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
Filter Total Items: 27
Data for herpetofaunal inventories of the national parks of South Florida and the Caribbean: Volume II, Virgin Islands National Park Data for herpetofaunal inventories of the national parks of South Florida and the Caribbean: Volume II, Virgin Islands National Park
The Comprehensive Everglades Restoration Plan (CERP) requires the use of ecological indicators to measure the success of restoration efforts. The Everglades amphibian community is ideal because amphibians are present in all habitats and under all hydrologic regimes. During Everglades restoration, hydrologic patterns will change and the response of ecological indicators will determine...
Data for herpetofaunal inventories of the national parks of South Florida and the Caribbean: Volume IV, Biscayne National Park Data for herpetofaunal inventories of the national parks of South Florida and the Caribbean: Volume IV, Biscayne National Park
The Comprehensive Everglades Restoration Plan (CERP) requires the use of ecological indicators to measure the success of restoration efforts. The Everglades amphibian community is ideal because amphibians are present in all habitats and under all hydrologic regimes. During Everglades restoration, hydrologic patterns will change and the response of ecological indicators will determine...
Data for herpetofaunal inventories of the national parks of South Florida and the Caribbean: Volume III, Big Cypress National Preserve Data for herpetofaunal inventories of the national parks of South Florida and the Caribbean: Volume III, Big Cypress National Preserve
The Comprehensive Everglades Restoration Plan (CERP) requires the use of ecological indicators to measure the success of restoration efforts. The Everglades amphibian community is ideal because amphibians are present in all habitats and under all hydrologic regimes. During Everglades restoration, hydrologic patterns will change and the response of ecological indicators will determine...
Filter Total Items: 76
Evaluating the effect of expert elicitation techniques on population status assessment in the face of large uncertainty 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...
Authors
Jennifer Moore, Julien Martin, Hardin Waddle, Evan Campbell Grant, Jillian Fleming, Eve Bohnett, Thomas Akre, Donald J. Brown, Michael Jones, Jessica Meck, Kevin Oxenrider, Anthony Tur, Lisabeth Willey, Fred Johnson
Hierarchical models improve the use of alligator abundance as an indicator Hierarchical models improve the use of alligator abundance as an indicator
Indicator species are species which can be monitored as an index to measure the overall health of an ecosystem. Crocodylians have been shown to be good indicators of wetland condition as they respond to changes in hydrology, can be efficiently monitored, and are a key part of ecosystem trophic relationships. Eye shine surveys at night are a standard method used to sample alligators, but...
Authors
Seth Farris, J. Hardin Waddle, Caitlin Hackett, Laura Brandt, Frank J. Mazzotti
Changes in vegetation structure and gopher tortoise population structure after 17 years of restoration management Changes in vegetation structure and gopher tortoise population structure after 17 years of restoration management
We examined a study plot sampled in the Conecuh National Forest of southern Alabama in 1999 and again in 2016 after stand thinning and persistent prescribed fire were used to improve habitat quality. These management activities were designed, in part, to enhance habitat quality for the gopher tortoise (Gopherus polyphemus), a species considered for protection under the Endangered Species...
Authors
Rebecca Pudner, Hardin Waddle, Suzi Mersmann, John Kush, Craig Guyer, Sharon Hermann
Abundance of Gulf Coast Waterdogs (Necturus beyeri) along Bayou Lacombe, Saint Tammany Parish, Louisiana Abundance of Gulf Coast Waterdogs (Necturus beyeri) along Bayou Lacombe, Saint Tammany Parish, Louisiana
Few ecological studies have been conducted on Gulf Coast Waterdogs (Necturus beyeri), and published studies have focused on relatively small stream sections of 125 m to 1.75 km. In 2015, we sampled 25 sites along a 13.4-km stretch of Bayou Lacombe (Saint Tammany Parish, Louisiana, USA) to better understand factors that may influence the distribution of Gulf Coast Waterdogs within streams...
