Northeast Region Photo Contest Winner | October 2018 | People
Salamander sampling crew
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
Collaborative Project to Understand Red-backed Salamander Population Dynamics and Adaptation
In 2013, the Salamander Population and Adaptation Research Network started as a partnership between researchers at Penn State University and the USGS Northeast Amphibian and Research Monitoring Initiative with the intention of creating a research network to address adaptation and population dynamics across multiple scales. Our goals are to understand impacts of land use and weather conditions on...
Monitoring Vernal Pool Amphibians in the Northeast
In 2004, the Northeast Amphibian Research Monitoring Initiative (NE ARMI) in collaboration with National Park Service and US Fish and Wildlife Service initiated a region-wide study on the distribution of vernal pools and estimate the proportion of pools that were occupied by pool-associated amphibians (specifically, wood frogs, Lithobates sylvaticus, and spotted salamanders, Ambystoma maculatum).
Assessing amphibian communities in the National Capital Region
The National Capital Region Network (NCRN) has identified amphibians as a priority taxonomic group for its Inventory and Monitoring program. Amphibian monitoring was initiated in 2005, and is currently concentrated in Antietam National Battlefield (ANTI), Catoctin Mountain Park (CATO), Chesapeake and Ohio Canal National Historical Park (CHOH), George Washington Memorial Parkway (GWMP), Harpers...
Northeast Amphibian Research and Monitoring Initiative
The U.S. Geological Survey’s Eastern Ecological Science Center is home to the Northeast Amphibian Research and Monitoring Initiative (NEARMI), one of 7 ARMI regions across the United States. NEARMI works on public lands in thirteen states from Maine to Virginia, including many National Parks and National Wildlife Refuges.
Disease Decision Analysis and Research
The Disease Decision Analysis and Research group is a multi-disciplinary team based out of the Eastern Ecological Science Center whose strengths are in ecology, decision sciences and quantitative modeling.
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 (PWRC) 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...
Pre-listing Science Support in the Northeast
We are working closely with multiple partners to provide updated information, model potential outcomes, and identify key uncertainties relevant to amphibian and reptile species proposed for listing in the northeast US. We also provide timely science to partners to assist in recovery of listed species, which may involve field research, data analysis, or decision support.
Filter Total Items: 20
Bsal Not Detected After Pet Release in Western Massachusetts Pond
These data have been collected by the United States Geological Survey’s Northeast Amphibian Research and Monitoring Initiative (USGS NEARMI) scientists. We collected these data to examine if Bsal was introduced to a site where there was a known pet release in Western, Massachusetts.
Capture records of Desmognathus salamanders in Shenandoah National Park, 2007-2013
Mark-recapture records of salamanders in the genus Desmognathus within stream habitat at Shenandoah National Park, Virginia from 2007-2013
Observed occurrence of Eastern red-spotted newts (Notophthalmus viridescens) in the Northeastern United States
This dataset includes surveys for the Eastern red-spotted newt (Notophrhalamus viridescens viridescen). The survey data includes 264 survey sites, landscape level covariates including human interference index, and landcover type, and survey level covariates including survey date and detection method.
Data to support an updated range map for Plethodon shenandoah and evaluating support for multiple models of species occurrence
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
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...
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
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.
Abiotic and biotic factors reduce viability of a high-elevation salamander in its native range
Includes data used to estimate population demographic parameters for an exemplary high-elevation amphibian species, the federally endangered Shenandoah salamander (Plethodon shenandoah). These parameters were entered into a Markov projection model which we used to forecast the future population status of the Shenandoah salamander.
Report to NECSC: Adaptive capacity in a forest indicator species
Data contain metabolic rates of red-backed salamanders (Plethodon cinereus) exposed to different thermal regimes, and the movements of salamanders marked with PIT tags and exposed to electromagnetic fields.
Data from: ''Evaluating the effect of expert elicitation techniques on population status assessment in the face of large uncertainty''
The dataset contains estimates (low, estimate, high) of 12 population parameters for the wood turtle (Glyptemys insculpta) from the literature and experts.
Field data to support speciation with gene flow in a narrow endemic West Virginia cave salamander (Gyrinophilus subterraneus)
This data set is comprised of 4 files consisting of field observations, morphological measurements, and water quality measurements relevant to a publication on the classification and population status of the WV Spring salamander, Gyrinophilius subterraneus.
