Importância da matriz na estrutura de comunidade de besouros carpófilos em paisagem fragmentada

• Autor(a) principal: Araujo, Lucimar Soares de
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3900
• topic: Ecologia de paisagem; Coleoptera; Mata Atlântica; Fragmentação florestal; Hábitat; Landscape ecology; Coleoptera; Mata Atlântica; Forest fragments; Habitat; CNPQ::CIENCIAS BIOLOGICAS::ECOLOGIA

Understand how the distribution and the movement behavior of animals interact with landscape structure to generate patterns of distribution is the main goal of landscape ecology. We assume that the main source of biodiversity of the carpophiles beetles (Coleoptera) in the Zona da Mata (Minas Gerais - Brazil) are the remnants of original vegetation - forest fragments, and that different types of matrix show differences in permeability of this fauna, whether by micro-climatic characteristics that allow the persistence of organisms from the wood, either to differences in the availability of resources, enabling the establishment of these insects in the array. Therefore, we sampled nine forest fragments that were surrounded with the following matrices: three with coffee plantation, three with Eucalyptus plantation and three with pasture. In these environments the beetles were collected and measured the variables to test the hypothesis that resource availability, environmental conditions and habitat heterogeneity are determinants of the distribution of beetles. Carpophile beetles answered to the distance inside the forest differently depending on the type of matrix, but none of the environmental variables explained this response. The abundance of beetles decreases with distance from forest in pasture matrix, and did not change in matrix of the coffee and Eucalyptus plantation. The richness of beetles decreased in pasture matrix, did not change in Eucaliptus plantation matrix, but increased with distance from of the forest in coffee plantation. These patterns are importants for understanding the dynamics of populations that disperse between fragments and thus reduce the chance of extinction and maintain the diversity within the forest fragments. In addition, our results it is impotant to discuss the determinants of the diversity of these insects in agro-forest landscape, evaluating components that operate in the regulation of species in a community marked by human action.