Authors
Brad Glorioso, Hardin Waddle, Lindy Muse, Sidney T Godfrey
Demographic responses to density-dependence by two populations of the Florida Tree Snail, Liguus fasciatus (Gastropoda: Orthalicidae), in Everglades National Park Demographic responses to density-dependence by two populations of the Florida Tree Snail, Liguus fasciatus (Gastropoda: Orthalicidae), in Everglades National Park
During May-October 1996, we captured and individually marked and released Florida Tree Snails, Liguus fasciatus, from two sites, a subclimax hammock and a large isolated wild tamarind tree, in the Long Pine Key region of Everglades National Park. Populations shared the same two dominant morphs, castaneozonatus and. cingulatus, both of which are strong colonizers. Monthly survivorship...
Authors
Walter Meshaka, Kenneth Rice, Oron L. Bass, Hardin Waddle
Widespread Ranavirus and Perkinsea infections in Cuban treefrogs (Osteopilus septentrionalis) invading New Orleans, USA Widespread Ranavirus and Perkinsea infections in Cuban treefrogs (Osteopilus septentrionalis) invading New Orleans, USA
Invasive species can negatively impact ecosystems in numerous ways, including vectoring pathogenic organisms. In amphibians, a lineage globally threatened by multiple pathogens, this spread of disease via invasive species could contribute to declines in native populations. The Cuban Treefrog (Osteopilus septentrionalis) is invasive in the southeastern USA. To assess whether O...
Authors
Net Galt, Matthew Atkinson, Brad Glorioso, Hardin Waddle, Melanie Litton, Anna Savage
Tropicalization of temperate ecosystems in North America: The northward range expansion of tropical organisms in response to warming winter temperatures Tropicalization of temperate ecosystems in North America: The northward range expansion of tropical organisms in response to warming winter temperatures
Tropicalization is a term used to describe the transformation of temperate ecosystems by poleward‐moving tropical organisms in response to warming temperatures. In North America, decreases in the frequency and intensity of extreme winter cold events are expected to allow the poleward range expansion of many cold‐sensitive tropical organisms, sometimes at the expense of temperate...
Authors
Michael Osland, Philip Stevens, Margaret Lamont, Richard Brusca, Kristen Hart, Hardin Waddle, Catherine Langtimm, Caroline Williams, Barry Keim, Adam Terando, Eric Reyier, Katie Marshall, Michael Loik, Ross Boucek, Amanda Lewis, Jeffrey Seminoff
Batrachochytrium salamandrivorans (Bsal) not detected in an intensive survey of wild North American amphibians Batrachochytrium salamandrivorans (Bsal) not detected in an intensive survey of wild North American amphibians
The salamander chytrid fungus (Batrachochytrium salamandrivorans [Bsal]) is causing massive mortality of salamanders in Europe. The potential for spread via international trade into North America and the high diversity of salamanders has catalyzed concern about Bsal in the U.S. Surveillance programs for invading pathogens must initially meet challenges that include low rates of...
Authors
J. Hardin Waddle, Daniel Grear, Brittany Mosher, Evan Campbell Grant, Michael Adams, Adam Backlin, William Barichivich, Adrianne Brand, Gary Bucciarelli, Daniel Calhoun, Tara Chestnut, Jon M. Davenport, Andrew Dietrich, Robert Fisher, Brad Glorioso, Brian J. Halstead, Marc Hayes, R. Honeycutt, Blake R. Hossack, Patrick Kleeman, Julio Lemos-Espinal, Jeffrey Lorch, Robert Atkinson, Erin Muths, Christopher Pearl, Katherine Richgels, Charles Robinson, Mark Roth, Jennifer Rowe, Walter Sadinski, Brent Sigafus, Iga Stasiak, Samuel Sweet, Susan C. Walls, Gregory Watkins-Colwell, C. White, Lori Williams, Megan Winzeler
A trapping survey targeting head-started alligator snapping turtles in southwest Louisiana A trapping survey targeting head-started alligator snapping turtles in southwest Louisiana
The alligator snapping turtle Macrochelys temminckii is the largest freshwater turtle in North America and is sought after as a food source, primarily in Louisiana. Decades of intensive commercial harvest of alligator snapping turtles has been implicated in population declines. The Louisiana Department of Wildlife and Fisheries initiated a head-start program for alligator snapping...
