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Macroecologia de mamíferos neotropicais com ocorrência no Cerrado

Macroecology of neotropical mammals with occurrence in the brazilian "Cerrado"

Resumo

The macroecological approach has been used recently to analyze correlations between ecological variables in large taxonomic groups, at continental scales. A positive relationship between body weight and geographic range size has been described as a poligonal space envelope form, that can be explained by ecological and evolutionary constraints. However, these variables can be disturbed by spatial and phylogenetic autocorrelation effects. In this work, the relationship between body weight and geographic range size was analyzed for 80 species of Neotropical mammals present in the Brazilian "cerrado". Spatial and taxonomic effects were tested using a linear trend surface analysis and an ANOVA (at level of order), combined in a generalized model. Around 61% of variation in geographic range size and 69% of variation in body weight in mammals of the "cerrado" can be explained simultaneously by spatial and taxonomic effects. The analysis of residuals of the generalized model showed that positive correlation between variables persist even after removing these effects. Thus, variation and covariation of traits in the mammals of the brazilian "cerrado" agree with the general macroecological pattern proposed for another taxonomic groups such as mammals, birds and snakes worldwilde.

Macroecology; "Cerrado" mammals; geographic range size; ecological and evolutionary constraints; spatial and phylogenetic autocorrelation


Macroecology; "Cerrado" mammals; geographic range size; ecological and evolutionary constraints; spatial and phylogenetic autocorrelation

Macroecologia de mamíferos neotropicais com ocorrência no Cerrado

Macroecology of neotropical mammals with occurrence in the brazilian "Cerrado"

Cleiber Marquez VieiraI; José Alexandre Felizola Diniz-FilhoII

IDepartamento de Biologia, Centro de Ciências Exatas e Tecnológicas, Universidade Estadual de Goiás. Caixa Postal 459, 75110-380 Anápolis, Goiás, Brasil. E-mail: cleibermv@uol.com.br

IIDepartamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Goiás. Caixa Postal 131, 74001-970 Goiânia, Goiás, Brasil. E-mail: diniz@icb1.ufg.br

ABSTRACT

The macroecological approach has been used recently to analyze correlations between ecological variables in large taxonomic groups, at continental scales. A positive relationship between body weight and geographic range size has been described as a poligonal space envelope form, that can be explained by ecological and evolutionary constraints. However, these variables can be disturbed by spatial and phylogenetic autocorrelation effects. In this work, the relationship between body weight and geographic range size was analyzed for 80 species of Neotropical mammals present in the Brazilian "cerrado". Spatial and taxonomic effects were tested using a linear trend surface analysis and an ANOVA (at level of order), combined in a generalized model. Around 61% of variation in geographic range size and 69% of variation in body weight in mammals of the "cerrado" can be explained simultaneously by spatial and taxonomic effects. The analysis of residuals of the generalized model showed that positive correlation between variables persist even after removing these effects. Thus, variation and covariation of traits in the mammals of the brazilian "cerrado" agree with the general macroecological pattern proposed for another taxonomic groups such as mammals, birds and snakes worldwilde.

Key words: Macroecology, "Cerrado" mammals, geographic range size, ecological and evolutionary constraints, spatial and phylogenetic autocorrelation

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AGRADECIMENTOS. À Fernanda Silva Bonfim, Leandro Silveira, Anah Tereza de Almeida Jácomo e Carlos Eduardo Ramos de Sant'Ana, pelas valiosas discussões sobre métodos quantitativos em Biologia omparada, Ecologia e Evolução dos mamíferos da américa do Sul. Somos especialmente gratos a Luis Maurício Bini por suas avaliações e sugestões estatísticas e, também aos Professores Dr. Sérgio Furtado dos Reis e Dr. Fabrizio D'Ayala Valva. Nosso programa de pesquisa em Ecologia e Evolução é apoiado pelo CNPq, CAPES, FUNAPE/PRPPG-UFG e UEG.

Recebido em 11.III.1999; aceito em 07.XII.2000.

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Datas de Publicação

  • Publicação nesta coleção
    30 Abr 2009
  • Data do Fascículo
    Dez 2000

Histórico

  • Aceito
    07 Dez 2000
  • Recebido
    11 Mar 1999
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