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- W2019920616 abstract "Abstract: The effectiveness of corridors in maintaining dispersal in fragmented landscapes is a question of considerable conservation and ecological importance. We tested the efficacy of corridors as residual landscape structures in maintaining population structure in the red-backed vole (Clethrionomys gapperi), a closed-canopy specialist, and the deer mouse ( Peromyscus maniculatus), a habitat generalist. In coniferous forests managed for timber production in northeastern Washington, we sampled pairs of populations in three landscape classes: (1) contiguous landscapes, in which sites were located completely within a matrix of closed-canopy forest; (2) corridor landscapes, in which sites were connected by a corridor of closed-canopy forest; and (3) isolated landscapes, in which sites were separated from one another by clearcut or young regeneration stands. For each species, we used four microsatellite loci to quantify genetic distance between population pairs. Nei's genetic distance ( Ds ) increased from smallest to largest in the order of contiguous, corridor, and isolated landscapes for C. gapperi. For P. maniculatus, genetic distances across landscape configurations were not significantly different. The differences between the two species indicate that they respond differently to the presence of forest corridors. In managed forests, corridors between unlogged habitats appear to maintain higher population connectivity for C. gapperi than landscapes without corridors. Resumen: La efectividad de los corredores para mantener la dispersión en paisajes fragmentados es una situación de considerable importancia ecológica y de conservación. Evaluamos la efectividad de los corredores como estructuras residuales del paisaje en el mantenimiento de la estructura poblacional del ratón de campo de dorso café (Clethrionomys gapperi), un especialista de dosel cerrado, y del ratón ciervo ( Peromyscus maniculatus) un generalista de hábitats. Hicimos un muestreo en pares de poblaciones en bosques de coníferas manejados para la producción maderera en tres clases de paisaje de Washington nororiental: (1) contiguo, sitios localizados completamente dentro de una matriz de bosque con dosel cerrado; (2) corredor, sitios conectados por un corredor de bosque con dosel cerrado; y (3) aislado, sitios separados uno del otro por talas o por rodales de regeneración joven. Para cada especie, usamos cuatro loci microsatélite para cuantificar la distancia génica entre pares de poblaciones. Para C. gapperi, las distancias genéticas de Nei ( Ds ) se incrementaron en los paisajes en el siguiente orden: contiguo, corredor, y aislado. Para P. maniculatus, las distancias genéticas a lo largo de configuraciones del paisaje no fueron significativamente diferentes. Las diferencias entre estas dos especies indican que responden de diferente manera a la presencia de corredores forestales. En bosques manejados, los corredores entre hábitats sin talar aparentemente mantienen una conectividad poblacional mayor para C. gapperi que los paisajes sin corredores." @default.
- W2019920616 created "2016-06-24" @default.
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- W2019920616 date "2001-04-01" @default.
- W2019920616 modified "2023-09-23" @default.
- W2019920616 title "Evaluating the Effectiveness of Corridors: a Genetic Approach" @default.
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- W2019920616 doi "https://doi.org/10.1046/j.1523-1739.2001.015002467.x" @default.
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