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Elevation and connectivity define genetic refugia for mountain sheep as climate warms
Author(s) -
EPPS CLINTON W.,
PALSBØLL PER J.,
WEHAUSEN JOHN D.,
RODERICK GEORGE K.,
MCCULLOUGH DALE R.
Publication year - 2006
Publication title -
molecular ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.619
H-Index - 225
eISSN - 1365-294X
pISSN - 0962-1083
DOI - 10.1111/j.1365-294x.2006.03103.x
Subject(s) - ungulate , genetic diversity , biology , ecology , population , habitat , climate change , elevation (ballistics) , ovis canadensis , environmental change , geometry , mathematics , sociology , demography
Global warming is predicted to affect the evolutionary potential of natural populations. We assessed genetic diversity of 25 populations of desert bighorn sheep ( Ovis canadensis nelsoni ) in southeastern California, where temperatures have increased and precipitation has decreased during the 20th century. Populations in low‐elevation habitats had lower genetic diversity, presumably reflecting more fluctuations in population sizes and founder effects. Higher‐elevation habitats acted as reservoirs of genetic diversity. However, genetic diversity was also affected by population connectivity, which has been disrupted by human development. Restoring population connectivity may be necessary to buffer the effects of climate change on this desert‐adapted ungulate.