An updated range map for Plethodon shenandoah
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...
Cave Salamander sampling crew
Northeast Region Photo Contest Winner | October 2018 | People
Salamander sampling crew
Filter Total Items: 142
Pan-amphibia distribution of the fungal parasite Batrachochytrium dendrobatidis varies with species and temperature
Batrachochytrium dendrobatidis (Bd) is a globally distributed fungal pathogen of amphibians that has contributed to one of the largest disease-related biodiversity losses in wildlife. Bd is regularly viewed through the lens of a global wildlife epizootic because the spread of highly virulent genetic lineages has resulted in well-documented declines and extinctions of multiple amphibian...
Authors
Daniel A. Grear, Michael J. Adams, Adam R. Backlin, William Barichivich, Adrianne Brand, Gary M. Bucciarelli, Daniel L. Calhoun, Tara Chestnut, Jon D Davenport, Andrew E Dietrich, Graziella V. DiRenzo, Robert N. Fisher, Brad Glorioso, Evan H. Campbell Grant, Brian J. Halstead, Marc P Hayes, Blake R. Hossack, Morgan Kain, Patrick M. Kleeman, Jeffrey M. Lorch, Brome McCreary, David A.W. Miller, Brittany A. Mosher, Erin L. Muths, Christopher Pearl, Charles H. Robinson, Mark Roth, Jennifer Rowe, Walter Sadinski, Brent H. Sigafus, Iga Stasiak, Samuel Sweet, Hardin Waddle, Susan Walls, Gregory J Watkins-Colwell, Lori A Williams, Megan Winzeler
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
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
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 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
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
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 Hernández-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
Epidemiological modeling of SARS-CoV-2 in white-tailed deer (Odocoileus virginianus) reveals conditions for introduction and widespread transmission
Emerging infectious diseases with zoonotic potential often have complex socioecological dynamics and limited ecological data, requiring integration of epidemiological modeling with surveillance. Although our understanding of SARS-CoV-2 has advanced considerably since its detection in late 2019, the factors influencing its introduction and transmission in wildlife hosts, particularly...
Authors
Elias Rosenblatt, Jonathan D. Cook, Graziella Vittoria DiRenzo, Evan H. Campbell Grant, Fernando Arce, Kimberly M Pepin, F. Javiera Rudolph, Michael C. Runge, Susan A. Shriner, Daniel P. Walsh, Brittany A. Mosher
Reframing wildlife disease management problems with decision analysis
Contemporary wildlife disease management is complex because managers need to respond to a wide range of stakeholders, multiple uncertainties, and difficult trade-offs that characterize the interconnected challenges of today. Despite general acknowledgment of these complexities, managing wildlife disease tends to be framed as a scientific problem, in which the major challenge is lack of...
Authors
Margaret C. McEachran, Johanna A. Harvey, Riley Olivia Mummah, Molly Bletz, Claire S. Teitelbaum, Elias Rosenblatt, F. Javiera Rudolph, Fernando Arce, Shanglai Yin, Diann Prosser, Brittany A. Mosher, Jennifer M. Mullinax, Graziella Vittoria DiRenzo, Jannelle Couret, Michael C. Runge, Evan H. Campbell Grant, Jonathan D. Cook
Updated range map of an endangered salamander and congeneric competitor reveals different niche preferences
Estimating distributions for cryptic and highly range-restricted species induces unique challenges for species distribution modeling. In particular, bioclimatic covariates that are typically used to model species ranges at regional and continental scales may not show strong variation at scales of 100s and 10s of meters. This limits both the likelihood and usefulness of correlated...
Authors
Jo Avital Werba, David A. W. Miller, Adrianne Brand, Evan H. Campbell Grant
Preparing for a Bsal invasion into North America has improved multi-sector readiness
Western palearctic salamander susceptibility to the skin disease caused by the amphibian chytrid fungus Batrachochytrium salamandrivorans (Bsal) was recognized in 2014, eliciting concerns for a potential novel wave of amphibian declines following the B. dendrobatidis (Bd) chytridiomycosis global pandemic. Although Bsal had not been detected in North America, initial experimental trials...
