Evaluating the Effectiveness of Corridors: a Genetic Approach

摘要: : The effectiveness of corridors in maintaining dispersal fragmented landscapes is a question considerable conservation and ecological importance. We tested the efficacy as residual landscape structures population structure red-backed vole (Clethrionomys gapperi), closed-canopy specialist, deer mouse (  Peromyscus maniculatus), habitat generalist. In coniferous forests managed for timber production northeastern Washington, we sampled pairs populations three classes: (1) contiguous landscapes, which sites were located completely within matrix forest; (2) corridor connected by (3) isolated separated from one another clearcut or young regeneration stands. For each species, used four microsatellite loci to quantify genetic distance between pairs. Nei's (  Ds  ) increased smallest largest order contiguous, corridor, C. gapperi. P. maniculatus, distances across configurations not significantly different. differences two species indicate that they respond differently presence forest corridors. forests, unlogged habitats appear maintain higher connectivity gapperi than without corridors. Resumen: La efectividad de los corredores para mantener la dispersion en paisajes fragmentados es una situacion importancia ecologica y conservacion. Evaluamos como estructuras residuales del paisaje el mantenimiento estructura poblacional raton campo dorso cafe un especialista dosel cerrado, ciervo maniculatus) generalista habitats. Hicimos muestreo pares poblaciones bosques coniferas manejados produccion maderera tres clases Washington nororiental: contiguo, sitios localizados completamente dentro matriz bosque con cerrado; corredor, conectados por corredor aislado, separados uno otro talas o rodales regeneracion joven. Para cada especie, usamos cuatro microsatelite cuantificar distancia genica entre poblaciones. gapperi, las distancias geneticas Nei ( Ds   ) se incrementaron siguiente orden: aislado. lo largo configuraciones no fueron significativamente diferentes. Las diferencias estas dos especies indican que responden diferente manera presencia forestales. En manejados, sin talar aparentemente mantienen conectividad mayor corredores.