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
Science and Products
Filter Total Items: 21
COVID-19 Pathways and Wildlife Dynamics
Below are the USGS 2020 Coronavirus Aid, Relief and Economic Security Act (CARES Act) research projects related to COVID-19 pathways and wildlife dynamics. Select tabs above for related items.
Decision Science Support for SARS-CoV-2 Risk to North American Bats
The Eastern Ecological Science Center is working closely with federal, state, and tribal partners to help inform decisions that reduce the risk of SARS-CoV-2 transmission from humans to North American wildlife, including bats.
Decision science support for Chronic Wasting Disease
Eastern Ecological Science Center adds the decision analytical skill set to the existing body of USGS expertise on Chronic Wasting Disease (CWD), in support of our sister DOI agencies.
Vernal Pool Inundation Models
This website provides an application for exploring modeling results from a U.S. Geological Survey (USGS) project titled Mapping Climate Change Resistant Vernal Pools in the Northeastern U.S. The purpose of this project was to improve understanding of the factors that control inundation patterns in vernal pools of the northeastern United States, so as to identify pools that might function as...
Modeling the response of cave hibernating Myotis species to white-nose syndrome mitigation tactics
Bat Research Research collaboration: Robin Russell (NWHC), Tonie Rocke (NWHC), Wayne Thogmartin (UMESC), Evan Grant (EESC) White-nose syndrome is a fungal disease devastating cave-hibernating bat species ( Myotis spp.) in the eastern United States. Several mitigation tactics have been proposed to alleviate the effects of white-nose syndrome on bats including probiotics and vaccination. Questions...
A generic web application to visualize and understand movements of tagged animals
The goal of this project was to maximize the value of expensive animal tagging data. We developed an interactive web application to help scientists understand patterns in their own tagging datasets and to help scientists, funders and agencies communicate tagging data to decision-makers and to the general public. Interactive visualizations have emerged recently as a valuable tool for...
Filter Total Items: 28
Data to support an updated range map for Plethodon shenandoah and evaluating support for multiple models of species occurrence (ver. 2.0, August 2025) Data to support an updated range map for Plethodon shenandoah and evaluating support for multiple models of species occurrence (ver. 2.0, August 2025)
The Shenanadoah Salamander (Plethodon shenandoah) is an endangered salamander found only in the mountains of Shenandoah National Park. Field surveys of the salamander were conducted from 2007-2022 using daytime cover object surveys. In order to capture the totality of P. shendandoah’s range we sampled from low to high elevation across a broad geographic range. We created a spatial...
Range-wide salamander densities reveal a key component of terrestrial vertebrate biomass in eastern North American forests Range-wide salamander densities reveal a key component of terrestrial vertebrate biomass in eastern North American forests
These data have been collected by a collaborative and coordinated research network, SPARCnet (Salamander Population and Adaptation Research Collaboration network). We collected these data to examine patterns in seasonal and latitudinal variation in population density. This data can be used to estimate local salamander biomass, correcting for imperfect detection, and then compare these to...
Code for: Small enzootic survival costs mask the potential for long-term population size suppression Code for: Small enzootic survival costs mask the potential for long-term population size suppression
This repository contains all of the scripts to reproduce the analyses, figures, and tables associated with the manuscript Glorioso et al. in review. The scripts are organized into folders, and the folders are numbered in the order in which they should be executed. Briefly, there are six folders that do the following: (1) format the data, (2) fit the model, (3) run the population...
whitetailedSIRS: A package to project SARS-CoV-2 outbreak dynamics in white-tailed deer whitetailedSIRS: A package to project SARS-CoV-2 outbreak dynamics in white-tailed deer
This software release contains several R scripts that generate epidemic projections of SARS-CoV-2 in white tailed deer populations using a Susceptible-Infected-Recovered-Susceptible (SIRS) modeling framework. We provide a workflow of vignettes used in Rosenblatt et al. In Prep and Cook et al. In Prep. Users are able to specify transmission parameters for human-deer and deer-deer...
Mercury concentrations in amphibian tissues across the United States, 2016-2021 Mercury concentrations in amphibian tissues across the United States, 2016-2021
Comma-separated values (.csv) file containing data related to amphibian sampling across the United States between 2016 and 2021. Data files contain mercury concentrations in amphibian and dragonfly tissues, mercury concentrations in sediment, as well as amphibian morphometrics, and habitat and climate characteristics where the samples were collected.
Long-term effects of timber harvest on vernal pool availability and occupancy of two obligate amphibians Long-term effects of timber harvest on vernal pool availability and occupancy of two obligate amphibians
This data set is comprised of 3 files of information collected on amphibians and vernal pool habitats at Canaan Valley National Wildlife Refuge from 2004 - 2016.
