Use este identificador para citar ou linkar para este item: http://repositorio.bc.ufg.br/handle/ri/11736
Tipo do documento: Artigo
Título: Macroevolutionary dynamics in environmental space and the latitudinal diversity gradient in new world birds
Autor: Diniz Filho, José Alexandre Felizola
Rangel, Thiago Fernando Lopes do Valle de Britto
Bini, Luis Mauricio
Hawkins, Bradford Alan
Abstract: Correlations between species richness and climate suggest non-random occupation of environmental space and niche evolution through time. However, the evolutionary mechanisms involved remain unresolved. Here, we partition the occupation of environmental space into intra- and inter-clade components to differentiate a model based on pure conservation of ancestral niches with higher diversification rates in the tropics, and an adaptive radiation model based on shifts in adaptive peaks at the family level allowing occupation of temperate regions. We examined these mechanisms using within- and among-family skewness components based on centroids of 3560 New World bird species across four environmental variables. We found that the accumulation of species in the tropics is a result of both processes. The components of adaptive radiation have family level skewness of species’ distributions strongly structured in space, but not phylogenetically, according to the integrated analyses of spatial filters and phylogenetic eigenvectors. Moreover, stronger radiation components were found for energy variables, which are often used to argue for direct climatic effects on diversity. Thus, the correspondence between diversity and climate may be due to the conservation of ancestral tropical niches coupled with repeated broad shifts in adaptive peaks during birds’ evolutionary history more than by higher diversification rates driven by more energy in the tropics.
Palavras-chave: Bird richness
Bioclimatic envelope
Environmental space
Latitudinal gradients
Macroevolution
Niche conservatism
País: Gra-bretanha
Instituição: The Royal Society Publishing
Unidade acadêmica: Instituto de Ciências Biológicas - ICB (RG)
Citação: DINIZ FILHO, José Alexandre Felizola; RANGEL, Thiago Fernando L. V. B.; BINI, Luis Mauricio; HAWKINS, Bradford A. Macroevolutionary dynamics in environmental space and the latitudinal diversity gradient in new world birds. Proceedings of the Royal Society of London. Biological Sciences, Londres, v. 274, n. 1606, p. 43-52, Jan. 2007.
Tipo de acesso: Acesso Aberto
Identificador do documento: 10.1098/rspb.2006.3712
Identificador do documento: 10.1098/rspb.2006.3712
URI: http://repositorio.bc.ufg.br/handle/ri/11736
Data de publicação: Jan-2007
Aparece nas coleções:ICB - Artigos publicados em periódicos

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