Concordant Phylogeographies of 2 Malaria Vectors Attest to Common Spatial and Demographic Histories

Autor(es)

Pedro, Pedro M. ^[1] ; Uezu, Alexandre ^[2] ; Mureb Sallum, Maria Anice ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Saude Publ, BR-01246904 Sao Paulo - Brazil

^[2] Inst Pesquisas Ecol, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF HEREDITY; v. 101, n. 5, p. 618-627, SEP-OCT 2010.
• Citações Web of Science: 13

Resumo

The phylogeography of South American lineages is a topic of heated debate. Although a single process is unlikely to describe entire ecosystems, related species, which incur similar habitat limitations, can inform the history for a subsection of assemblages. We compared the phylogeographic patterns of the cytochrome oxidase I marker from Anopheles triannulatus (N = 72) and previous results for A. darlingi (N = 126) in a broad portion of their South American distributions. Both species share similar population subdivisions, with aggregations northeast of the Amazon River, in southern coastal Brazil and 2 regions in central Brazil. The average (ST) between these groups was 0.39 for A. triannulatus. Populations northeast of the Amazon and in southeastern Brazil are generally reciprocally monophyletic to the remaining groups. Based on these initial analyses, we constructed the a priori hypothesis that the Amazon and regions of high declivity pose geographic barriers to dispersal in these taxa. Mantel tests confirmed that these areas block gene flow for more than 1000 km for both species. The efficacy of these impediments was tested using landscape genetics, which could not reject our a priori hypothesis but did reject simpler scenarios. Results form summary statistics and phylogenetics suggest that both lineages originated in central Amazonia (south of the Amazon River) during the late Pleistocene (579 000 years ago) and that they followed the same paths of expansion into their contemporary distributions. These results may have implications for other species sharing similar ecological limitations but probably are not applicable as a general paradigm of Neotropical biogeography. (AU)

• Processo FAPESP: 05/53973-0 - Sistemática de Anopheles (Nyssorhynchus) (Diptera: Culicidae)
• Beneficiário: Maria Anice Mureb Sallum
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 08/06099-0 - História demográfica, tempo de divergência e taxas de evolução molecular de populações de Anopheles darlingi
• Beneficiário: Pedro Miguel da Costa Pedro
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado