Hardin Waddle, Ph.D.
Hardin Waddle currently works as a research ecologist for the USGS, where he serves as the principal investigator for the south-central region of the Amphibian Research and Monitoring Initiative (ARMI). His research interests include population ecology and conservation of amphibians and reptiles, primarily in the wetlands and swamps of the southeastern United States.
EDUCATION
Ph.D., Wildlife Ecology, University of Florida, 2006
M.S. Biology, Florida International University, 2000
B.S., Wildlife Science, Auburn University, 1996
Science and Products
Filter Total Items: 19
Monitoring and Removal of Invasive Cuban Treefrogs (Osteopilus septentrionalis) on the Gulf Coast
WARC researchers are performing visual encounter surveys and passively capturing Cuban treefrogs to remove as many of the invasive anurans as possible.
Prevalence Rates of Snake Fungal Disease and Its Population-level Impacts in a Snake Assemblage in Southwest Louisiana
WARC researchers used visual encounter surveys to determine prevalence rates of snake fungal disease in south-central Louisiana.
Effects of Saltwater Intrusion on Anuran Occupancy in Big Thicket National Preserve, Texas
WARC researchers sampled anuran populations at sites within Big Thicket National Preserve to explore saltwater intrusion on these populations.
Acoustic Monitoring for Two Rare Frog Species in Northwest Louisiana
WARC researchers are using automated recording units to monitor southern crawfish frogs and Strecker's chorus frogs in Louisiana.
Amphibian Research and Occupancy Modeling in the South-Central Region of the Amphibian Research and Monitoring Initiative (ARMI)
In response to growing public concerns about this loss of biodiversity, the U.S. Congress funded the Amphibian Research and Monitoring Initiative (ARMI), a national program coordinated by the U.S. Geological Survey.
Interaction of Environmental Stressors and Batrachochytrium dendrobatidis (Bd) Pathogen Loads on Survival of Green Frogs (Lithobates clamitans)
The U.S. Geological Survey Amphibian Research Monitoring Initiative (ARMI) is using a combination of swabbing, non-lethal tissue sampling, soil and water sampling, and collection of a variety of other environmental variables to determine the relationships between the prevalence and pathogen load of Bd infection and environmental stressors on green treefrog survival.
Filter Total Items: 27
Data from time-constrained visual encounter surveys and acoustic surveys for amphibians and reptiles in the Atchafalaya Basin conducted from 2008 through 2016 Data from time-constrained visual encounter surveys and acoustic surveys for amphibians and reptiles in the Atchafalaya Basin conducted from 2008 through 2016
This dataset contains data from time-constrained visual encounter surveys conducted in the Atchafalaya River Basin in South Central Louisiana from February 2008 through July 2016. In addition, it contains vocalization data collected concurrently with the visual encounter surveys and data on presence of tadpoles and larvae. All participants in surveys are included in the dataset...
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...
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.
Carbon and nitrogen isotopic values from three omnivorous turtles, vegetation, and potential prey resources in the Santa Fe River, Florida sampled 2019-2020 Carbon and nitrogen isotopic values from three omnivorous turtles, vegetation, and potential prey resources in the Santa Fe River, Florida sampled 2019-2020
All samples were collected within a 9km stretch of the Santa Fe River in northern Florida, USA. In 2019 and 2020 we sampled claw tissue from Macrochelys suwanniensis, Chelydra serpentina, and Trachemys scripta scripta, from three different sampling locations. We collected Vegetation and potential prey tissue samples within close proximity of turtle captures from two of the three capture...
Data for analysis of open removal models with temporary emigration and population dynamics to inform invasive animal management Data for analysis of open removal models with temporary emigration and population dynamics to inform invasive animal management
This data release includes the data and computer code that we produced to fit two open-robust design removal models developed to simultaneously model population dynamics, temporary emigration, and imperfect detection: a random walk linear trend model (estimable without ancillary information), and a 2-age class integrated population model (IPM) that used prior information for age...
Data from a 2019 occupancy survey of alligator snapping turtles, Macrochelys temminckii, in south-central Louisiana Data from a 2019 occupancy survey of alligator snapping turtles, Macrochelys temminckii, in south-central Louisiana
This dataset contains data on trapping methodology, turtle captures, and environmental variables from a trapping effort targeting alligator snapping turtles (Macrochelys temminckii) in south-central Louisiana in 2019.
