Full text
| |
| Author(s): |
Henrique Batalha Filho
Total Authors: 1
|
| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Biociências (IBIOC/SB) |
| Defense date: | 2012-11-12 |
| Examining board members: |
Cristina Yumi Miyaki;
João Miguel de Barros Alexandrino;
Silvio Shigueo Nihei
|
| Advisor: | Cristina Yumi Miyaki |
| Abstract | |
This PhD Dissertation describes patterns of diversification of species of passerines that occur in the Amazon and the Atlantic Forest and that allowed making inferences on the processes that may have influenced the evolution of the organisms that live in these forests. We generated sequences of mitochondrial and nuclear genes to study the historical biogeography of these biomes. This work includes six chapters. In chapters 1 to 4 we analyzed Basileuterus leucoblepharus, Myrmotherula gularis, and the Synallaxis ruficapilla complex in order to depict the diversification within the Atlantic Forest. These studies revealed that late Pleistocene glacial cycles played an important role on the diversification of these taxa. Furthermore, tectonic activities in the Quaternary may have contributed for the diversification of the S. ruficapilla complex. In chapter 5 we analyzed the Thamnomanes caesius/T. schistogynus complex in order to infer about the diversification in the Amazon. The results of this study showed that both the recent origin of Amazonian rivers (Pliocene to Pleistocene) as glacial cycles could be responsible for the diversification of these organisms. In chapter 6 we analyzed the New World suboscines in order to depict the historical connection dynamics between the Amazon and the Atlantic Forest. Our results pointed to two distinct spatiotemporal pathways connecting these forests in the past: (1) older connections during the Miocene through southern South America dry diagonal; (2) younger connections during the Pliocene to Pleistocene through Cerrado and Caatinga in northeastern Brazil. The results of this PhD Dissertation allowed us to test the role of concurrent hypotheses of diversification in the Amazon and the Atlantic Forest. The riverine hypothesis seems to have contributed to the evolution of the Amazonian biota. The refuge hypothesis seems to be the main force of diversification of organisms from the Atlantic Forest. Moreover, we could not reject the refuge hypothesis as a force of diversification of organisms that occur in the Amazon forest. Tectonic events and climate changes played important roles in the historical connection between the Amazon and the Atlantic Forest (AU) | |
| FAPESP's process: | 08/05705-4 - Phylogeography of forest birds from the Atlantic Forest |
| Grantee: | Henrique Batalha Filho |
| Support Opportunities: | Scholarships in Brazil - Doctorate |