Filter Total Items: 148
Enhancing One Health outcomes using decision science and negotiation Enhancing One Health outcomes using decision science and negotiation
One Health initiatives have advanced zoonotic disease management by recognizing the interconnectedness of three sectors of governance (human, ecosystem, and animal) and by identifying options that can improve full-system health. Although One Health has had many successes, its full realization may be inhibited by a lack of strategies to overcome simultaneous impediments in decision making...
Authors
Jonathan D. Cook, Evan H. Campbell Grant, Howard S. Ginsberg, Diann Prosser, Michael C. Runge
Reducing uncertainty with iterative model updating parses effects of competition and environment on salamander occupancy Reducing uncertainty with iterative model updating parses effects of competition and environment on salamander occupancy
Making timely management decisions is often hindered by uncertainty. Monitoring reduces two key types of uncertainty. First, it serves to reduce structural uncertainty of how the system works and provides support for expectations of how a system works. Second, it serves to reduce parametric uncertainty of the drivers of system dynamics. By combining monitoring data and quantitative...
Authors
Jo Avital Werba, Graziella Vittoria DiRenzo, Adrianne Brand, Evan H. Campbell Grant
Predicted occurrence of Eastern Newts (Notophthalmus viridescens viridescens) across the northeastern United States Predicted occurrence of Eastern Newts (Notophthalmus viridescens viridescens) across the northeastern United States
Effective conservation is becoming more difficult as threats to wildlife increase. Natural resource managers are pressured to make difficult decisions with limited resources, and in many instances, large uncertainty. Scientists and managers tasked with the conservation of a species need tools to help guide efficient decision-making. Often, information for management decisions is...
Authors
Lindsey Pekurny, Evan H. Campbell Grant, Brittany A. Mosher
One Health collaboration is more effective than single-sector actions at mitigating SARS-CoV-2 in deer One Health collaboration is more effective than single-sector actions at mitigating SARS-CoV-2 in deer
One Health aims to achieve optimal health outcomes for people, animals, plants, and shared environments. We describe a multisector effort to understand and mitigate SARS-CoV-2 transmission risk to humans via the spread among and between captive and wild white-tailed deer. We first framed a One Health problem with three governance sectors that manage captive deer, wild deer populations...
Authors
Jonathan D. Cook, Elias Rosenblatt, Graziella Vittoria DiRenzo, Evan H. Campbell Grant, Brittany A. Mosher, Fernando Arce, Sonja Christensen, Ria R. Ghai, Michael C. Runge
Quantitative support for the benefits of proactive management for wildlife disease control Quantitative support for the benefits of proactive management for wildlife disease control
Finding effective pathogen mitigation strategies is one of the biggest challenges humans face today. In the context of wildlife, emerging infectious diseases have repeatedly caused widespread host morbidity and population declines of numerous taxa. In areas yet unaffected by a pathogen, a proactive management approach has the potential to minimize or prevent host mortality. However...
Authors
Molly Bletz, Evan H. Campbell Grant, Graziella Vittoria DiRenzo
Range-wide salamander densities reveal a key component of terrestrial vertebrate biomass in eastern North American forests Range-wide salamander densities reveal a key component of terrestrial vertebrate biomass in eastern North American forests
Characterizing the population density of species is a central interest in ecology. Eastern North America is the global hotspot for biodiversity of plethodontid salamanders, an inconspicuous component of terrestrial vertebrate communities, and among the most widespread is the eastern red-backed salamander, Plethodon cinereus. Previous work suggests population densities are high with...
Authors
Evan H. Campbell Grant, Jillian Elizabeth Fleming, Elizabeth Bastiaans, Adrianne Brand, Jacey Brooks, Catherine Devlin, Kristen Epp, Matt Evans, M. Caitlin Fisher-Reid, Brian Gratwicke, Kristine Grayson, Natalie Haydt, Raisa Hernandez-Pacheco, Daniel J. Hocking, Amanda Hyde, Michael Losito, Maisie MacKnight, Tanya Matlaga, Louise Mead, David J. Munoz, William B. Peterman, Veronica Puza, Charles Shafer, Sean Sterrett, Chris Sutherland, Lily M. Thompson, Alexa R. Warwick, Alexander D. Wright, Kerry Yurewicz, David A. W. Miller
Decision-Support Tool to Estimate SARS-CoV-2 Human-to-bat Transmission Risk Decision-Support Tool to Estimate SARS-CoV-2 Human-to-bat Transmission Risk
Source code to run Shiny app of North American bat SARS2 risk model during winter fieldwork
Filter Total Items: 15
Science and Products
Filter Total Items: 21
COVID-19 Pathways and Wildlife Dynamics
Below are the USGS 2020 Coronavirus Aid, Relief and Economic Security Act (CARES Act) research projects related to COVID-19 pathways and wildlife dynamics. Select tabs above for related items.