Authors
Brad Glorioso, Lindy Muse, Cory Hillard, Brittany Maldonado, Jared Streeter, Charles Battaglia, J. Waddle
Effects of barrier island salt marsh restoration on marsh bird occurrence in the Northern Gulf of Mexico Effects of barrier island salt marsh restoration on marsh bird occurrence in the Northern Gulf of Mexico
In the Northern Gulf of Mexico, salt marshes are threatened by sea level rise, erosion, and loss of protective barrier islands. These barrier islands provide critical habitat for wildlife, including globally significant populations of marsh and shorebirds. We investigated salt marsh restoration on two Louisiana barrier islands using presence of 8 marsh bird species as an index to...
Authors
Paige Byerly, Hardin Waddle, Alexis Premeaux, Paul Leberg
Egg counts of Southern Leopard Frog, Lithobates sphenocephalus, egg masses from southern Louisiana, USA Egg counts of Southern Leopard Frog, Lithobates sphenocephalus, egg masses from southern Louisiana, USA
Southern Leopard Frogs, Lithobates sphenocephalus (Cope, 1889), lay eggs year-round in their southern range, including Louisiana, but their peak breeding season is the cooler months from late fall through early spring (Mount, 1975; Caldwell, 1986; Dundee and Rossman, 1989). Double-enveloped eggs in globular masses are typically deposited in shallow water, but deeper waters are used when
Authors
Brad Glorioso, Lindy Muse, J. Waddle
Herpetofauna occupancy and community composition along a tidal swamp salinity gradient Herpetofauna occupancy and community composition along a tidal swamp salinity gradient
Occupancy patterns of herpetofauna in most tidal freshwater swamps are unknown. Tidal freshwater swamps currently face multiple threats, including salinization, which can influence their associated plant and animal communities. The impacts of salinization to herpetofauna communities in tidal freshwater swamps have not been assessed. To improve predictions regarding these herpetofauna, we...
Authors
Sidney T Godfrey, J. Waddle, Robert F Baldwin, William Conner, William C Bridges, Jamie A. Duberstein
Science and Products
Filter Total Items: 19
Filter Total Items: 27
Data for herpetofaunal inventories of the national parks of South Florida and the Caribbean: Volume II, Virgin Islands National Park Data for herpetofaunal inventories of the national parks of South Florida and the Caribbean: Volume II, Virgin Islands National Park
The Comprehensive Everglades Restoration Plan (CERP) requires the use of ecological indicators to measure the success of restoration efforts. The Everglades amphibian community is ideal because amphibians are present in all habitats and under all hydrologic regimes. During Everglades restoration, hydrologic patterns will change and the response of ecological indicators will determine...
Data for herpetofaunal inventories of the national parks of South Florida and the Caribbean: Volume IV, Biscayne National Park Data for herpetofaunal inventories of the national parks of South Florida and the Caribbean: Volume IV, Biscayne National Park
The Comprehensive Everglades Restoration Plan (CERP) requires the use of ecological indicators to measure the success of restoration efforts. The Everglades amphibian community is ideal because amphibians are present in all habitats and under all hydrologic regimes. During Everglades restoration, hydrologic patterns will change and the response of ecological indicators will determine...
Data for herpetofaunal inventories of the national parks of South Florida and the Caribbean: Volume III, Big Cypress National Preserve Data for herpetofaunal inventories of the national parks of South Florida and the Caribbean: Volume III, Big Cypress National Preserve
The Comprehensive Everglades Restoration Plan (CERP) requires the use of ecological indicators to measure the success of restoration efforts. The Everglades amphibian community is ideal because amphibians are present in all habitats and under all hydrologic regimes. During Everglades restoration, hydrologic patterns will change and the response of ecological indicators will determine...
Filter Total Items: 76
Evaluating the effect of expert elicitation techniques on population status assessment in the face of large uncertainty 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...
