Cichlid species-area relationships are shaped by adaptive radiations that scale with area

Wagner, Catherine; Harmon, Luke J.; Seehausen, Ole; Morlon, Helene (2014). Cichlid species-area relationships are shaped by adaptive radiations that scale with area. Ecology Letters, 17(5), pp. 583-592. Wiley-Blackwell Publishing 10.1111/ele.12260

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A positive relationship between species richness and island size is thought to emerge from an equilibrium between immigration and extinction rates, but the influence of species diversification on the form of this relationship is poorly understood. Here, we show that within-lake adaptive radiation strongly modifies the species-area relationship for African cichlid fishes. The total number of species derived from in situ speciation increases with lake size, resulting in faunas orders of magnitude higher in species richness than faunas assembled by immigration alone. Multivariate models provide evidence for added influence of lake depth on the species-area relationship. Diversity of clades representing within-lake radiations show responses to lake area, depth and energy consistent with limitation by these factors, suggesting that ecological factors influence the species richness of radiating clades within these ecosystems. Together, these processes produce lake fish faunas with highly variable composition, but with diversities that are well predicted by environmental variables.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Aquatic Ecology
08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE)

UniBE Contributor:

Wagner, Catherine and Seehausen, Ole

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

1461-023X

Publisher:

Wiley-Blackwell Publishing

Language:

English

Submitter:

Marcel Häsler

Date Deposited:

31 Mar 2014 15:27

Last Modified:

14 Jul 2015 08:23

Publisher DOI:

10.1111/ele.12260

BORIS DOI:

10.7892/boris.45862

URI:

https://boris.unibe.ch/id/eprint/45862

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