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Contenidos con etiqueta morphological convergence .

Replicate radiations in Caribbean frogs

Replicate radiations, the repeated multiplication of species associated with ecological divergence, have attracted much attention and generated as much debate. Due to the few well?studied cases, it remains unclear whether replicate radiations are an exceptional result of evolution or a relatively common example of the power of adaptation by natural selection. The case of Eleutherodactylus frogs is examined here; this group radiated in the Caribbean islands resulting in more than 160 species that occupy very diverse habitats. A time?calibrated phylogeny revealed that these frogs independently diversified on all larger islands producing species that occupy a broad range of microhabitats in different islands. Using phylogenetic comparative methods, we found an association between morphological traits and particular microhabitats, and for most microhabitats detected significant morphological convergence. Results indicate Caribbean Eleutherodactylus are a novel example of replicate radiations, and highlight the predictability of evolutionary processes, as similar ecological opportunities can lead to similar outcomes. informacion[at] Dugo-Cota et al (2019) Ecomorphological convergence in Eleutherodactylus frogs: a case of replicate radiations in the Caribbean. Ecol Lett
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Contenidos con etiqueta morphological convergence .

Evolución replicada en ranas del Caribe

La aparición de especies nuevas tiende a verse como un proceso dominado por el azar y que refleja una historia evolutiva única e irrepetible para cada especie. Las mutaciones que se van acumulando...

Los chacales de Eurasia y de África son dos especies distintas

Los resultados de este estudio demuestran de manera contundente que las poblaciones de chacales de África y Eurasia representan distintos linajes monofiléticos separados por más de un millón de...