Fatores ecológicos e evolutivos na organização da diversidade genética de aves no interflúvio Purus-Madeira, Amazônia Ocidental
Phylogeographic studies of Amazonian birds have revealed large intraspecific diversity, even within recognized areas of endemism. To understand the origin and organization of Amazonian diversity, including the influence of recent history and current landscape, we need to evaluate fine scale patte...
| Autor principal: | Souza, Affonso Henrique Nascimento de |
|---|---|
| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
|
| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/11967 http://lattes.cnpq.br/6486611783204721 |
| Resumo: |
|---|
|
Phylogeographic studies of Amazonian birds have revealed large intraspecific diversity,
even within recognized areas of endemism. To understand the origin and organization
of Amazonian diversity, including the influence of recent history and current landscape,
we need to evaluate fine scale patterns of genetic diversity in relation to detailed
environmental information. We studied phylogeography and demographic history of
two understory bird species, Gymnopithys salvini and Lepidothrix coronata, from the
Purus-Madeira interfluvium, within the Inambari area of endemism using mtDNA and
nuclear markers with dense sampling. The Purus River was found to be a geographic
barrier for both species. Both species showed signs of recent population expansion and
had no genetic structure within the interfluvium, which includes two distinct vegetaion
types and geological formations. This result is probably due to a dynamic geological
history and recent occupation of the landscape by current populations, suggesting that
biogeographic history is a better predictor of the pattern of bird genetic diversity within
the Purus-Madeira interfluvium than the current environmental heterogeneity. We also
show further evidence for the need to evaluate the existence of independent
evolutionary lineages of understory upland forest birds within traditionally defined
areas of endemism in Amazonia. |