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Amphibian Research & Monitoring Initiative (ARMI)

In response to growing concerns over declines in amphibian populations around the world, the Department of Interior was directed to initiate a national program for amphibian monitoring, research, and conservation. USGS scientists have long been at the forefront of studying amphibian biology and ecology, their environmental needs, and potential causes of population decline. The National Amphibian Research and Monitoring Initiative (ARMI) aims to provide information to natural resource managers on the status and trends of amphibians; relate status and trends to management options at the scale of management units; identify causes of decline; and provide essential scientific information to support effective management actions to stop or reverse declines. WARC scientists coordinate and conduct ARMI activities in the South Central and Southeast ARMI regions.
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Gulf Coast waterdog (Necturus beyeri)

Using Occupancy Analysis to Understand Ecological and Environmental Stressors that Affect the Range and Abundance of Gulf Coast Waterdogs (Necturus beyeri) in Louisiana Bayous

Sampling for Gulf Coast waterdogs is providing essential information to better understand the factors that impact the species' occupancy across Louisiana.
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Species Management Research Program, Wetland and Aquatic Research Center
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Using Occupancy Analysis to Understand Ecological and Environmental Stressors that Affect the Range and Abundance of Gulf Coast Waterdogs (Necturus beyeri) in Louisiana Bayous

Sampling for Gulf Coast waterdogs is providing essential information to better understand the factors that impact the species' occupancy across Louisiana.
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PCV trap

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.
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Biological Threats and Invasive Species Research Program, Wetland and Aquatic Research Center
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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.
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Saltwater barrier along the Neches River

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.
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Species Management Research Program, Wetland and Aquatic Research Center
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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.
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Acoustic Monitoring for Two Rare Frog Species

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.
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Species Management Research Program, Wetland and Aquatic Research Center
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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.
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Cajun chorus frog

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.
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Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Land Management Research Program, Species Management Research Program, Wetland and Aquatic Research Center
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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.
Learn More
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Green frog

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.
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Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Species Management Research Program, Wetland and Aquatic Research Center
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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.
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Cuban Treefrog

Diet and Reproductive Phenology in a Recently Established Population of Invasive Cuban Treefrogs (Osteopilus septentrionalis)

WARC researchers are exploring relationships between body size, time of year, sex, and reproductive development to better understand the reproductive phenology of the New Orleans population of Cuban treefrogs compared to Florida populations.
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Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Wetland and Aquatic Research Center
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Diet and Reproductive Phenology in a Recently Established Population of Invasive Cuban Treefrogs (Osteopilus septentrionalis)

WARC researchers are exploring relationships between body size, time of year, sex, and reproductive development to better understand the reproductive phenology of the New Orleans population of Cuban treefrogs compared to Florida populations.
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Capture-Mark-Recapture of Treefrogs at Bayou Teche National Wildlife Refuge

Capture-Mark-Recapture of Treefrogs at Bayou Teche National Wildlife Refuge

WARC researchers are gathering amphibian data to better understand the impact of natural disasters on treefrog populations and examine post-event processes.
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Ecosystems Mission Area, Species Management Research Program, Wetland and Aquatic Research Center , Hurricanes
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Capture-Mark-Recapture of Treefrogs at Bayou Teche National Wildlife Refuge

WARC researchers are gathering amphibian data to better understand the impact of natural disasters on treefrog populations and examine post-event processes.
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Ornate Chorus Frog, Pseudacris ornata

Monitoring of Amphibians at St. Marks National Wildlife Refuge in Northwest Florida

Freshwater wetlands provide critical habitat for a diverse array of organisms, including many amphibians. Yet, under the threat of climate change, these habitats are among the most imperiled ecosystems on Earth.
By
Ecosystems Mission Area, Species Management Research Program, Wetland and Aquatic Research Center
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Monitoring of Amphibians at St. Marks National Wildlife Refuge in Northwest Florida

Freshwater wetlands provide critical habitat for a diverse array of organisms, including many amphibians. Yet, under the threat of climate change, these habitats are among the most imperiled ecosystems on Earth.
Learn More
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Population Demography and Food Web Analysis of Large Aquatic Salamanders (Siren and Amphiuma) in North Florida

Population Demography and Food Web Analysis of Large Aquatic Salamanders (Siren and Amphiuma) in North Florida

Understanding amphibian's life-histories can help predict how they may persist in aquatic habitats in the face of droughts and other climate change-associated events.
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Ecosystems Mission Area, Species Management Research Program, Wetland and Aquatic Research Center
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Population Demography and Food Web Analysis of Large Aquatic Salamanders (Siren and Amphiuma) in North Florida

Understanding amphibian's life-histories can help predict how they may persist in aquatic habitats in the face of droughts and other climate change-associated events.
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Evaluating the Prevalence of the Amphibian Chytrid Fungus, Batrachochytrium dendrobatidis, in the Southeastern U.S.: Any Evidenc

Evaluating the Prevalence of the Amphibian Chytrid Fungus, Batrachochytrium dendrobatidis, in the Southeastern U.S.: Any Evidence of Disease-Related Population Declines?

Pathogens and infectious disease play a role in some recent species extinctions and are likely to impact biodiversity in the future. Environmental DNA - eDNA - is coupled with traditional amphibian sampling methods to determine the distribution and prevalence of the amphibian chytrid fungus, also known as Bd, in the southeastern US.
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Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Species Management Research Program, Wetland and Aquatic Research Center
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Evaluating the Prevalence of the Amphibian Chytrid Fungus, Batrachochytrium dendrobatidis, in the Southeastern U.S.: Any Evidence of Disease-Related Population Declines?

Pathogens and infectious disease play a role in some recent species extinctions and are likely to impact biodiversity in the future. Environmental DNA - eDNA - is coupled with traditional amphibian sampling methods to determine the distribution and prevalence of the amphibian chytrid fungus, also known as Bd, in the southeastern US.
Learn More
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Use of Amphibian Communities as Indicators of Restoration Success in the Greater Everglades

Use of Amphibian Communities as Indicators of Restoration Success in the Greater Everglades

Habitat alteration and climate, when combined, are serious threats to amphibians and other wildlife. Habitat suitability models are being used to predict the responses of an amphibian community to hydrological and habitat restoration in the Greater Everglades Ecosystem.
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Ecosystems Mission Area, Land Management Research Program, Species Management Research Program, Wetland and Aquatic Research Center
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Use of Amphibian Communities as Indicators of Restoration Success in the Greater Everglades

Habitat alteration and climate, when combined, are serious threats to amphibians and other wildlife. Habitat suitability models are being used to predict the responses of an amphibian community to hydrological and habitat restoration in the Greater Everglades Ecosystem.
Learn More