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Contributed Papers: Effectiveness of a Regional Corridor in Connecting Two Florida Black Bear Populations
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 popula...
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Published in: | Conservation biology 2006-02, Vol.20 (1), p.155-162 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | 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.Original Abstract: Los corredores pueden mitigar los efectos adversos de la fragmentacion de habitat mediante la restauracion o mantenimiento de la conectividad entre poblaciones discontinuas. Sin embargo, la eficacia de los corredores para carnivoros mayores ha sido objetivamente evaluada pocas veces. Utilizamos muestreo no invasivo, analisis de microsatelites,y pruebas de asignacion poblacional para evaluar la efectividad de un corredor regional para la conectividad de dos poblaciones (Osceola y Ocala) de oso negro de Florida (Ursus americanus floridanus). El movimiento de osos fue predominantemente unidireccional con una mezcla limitada de individuos de las dos poblaciones en un area del corredor. Tambien documentamos osos en Osceola que estaban asignados geneticamente a Ocala y osos en Osceola que pudieran ser descendientes de un apareamiento Osceola-Ocala. Nuestros resultados indican que el corredor Osceola-Ocala es funcional y proporciona un conducto par el flujo de genes entre estas dos poblaciones. Sin embargo, el desarrollo humano puede impedir el uso del corredor Osceola-Ocala por los osos. El muestreo no invasivo y los metodos geneticos que utilizamos proporcionan un medio para evaluar la efectividad de corredores que puede ayudar a identificar las conexiones necesarias par |
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ISSN: | 0888-8892 1523-1739 |
DOI: | 10.1111/j.1523-1739.2005.00292.x |