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Highways block gene flow and cause a rapid decline in genetic diversity of desert bighorn sheep

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Epps, Clinton W, Palsboll, Per J, Wehausen, John D, Roderick, George K, Ramey, Rob R, and McCullough, Dale R, Highways block gene flow and cause a rapid decline in genetic diversity of desert bighorn sheep: .

Summary

The rapid expansion of road networks has reduced connectivity among populations of flora and fauna. The resulting isolation is assumed to increase population extinction rates, in part because of the loss of genetic diversity. However, there are few cases where loss of genetic diversity has been linked directly to roads or other barriers. We analysed the effects of such barriers on connectivity and genetic diversity of 27 populations of Ovis canadensis nelsoni (desert bighorn sheep). We used partial Mantel tests, multiple linear regression and coalescent simulations to infer changes in gene flow and diversity of nuclear and mitochondrial DNA markers. Our findings link a rapid reduction in genetic diversity (up to 15%) to as few as 40 [...]

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  • Upper Colorado River Basin

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From Source - Mendeley RIS Export <br> On - Wed Sep 19 08:12:57 MDT 2012

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Title Citation Highways block gene flow and cause a rapid decline in genetic diversity of desert bighorn sheep

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