Elevational differentiation accelerates trait evolution but not speciation rates in Amazonian birds
| Autor: | Vanessa E. Luzuriaga-Aveiga, Jason T. Weir |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
biology Ecology Amazon rainforest Genetic Speciation 010604 marine biology & hydrobiology Amazonian Altitude Biome 010603 evolutionary biology 01 natural sciences Biological Evolution Passerine Ecological speciation Birds Diversification rates Phenotype biology.animal Trait Animals Ecology Evolution Behavior and Systematics Ecosystem Phylogeny |
| Zdroj: | Ecology letters. 22(4) |
| ISSN: | 1461-0248 |
| Popis: | The importance of ecologically mediated divergent selection in accelerating trait evolution has been poorly studied in the most species-rich biome of the planet, the continental Neotropics. We performed macroevolutionary analyses of trait divergence and diversification rates across closely related pairs of Andean and Amazonian passerine birds, to assess whether the difference in elevational range separating species pairs - a proxy for the degree of ecological divergence - influences the speed of trait evolution and diversification rates. We found that elevational differentiation is associated with faster divergence of song frequency, a trait important for pre-mating isolation, and several morphological traits, which may contribute to extrinsic post-mating isolation. However, elevational differentiation did not increase recent speciation rates, possibly due to early bursts of diversification during the uplift of the eastern Andes followed by a slow-down in speciation rate. Our results suggest that ecological differentiation may speed up trait evolution, but not diversification of Neotropical birds. |
| Databáze: | OpenAIRE |
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