of the value and uses of those resources in society. Patuxent scientists develop methods to manage resources given those competing views under a “structured decision making” (SDM) framework. Our scientists both practice and train others in key SDM skills, such as model development and monitoring design.
Assessing Amphibian Disease Risk in the Northeast
Disease in amphibian populations can have a range of effects, from devastating declines following introduction of a novel pathogen to recurring breakout events on a landscape. Elucidating mechanisms underlying the effects of diseases on amphibian populations is crucial to help managers make appropriate decisions to achieve management goals for amphibians.
Mapping Climate Change Resistant Vernal Pools in the Northeastern U.S.
Vernal pools are small, seasonal wetlands that provide critically important seasonal habitat for many amphibian species of conservation concern. Natural resource managers and scientists in the Northeast, as well as the Northeast Refugia Research Coalition, coordinated by the Northeast CSC, recently identified vernal pools as a priority ecosystem to study, and recent revisions to State Wildlife Act
Managing the Extinction Risk of the Shenandoah Salamander
The Shenandoah salamander is an endangered salamander that is at risk of extinction due to its small, high-elevation range, competition with the co-occurring red-backed salamander, and the predicted future climate in the Appalachian mountain range. We are working with multiple partners to understand the current status of the species, predict future extinction risk, and continually engage...
North American Amphibian Monitoring Program
The North American Amphibian Monitoring Program (NAAMP) was a collaborative citizen science effort between the US Geological Survey (USGS) and 26 partners (state agencies, universities, and nonprofit organizations) for monitoring calling amphibian populations over much of the eastern and central United States. Initiated in 1997, in response to needs set forth by the Declining Amphibian Populations...
Understanding the Future of Red-Backed Salamanders as an Indicator of Future Forest Health
Climate change will have sweeping impacts across the Northeast, yet there are key gaps in our understanding about whether species will be able to adapt to this changing environment. Results from this project will illuminate local and region-wide changes in forest ecosystems by studying the red-backed salamander, a species that is a strong indicator of forest conditions. This study identified habit
Elucidating mechanisms underlying amphibian declines in North America using hierarchical spatial models
Amphibian populations are declining globally at unprecedented rates but statistically rigorous identification of mechanisms is lacking. Identification of reasons underlying large-scale declines is imperative to plan and implement effective conservation efforts. Most research on amphibian population decline has focused on local populations and local factors. However, the ubiquity of declines across
Projecting the Future of Headwater Streams to Inform Management Decisions
There is growing evidence that headwater stream ecosystems are especially vulnerable to changing climate and land use, but managers are challenged by the need to address these threats at a landscape scale, often through coordination with multiple management agencies and landowners. This project sought to provide an example of cooperative landscape decision-making by addressing the conservation of
Filter Total Items: 15
Range position and climate sensitivity: the structure of among-population demographic responses to climatic variation
This data set is comprised of four files related to the counts of wood frog (Lithobates sylvaticus) egg masses in the Northeast United States and climatic information derived for the count locations. One file contains data for the counts at all locations, the other files contain derived temperature and precipitation data for models used in the published manuscript.
Count and detection-nondetection survey data of barred owls (Strix varia) in historical breeding territories of Northern Spotted Owls (Strix occidentalis caurina) in the Oregon Coast Range, 1995-2016
This dataset contains count and detection-nondetection data of Barred Owls from 106 historical breeding territories of Northern Spotted Owl territories (i.e. sites) in the Oregon Coast Ranges from 1995 to 2016. Data collected from 1995 to 2014 are partitioned into 2-week periods from 1 March - 31 August each year, totaling 12 possible sampling periods per year. Data collected from 2015 and 2016 ar
North American Amphibian Monitoring Program (NAAMP) anuran detection data from the eastern and central United States (1994-2015)
The North American Amphibian Monitoring Program (NAAMP) was a collaborative citizen science effort between the US Geological Survey (USGS) and 26 Partners (state agencies, universities, and nonprofits) for monitoring calling amphibian populations over much of the eastern and central United States. Initiated in 1997 in response to needs set forth by the Declining Amphibian Populations Task Force i