Authors
Deanna H. Olson, Evan H. Campbell Grant, Molly Bletz, Jonah Piovia-Scott, David Lesbarrères, Jacob L. Kerby, Michael J. Adams, Maria Florencia Breitman, Michelle R. Christman, María J. Forzán, Matthew J. Gray, Aubree J. Hill, Michelle S. Koo, Olga Milenkaya, Eria A. Rebollar, Louise A. Rollins-Smith, Megan Serr, Alex Shepak, Lenny Shirose, Laura Sprague, Jenifer Walke, Alexa Warwick, Brittany A. Mosher
Matching decision support modeling frameworks to disease emergence stages and associated management objectives
Wildlife disease management decisions often require rapid responses to situations that are fraught with uncertainty. By recognizing that management is implemented to achieve specific objectives, resource managers and science partners can identify an analysis technique and develop a monitoring plan to evaluate management effectiveness. For emerging infectious diseases, objectives may take...
Authors
Evan H. Campbell Grant, Brittany A. Mosher, Riley Bernard, Alexander Wright, Robin Russell
Code for quantitative support for the benefits of proactive management for wildlife disease control
This software release contains the input data, R scripts, and Rmarkdown visualization scripts. This includes (i) aggregation code of expert elicited parameter estimates, (ii) simulation code using our develop dynamic multi-state occupancy model for no management, proactive management, and reactive management, (iii) code for probabilistic decision trees, and (iv) Rmarkdown scripts...
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
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...
Inferring pathogen presence when sample misclassification and partial observation occur
This software contains four separate R scripts and one Matlab script that comprise an analysis to estimate the posterior probability of pathogen presence when sample misclassification and partial observations occur. We develop a Bayesian hierarchal framework that accommodates false negative, false positive, and uncertain detections and apply this framework to a case study of the fungal...
Applying Simulated Treatments to Bat Populations Experiencing Severe White-nose Syndrome Mortality
We developed a model allowing for the application of treatment strategies to bat populations at risk of severe mortality from WNS. The model allows the bat population to exist within a network of hibernacula and updates survival, reproduction, movement, treatment applications, and treatment related disturbance annually. For simplicity, the effects of WNS are experienced across all...
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
Science and Products
Filter Total Items: 20
Collaborative Project to Understand Red-backed Salamander Population Dynamics and Adaptation
In 2013, the Salamander Population and Adaptation Research Network started as a partnership between researchers at Penn State University and the USGS Northeast Amphibian and Research Monitoring Initiative with the intention of creating a research network to address adaptation and population dynamics across multiple scales. Our goals are to understand impacts of land use and weather conditions on...
Monitoring Vernal Pool Amphibians in the Northeast
In 2004, the Northeast Amphibian Research Monitoring Initiative (NE ARMI) in collaboration with National Park Service and US Fish and Wildlife Service initiated a region-wide study on the distribution of vernal pools and estimate the proportion of pools that were occupied by pool-associated amphibians (specifically, wood frogs, Lithobates sylvaticus, and spotted salamanders, Ambystoma maculatum).
Assessing amphibian communities in the National Capital Region
The National Capital Region Network (NCRN) has identified amphibians as a priority taxonomic group for its Inventory and Monitoring program. Amphibian monitoring was initiated in 2005, and is currently concentrated in Antietam National Battlefield (ANTI), Catoctin Mountain Park (CATO), Chesapeake and Ohio Canal National Historical Park (CHOH), George Washington Memorial Parkway (GWMP), Harpers...
Northeast Amphibian Research and Monitoring Initiative
The U.S. Geological Survey’s Eastern Ecological Science Center is home to the Northeast Amphibian Research and Monitoring Initiative (NEARMI), one of 7 ARMI regions across the United States. NEARMI works on public lands in thirteen states from Maine to Virginia, including many National Parks and National Wildlife Refuges.
Disease Decision Analysis and Research
The Disease Decision Analysis and Research group is a multi-disciplinary team based out of the Eastern Ecological Science Center whose strengths are in ecology, decision sciences and quantitative modeling.
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 (PWRC) 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...
Pre-listing Science Support in the Northeast
We are working closely with multiple partners to provide updated information, model potential outcomes, and identify key uncertainties relevant to amphibian and reptile species proposed for listing in the northeast US. We also provide timely science to partners to assist in recovery of listed species, which may involve field research, data analysis, or decision support.
