Does Coevolution Promote Species Richness in Parasitic Cuckoos?


Show simple item record Krüger, Oliver en_US Sorenson, Michael D. en_US Davies, Nicholas B. en_US 2012-01-11T16:55:02Z 2012-01-11T16:55:02Z 2009 en_US 2009-8-19 en_US
dc.identifier.citation Krüger, Oliver, Michael D. Sorenson, Nicholas B. Davies. "Does coevolution promote species richness in parasitic cuckoos?" Proceedings of the Royal Society B 276(1674): 3871-3879. (2009) en_US
dc.identifier.issn 1471-2954 en_US
dc.description.abstract Why some lineages have diversified into larger numbers of species than others is a fundamental but still relatively poorly understood aspect of the evolutionary process. Coevolution has been recognized as a potentially important engine of speciation, but has rarely been tested in a comparative framework. We use a comparative approach based on a complete phylogeny of all living cuckoos to test whether parasite-host coevolution is associated with patterns of cuckoo species richness. There are no clear differences between parental and parasitic cuckoos in the number of species per genus. However, a cladogenesis test shows that brood parasitism is associated with both significantly higher speciation and extinction rates. Furthermore, subspecies diversification rate estimates were over twice as high in parasitic cuckoos as in parental cuckoos. Among parasitic cuckoos, there is marked variation in the severity of the detrimental effects on host fitness; chicks of some cuckoo species are raised alongside the young of the host and others are more virulent, with the cuckoo chick ejecting or killing the eggs/young of the host. We show that cuckoos with a more virulent parasitic strategy have more recognized subspecies. In addition, cuckoo species with more recognized subspecies have more hosts. These results hold after controlling for confounding geographical effects such as range size and isolation in archipelagos. Although the power of our analyses is limited by the fact that brood parasitism evolved independently only three times in cuckoos, our results suggest that coevolutionary arms races with hosts have contributed to higher speciation and extinction rates in parasitic cuckoos. en_US
dc.description.sponsorship Royal Society (Research Fellowship); Natural Environmental Research Council en_US
dc.language.iso en en_US
dc.publisher The Royal Society en_US
dc.rights Copyright 2009 The Royal Society This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. en_US
dc.rights.uri en_US
dc.subject Comparative analysis en_US
dc.subject Parasite-host coevolution en_US
dc.subject Speciation en_US
dc.subject Subspecies en_US
dc.subject Virulence en_US
dc.title Does Coevolution Promote Species Richness in Parasitic Cuckoos? en_US
dc.type article en_US
dc.identifier.doi 10.1098/rspb.2009.1142 en_US
dc.identifier.pubmedid 19692405 en_US
dc.identifier.pmcid 2817292 en_US

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