Niche lability in the evolution of a Caribbean lizard community

Jonathan B. Losos, Manuel Leal, Richard E. Glor, Kevin De Queiroz, Paul E. Hertz, Lourdes Rodríguez Schettino, Ada Chamizo Lara, Todd R. Jackman, Allan Larson

Research output: Contribution to journalArticlepeer-review

260 Scopus citations


Niche conservatism - the tendency for closely related species to be ecologically similar - is widespread. However, most studies compare closely related taxa that occur in allopatry; in sympatry, the stabilizing forces that promote niche conservatism, and thus inhibit niche shifts, may be countered by natural selection favouring ecological divergence to minimize the intensity of interspecific interactions. Consequently, the relative importance of niche conservatism versus niche divergence in determining community structure has received little attention. Here, we examine a tropical lizard community in which species have a long evolutionary history of ecological interaction. We find that evolutionary divergence overcomes niche conservatism: closely related species are no more ecologically similar than expected by random divergence and some distantly related species are ecologically similar, leading to a community in which the relationship between ecological similarity and phylogenetic relatedness is very weak. Despite this lack of niche conservatism, the ecological structuring of the community has a phylogenetic component: niche complementarity only occurs among distantly related species, which suggests that the strength of ecological interactions among species may be related to phylogeny, but it is not necessarily the most closely related species that interact most strongly.

Original languageEnglish
Pages (from-to)542-545
Number of pages4
Issue number6948
StatePublished - Jul 31 2003


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