Gene flow and rapid differentiation characterize a rapid insular radiation in the southwest Pacific (Aves: Zosterops).

Abstract excerpt

As a dispersive lineage expands its distribution across a heterogeneous landscape, it leaves behind allopatric populations with varying degrees of geographic isolation that often differentiate rapidly. In the case of oceanic islands, even narrowly separated populations often differentiate, which seems contrary to the highly dispersive nature of the founding lineage. This pattern of highly dispersive lineages...

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