Filter Total Items: 76
Piping Plover home ranges do not appear to be impacted by restoration of barrier islands and headlands Piping Plover home ranges do not appear to be impacted by restoration of barrier islands and headlands
Restoration of barrier island and headland habitats can alter existing and create new habitats, which may impact wildlife occupying these areas such as the threatened Piping Plover (Charadrius melodus). We used resight data from banded birds to develop minimum convex polygon (MCP) and kernel density estimates (KDE) of individual Piping Plover home ranges to investigate whether changes in...
Authors
Theodore Zenzal, Amanda Anderson, Delaina LeBlanc, Robert C. Dobbs, Brock Geary, Hardin Waddle
Pan-amphibia distribution of the fungal parasite Batrachochytrium dendrobatidis varies with species and temperature 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 Grear, Michael Adams, Adam Backlin, William Barichivich, Adrianne Brand, Gary Bucciarelli, Daniel Calhoun, Tara Chestnut, Jon Davenport, Andrew E Dietrich, Graziella DiRenzo, Robert N. Fisher, Brad Glorioso, Evan Campbell Grant, Brian J. Halstead, Marc Hayes, Blake R. Hossack, Morgan Kain, Patrick 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 Watkins-Colwell, Lori Williams, Megan Winzeler
Vertebrates in trade that pose high invasion risk to the United States Vertebrates in trade that pose high invasion risk to the United States
The United States imports thousands of live vertebrate species annually as part of legal trade. Escapes and releases from captivity are major pathways of invasion, however, the risk posed by the thousands of imported vertebrate species has not been systematically assessed. We conducted a horizon scan that used a data-driven climate match to filter a list of nearly 15,000 taxa drawn from...
Authors
Wesley Daniel, Helen Sofaer, Catherine Jarnevich, Richard Erickson, Brett DeGregorio, Peder Scott Engelstad, Jonathan A. Freedman, Susan Canavan, Emily M. Dean, Michael J Adams, Charmayne L. Anderson, Mindy Barnett, Marybeth Brey, Kyle J. Brumm, Matthew S. Bunting, Emily Caffrey, Laura Cardador, Jacoby Carter, Phillip Cassey, Duane Chapman, Natalie Claunch, Timothy D. Counihan, Kristin P. Davis, Anant Deshwal, Andrew K. Douglas, Corey Dunn, Chase Ehlo, Katie Everett, Jason M. Gleditsch, Andrew Grosse, Zoey Hendrickson, Steven Hess, Jeffrey Hill, Nick Holmes, Ana Longo, Julie Lockwood, Doran M. Mason, Ashley McDonald, Matthew Neilson, Kristen Reaver, Robert Reed, Caleb Roberts, Jane Rogosch, Christina Romagosa, James Russell, Annie Simpson, Scott Smith, Jinelle Sperry, Quenton Tuckett, Kurt VerCauteren, J. Hardin Waddle, Christian Wanamaker, John Willson, Arden Williams, Deah Lieurance
Using camera traps to estimate site occupancy of invasive Argentine Black and White Tegus (Salvator merianae) in South Florida Using camera traps to estimate site occupancy of invasive Argentine Black and White Tegus (Salvator merianae) in South Florida
The introduction of nonnative species is a leading cause of biodiversity loss. Many invasive species are cryptic or elusive in nature and therefore often evade detection, complicating their management. Occupancy modeling can reveal the presence and spread of invasive species over time and therefore has important management implications. Camera traps can be used to estimate occupancy, or...
Authors
Samantha N. Smith, Melissa Miller, Hardin Waddle, Sarah Cooke, Amy Yackel Adams, Andrea Currylow, Kevin Donmoyer, Frank J. Mazzotti
Amphibian monitoring in hardwood forests: Optimizing methods for contaminant‐based compensatory restorations Amphibian monitoring in hardwood forests: Optimizing methods for contaminant‐based compensatory restorations
Amphibians such as frogs, toads, and salamanders provide important services in aquatic and terrestrial ecosystems and have been proposed as useful indicators of progress and success for ecological restoration projects. Limited guidance is available, however, on the costs and benefits of different amphibian monitoring techniques that might be applied to sites restored in compensation for
Authors
Bethany Kunz, Hardin Waddle, Nicholas S. Green
Accounting for multiple uncertainties in a decision-support population viability assessment Accounting for multiple uncertainties in a decision-support population viability assessment
Conservation and management decisions often must be made on strict timelines, based on the “best available information” regarding a species’ current and expected future status. Simulation models are valuable tools for predicting a species’ future status but must incorporate multiple types of uncertainty in order to provide a complete understanding of plausible outcomes. Here we present a
Authors
Erica M. Christensen, Abigail Lawson, E. Rivenbark, P.K. London, D. Castellanos, J.C. Culbertson, S.M. DeMay, C. Eakin, L.S. Pearson, K. Soileau, J. Waddle, Conor P. McGowan
Science and Products
Filter Total Items: 19
Monitoring and Removal of Invasive Cuban Treefrogs (Osteopilus septentrionalis) on the Gulf Coast
WARC researchers are performing visual encounter surveys and passively capturing Cuban treefrogs to remove as many of the invasive anurans as possible.
