Cooperative Research Units
Education, Research And Technical Assistance For Managing Our Natural Resources
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Amphibian Occupancy and Effects of Habitat Use on Chemical Exposure in Northern Leopard Frogs (Lithobates pipens) in Iowa Prairie Pothole Wetlands


November 2013 - December 2018


Goals and Objectives:
- Determine amphibian occupancy rates in Iowa Prairie Pothole Region wetlands
- Correlate wetland habitat characteristics with amphibian species presence or absence
- Document post-breeding movement patterns of northern leopard frogs on Conservation Reserve Enhancement Program wetlands
- Assess the effect of surrounding land use practices as they contribute to chemical exposure and concentrations in northern leopard frogs


Current Staff

Federal Staff: 101

Masters Students: 234

Phd Students: 160

Post Docs: 60

University Staff: 268

5 Year Summary

Students graduated: 671

Scientific Publications: 1868

Presentations: 4326



  • Clay PiercePrincipal Investigator
  • Jennifer SwansonStudent

Funding Agencies

  • ARMI
  • USGS Fort Collins Science Center


Cooperative Research Units Program Headquarters Cooperators

  1. U.S. Geological Survey