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Title: A common tendency for phylogenetic overdispersion in mammalian assemblages
Authors: Cooper, Natalie
Rodríguez, Jesús
Purvis, Andy ‎
Keywords: Net relatedness index;Nearest taxon index;Possum;Squirrel;Monkey;Community phylogenetics
Issue Date: May-2008
Publisher: The Royal Society
Citation: Proceedings of the Royal Society B: Biological Sciences, 2008, 275, 1646, 2031-2037
Abstract: Competition has long been proposed as an important force in structuring mammalian communities. Although early work recognized that competition has a phylogenetic dimension, only with recent increases in the availability of phylogenies have true phylogenetic investigations of mammalian community structure become possible. We test whether the phylogenetic structure of 142 assemblages from three mammalian clades (New World monkeys, North American ground squirrels and Australasian possums) shows the imprint of competition. The full set of assemblages display a highly significant tendency for members to be more distantly related than expected by chance (phylogenetic overdispersion). The overdispersion is also significant within two of the clades (monkeys and squirrels) separately. This is the first demonstration of widespread overdispersion in mammal assemblages and implies an important role for either competition between close relatives where traits are conserved, habitat filtering where distant relatives share convergent traits, or both.
ISSN: 0962-8452
DOI: 10.1098/rspb.2008.0420
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Type: Article
Appears in Collections:Paleobiología

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