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Mountaintop island age determines species richness of boreal mammals in the American Southwest

Ecography

By:
, ,
DOI: 10.1111/j.2007.0906-7590.04721.x

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Abstract

Models that describe the mechanisms responsible for insular patterns of species richness include the equilibrium theory of island biogeography and the nonequilibrium vicariance model. The relative importance of dispersal or vicariance in structuring insular distribution patterns can be inferred from these models. Predictions of the alternative models were tested for boreal mammals in the American Southwest. Age of mountaintop islands of boreal habitat was determined by constructing a geographic cladogram based on characteristics of intervening valley barriers. Other independent variables included area and isolation of mountaintop islands. Island age was the most important predictor of species richness. In contrast with previous studies of species richness patterns in this system, these results supported the nonequilibrium vicariance model, which indicates that vicariance has been the primary determinant of species distribution patterns in this system. Copyright ?? Ecography 2007.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Mountaintop island age determines species richness of boreal mammals in the American Southwest
Series title:
Ecography
DOI:
10.1111/j.2007.0906-7590.04721.x
Volume
30
Issue:
2
Year Published:
2007
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Ecography
First page:
231
Last page:
240
Number of Pages:
10