Use este identificador para citar ou linkar para este item: http://repositorio.bc.ufg.br/handle/ri/11125
Tipo do documento: Artigo
Título: Climatic history and dispersal ability explain the relative importance of turnover and nestedness components of beta diversity
Autor: Dobrovolski, Ricardo
Melo, Adriano Sanches
Cassemiro, Fernanda A. S.
Diniz Filho, José Alexandre Felizola
Abstract: Aim We tested whether the geographic variation in the proportion of beta diversity attributed to nestedness or turnover components was explained by the effect of past glaciation events. Specifically, we tested the hypothesis that most of the beta diversity in regions retaining ice until recent periods was due to nestedness. Additionally, we tested whether the variation was influenced by thermal tolerance and the dispersal ability of species. Location This study analysed data from the New World. Methods We used presence/absence data for amphibians, birds and mammals of the New World. We calculated beta diversity among each 1° ¥ 1° cell and the adjacent cells using the Sorensen dissimilarity index that expresses the total beta diversity. Furthermore, we partitioned it into turnover and nestedness components. The relative importance of the two latter components was expressed as the proportion of total beta diversity explained by nestedness (bratio). We calculated the correlation between bratio and the time each cell was free of ice since the last glaciation (cell age). To control the effects of spatial autocorrelation, we calculated geographically effective degrees of freedom. Results The proportion of beta diversity attributed to nestedness was negatively correlated with cell age. Moreover, this effect was stronger for amphibians than mammals, and stronger for mammals than birds. Main conclusions Our results are in accordance with the hypothesis that the nestedness component of beta diversity is more important in areas affected by glaciations until recent time. The beta diversity in high latitudes is the result of past extinctions and recent recolonization, which result in higher levels of nestedness. This process is more evident for vertebrates with lower dispersal ability and lower temperature tolerance.
Palavras-chave: Dispersal abilities
Glaciation
Latitudinal gradients
New world
Past climate change
Spatial autocorrelation
Spatial turnover
Temperature tolerance
País: brasil
Programa: Programa de Pós-Graduação em Ecologia e Evolução
Citação: DOBROVOLSKI, Ricardo; MELO, Adriano S.; CASSEMIRO, Fernanda A. S.; DINIZ FILHO, José Alexandre Felizola. Climatic history and dispersal ability explain the relative importance of turnover and nestedness components of beta diversity. Global Ecology and Biogeography, v. 21, p. 191-197, 2012. Disponível em: <http://onlinelibrary.wiley.com/doi/10.1111/j.1466-8238.2011.00671.x/epdf>.
Tipo de acesso: Acesso Aberto
Identificador do documento: 10.1111/j.1466-8238.2011.00671.x
Identificador do documento: 10.1111/j.1466-8238.2011.00671.x
URI: http://repositorio.bc.ufg.br/handle/ri/11125
Data de publicação: Fev-2012
Aparece nas coleções:ICB - Artigos publicados em periódicos

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