Banca de DEFESA: MARYANE CHRISTINA SILVA DAMASCENO FERREIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : MARYANE CHRISTINA SILVA DAMASCENO FERREIRA
DATA : 15/05/2017
HORA: 14:00
LOCAL: Laboratório didático I
TÍTULO:

The influence of the fragmentation in the occurrence of neotropical primates in risk of extinction in Brazil

PALAVRAS-CHAVES:

Callicebus barbarabrownae, Callicebus coimbrai, Sapajus xanthosternos, Cebidae, Pitheciidae, Mata Atlântica, Caatinga, Conservation.

PÁGINAS: 59
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
RESUMO:

The species of Brazilian primates Callicebus barbarabrownae, Callicebus coimbrai e Sapajus xanthosternos are at risk of extinction. One of the causes of this scenario is the fragmentation of the areas of occurrence of these species in the Caatinga and Mata Atlântica. This study has as objective characterize the fragments with occurrence to each one of these three species, as well compare them with a) remaining presence in the landscape where each species is inserted; b) compare the three species about the characteristics of the fragments where they inhabit, considering the inherent differences between each species and each biome. To generate the forest fragments of the distribution area of each species and identify fragments with confirmed presence it was utilized records of occurrence of the species and images of satellite of the Normalized Difference Vegetation Index (NDVI) shared by Hansen at al (2013). To characterize the fragments were utilized several metrics of the landscape. These three species of primates usually occurred in small, regular and with complex borders fragments. However, when it was compared with their respective distribution areas, the three studied species usually occurred in fragments with bigger area and more complex borders, demonstrating that these primates do not occur by coincidence. To C. coimbrai the size of the nearest neighboring fragment showed as more important than isolation. Their fragments with occurrence have bigger rate of proximity than the fragments of the area of the distribution, what infer in a bigger presence of fragments in the matrix. Among the analyzed characteristics of the fragments, the form (perimeter/area and complexity of the border) was the most determined in the occurrence of these three species of primates in fragmented environments. After the form, the most important explanatory variables were area and isolation (to C. coimbrai). When the there species were compared, it was observed that C. barbarabrownae had inhabited smaller and more regular areas, with less complex borders and more isolated than other two species, possibly because of its inhabitation in Caatinga, when the other two species predominately or just occurred in Mata Atlântica. Callicebus coimbrai and S. xanthosternos showed fragments with similar occurrence about their characteristics of form and isolation, possibly because they have inhabited the same over-fragmented habitat despite that they have differences not only in the use, as in the requirement of resources. Thus, it was concluded that these three primates require emergency measures of conservation that consider the characteristics that determine the occurrence of these species and promote the protection, restoration, and connectivity of the areas with the occurrence of these species of primates.

MEMBROS DA BANCA:
Presidente - 1549043 - ADRIANA MONTEIRO DE ALMEIDA
Externo à Instituição - LEANDRO JERUSALINSKY - ICMBio
Externo ao Programa - 1451741 - MARCIO ZIKAN CARDOSO