A congruent molecular signature of vicariance across multiple plant lineages.

Abstract excerpt

Explaining disjunct distributions, or why closely related organisms are often separated by apparently severe barriers such as oceans or deserts, is a great challenge for historical biogeography. Competing explanations are long-distance dispersal across a barrier, and vicariance, in which disjunct taxa are descended from an ancestral population that was split by formation of the barrier. Vicariance explanations...

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