Banca de QUALIFICAÇÃO: MAURÍCIO DÁLIA NETO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : MAURÍCIO DÁLIA NETO
DATA : 19/10/2017
HORA: 14:00
LOCAL: PoP-RN no Centro de Convivência da UFRN
TÍTULO:

Species richness, evolutionary history and functional traits: relationships between the diversity geographic patterns of Caatinga birds.


PALAVRAS-CHAVES:

diversity, birds, Caatinga, species richness, phylogeny, functional


PÁGINAS: 29
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
RESUMO:

The species richnes, even though it is not a good predictor for other diversity indices, still the most used for communities characterization and prioritization of conservation.Indices such as phylogenetic and functional diversity, for example, rescue evolutionary history or phylogenetic differences and ecological functions associated with communities better than the richness of species. In addition, analyzing communities from a local perspective (alpha component) and between communities (beta component) provide more information on how different types of diversity can be distributed geographically. Thus, analyzing multifacetes of diversity is the interest to understand the biology of species and the drivers of their geographical patterns. However, few works were developed in the Neotropical regions. With this, we aim to describe the geographic patterns of the richness, evolutionary history, phylogenetic and functional differences of birds in the Caatinga, in the alpha and beta components of diversity. Also investigate the spatial scale (grain) and phylogenetic sources and their influence on the type of result. For this, we used the BirdLife distributions and selected 405 species.Phylogenetic information was collected from the online BirdTree database and the functional data from the EltonTrait. The richness of species was generated from the number of species present in each grid. The values for beta diversity were generated from the species turnover. Phylogenetic diversity was measured from two metrics: the sum of the branches of phylogeny to represent the amount of evolutionary history in the community and the mean phylogenetic distance (MPD) among the taxa to measure phylogenetic differences. Since the metrics to measure functional diversity resemble phylogenetic measures, we use MPD. Comparing the results of the correlations between the different scales (1º, 0,5º and 0,25º) and different phylogenetic topologies, we identified that these differences do not interfere on result. Contrary to expected, species richness does not correlate with other types of measured diversity. In addition, the number of differences in the composition of communities does not contribute to the increase of ecological processes. Por outro lado, devido o alto valor de correlação entre o turnover de espécies e a história evolutiva no componente beta, provavelmente a montagem das comunidades é ocasionada por processos históricos mais antigos. With this, the best understanding of how the multifacetes of diversity helps in choosing representative indices or areas that hold higher values of the various types of diversity at the same time, improving the strategies chosen for the prioritization of conservation.

 


MEMBROS DA BANCA:
Interno - 1718346 - EDUARDO MARTINS VENTICINQUE
Presidente - 1914239 - MIRIAM PLAZA PINTO
Externo à Instituição - Marcos Figueiredo - UNIRIO
Notícia cadastrada em: 20/09/2017 16:08
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