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MARMOTS ON GREAT BASIN MOUNTAINTOPS: USING GENETICS TO TEST A BIOGEOGRAPHIC PARADIGM

2005; Wiley; Volume: 86; Issue: 8 Linguagem: Inglês

10.1890/04-1227

1939-9170

Chris H. Floyd, Dirk H. Van Vuren, Bernie May,

Wildlife Ecology and Conservation

EcologyVolume 86, Issue 8 p. 2145-2153 Article MARMOTS ON GREAT BASIN MOUNTAINTOPS: USING GENETICS TO TEST A BIOGEOGRAPHIC PARADIGM Chris H. Floyd, Chris H. Floyd Department of Wildlife, Fish, and Conservation Biology, University of California, Davis, California 95616 USA Present address: Department of Biology, Phillips Hall 330, University of Wisconsin, Eau Claire, Wisconsin 54701 USA. E-mail: [email protected]Search for more papers by this authorDirk H. Van Vuren, Dirk H. Van Vuren Department of Wildlife, Fish, and Conservation Biology, University of California, Davis, California 95616 USASearch for more papers by this authorBernie May, Bernie May Department of Animal Science, University of California, Davis, California 95616 USASearch for more papers by this author Chris H. Floyd, Chris H. Floyd Department of Wildlife, Fish, and Conservation Biology, University of California, Davis, California 95616 USA Present address: Department of Biology, Phillips Hall 330, University of Wisconsin, Eau Claire, Wisconsin 54701 USA. E-mail: [email protected]Search for more papers by this authorDirk H. Van Vuren, Dirk H. Van Vuren Department of Wildlife, Fish, and Conservation Biology, University of California, Davis, California 95616 USASearch for more papers by this authorBernie May, Bernie May Department of Animal Science, University of California, Davis, California 95616 USASearch for more papers by this author First published: 01 August 2005 https://doi.org/10.1890/04-1227Citations: 37 Corresponding Editor: C. W. Fox Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract Boreal mammals in the Great Basin have long been viewed as island-bound Pleistocene relicts because they occupy island-like patches of montane habitat separated by desert lowlands that presumably are impermeable to dispersal. Recent work, however, raised the possibility that dispersal among mountain ranges is an important process in the biogeography of boreal mammals in the Great Basin. We test this proposition using genetic variation in a representative species, the yellow-bellied marmot (Marmota flaviventris). A total of 332 marmots was sampled from 10 ranges and genotyped at six microsatellite loci. If the intervening desert lowlands are impermeable barriers to dispersal, then there should be no relationship between genetic distance and geographic distance among mountaintop populations, and genetic diversity should be diminished because gene flow would not be available to replace alleles lost over thousands of generations of isolation. Our results did not support these predictions. There was a strong correlation between genetic and geographic distance, demonstrating an isolation-by-distance pattern, and genetic diversity was high. Our results suggest that marmot populations in the Great Basin may be linked by dispersal, providing a mechanism to replenish genetic variation lost by drift. 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