Authors
Jennifer Moore, Julien Martin, Hardin Waddle, Evan Campbell Grant, Jillian Fleming, Eve Bohnett, Thomas Akre, Donald J. Brown, Michael Jones, Jessica Meck, Kevin Oxenrider, Anthony Tur, Lisabeth Willey, Fred Johnson
Hierarchical models improve the use of alligator abundance as an indicator Hierarchical models improve the use of alligator abundance as an indicator
Indicator species are species which can be monitored as an index to measure the overall health of an ecosystem. Crocodylians have been shown to be good indicators of wetland condition as they respond to changes in hydrology, can be efficiently monitored, and are a key part of ecosystem trophic relationships. Eye shine surveys at night are a standard method used to sample alligators, but...
Authors
Seth Farris, J. Hardin Waddle, Caitlin Hackett, Laura Brandt, Frank J. Mazzotti
Changes in vegetation structure and gopher tortoise population structure after 17 years of restoration management Changes in vegetation structure and gopher tortoise population structure after 17 years of restoration management
We examined a study plot sampled in the Conecuh National Forest of southern Alabama in 1999 and again in 2016 after stand thinning and persistent prescribed fire were used to improve habitat quality. These management activities were designed, in part, to enhance habitat quality for the gopher tortoise (Gopherus polyphemus), a species considered for protection under the Endangered Species...
Authors
Rebecca Pudner, Hardin Waddle, Suzi Mersmann, John Kush, Craig Guyer, Sharon Hermann
Abundance of Gulf Coast Waterdogs (Necturus beyeri) along Bayou Lacombe, Saint Tammany Parish, Louisiana Abundance of Gulf Coast Waterdogs (Necturus beyeri) along Bayou Lacombe, Saint Tammany Parish, Louisiana
Few ecological studies have been conducted on Gulf Coast Waterdogs (Necturus beyeri), and published studies have focused on relatively small stream sections of 125 m to 1.75 km. In 2015, we sampled 25 sites along a 13.4-km stretch of Bayou Lacombe (Saint Tammany Parish, Louisiana, USA) to better understand factors that may influence the distribution of Gulf Coast Waterdogs within streams...
Authors
Brad Glorioso, Hardin Waddle, Lindy Muse, Sidney T Godfrey
Demographic responses to density-dependence by two populations of the Florida Tree Snail, Liguus fasciatus (Gastropoda: Orthalicidae), in Everglades National Park Demographic responses to density-dependence by two populations of the Florida Tree Snail, Liguus fasciatus (Gastropoda: Orthalicidae), in Everglades National Park
During May-October 1996, we captured and individually marked and released Florida Tree Snails, Liguus fasciatus, from two sites, a subclimax hammock and a large isolated wild tamarind tree, in the Long Pine Key region of Everglades National Park. Populations shared the same two dominant morphs, castaneozonatus and. cingulatus, both of which are strong colonizers. Monthly survivorship...
Authors
Walter Meshaka, Kenneth Rice, Oron L. Bass, Hardin Waddle
Widespread Ranavirus and Perkinsea infections in Cuban treefrogs (Osteopilus septentrionalis) invading New Orleans, USA Widespread Ranavirus and Perkinsea infections in Cuban treefrogs (Osteopilus septentrionalis) invading New Orleans, USA
Invasive species can negatively impact ecosystems in numerous ways, including vectoring pathogenic organisms. In amphibians, a lineage globally threatened by multiple pathogens, this spread of disease via invasive species could contribute to declines in native populations. The Cuban Treefrog (Osteopilus septentrionalis) is invasive in the southeastern USA. To assess whether O...
Authors
Net Galt, Matthew Atkinson, Brad Glorioso, Hardin Waddle, Melanie Litton, Anna Savage
Tropicalization of temperate ecosystems in North America: The northward range expansion of tropical organisms in response to warming winter temperatures Tropicalization of temperate ecosystems in North America: The northward range expansion of tropical organisms in response to warming winter temperatures
Tropicalization is a term used to describe the transformation of temperate ecosystems by poleward‐moving tropical organisms in response to warming temperatures. In North America, decreases in the frequency and intensity of extreme winter cold events are expected to allow the poleward range expansion of many cold‐sensitive tropical organisms, sometimes at the expense of temperate...
