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Retrospective Theses and Dissertations

Environmental Sciences

2004

Evolution and organismal biology

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Full-Text Articles in Life Sciences

Corridors And Some Ecological And Evolutionary Consequences Of Connectivity , John Lee Orrock Ii Jan 2004

Corridors And Some Ecological And Evolutionary Consequences Of Connectivity , John Lee Orrock Ii

Retrospective Theses and Dissertations

By connecting disjunct patches, corridors may offset the effects of fragmentation by promoting gene flow and population persistence. However, the ultimate effect of corridors on a focal species may hinge upon two considerations: how corridors may affect ecological interactions that impinge upon that species, and how corridors might affect the fixation of novel alleles that ultimately determine fitness and persistence. Using an experimental landscape, I show that corridor-mediated changes in patch shape change seed predation in connected and unconnected patches, and shift the behavior, abundance, and distribution of seed predators. Rodent seed predators removed more seeds in connected patches, arthropod ...