IngentaConnect Effectiveness of a Regional Corridor in Connecting Two Florida Bl...

Authors: DIXON, JEREMY D.; OLI, MADAN K.¹; WOOTEN, MICHAEL C.²; EASON, THOMAS H.³; McCOWN, J. WALTER⁴; PAETKAU, DAVID⁵

Source: Conservation Biology, Volume 20, Number 1, February 2006 , pp. 155-162(8)

Publisher: Blackwell Publishing

Abstract:

Corridors may mitigate the adverse effects of habitat fragmentation by restoring or maintaining connectivity between disjunct populations. The efficacy of corridors for large carnivores, however, has rarely been evaluated objectively. We used noninvasive sampling, microsatellite analysis, and population assignment tests to evaluate the effectiveness of a regional corridor in connecting two Florida black bear (Ursus americanus floridanus) populations (Osceola and Ocala). Bear movement was predominantly unidirectional, with a limited mixing of individuals from the two populations in one area of the corridor. We also documented bears in Osceola that were genetically assigned to Ocala and bears in Osceola that may be offspring from an Osceola-Ocala mating. Our results indicate that the Osceola-Ocala corridor is functional and provides a conduit for gene flow between these populations. Human development, however, may hinder the use of the Osceola-Ocala corridor by bears. The noninvasive sampling and genetic methods we used provide a means of evaluating corridor effectiveness that can help identify linkages necessary for maintaining metapopulation structure and population viability.

Keywords: dispersal; population assignment test; population connectivity; regional corridors; Ursus americanus floridanus; conectividad de poblaciones; corredores regionales; dispersión; prueba de asignación poblacional; Ursus americanus floridanus

Document Type: Research article

DOI: 10.1111/j.1523-1739.2005.00292.x

Affiliations: 1: Department of Wildlife Ecology and Conservation, University of Florida, P.O. Box 110430, Gainesville, FL 32611, U.S.A. 2: Department of Biological Sciences, Auburn University, 334 Funchess Hall, Auburn, AL 36849, U.S.A. 3: Florida Fish and Wildlife Conservation Commission, 620 South Meridian Street, Tallahassee, FL 32399, U.S.A. 4: Florida Fish and Wildlife Conservation Commission, 4005 South Main Street, Gainesville, FL 32601, U.S.A. 5: Wildlife Genetics International, 610 Railway Street, Nelson, BC, VIL 59P Canada

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Effectiveness of a Regional Corridor in Connecting Two Florida Black Bear Populations