New study of land use effects on amphibian populations gets underway at UGA laboratory

ATHENS, Ga. Researchers at the University of Georgia's Savannah River Ecology Laboratory (SREL), the University of Missouri, the University of Maine and the State University of New YorkCollege of Environmental Science and Forestry (SUNY-ESF) have received funding from the National Science Foundation (NSF) to investigate amphibian population dynamics in relation to forest alteration and fragmentation resulting from forest management practices.

As part of the Land Use Effects on Amphibian Populations (LEAP) study, the researchers will conduct similar experiments in their respective regions over the next five years. In the first year (2004), experimental arrays are being created at four wetlands in each region. Each experimental array is centered on an existing isolated or ephemeral wetland, with the terrestrial habitat adjacent to the wetland divided into four equal-sized quadrants 6 to 10 acres in size. Each quadrant is randomly assigned a different treatment representing a continuum of disturbance: 1) complete clearing with coarse woody debris (CWD) removed, 2) clearing with coarse woody debris retained, 3) partial cutting (e.g., thinning), or 4) uncut forested control. Quadrants will be allowed to undergo succession in subsequent years, yielding the opportunity to follow changes in vegetation structure and amphibian responses over time.

"Several aspects of this study make it unique," said Whit Gibbons, an investigator on the project and a professor of ecology at SREL. "First the experimental nature and replication of treatments and experiments at both local and regional scales provide an unprecedented opportunity to identify major factors affecting the persistence of amphibian populations, such as differences in life history among salamanders, frogs and toads. Second, because recent research is revealing the extent and importance of upland habitat use by amphibians, this study will focus on the responses of terrestrial life stages of pond-breeding

Contact: Rosemary Forrest
University of Georgia

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