Filter Total Items: 20
Bsal Not Detected After Pet Release in Western Massachusetts Pond
These data have been collected by the United States Geological Survey’s Northeast Amphibian Research and Monitoring Initiative (USGS NEARMI) scientists. We collected these data to examine if Bsal was introduced to a site where there was a known pet release in Western, Massachusetts.
Capture records of Desmognathus salamanders in Shenandoah National Park, 2007-2013
Mark-recapture records of salamanders in the genus Desmognathus within stream habitat at Shenandoah National Park, Virginia from 2007-2013
Observed occurrence of Eastern red-spotted newts (Notophthalmus viridescens) in the Northeastern United States
This dataset includes surveys for the Eastern red-spotted newt (Notophrhalamus viridescens viridescen). The survey data includes 264 survey sites, landscape level covariates including human interference index, and landcover type, and survey level covariates including survey date and detection method.
Data to support an updated range map for Plethodon shenandoah and evaluating support for multiple models of species occurrence
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
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...
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
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.
Abiotic and biotic factors reduce viability of a high-elevation salamander in its native range
Includes data used to estimate population demographic parameters for an exemplary high-elevation amphibian species, the federally endangered Shenandoah salamander (Plethodon shenandoah). These parameters were entered into a Markov projection model which we used to forecast the future population status of the Shenandoah salamander.
Report to NECSC: Adaptive capacity in a forest indicator species
Data contain metabolic rates of red-backed salamanders (Plethodon cinereus) exposed to different thermal regimes, and the movements of salamanders marked with PIT tags and exposed to electromagnetic fields.
Data from: ''Evaluating the effect of expert elicitation techniques on population status assessment in the face of large uncertainty''
The dataset contains estimates (low, estimate, high) of 12 population parameters for the wood turtle (Glyptemys insculpta) from the literature and experts.
Field data to support speciation with gene flow in a narrow endemic West Virginia cave salamander (Gyrinophilus subterraneus)
This data set is comprised of 4 files consisting of field observations, morphological measurements, and water quality measurements relevant to a publication on the classification and population status of the WV Spring salamander, Gyrinophilius subterraneus.
An updated range map for Plethodon shenandoah
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...
Cave Salamander sampling crew
Northeast Region Photo Contest Winner | October 2018 | People
Salamander sampling crew
Northeast Region Photo Contest Winner | October 2018 | People
Salamander sampling crew
Filter Total Items: 142
Pan-amphibia distribution of the fungal parasite Batrachochytrium dendrobatidis varies with species and temperature
Batrachochytrium dendrobatidis (Bd) is a globally distributed fungal pathogen of amphibians that has contributed to one of the largest disease-related biodiversity losses in wildlife. Bd is regularly viewed through the lens of a global wildlife epizootic because the spread of highly virulent genetic lineages has resulted in well-documented declines and extinctions of multiple amphibian...
Authors
Daniel A. Grear, Michael J. Adams, Adam R. Backlin, William Barichivich, Adrianne Brand, Gary M. Bucciarelli, Daniel L. Calhoun, Tara Chestnut, Jon D Davenport, Andrew E Dietrich, Graziella V. DiRenzo, Robert N. Fisher, Brad Glorioso, Evan H. Campbell Grant, Brian J. Halstead, Marc P Hayes, Blake R. Hossack, Morgan Kain, Patrick M. Kleeman, Jeffrey M. Lorch, Brome McCreary, David A.W. Miller, Brittany A. Mosher, Erin L. Muths, Christopher Pearl, Charles H. Robinson, Mark Roth, Jennifer Rowe, Walter Sadinski, Brent H. Sigafus, Iga Stasiak, Samuel Sweet, Hardin Waddle, Susan Walls, Gregory J Watkins-Colwell, Lori A Williams, Megan Winzeler
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
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
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 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
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
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 Hernández-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
Epidemiological modeling of SARS-CoV-2 in white-tailed deer (Odocoileus virginianus) reveals conditions for introduction and widespread transmission
Emerging infectious diseases with zoonotic potential often have complex socioecological dynamics and limited ecological data, requiring integration of epidemiological modeling with surveillance. Although our understanding of SARS-CoV-2 has advanced considerably since its detection in late 2019, the factors influencing its introduction and transmission in wildlife hosts, particularly...