Decision Science Support for SARS-CoV-2 Risk to North American Bats
The Eastern Ecological Science Center is working closely with federal, state, and tribal partners to help inform decisions that reduce the risk of SARS-CoV-2 transmission from humans to North American wildlife, including bats.
Decision science support for Chronic Wasting Disease
Eastern Ecological Science Center adds the decision analytical skill set to the existing body of USGS expertise on Chronic Wasting Disease (CWD), in support of our sister DOI agencies.
Vernal Pool Inundation Models
This website provides an application for exploring modeling results from a U.S. Geological Survey (USGS) project titled Mapping Climate Change Resistant Vernal Pools in the Northeastern U.S. The purpose of this project was to improve understanding of the factors that control inundation patterns in vernal pools of the northeastern United States, so as to identify pools that might function as...
Modeling the response of cave hibernating Myotis species to white-nose syndrome mitigation tactics
Bat Research Research collaboration: Robin Russell (NWHC), Tonie Rocke (NWHC), Wayne Thogmartin (UMESC), Evan Grant (EESC) White-nose syndrome is a fungal disease devastating cave-hibernating bat species ( Myotis spp.) in the eastern United States. Several mitigation tactics have been proposed to alleviate the effects of white-nose syndrome on bats including probiotics and vaccination. Questions...
A generic web application to visualize and understand movements of tagged animals
The goal of this project was to maximize the value of expensive animal tagging data. We developed an interactive web application to help scientists understand patterns in their own tagging datasets and to help scientists, funders and agencies communicate tagging data to decision-makers and to the general public. Interactive visualizations have emerged recently as a valuable tool for...
Filter Total Items: 28
Data to support an updated range map for Plethodon shenandoah and evaluating support for multiple models of species occurrence (ver. 2.0, August 2025) Data to support an updated range map for Plethodon shenandoah and evaluating support for multiple models of species occurrence (ver. 2.0, August 2025)
The Shenanadoah Salamander (Plethodon shenandoah) is an endangered salamander found only in the mountains of Shenandoah National Park. Field surveys of the salamander were conducted from 2007-2022 using daytime cover object surveys. In order to capture the totality of P. shendandoah’s range we sampled from low to high elevation across a broad geographic range. We created a spatial...
Range-wide salamander densities reveal a key component of terrestrial vertebrate biomass in eastern North American forests Range-wide salamander densities reveal a key component of terrestrial vertebrate biomass in eastern North American forests
These data have been collected by a collaborative and coordinated research network, SPARCnet (Salamander Population and Adaptation Research Collaboration network). We collected these data to examine patterns in seasonal and latitudinal variation in population density. This data can be used to estimate local salamander biomass, correcting for imperfect detection, and then compare these to...
Code for: Small enzootic survival costs mask the potential for long-term population size suppression Code for: Small enzootic survival costs mask the potential for long-term population size suppression
This repository contains all of the scripts to reproduce the analyses, figures, and tables associated with the manuscript Glorioso et al. in review. The scripts are organized into folders, and the folders are numbered in the order in which they should be executed. Briefly, there are six folders that do the following: (1) format the data, (2) fit the model, (3) run the population...
whitetailedSIRS: A package to project SARS-CoV-2 outbreak dynamics in white-tailed deer whitetailedSIRS: A package to project SARS-CoV-2 outbreak dynamics in white-tailed deer
This software release contains several R scripts that generate epidemic projections of SARS-CoV-2 in white tailed deer populations using a Susceptible-Infected-Recovered-Susceptible (SIRS) modeling framework. We provide a workflow of vignettes used in Rosenblatt et al. In Prep and Cook et al. In Prep. Users are able to specify transmission parameters for human-deer and deer-deer...
Mercury concentrations in amphibian tissues across the United States, 2016-2021 Mercury concentrations in amphibian tissues across the United States, 2016-2021
Comma-separated values (.csv) file containing data related to amphibian sampling across the United States between 2016 and 2021. Data files contain mercury concentrations in amphibian and dragonfly tissues, mercury concentrations in sediment, as well as amphibian morphometrics, and habitat and climate characteristics where the samples were collected.
Long-term effects of timber harvest on vernal pool availability and occupancy of two obligate amphibians Long-term effects of timber harvest on vernal pool availability and occupancy of two obligate amphibians
This data set is comprised of 3 files of information collected on amphibians and vernal pool habitats at Canaan Valley National Wildlife Refuge from 2004 - 2016.
