Molecular Phylogeny and Phylogeography of Species of Passeriformes (Aves): historical Biogeography of the neotropical region with emphasis on Atlantic Forest / Filogenia molecular e filogeografia de espécies de passeriformes (Aves): história biogeográfica da região neotropical com ênfase na Floresta Atlântica

AUTOR(ES)

Fernando Mendonça DHorta

DATA DE PUBLICAÇÃO

2009

RESUMO

This work attempts to contribute to the understanding of biogeographic history of the neotropical forest domains, based on studies of inter and intra-specific diversification of birds. For this I sequenced mitochondrial (citb, Nd2 and ND3) and nuclear (Fib7) genes of 102 samples from all Sclerurus species, S. mexicanus, S. rufigularis, S. guatemalensis, S. caudacutus, S. albigularis and S. scansor. For the study of diversification intra Atlantic Forest, I used sequences of the same genes from 86 specimens of S. scansor and 57 of A. leucophthalmus. The analyses involving Sclerurus indicated that the six species are reciprocally monophyletic and that the diversification of the group took place in the last 10 Ma. The origin of the patterns associated with neotropical areas of endemism, on the other hand, is recent, during the Upper Pliocene and Pleistocene. The geographic congruence in lineage distribution associated with incongruity of the relationship between them indicate that distinct evolutionary histories may have shaped similar geographic patterns. Besides, populations associated with distinct regions of the Amazon exhibit different demographic histories. The phylogeographic and historical demographic studies performed with Scleurus scansor and Automolus leucophthalmus show different histories associated with Atlantic Forest. Despite of the congruence on divergence times between these species and their Amazonian sisters, in S. scansor a deep phylogeographic structure was identified, while in A. leucophthalmus no population was observed. From these results I analyzed the biogeographic hypotheses proposed to explain the origins of biodiversity patterns associated to the Neotroical Region and, in particular, to the Atlantic Forest.

ASSUNTO(S)

floresta atlântica historical demography phylogeography neotropical region automolus leucophthalmus demografia histórica sclerurus filogenia filogeografia phylogeny sclerurus região neotropical atlantic forest bird aves automolus leucophthalmus

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