Filter Total Items: 130
Early treatment of white-nose syndrome is necessary to stop population decline
Since its introduction to North America, white-nose syndrome has been associated with declines greater than 90% in several bat species, prompting the development of treatments to reduce disease-related mortality. As treatment application is scaled up, predicting responses at the population level will help in the development of management plans.We develop a model allowing for the implementation of
Authors
John Forrest Grider, Wayne E. Thogmartin, Evan H. Campbell Grant, Riley F. Bernard, Robin E. Russell
Speciation with gene flow in a narrow endemic West Virginia cave salamander (Gyrinophilus subterraneus)
Due to their limited geographic distributions and specialized ecologies, cave species are often highly endemic and can be especially vulnerable to habitat degradation within and surrounding the cave systems they inhabit. We investigated the evolutionary history of the West Virginia Spring Salamander (Gyrinophilus subterraneus), estimated the population trend from historic and current survey data,
Authors
Evan H. Campbell Grant, Kevin P. Mulder, Adrianne B. Brand, Douglas B. Chambers, Addison H. Wynn, Grace Capshaw, Matthew L. Niemiller, John G. Phillips, Jeremy F. Jacobs, Shawn R. Kuchta, Rayna C. Bell
Diverse aging rates in ectothermic tetrapods provide insights for the evolution of aging and longevity
Comparative studies of mortality in the wild are necessary to understand the evolution of aging; yet, ectothermic tetrapods are underrepresented in this comparative landscape, despite their suitability for testing evolutionary hypotheses. We present a study of aging rates and longevity across wild tetrapod ectotherms, using data from 107 populations (77 species) of nonavian reptiles and amphibians
Authors
Beth A. Reinke, Hugo Cayuela, Fredric J. Janzen, Jean-François Lemaitre, Jean-Michel Gaillard, A. Michelle Lawing, John B. Iverson, Ditte G Christiansen, Iñigo Martínez-Solano, Gregorio Sánchez-Montes, Jorge Gutiérrez-Rodríguez, Francis L Rose, Nicola J. Nelson, Susan Keall, Alain J Crivelli, Theodoros Nazirides, Annegret Grimm-Seyfarth, Klaus Henle, Emiliano Mori, Gaëtan Guiller, Rebecca Homan, Anthony Olivier, Erin L. Muths, Blake R. Hossack, Xavier Bonnet, David Pilliod, Marieke Lettink, Tony Whitaker, Benedikt R. Schmidt, Michael G. Gardner, Marc Cheylan, Françoise Poitevin, Ana Golubović, Ljiljana Tomović, Dragan Arsovski, Richard A Griffiths, Jan W. Arntzen, Jean-Pierre Baron, Jean-François Le Galliard, Thomas Tully, Luca Luiselli, Massimo Capula, Lorenzo Rugiero, Rebecca McCaffery, Lisa A Eby, Briggs-Gonzalez; Venetia, Frank Mazzotti, David M. Pearson, Brad A. Lambert, David M. Green, Nathalie Jreidini, Claudio Angelini, Graham Pyke, Jean-Marc Thirion, Pierre Joly, Jean-Paul Léna, Tony Tucker, Col Limpus, Pauline Priol, Aurélien Besnard, Pauline Bernard, Kristin Stanford, Richard S. King, Justin M Garwood, Jaime Bosch, Franco Souza, Jaime Bertoluci, Shirley Famelli, Kurt Grossenbacher, Omar Lenzi, Kathleen Matthews, Sylvain Boitaud, Deanna H. Olson, Tim Jessop, Graeme Gillspie, Jean Clobert, Murielle Richard, Andrés Valenzuela-Sánchez, Gary M. Fellers, Patrick M. Kleeman, Brian J. Halstead, Evan H. Campbell Grant, Phillip G Byrne, Thierry Frétey, Gernard Le Garff, Pauline Levionnois, John C. Maerz, Julian Pichenot, Kurtulus Olgun, Nazan Üzüm, Aziz Avcı, Claude Miaud, Johan Elmberg, Gregory P Brown, Richard Shine, Nathan F Bendik, Lisa O'Donnell, Courtney L. Davis, Michael J Lannoo, Rochelle M Stiles, Robert M Cox, Aaron M Reedy, Daniel A. Warner, Eric Bonnaire, Kristine Grayson, Roberto Ramos-Targarona, Eyup Baskale, David J. Muñoz, John Measey, F. Andre de Villiers, Will Selman, Victor Ronget, Anne M. Bronikowski, David A W Miller
Ignoring species availability biases occupancy estimates in single-scale occupancy models
Most applications of single-scale occupancy models do not differentiate between availability and detectability, even though species availability is rarely equal to one. Species availability can be estimated using multi-scale occupancy models; however, for the practical application of multi-scale occupancy models, it can be unclear what a robust sampling design looks like and what the statistical p
Authors
Graziella Vittoria Direnzo, David A. W. Miller, Evan H. Campbell Grant
Amphibian mucus triggers a developmental transition in the frog-killing chytrid fungus
The frog-killing chytrid fungus Batrachochytrium dendrobatidis (Bd) is decimating amphibian populations around the world. Bd has a biphasic life cycle, alternating between motile zoospores that disperse within aquatic environments and sessile sporangia that grow within the mucus-coated skin of amphibians. Zoospores lack cell walls and swim rapidly through aquatic environments using a posterior fla
