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Amphibian use of wetland-limited landscapes (Collaborator: A.J.K. Calhoun, UMaine)

High elevation fishless lake in western Maine.<br /><br /><br />


January 2010 - December 2016


Amphibian populations face a multitude of complex threats, and habitat loss or modification is contributing to amphibian declines globally. This study examines vernal pool breeding amphibian species’ use of wetland-limited landscapes, to understand factors potentially affecting persistence of these species in western and northern Maine. We are monitoring movements of post-breeding wood frogs with radio telemetry to determine their hibernacula selection, and we resume tracking in late winter to determine wetlands used for breeding. The habitat use information gained from our telemetry studies will be combined with data from presence and reproductive effort surveys to improve our understanding of how wetlands and the surrounding high elevation landscapes are used throughout the year by pool-breeding species in Maine.

Research Products and Activities

Peer Reviewed Publications

  • Groff, L.A., C.S. Loftin, and A.J.K Calhoun. LITHOBATES SYLVATICUS (Wood Frog). HIBERNATION.
  • Groff, L.A., A.J.K Calhoun, C.S. Loftin. 2015. LITHOBATES SYLVATICUS (Wood Frog). HABITAT USE. Northeastern Naturalist 46(2): 2015. Download  | 
  • Groff, L.A., A.L. Pitt, R.F. Baldwin, A.J.K. Calhoun, and C.S. Loftin. 2015. Evaluation of a waistband for attaching external transmitters to anurans. Wildlife Society Bulletin. Download  | 
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  • Groff, L. 2016. The habitat ecology of pool breeding amphibians during all annual life history periods in the Mountains of the Dawn. Dissertation. The University of Maine, Orono, Maine. 147 pp.


  • Groff, L., C.S. Loftin, and A.J.K Calhoun. 2011. Use of High Elevation Lake Landscapes by Pool Breeding Amphibians, 12 April, Maine Cooperative Fish and Wildlife Research Unit Annual Coordinating Committee Meeting, Wells Commons, University of Maine, Orono (poster). Invited.
  • Groff, L., C.S. Loftin, and A.J.K Calhoun. 2011. Use of High Elevation Lake Landscapes by Pool Breeding Amphibians, 15 April, EPScOR; 2011 Annual NECC Meeting, Wells Conference Center, University of Maine, Orono (poster). Invited.
  • Groff, L.A., A.J.K. Calhoun and C.S. Loftin. 2012. Habitat Use by Pool-Breeding Amphibians in Maine’s Western Highlands. Annual Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit; Orono, Maine, USA. 20 March. (poster)
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Current Staff

Federal Staff: 95

Masters Students: 238

Phd Students: 144

Post Docs: 54

University Staff: 239

5 Year Summary

Students graduated: 673

Scientific Publications: 1905

Presentations: 4235



Funding Agencies

  • Maine EPSCor Project


Cooperative Research Units Program Headquarters Cooperators

  1. U.S. Geological Survey