Authors
Michael Osland, Philip Stevens, Margaret Lamont, Richard Brusca, Kristen Hart, Hardin Waddle, Catherine Langtimm, Caroline Williams, Barry Keim, Adam Terando, Eric Reyier, Katie Marshall, Michael Loik, Ross Boucek, Amanda Lewis, Jeffrey Seminoff
Batrachochytrium salamandrivorans (Bsal) not detected in an intensive survey of wild North American amphibians Batrachochytrium salamandrivorans (Bsal) not detected in an intensive survey of wild North American amphibians
The salamander chytrid fungus (Batrachochytrium salamandrivorans [Bsal]) is causing massive mortality of salamanders in Europe. The potential for spread via international trade into North America and the high diversity of salamanders has catalyzed concern about Bsal in the U.S. Surveillance programs for invading pathogens must initially meet challenges that include low rates of...
Authors
J. Hardin Waddle, Daniel Grear, Brittany Mosher, Evan Campbell Grant, Michael Adams, Adam Backlin, William Barichivich, Adrianne Brand, Gary Bucciarelli, Daniel Calhoun, Tara Chestnut, Jon M. Davenport, Andrew Dietrich, Robert Fisher, Brad Glorioso, Brian J. Halstead, Marc Hayes, R. Honeycutt, Blake R. Hossack, Patrick Kleeman, Julio Lemos-Espinal, Jeffrey Lorch, Robert Atkinson, Erin Muths, Christopher Pearl, Katherine Richgels, Charles Robinson, Mark Roth, Jennifer Rowe, Walter Sadinski, Brent Sigafus, Iga Stasiak, Samuel Sweet, Susan C. Walls, Gregory Watkins-Colwell, C. White, Lori Williams, Megan Winzeler
A trapping survey targeting head-started alligator snapping turtles in southwest Louisiana A trapping survey targeting head-started alligator snapping turtles in southwest Louisiana
The alligator snapping turtle Macrochelys temminckii is the largest freshwater turtle in North America and is sought after as a food source, primarily in Louisiana. Decades of intensive commercial harvest of alligator snapping turtles has been implicated in population declines. The Louisiana Department of Wildlife and Fisheries initiated a head-start program for alligator snapping...
Authors
Brad Glorioso, Lindy Muse, Cory Hillard, Brittany Maldonado, Jared Streeter, Charles Battaglia, J. Waddle
Effects of barrier island salt marsh restoration on marsh bird occurrence in the Northern Gulf of Mexico Effects of barrier island salt marsh restoration on marsh bird occurrence in the Northern Gulf of Mexico
In the Northern Gulf of Mexico, salt marshes are threatened by sea level rise, erosion, and loss of protective barrier islands. These barrier islands provide critical habitat for wildlife, including globally significant populations of marsh and shorebirds. We investigated salt marsh restoration on two Louisiana barrier islands using presence of 8 marsh bird species as an index to...
Authors
Paige Byerly, Hardin Waddle, Alexis Premeaux, Paul Leberg
Egg counts of Southern Leopard Frog, Lithobates sphenocephalus, egg masses from southern Louisiana, USA Egg counts of Southern Leopard Frog, Lithobates sphenocephalus, egg masses from southern Louisiana, USA
Southern Leopard Frogs, Lithobates sphenocephalus (Cope, 1889), lay eggs year-round in their southern range, including Louisiana, but their peak breeding season is the cooler months from late fall through early spring (Mount, 1975; Caldwell, 1986; Dundee and Rossman, 1989). Double-enveloped eggs in globular masses are typically deposited in shallow water, but deeper waters are used when
Authors
Brad Glorioso, Lindy Muse, J. Waddle
Herpetofauna occupancy and community composition along a tidal swamp salinity gradient Herpetofauna occupancy and community composition along a tidal swamp salinity gradient
Occupancy patterns of herpetofauna in most tidal freshwater swamps are unknown. Tidal freshwater swamps currently face multiple threats, including salinization, which can influence their associated plant and animal communities. The impacts of salinization to herpetofauna communities in tidal freshwater swamps have not been assessed. To improve predictions regarding these herpetofauna, we...
Authors
Sidney T Godfrey, J. Waddle, Robert F Baldwin, William Conner, William C Bridges, Jamie A. Duberstein