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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Why is Amazonia a `source' of biodiversity? Climate-mediated dispersal and synchronous speciation across the Andes in an avian group (Tityrinae)

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Autor(es):
Musher, Lukas J. [1, 2] ; Ferreira, Mateus [3] ; Auerbach, Anya L. [4] ; McKay, Jessica [1] ; Cracraft, Joel [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Amer Museum Nat Hist, Dept Ornithol, Cent Pk West, 79th St, New York, NY 10024 - USA
[2] Amer Museum Nat Hist, Richard Gilder Grad Sch, Cent Pk West, 79th St, New York, NY 10024 - USA
[3] INPA, Programa Posgrad Genet Conservacao & Biol Evolut, Manaus, Amazonas - Brazil
[4] Univ Chicago, Dept Biol Sci, Collegiate Div, 1101 East 57th St, Chicago, IL 60637 - USA
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES; v. 286, n. 1900 APR 3 2019.
Citações Web of Science: 0
Resumo

Amazonia is a `source' of biodiversity for other Neotropical ecosystems, but which conditions trigger in situ speciation and emigration is contentious. Three hypotheses for how communities have assembled include (1) a stochastic model wherein chance dispersal events lead to gradual emigration and species accumulation, (2) diversity-dependence wherein successful dispersal events decline through time due to ecological limits, and (3) barrier displacement wherein environmental change facilitates dispersal to other biomes via transient habitat corridors. We sequenced thousands of molecular markers for the Neotropical Tityrinae (Aves) and applied a novel filtering protocol to identify loci with high utility for dated phylogenomics. We used these loci to estimate divergence times and model Tityrinae's evolutionary history. We detected a prominent role for speciation driven by barriers including synchronous speciation across the Andes and found that dispersal increased toward the present. Because diversification was continuous but dispersal was non-random over time, we show that barrier displacement better explains Tityrinae's history than stochasticity or diversity-dependence. We propose that Amazonia is a source of biodiversity because (1) it is a relic of a biome that was once more extensive, (2) environmentally mediated corridors facilitated emigration and (3) constant diversification is attributed to a spatially heterogeneous landscape that is perpetually dynamic through time. (AU)

Processo FAPESP: 12/50260-6 - Estruturação e evolução da biota amazônica e seu ambiente: uma abordagem integrativa
Beneficiário:Lúcia Garcez Lohmann
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Temático