Diversidade arbórea e microestrutura de habitat para pequenos mamíferos em fragmentos florestais

Abstract

Distribution patterns in the biomes are being modified by direct effects as modification of size and shape of forests, availability of resources, conditions, as well as indirect effects that influence the interactions at different taxonomic levels. Exploratory action on the Cerrado and Atlantic Forest have resulted in the formation of small relict forest fragments inserted in matrix that makes it impossible to seedlings dispersion of vegetation and movement of small mammals hindering the understanding of these distribution patterns.. The situation is even more worrying for ecotone environments between these domains by the lack of information. This study was divided into three parts in which the first aims to contextualize the knowledge of tree diversity in small forest fragments as well as analize how the microhabitat structure influences the small mammals. The second part deepens knowledge of this tree diversity demonstrating the richness, abundance, composition, structure, aspects of beta diversity, functional diversity and the relevance of conserving and manage the small forest fragments. Finally, the third part uses aspects of vegetation associated with abiotivc variables, to explain the microhabitat structure of small mammals and thus elucidate the distribution patterns of fragments smaller than 50 hectares. With these three parts we intend to demonstrate, using tree diversity and small mammals, the real overview of forest fragments that according to assumptions in several scientific articles, showing populations that tend to population vortex, reduction of genetic variability, among other biological aspects resulting in multitaxa extinctions.