Abstract:
:Island systems generally have fewer species than continental areas due to their small size and geographical isolation. Low island diversity reduces the possibility of exportation of island lineages and island systems are not thought to have a major influence on the build-up of continental diversity. However, the view that islands represent the end of the colonization road has recently been challenged and islands do represent the origin of some specific continental lineages. Here we assess the net contribution of island systems to global diversity patterns of passerine birds, using a complete phylogeny (5,949 species), biogeographical regionalization and null-model comparisons. We show that, in contrast to major continental regions, island regions export relatively more evolutionary lineages than would be expected based on current distributional patterns. This result challenges a central paradigm in island biogeography and changes our perception of the relative importance of islands for the build-up of global diversity.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Jønsson KA,Holt BGdoi
10.1038/ncomms9538subject
Has Abstractpub_date
2015-10-05 00:00:00pages
8538issn
2041-1723pii
ncomms9538journal_volume
6pub_type
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