Authors
Elias Rosenblatt, Jonathan D. Cook, Graziella Vittoria DiRenzo, Evan H. Campbell Grant, Fernando Arce, Kimberly M Pepin, F. Javiera Rudolph, Michael C. Runge, Susan A. Shriner, Daniel P. Walsh, Brittany A. Mosher
Reframing wildlife disease management problems with decision analysis
Contemporary wildlife disease management is complex because managers need to respond to a wide range of stakeholders, multiple uncertainties, and difficult trade-offs that characterize the interconnected challenges of today. Despite general acknowledgment of these complexities, managing wildlife disease tends to be framed as a scientific problem, in which the major challenge is lack of...
Authors
Margaret C. McEachran, Johanna A. Harvey, Riley Olivia Mummah, Molly Bletz, Claire S. Teitelbaum, Elias Rosenblatt, F. Javiera Rudolph, Fernando Arce, Shanglai Yin, Diann Prosser, Brittany A. Mosher, Jennifer M. Mullinax, Graziella Vittoria DiRenzo, Jannelle Couret, Michael C. Runge, Evan H. Campbell Grant, Jonathan D. Cook
Updated range map of an endangered salamander and congeneric competitor reveals different niche preferences
Estimating distributions for cryptic and highly range-restricted species induces unique challenges for species distribution modeling. In particular, bioclimatic covariates that are typically used to model species ranges at regional and continental scales may not show strong variation at scales of 100s and 10s of meters. This limits both the likelihood and usefulness of correlated...
Authors
Jo Avital Werba, David A. W. Miller, Adrianne Brand, Evan H. Campbell Grant
Preparing for a Bsal invasion into North America has improved multi-sector readiness
Western palearctic salamander susceptibility to the skin disease caused by the amphibian chytrid fungus Batrachochytrium salamandrivorans (Bsal) was recognized in 2014, eliciting concerns for a potential novel wave of amphibian declines following the B. dendrobatidis (Bd) chytridiomycosis global pandemic. Although Bsal had not been detected in North America, initial experimental trials...
Authors
Deanna H. Olson, Evan H. Campbell Grant, Molly Bletz, Jonah Piovia-Scott, David Lesbarrères, Jacob L. Kerby, Michael J. Adams, Maria Florencia Breitman, Michelle R. Christman, María J. Forzán, Matthew J. Gray, Aubree J. Hill, Michelle S. Koo, Olga Milenkaya, Eria A. Rebollar, Louise A. Rollins-Smith, Megan Serr, Alex Shepak, Lenny Shirose, Laura Sprague, Jenifer Walke, Alexa Warwick, Brittany A. Mosher
Matching decision support modeling frameworks to disease emergence stages and associated management objectives
Wildlife disease management decisions often require rapid responses to situations that are fraught with uncertainty. By recognizing that management is implemented to achieve specific objectives, resource managers and science partners can identify an analysis technique and develop a monitoring plan to evaluate management effectiveness. For emerging infectious diseases, objectives may take...
Authors
Evan H. Campbell Grant, Brittany A. Mosher, Riley Bernard, Alexander Wright, Robin Russell
Code for quantitative support for the benefits of proactive management for wildlife disease control
This software release contains the input data, R scripts, and Rmarkdown visualization scripts. This includes (i) aggregation code of expert elicited parameter estimates, (ii) simulation code using our develop dynamic multi-state occupancy model for no management, proactive management, and reactive management, (iii) code for probabilistic decision trees, and (iv) Rmarkdown scripts...
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
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...
Inferring pathogen presence when sample misclassification and partial observation occur
This software contains four separate R scripts and one Matlab script that comprise an analysis to estimate the posterior probability of pathogen presence when sample misclassification and partial observations occur. We develop a Bayesian hierarchal framework that accommodates false negative, false positive, and uncertain detections and apply this framework to a case study of the fungal...
Applying Simulated Treatments to Bat Populations Experiencing Severe White-nose Syndrome Mortality
We developed a model allowing for the application of treatment strategies to bat populations at risk of severe mortality from WNS. The model allows the bat population to exist within a network of hibernacula and updates survival, reproduction, movement, treatment applications, and treatment related disturbance annually. For simplicity, the effects of WNS are experienced across all...
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