Título :	Variabilidade genética da saíra-amarela (Stilpnia cayana, Aves : Thraupidae) : uma abordagem baseada nos processos e padrões filogeográficos, morfológicos e de modelagem de nicho
Autor :	Duarte, Samira Rezende
Orientador(es)::	Caparroz, Renato
Assunto::	Circum-amazônia Heterogeneidade ambiental Áreas abertas
Fecha de publicación :	4-abr-2022
Data de defesa::	29-sep-2021
Citación :	DUARTE, Samira Rezende. Variabilidade genética da saíra-amarela (Stilpnia cayana, Aves: Thraupidae): uma abordagem baseada nos processos e padrões filogeográficos, morfológicos e de modelagem de nicho. 2021. 144 f., il. Tese (Doutorado em Biologia Animal) — Universidade de Brasília, Brasília, 2021.
Abstract:	The study of the distribution patterns of a species can provide important information to understand the ecological and evolutionary mechanisms that favored its permanence in a given environment. A distinct pattern is that of the circum-Amazonian species, and the processes that gave rise to this pattern are not entirely clear. Thus, the main objective of this work was to use the morphological, genetic and ecological niche modeling databases of the species Stilpnia cayanato determine the existence of continuity between the southern and northern Amazonian populations. In addition to evaluating the congruence between the morphological pattern and the neutral genetic structure. Based on a mitochondrial and nuclear marker we evaluated the hypothesis of Quaternaryoscillations and climatic stability, isolation by distance in establishing the current distribution of S. cayanaand whether the phylogeographic structure can be related to morphological variation with identification of diagnostic characters for each population.The results found for niche modeling indicate that there was a retraction of the suitability area in the LGM and an expansion of them by the Holocene, however these oscillations were not decisive for the current genetic diversity.Genetically demonstrate that populations have a strong population structure, with a K=3 by the analysis of mixture with Baps, the neutrality tests showed that populations experienced deviations with recent expansion, while the effective size was constant over time. The first divergence event occurred approximately 201thousandyears ago and separated the northern (Cayana) and southern (Flava) lineages of the Amazon that do not share haplotypes with each other and have a migration rate very close to zero, the second diversification event separated the Bolivia from Cayana approximately 139 thousand years ago, later 37thousand years ago it diverged from CayanaS and CayanaN, and the most recent event separated Chloroptera from Flava approximately 13thousandyears ago.The population of Bolivia draws attention, as it shares the plumage pattern of the Flava group and a phylogenetic relationship with the Cayana group.From the morphology, no diagnostic character was found for both sexes for each population or subspecies, being a pattern of clinal plumage; however, both plumage and morphometry support two groups (north and south).Thus, our results indicate two groups, supporting the classification into distinct species with recent divergence, being considered Stilpnia cayanaand Stilpnia flava.
metadata.dc.description.unidade:	Instituto de Ciências Biológicas (IB)
Descripción :	Tese (doutorado) — Universidade de Brasília, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Biologia Animal, 2021.
metadata.dc.description.ppg:	Programa de Pós-Graduação em Biologia Animal
Licença::	A concessão da licença deste item refere-se ao termo de autorização impresso assinado pelo autor com as seguintes condições:Na qualidade de titular dos direitos de autor da publicação, autorizo a Universidade de Brasília e o IBICT a disponibilizar por meio dos sites www.bce.unb.br, www.ibict.br, http://hercules.vtls.com/cgi-bin/ndltd/chameleon?lng=pt&skin=ndltd sem ressarcimento dos direitos autorais, de acordo com a Lei nº 9610/98, o texto integral da obra disponibilizada, conforme permissões assinaladas, para fins de leitura, impressão e/ou download, a título de divulgação da produção científica brasileira, a partir desta data.
Agência financiadora:	Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) e Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq).
Aparece en las colecciones:	Teses, dissertações e produtos pós-doutorado

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