Article
Integrating paleoecology and genetics of bird populations in two sky island archipelagos.
BMC biology - 27 Jun 2008
McCormack John E, Bowen Bonnie S, Smith Thomas B
Abstract excerpt
BACKGROUND: Genetic tests of paleoecological hypotheses have been rare, partly because recent genetic divergence is difficult to detect and time. According to fossil plant data, continuous woodland in the southwestern USA and northern Mexico became fragmented during the last 10,000 years, as warming caused cool-adapted species to retreat to high elevations. Most genetic studies of resulting 'sky islands' have...
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