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Jennifer Fredrickson

I am an Ecologist with the Herpetological Research Team at the USGS Forest and Rangeland Science Center in Corvallis, Oregon. My research focuses on ecology and conservation of amphibian and reptile species.  

Professional Experience

  • 2023 – Present: U.S. Geological Survey, Forest and Rangeland Science Center, Ecologist, Corvallis, OR

  • 2020 – 2023: Iowa Department of Natural Resources, Wildlife Diversity Program Research Specialist, Boone, IA 

  • 2018 – 2020: Iowa Department of Natural Resources, Assistant Wildlife Biometrician, Boone, IA 

  • 2017 – 2018: Iowa Department of Natural Resources, Prairie Management Specialist, Lehigh, IA

  • 2015 – 2017: Iowa State University, Graduate Research Assistant, Ames, IA

  • 2012 – 2014: U.S. Geological Survey, Fort Collins Science Center, Biological Technician, Fort Collins, CO

  • 2012 – 2013: U.S. Forest Service, Rocky Mountain Research Station, Biological Technician, Fort Collins, CO 

  • 2011: U.S. Geological Survey, Forest and Rangeland Science Center, Biological Technician, Corvallis, OR 

  • 2008 – 2011: U.S. Forest Service, Pacific Northwest Research Station, Forestry Aide, Corvallis, OR

Education and Certifications

  • M.S., Wildlife Ecology, Iowa State University, Ames, IA (2017) 

  • B.S., Rangeland Ecology, Colorado State University, Fort Collins, CO (2013) 

Science and Products

If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

Factors influencing anuran wetland occupancy in an agricultural landscape

Habitat disturbance is an important cause of global amphibian declines, with especially strong effects in areas of high agricultural use. Determining the influence of site characteristics on amphibian presence and success is vital to developing effective conservation strategies. We used occupancy analysis to estimate presence of four anuran species at wetlands in northern Iowa as a function of eig
Authors
Jennifer E. Swanson, Clay Pierce, Stephen J. Dinsmore, Kelly L. Smalling, Mark W. Vandever, Timothy W. Stewart, Erin L. Muths
By
Ecosystems Mission Area, Water Resources Mission Area, Cooperative Research Units, Fort Collins Science Center, New Jersey Water Science Center

Placement of intracoelomic radio transmitters and silicone passive sampling devices in northern leopard frogs (Lithobates pipiens)

Historically, wetland toxin exposure studies have relied on single time point samples from stationary sampling devices. Development of passive sampling devices (PSDs) that can be attached to individual animals within wetland habitats has greatly improved in recent years, presenting an innovative sampling technology that can potentially yield individual-specific, quantifiable data about chemical ex
Authors
Taylor Yaw, Jennifer E. Swanson, Clay Pierce, Erin L. Muths, Kelly L. Smalling, Mark W. Vandever, Bianca Anne Zaffarano
By
Cooperative Research Units

Factors influencing survival and mark retention in postmetamorphic boreal chorus frogs

The ability to track individual animals is crucial in many field studies and often requires applying marks to captured individuals. Toe clipping has historically been a standard marking method for wild amphibian populations, but more recent marking methods include visual implant elastomer and photo identification. Unfortunately, few studies have investigated the influence and effectiveness of mark
Authors
Jennifer E. Swanson, Larissa L. Bailey, Erin L. Muths, W. Chris Funk
By
Ecosystems Mission Area, Fort Collins Science Center

Non-USGS Publications**

Kaminski, D.J., Harms, T.M, Fredrickson, J.E., and Evelsizer, V.D. 2023. Hunting for Information: Iowa’s Archery Hunters are Helping Inform Management. The Wildlife Professional 17:30-34.
Swanson, J.E., Pierce, C.L., Muths, E., Vandever, M.W., Hladik, M.L., and Smalling, K.L. 2021. Amphibian Habitat Use and Pesticide Exposure in Agricultural Wetlands. Scientific Reports 8:10045.