Authors
Kristyn A. Robinson, Sarah M. Prostak, Evan H. Campbell Grant, Lillian K. Fritz-Laylin
Evaluating the risk of SARS-CoV-2 transmission to bats in the context of wildlife research, rehabilitation, and control
Preventing wildlife disease outbreaks is a priority for natural resource agencies, and management decisions can be urgent, especially in epidemic circumstances. With the emergence of SARS-CoV-2, wildlife agencies were concerned whether the activities they authorize might increase the risk of viral transmission from humans to North American bats, but had a limited amount of time in which to make de
Authors
Jonathan D. Cook, Evan H. Campbell Grant, Jeremy T. H. Coleman, Jonathan M. Sleeman, Michael C. Runge
A comparison of monitoring designs to assess wildlife community parameters across spatial scales
Dedicated long-term monitoring at appropriate spatial and temporal scales is necessary to understand biodiversity losses and develop effective conservation plans. Wildlife monitoring is often achieved by obtaining data at a combination of spatial scales, ranging from local to broad, to understand the status, trends, and drivers of individual species or whole communities and their dynamics. However
Authors
Alexander Wright, Evan H. Campbell Grant, Elise F. Zipkin
Looking ahead, guided by the past: The role of U.S. national parks in amphibian research and conservation
Protected areas like national parks are essential elements of conservation because they limit human influence on the landscape, which protects biodiversity and ecosystem function. The role of national parks in conservation, however, often goes far beyond limiting human influence. The U.S. National Park Service and its system of land units contribute substantively to conservation by providing prote
Authors
Brian J. Halstead, Andrew M. Ray, Erin L. Muths, Evan H. Campbell Grant, Rob Grasso, Michael J. Adams, Kathleen Semple Delaney, Jane Carlson, Blake R. Hossack
Summary and synthesis of 15 years of the Amphibian Vital Sign monitoring in the National Capital Region Inventory and Monitoring Network
The amphibian monitoring program, designed and conducted by the U.S. Geological Survey’s
Amphibian Research and Monitoring Initiative program, is designed to estimate the status and trends of amphibian populations to assist management decisions in individual parks and across the National Capital Region Network. Detection/non-detection data for stream and wetland habitats has been collected in 2 pa
Authors
Evan H. Campbell Grant, Adrianne Brand, AD Wright
Site- and individual-level contaminations affect infection prevalence of an emerging infectious disease of amphibians
Emerging infectious disease outbreaks are one of multiple stressors responsible for amphibian declines globally. In the northeastern United States, ranaviral diseases are prevalent in amphibians and other ectothermic species, but there is still uncertainty as to whether their presence is leading to population level effects. Further, there is also uncertainty surrounding the potential interactions
Authors
Kelly L. Smalling, Brittany A. Mosher, Luke R. Iwanowicz, Keith Loftin, Adam Boehlke, Michelle Hladik, Carly R. Muletz-Wolz, Nandadevi Córtes-Rodríguez, Robin Femmer, Evan H. Campbell Grant
By
Ecosystems Mission Area, Water Resources Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology, Eastern Ecological Science Center, California Water Science Center, Geology, Geophysics, and Geochemistry Science Center, Kansas Water Science Center, New Jersey Water Science Center
Geographic variation and thermal plasticity shape salamander metabolic rates under current and future climates
Predicted changes in global temperature are expected to increase extinction risk for ectotherms, primarily through increased metabolic rates. Higher metabolic rates generate increased maintenance energy costs which are a major component of energy budgets. Organisms often employ plastic or evolutionary (e.g., local adaptation) mechanisms to optimize metabolic rate with respect to their environment.
Authors
D. J. Munoz, D. A. W. Miller, R. Schilder, Evan H. Campbell Grant
Evaluating the effect of expert elicitation techniques on population status assessment in the face of large uncertainty
Population projection models are important tools for conservation and management. They are often used for population status assessments, for threat analyses, and to predict the consequences of conservation actions. Although conservation decisions should be informed by science, critical decisions are often made with very little information to support decision-making. Conversely, postponing decision
Authors
Jennifer F. Moore, Julien Martin, Hardin Waddle, Evan H. Campbell Grant, Jillian Elizabeth Fleming, Eve Bohnett, Thomas S.B. Akre, Donald J. Brown, Michael T. Jones, Jessica R. Meck, Kevin J. Oxenrider, Anthony Tur, Lisabeth L. Willey, Fred A Johnson