A utilização da paisagem fragmentada por mamíferos de médio e grande porte e sua relação com a massa corporal na região do entorno de Aruanã, Goiás / The use of landscape fragmented by mammals of medium and large size and its relationship with body mass in the area surrounding the Arowana, Goiás

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

The species are behaving differently to the process of fragmentation and this behavior will depend on the relationship between behavioral, morphological and ecological traits with the physical attributes of the landscape. The body size is a major ecological factors and some links are made between the size and dispersal ability, capacity for perception of the environment and likelihood of occurrence. In this way, the objective was evaluate as is the distribution of mammals in fragmented landscape of Aruanã, Goiás, Brazil testing the following hypotheses: 1) Fragments larger and less isolated have high species richness, 2) species of greater body mass are less affected by fragmentation due to greater dispersal ability; 3) species of greater body mass are distributed more homogeneous in the landscape. We recorded 19 species of mammals, the area but not isolation, was a significant predictor to explain variation in species richness of mammals with larger areas being richer than smaller areas. Large species like jaguar and puma, red brocket deer and gray brocket deer, collared peccary, ocelot and agouti were sensitive to the effect of the area and therefore the effect of fragmentation, which is not confirmed the second hypothesis. However, these species were not restricted only to larger areas, being found also in small fragments used as a temporary source of resources. The puma was the only species that showed significant incidence-isolation relationships. There was no pattern of a homogeneous distribution for these species, but for the tapir, with higher body mass recorded, the results were exactly the opposite of what was observed. The minimum area estimated that 50% or more of the populations of sensitive species occurs in fragmented landscape was 520 hectares. These results reinforce the importance of maintaining forest fragments, almost all belonging to private lands in the conservation of species.

ASSUNTO(S)

habitat fragmentation, mammals, dispersal ability. ecologia fragmentação de habitat, cerrado, mamíferos, habilidade de dispersão.

ACESSO AO ARTIGO

Documentos Relacionados