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

link
Herpetological research at the USGS FRESC

Herpetological Research Team (FRESC)

The Herpetological Research Team focuses on issues related to conservation and management of amphibians and other aquatic and semi-aquatic species. Among our current studies are effects of invasive species, disease, and land use change on the dynamics of amphibian communities to inform conservation and management decision making.
By
Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Species Management Research Program, Forest and Rangeland Ecosystem Science Center
link

Herpetological Research Team (FRESC)

The Herpetological Research Team focuses on issues related to conservation and management of amphibians and other aquatic and semi-aquatic species. Among our current studies are effects of invasive species, disease, and land use change on the dynamics of amphibian communities to inform conservation and management decision making.
Learn More

Science and Products

If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

Factors influencing anuran wetland occupancy in an agricultural landscape

Habitat disturbance is an important cause of global amphibian declines, with especially strong effects in areas of high agricultural use. Determining the influence of site characteristics on amphibian presence and success is vital to developing effective conservation strategies. We used occupancy analysis to estimate presence of four anuran species at wetlands in northern Iowa as a function of eig
Authors
Jennifer E. Swanson, Clay Pierce, Stephen J. Dinsmore, Kelly L. Smalling, Mark W. Vandever, Timothy W. Stewart, Erin L. Muths
By
Ecosystems Mission Area, Water Resources Mission Area, Cooperative Research Units, Fort Collins Science Center, New Jersey Water Science Center

Placement of intracoelomic radio transmitters and silicone passive sampling devices in northern leopard frogs (Lithobates pipiens)

Historically, wetland toxin exposure studies have relied on single time point samples from stationary sampling devices. Development of passive sampling devices (PSDs) that can be attached to individual animals within wetland habitats has greatly improved in recent years, presenting an innovative sampling technology that can potentially yield individual-specific, quantifiable data about chemical ex
Authors
Taylor Yaw, Jennifer E. Swanson, Clay Pierce, Erin L. Muths, Kelly L. Smalling, Mark W. Vandever, Bianca Anne Zaffarano
By
Cooperative Research Units

Factors influencing survival and mark retention in postmetamorphic boreal chorus frogs

The ability to track individual animals is crucial in many field studies and often requires applying marks to captured individuals. Toe clipping has historically been a standard marking method for wild amphibian populations, but more recent marking methods include visual implant elastomer and photo identification. Unfortunately, few studies have investigated the influence and effectiveness of mark
Authors
Jennifer E. Swanson, Larissa L. Bailey, Erin L. Muths, W. Chris Funk
By
Ecosystems Mission Area, Fort Collins Science Center

Non-USGS Publications**

Kaminski, D.J., Harms, T.M, Fredrickson, J.E., and Evelsizer, V.D. 2023. Hunting for Information: Iowa’s Archery Hunters are Helping Inform Management. The Wildlife Professional 17:30-34.
Swanson, J.E., Pierce, C.L., Muths, E., Vandever, M.W., Hladik, M.L., and Smalling, K.L. 2021. Amphibian Habitat Use and Pesticide Exposure in Agricultural Wetlands. Scientific Reports 8:10045.

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

link
Herpetological research at the USGS FRESC

Herpetological Research Team (FRESC)

The Herpetological Research Team focuses on issues related to conservation and management of amphibians and other aquatic and semi-aquatic species. Among our current studies are effects of invasive species, disease, and land use change on the dynamics of amphibian communities to inform conservation and management decision making.
By
Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Species Management Research Program, Forest and Rangeland Ecosystem Science Center
link

Herpetological Research Team (FRESC)

The Herpetological Research Team focuses on issues related to conservation and management of amphibians and other aquatic and semi-aquatic species. Among our current studies are effects of invasive species, disease, and land use change on the dynamics of amphibian communities to inform conservation and management decision making.
Learn More