| Texto completo | |
| Autor(es): |
Ritter, Camila D.
[1, 2]
;
Ribas, Camila C.
[3]
;
Menger, Juliana
[3]
;
Borges, Sergio H.
[4]
;
Bacon, Christine D.
[5, 6]
;
Metzger, Jean P.
[7]
;
Bates, John
[8]
;
Cornelius, Cintia
[4]
Número total de Autores: 8
|
| Afiliação do(s) autor(es): | [1] Univ Duisburg Essen, Dept Eukaryot Microbiol, Univ Str 5, D-45141 Essen - Germany
[2] Univ Fed Parana, Dept Zootecnia, Grp Integrado Aquicultura & Estudos Ambientais, Rua Funcionarios 1540, BR-80035050 Curitiba, Parana - Brazil
[3] Inst Nacl de Pesquisas da Amazonia, Coordenacao Biodiversidade & Colecoes Zool, Av Andre Araujo 2936, BR-69060001 Manaus, Amazonas - Brazil
[4] Univ Fed Amazonas, Inst Ciencias Biol, Av Rodrigo Otavio Jordao Ramos 3000, Bloco ICB01, BR-69077000 Manaus, Amazonas - Brazil
[5] Gothenburg Global Biodivers Ctr, Box 461, S-40530 Gothenburg - Sweden
[6] Univ Gothenburg, Dept Biol & Environm Sci, Box 463, S-40530 Gothenburg - Sweden
[7] Univ Sao Paulo, Inst Biociencias, Dept Ecol, Rua Matao 321, Travessa 14, BR-05508900 Sao Paulo, SP - Brazil
[8] Field Museum Nat Hist, Negaunee Integrat Res Ctr, Life Sci Sect, 1400 S Lake Shore Dr, Chicago, IL 60605 - USA
Número total de Afiliações: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | LANDSCAPE ECOLOGY; v. 36, n. 9, p. 2565-2582, SEP 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
Context Amazonian white-sand ecosystems (campinas) are open vegetation patches which form a natural island-like system in a matrix of tropical rainforest. Due to a clear distinction from the surrounding matrix, the spatial characteristics of campina patches may affect the genetic diversity and composition of their specialized organisms, such as the small and endemic passerine Elaenia ruficeps. Objectives To estimate the relative contribution of the current extension, configuration and geographical context of campina patches to the patterns of genetic diversity and population structure of E. ruficeps. Methods We sampled individuals of E. ruficeps from three landscapes in central Amazonia with contrasting campina spatial distribution, from landscapes with large and connected patches to landscapes with small and isolated patches. We estimated population structure, genetic diversity, and contemporary and historical migration within and among the three landscapes and used landscape metrics as predictor variables. Furthermore, we estimated genetic isolation by distance and resistance within landscapes. Results We identified three genetically distinct populations with asymmetrical gene flow among landscapes and a decreasing migration rate with distance. Within each landscape, we found low differentiation without genetic isolation by distance nor by resistance. In contrast, we found differentiation and spatial correlation between landscapes. Conclusions Together with previous studies, the population dynamics of E. ruficeps suggests that both regional context and landscape structure shape the connectivity among populations of campina specialist birds. Also, the spatial distribution of Amazonian landscapes, together with their associated biota, has changed in response to climatic changes in the Late Pleistocene. (AU) | |
| Processo FAPESP: | 09/53365-0 - Áreas de vegetação aberta e ciclos climáticos na Amazônia Central: padrões de genética da paisagem como indicadores do fluxo gênico atual em uma paisagem naturalmente fragmentada |
| Beneficiário: | Jean Paul Walter Metzger |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |