期刊
EVOLUTION
卷 64, 期 9, 页码 2731-2745出版社
WILEY
DOI: 10.1111/j.1558-5646.2010.01026.x
关键词
Adaptive radiation; Anolis; density-dependent; diversification; diversity-dependent; macroevolution; niche-filling; ecological saturation
资金
- David Rockefeller Center for Latin American Studies
- Department of Organismic and Evolutionary Biology at Harvard University
- National Science Foundation
- National Evolutionary Synthesis Center
- Division Of Environmental Biology
- Direct For Biological Sciences [0920892, 0808401, 0918975] Funding Source: National Science Foundation
The pace of phenotypic diversification during adaptive radiation should decrease as ecological opportunity declines. We test this prediction using phylogenetic comparative analyses of a wide range of morphological traits in Greater Antillean Anolis lizards. We find that the rate of diversification along two important axes of Anolis radiation-body size and limb dimensions-decreased as opportunity declined, with opportunity quantified either as time elapsed in the radiation or as the diversity of competing anole lineages inferred to have been present on an island at different times in the past. Most previous studies of the ecological opportunity hypothesis have focused on the rate of species diversification; our results provide a complementary perspective, indicating that the rate of phenotypic diversification declines with decreasing opportunity in an adaptive radiation.
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