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Retrospective Theses and Dissertations

Environmental Sciences

1998

Animal ecology

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Butterflies In The Highly Fragmented Prairies Of Central Iowa: How The Landscape Affects Population Isolation, Leslie Ries Jan 1998

Butterflies In The Highly Fragmented Prairies Of Central Iowa: How The Landscape Affects Population Isolation, Leslie Ries

Retrospective Theses and Dissertations

Ever since MacArthur and Wilson presented the Theory of Island Biogeography in 1963, there has been considerable concern about the ability of a system of isolated reserves to retain species diversity or viable populations over extended periods of time. Despite this interest, very little is known about how readily individuals move around in their landscape. Edges and corridors have both been targeted as landscape features that may have important consequences for directing movement and thereby affecting isolation. Edges may form a barrier to movement reducing the probability that an individual will leave a patch. For individuals that have left, they ...