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Distinguishing Vicariance from Dispersal

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A decision path for interpreting a disjunct species distribution across separated landmasses.

by @openstemUpdated Biology
Disjunct distribution across separated landmassesEstimate divergence time via molecular clockDoes divergence timing match the geological age of the barrier?Consistent with vicarianceConsistent with dispersal after the barrier formedYes, similar ageNo, divergence much younger

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