Document Detail


Wolverine gene flow across a narrow climatic niche.
MedLine Citation:
PMID:  19967877     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Wolverines (Gulo gulo) are one of the rarest carnivores in the contiguous United States. Effective population sizes in Montana, Idaho, and Wyoming, where most of the wolverines in the contiguous United States exist, were calculated to be 35 (credible limits, 28 52) suggesting low abundance. Landscape features that influence wolverine population substructure and gene flow are largely unknown. Recent work has identified strong associations between areas with persistent spring snow and wolverine presence and range. We tested whether a dispersal model in which wolverines prefer to disperse through areas characterized by persistent spring snow cover produced least-cost paths among all individuals that correlated with genetic distance among individuals. Models simulating large preferences for dispersing within areas characterized by persistent spring snow explained the data better than a model based on Euclidean distance. Partial Mantel tests separating Euclidean distance from spring snow-cover-based effects indicated that Euclidean distance was not significant in describing patterns of genetic distance. Because these models indicated that successful dispersal paths followed areas characterized by spring snow cover, we used these understandings to derive empirically based least-cost corridor maps in the U.S. Rocky Mountains. These corridor maps largely explain previously published population subdivision patterns based on mitochondrial DNA and indicate that natural colonization of the southern Rocky Mountains by wolverines will be difficult but not impossible.
Authors:
Michael K Schwartz; Jeffrey P Copeland; Neil J Anderson; John R Squires; Robert M Inman; Kevin S McKelvey; Kristy L Pilgrim; Lisette P Waits; Samuel A Cushman
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Ecology     Volume:  90     ISSN:  0012-9658     ISO Abbreviation:  Ecology     Publication Date:  2009 Nov 
Date Detail:
Created Date:  2009-12-08     Completed Date:  2010-01-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0043541     Medline TA:  Ecology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3222-32     Citation Subset:  IM    
Affiliation:
USDA Forest Service Rocky Mountain Research Station, 800 East Beckwith, Missoula, Montana 59801, USA. mkschwartz@fs.fed.us
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MeSH Terms
Descriptor/Qualifier:
Animals
Climate*
Demography
Ecosystem
Gene Flow*
Genetic Variation
Idaho
Montana
Mustelidae / genetics*
Seasons
Wyoming

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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