Filter Total Items: 148
Enhancing One Health outcomes using decision science and negotiation Enhancing One Health outcomes using decision science and negotiation
One Health initiatives have advanced zoonotic disease management by recognizing the interconnectedness of three sectors of governance (human, ecosystem, and animal) and by identifying options that can improve full-system health. Although One Health has had many successes, its full realization may be inhibited by a lack of strategies to overcome simultaneous impediments in decision making...
Authors
Jonathan D. Cook, Evan H. Campbell Grant, Howard S. Ginsberg, Diann Prosser, Michael C. Runge
Reducing uncertainty with iterative model updating parses effects of competition and environment on salamander occupancy Reducing uncertainty with iterative model updating parses effects of competition and environment on salamander occupancy
Making timely management decisions is often hindered by uncertainty. Monitoring reduces two key types of uncertainty. First, it serves to reduce structural uncertainty of how the system works and provides support for expectations of how a system works. Second, it serves to reduce parametric uncertainty of the drivers of system dynamics. By combining monitoring data and quantitative...
Authors
Jo Avital Werba, Graziella Vittoria DiRenzo, Adrianne Brand, Evan H. Campbell Grant
Predicted occurrence of Eastern Newts (Notophthalmus viridescens viridescens) across the northeastern United States Predicted occurrence of Eastern Newts (Notophthalmus viridescens viridescens) across the northeastern United States
Effective conservation is becoming more difficult as threats to wildlife increase. Natural resource managers are pressured to make difficult decisions with limited resources, and in many instances, large uncertainty. Scientists and managers tasked with the conservation of a species need tools to help guide efficient decision-making. Often, information for management decisions is...
Authors
Lindsey Pekurny, Evan H. Campbell Grant, Brittany A. Mosher
One Health collaboration is more effective than single-sector actions at mitigating SARS-CoV-2 in deer One Health collaboration is more effective than single-sector actions at mitigating SARS-CoV-2 in deer
One Health aims to achieve optimal health outcomes for people, animals, plants, and shared environments. We describe a multisector effort to understand and mitigate SARS-CoV-2 transmission risk to humans via the spread among and between captive and wild white-tailed deer. We first framed a One Health problem with three governance sectors that manage captive deer, wild deer populations...
Authors
Jonathan D. Cook, Elias Rosenblatt, Graziella Vittoria DiRenzo, Evan H. Campbell Grant, Brittany A. Mosher, Fernando Arce, Sonja Christensen, Ria R. Ghai, Michael C. Runge
Quantitative support for the benefits of proactive management for wildlife disease control Quantitative support for the benefits of proactive management for wildlife disease control
Finding effective pathogen mitigation strategies is one of the biggest challenges humans face today. In the context of wildlife, emerging infectious diseases have repeatedly caused widespread host morbidity and population declines of numerous taxa. In areas yet unaffected by a pathogen, a proactive management approach has the potential to minimize or prevent host mortality. However...
Authors
Molly Bletz, Evan H. Campbell Grant, Graziella Vittoria DiRenzo
Range-wide salamander densities reveal a key component of terrestrial vertebrate biomass in eastern North American forests Range-wide salamander densities reveal a key component of terrestrial vertebrate biomass in eastern North American forests
Characterizing the population density of species is a central interest in ecology. Eastern North America is the global hotspot for biodiversity of plethodontid salamanders, an inconspicuous component of terrestrial vertebrate communities, and among the most widespread is the eastern red-backed salamander, Plethodon cinereus. Previous work suggests population densities are high with...
Authors
Evan H. Campbell Grant, Jillian Elizabeth Fleming, Elizabeth Bastiaans, Adrianne Brand, Jacey Brooks, Catherine Devlin, Kristen Epp, Matt Evans, M. Caitlin Fisher-Reid, Brian Gratwicke, Kristine Grayson, Natalie Haydt, Raisa Hernandez-Pacheco, Daniel J. Hocking, Amanda Hyde, Michael Losito, Maisie MacKnight, Tanya Matlaga, Louise Mead, David J. Munoz, William B. Peterman, Veronica Puza, Charles Shafer, Sean Sterrett, Chris Sutherland, Lily M. Thompson, Alexa R. Warwick, Alexander D. Wright, Kerry Yurewicz, David A. W. Miller
Decision-Support Tool to Estimate SARS-CoV-2 Human-to-bat Transmission Risk Decision-Support Tool to Estimate SARS-CoV-2 Human-to-bat Transmission Risk
Source code to run Shiny app of North American bat SARS2 risk model during winter fieldwork
Filter Total Items: 15