Phylogenetics and dating norfolk uk dating

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In both examples, islands that were recently connected or are easy to disperse across do not generate new species (in the sandy island in the bottom right).

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However, changes in geography, climate or the formation of other barriers caused the range of the ancestor to fragment, with each fragmented group evolving into its own distinct species (or group of species). vicariance patterns of biogeography in an island bird (pale blue).In the bottom example, the island geography doesn’t change but in rare events a bird disperses from the main island onto a new island.

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