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Heterogeneidade estrutural e diversidade de pequenos mamíferos em um fragmento de mata secundária de Minas Gerais, Brasil

Structural heterogeneity and diversity of small mammals in a secondary forest fragment of Minas Gerais, Brasil

Resumo

The aim is to determine the relationship between the diversity of small mammals and the structural heterogeneity and/or secondary successional stages in an Atlantic forest fragment at Viçosa (Minas Gerais). We used Sherman and hook live traps to sample this fauna, monthly from may 1992 to april 1993 in three areas: an abandoned plantation of Melinis minutiflora (campo) and two distinct forest areas (capoeira and mata). The structural heterogeneity was determined as a function of the presence of dead trees, pioneer species, epiphytes, the distances between trees, the tree height and basal area measured by a modified quadrant sample method (Cottam & Curtis 1945). lt was sampled a total of 340 individuals belonging to 17 species. The homogeneous plantations had the highest diversity (H' = 1,67). Among the two forests stands the less heterogeneous capoeira had similar diversity (H' = 1,19) than the more heterogeneous stand, the mata (H' = 1,13). The unexpected higher diversity and species richness in the more homogeneous habitat may be explained by some hidden factor which decrease the competition for resources in this community.

Community structure; habitat heterogeneity; small mammal diversity


Community structure; habitat heterogeneity; small mammal diversity

Heterogeneidade estrutural e diversidade de pequenos mamíferos em um fragmento de mata secundária de Minas Gerais, Brasil

Structural heterogeneity and diversity of small mammals in a secondary forest fragment of Minas Gerais, Brasil

Adriano Pereira PagliaI; Paulo De Marco JúniorI; Fernando Martins CostaII; Ronaldo Fernandes PereiraII; Gisele LessaII

IDepartamento de Biologia, Setor de Ecologia, Universidade Federal de Viçosa, 36570-000 Viçosa, Minas Gerais, Brasil

IIDepartamento de Biologia Animal, Museu de Zoologia, Universidade Federal de Viçosa, 36570-000 Viçosa, Minas Gerais, Brasil

ABSTRACT

The aim is to determine the relationship between the diversity of small mammals and the structural heterogeneity and/or secondary successional stages in an Atlantic forest fragment at Viçosa (Minas Gerais). We used Sherman and hook live traps to sample this fauna, monthly from may 1992 to april 1993 in three areas: an abandoned plantation of Melinis minutiflora (campo) and two distinct forest areas (capoeira and mata). The structural heterogeneity was determined as a function of the presence of dead trees, pioneer species, epiphytes, the distances between trees, the tree height and basal area measured by a modified quadrant sample method (Cottam & Curtis 1945). lt was sampled a total of 340 individuals belonging to 17 species. The homogeneous plantations had the highest diversity (H' = 1,67). Among the two forests stands the less heterogeneous capoeira had similar diversity (H' = 1,19) than the more heterogeneous stand, the mata (H' = 1,13). The unexpected higher diversity and species richness in the more homogeneous habitat may be explained by some hidden factor which decrease the competition for resources in this community.

Key words: Community structure, habitat heterogeneity, small mammal diversity

Texto completo disponível apenas em PDF.

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AGRADECIMENTOS. Agradecemos aos professores Lucio A. O. Campos, Carlos F. Sperber e Renato Neves Feio, e ao biólogo Júlio Neil C. Louzada pela leitura crítica do manuscrito e sugestões ao trabalho; ao professor Alfredo Langguth e à bióloga Lena Geisse pelo auxílio na identificação do material, à Universidade Federal de Viçosa pelo apoio técnico e aos estagiários do Setor de Ecologia do DBG - UFV pela ajuda nos trabalhos de campo. Com apoio financeiro do CNPq.

Recebido em 25.VIII.1994; aceito em 14.II.1995.

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Datas de Publicação

  • Publicação nesta coleção
    21 Jul 2009
  • Data do Fascículo
    1995

Histórico

  • Aceito
    14 Fev 1995
  • Recebido
    25 Ago 1994
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