Prevalence Rates of Snake Fungal Disease and Its Population-level Impacts in a Snake Assemblage in Southwest Louisiana
WARC researchers used visual encounter surveys to determine prevalence rates of snake fungal disease in south-central Louisiana.
Effects of Saltwater Intrusion on Anuran Occupancy in Big Thicket National Preserve, Texas
WARC researchers sampled anuran populations at sites within Big Thicket National Preserve to explore saltwater intrusion on these populations.
Acoustic Monitoring for Two Rare Frog Species in Northwest Louisiana
WARC researchers are using automated recording units to monitor southern crawfish frogs and Strecker's chorus frogs in Louisiana.
Amphibian Research and Occupancy Modeling in the South-Central Region of the Amphibian Research and Monitoring Initiative (ARMI)
In response to growing public concerns about this loss of biodiversity, the U.S. Congress funded the Amphibian Research and Monitoring Initiative (ARMI), a national program coordinated by the U.S. Geological Survey.
Interaction of Environmental Stressors and Batrachochytrium dendrobatidis (Bd) Pathogen Loads on Survival of Green Frogs (Lithobates clamitans)
The U.S. Geological Survey Amphibian Research Monitoring Initiative (ARMI) is using a combination of swabbing, non-lethal tissue sampling, soil and water sampling, and collection of a variety of other environmental variables to determine the relationships between the prevalence and pathogen load of Bd infection and environmental stressors on green treefrog survival.
Filter Total Items: 27
Data from time-constrained visual encounter surveys and acoustic surveys for amphibians and reptiles in the Atchafalaya Basin conducted from 2008 through 2016 Data from time-constrained visual encounter surveys and acoustic surveys for amphibians and reptiles in the Atchafalaya Basin conducted from 2008 through 2016
This dataset contains data from time-constrained visual encounter surveys conducted in the Atchafalaya River Basin in South Central Louisiana from February 2008 through July 2016. In addition, it contains vocalization data collected concurrently with the visual encounter surveys and data on presence of tadpoles and larvae. All participants in surveys are included in the dataset...
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...
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.
Carbon and nitrogen isotopic values from three omnivorous turtles, vegetation, and potential prey resources in the Santa Fe River, Florida sampled 2019-2020 Carbon and nitrogen isotopic values from three omnivorous turtles, vegetation, and potential prey resources in the Santa Fe River, Florida sampled 2019-2020
All samples were collected within a 9km stretch of the Santa Fe River in northern Florida, USA. In 2019 and 2020 we sampled claw tissue from Macrochelys suwanniensis, Chelydra serpentina, and Trachemys scripta scripta, from three different sampling locations. We collected Vegetation and potential prey tissue samples within close proximity of turtle captures from two of the three capture...
Data for analysis of open removal models with temporary emigration and population dynamics to inform invasive animal management Data for analysis of open removal models with temporary emigration and population dynamics to inform invasive animal management
This data release includes the data and computer code that we produced to fit two open-robust design removal models developed to simultaneously model population dynamics, temporary emigration, and imperfect detection: a random walk linear trend model (estimable without ancillary information), and a 2-age class integrated population model (IPM) that used prior information for age...
Data from a 2019 occupancy survey of alligator snapping turtles, Macrochelys temminckii, in south-central Louisiana Data from a 2019 occupancy survey of alligator snapping turtles, Macrochelys temminckii, in south-central Louisiana
This dataset contains data on trapping methodology, turtle captures, and environmental variables from a trapping effort targeting alligator snapping turtles (Macrochelys temminckii) in south-central Louisiana in 2019.
Filter Total Items: 76
Piping Plover home ranges do not appear to be impacted by restoration of barrier islands and headlands Piping Plover home ranges do not appear to be impacted by restoration of barrier islands and headlands
Restoration of barrier island and headland habitats can alter existing and create new habitats, which may impact wildlife occupying these areas such as the threatened Piping Plover (Charadrius melodus). We used resight data from banded birds to develop minimum convex polygon (MCP) and kernel density estimates (KDE) of individual Piping Plover home ranges to investigate whether changes in...
