Drainage basins serve as multiple glacial refugia for alpine habitats in the Sierra Nevada Mountains, California.

Abstract excerpt

The evolutionary histories of alpine species are often directly associated with responses to glaciation. Deep divergence among populations and complex patterns of genetic variation have been inferred as consequences of persistence within glacier boundaries (i.e., on nunataks), while shallow divergence and limited genetic variation are assumed to result from expansion from large refugia at the edge of ice shields...

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