Authors
Theodore Zenzal, Amanda Anderson, Delaina LeBlanc, Robert C. Dobbs, Brock Geary, Hardin Waddle
Pan-amphibia distribution of the fungal parasite Batrachochytrium dendrobatidis varies with species and temperature 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 Grear, Michael Adams, Adam Backlin, William Barichivich, Adrianne Brand, Gary Bucciarelli, Daniel Calhoun, Tara Chestnut, Jon Davenport, Andrew E Dietrich, Graziella DiRenzo, Robert N. Fisher, Brad Glorioso, Evan Campbell Grant, Brian J. Halstead, Marc Hayes, Blake R. Hossack, Morgan Kain, Patrick 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 Watkins-Colwell, Lori Williams, Megan Winzeler
Vertebrates in trade that pose high invasion risk to the United States Vertebrates in trade that pose high invasion risk to the United States
The United States imports thousands of live vertebrate species annually as part of legal trade. Escapes and releases from captivity are major pathways of invasion, however, the risk posed by the thousands of imported vertebrate species has not been systematically assessed. We conducted a horizon scan that used a data-driven climate match to filter a list of nearly 15,000 taxa drawn from...
Authors
Wesley Daniel, Helen Sofaer, Catherine Jarnevich, Richard Erickson, Brett DeGregorio, Peder Scott Engelstad, Jonathan A. Freedman, Susan Canavan, Emily M. Dean, Michael J Adams, Charmayne L. Anderson, Mindy Barnett, Marybeth Brey, Kyle J. Brumm, Matthew S. Bunting, Emily Caffrey, Laura Cardador, Jacoby Carter, Phillip Cassey, Duane Chapman, Natalie Claunch, Timothy D. Counihan, Kristin P. Davis, Anant Deshwal, Andrew K. Douglas, Corey Dunn, Chase Ehlo, Katie Everett, Jason M. Gleditsch, Andrew Grosse, Zoey Hendrickson, Steven Hess, Jeffrey Hill, Nick Holmes, Ana Longo, Julie Lockwood, Doran M. Mason, Ashley McDonald, Matthew Neilson, Kristen Reaver, Robert Reed, Caleb Roberts, Jane Rogosch, Christina Romagosa, James Russell, Annie Simpson, Scott Smith, Jinelle Sperry, Quenton Tuckett, Kurt VerCauteren, J. Hardin Waddle, Christian Wanamaker, John Willson, Arden Williams, Deah Lieurance
Using camera traps to estimate site occupancy of invasive Argentine Black and White Tegus (Salvator merianae) in South Florida Using camera traps to estimate site occupancy of invasive Argentine Black and White Tegus (Salvator merianae) in South Florida
The introduction of nonnative species is a leading cause of biodiversity loss. Many invasive species are cryptic or elusive in nature and therefore often evade detection, complicating their management. Occupancy modeling can reveal the presence and spread of invasive species over time and therefore has important management implications. Camera traps can be used to estimate occupancy, or...
Authors
Samantha N. Smith, Melissa Miller, Hardin Waddle, Sarah Cooke, Amy Yackel Adams, Andrea Currylow, Kevin Donmoyer, Frank J. Mazzotti
Amphibian monitoring in hardwood forests: Optimizing methods for contaminant‐based compensatory restorations Amphibian monitoring in hardwood forests: Optimizing methods for contaminant‐based compensatory restorations
Amphibians such as frogs, toads, and salamanders provide important services in aquatic and terrestrial ecosystems and have been proposed as useful indicators of progress and success for ecological restoration projects. Limited guidance is available, however, on the costs and benefits of different amphibian monitoring techniques that might be applied to sites restored in compensation for
Authors
Bethany Kunz, Hardin Waddle, Nicholas S. Green
Accounting for multiple uncertainties in a decision-support population viability assessment Accounting for multiple uncertainties in a decision-support population viability assessment
Conservation and management decisions often must be made on strict timelines, based on the “best available information” regarding a species’ current and expected future status. Simulation models are valuable tools for predicting a species’ future status but must incorporate multiple types of uncertainty in order to provide a complete understanding of plausible outcomes. Here we present a
Authors
Erica M. Christensen, Abigail Lawson, E. Rivenbark, P.K. London, D. Castellanos, J.C. Culbertson, S.M. DeMay, C. Eakin, L.S. Pearson, K. Soileau, J. Waddle, Conor P. McGowan