Banca de QUALIFICAÇÃO: MARYANE CHRISTINA SILVA DAMASCENO FERREIRA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : MARYANE CHRISTINA SILVA DAMASCENO FERREIRA
DATA : 03/11/2016
HORA: 08:30
LOCAL: Sala didático I do departamento de ecologia da UFRN
TÍTULO:

Landscape description of three species of the Northeast primates

PALAVRAS-CHAVES:

Fragmentation, Callicebus coimbrai, Callicebus barbarabrownae, Sapajus xanthosternos, Coimbra’s titi, Golden-bellied capuchin.

PÁGINAS: 50
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
RESUMO:

The species Callicebus coimbrai Kobayashi & Langguth (1999) (Coimbra’s titi), Sapajus xanthosternos Wied-Neuwied (1826) (Golden-bellied capuchin), and Callicebus barbarabrownae Hershkovitz (1990) (Northern Bahian blond titi monkey) are three endangered primates from the Northeast region which live in the Atlantic Forest (the former two) and in the Caatinga (the latter two) areas. They are species that live in subgroups that inhabit small fragments. The landscape they inhabit is little known. Therefore, this work aimed to characterize it and analyze how it differs among the three species. To that end, we conducted a bibliographical survey of the already existing occurrence points in the literature from 2000 on, and we delimited the respective areas of occurrence. After that, we made a non-supervised classification (arboreal vegetation (1) and matrix (0)) of the images of vegetation index (NDVI) made available by Hansen et al (2013). On the sequence, landscape metrics were calculated (medium-sized patch, total edge, perimeter/area ratio, shape, dimension, average fractal dimension) for each species. The results of the analyses showed that the fragments of occurrence of C. coimbrai, C. barbarabrownae, S. xanthosternos do not have sufficiently big proportions, in its major part, to keep a minimum viable population for a long term. Besides, they present large irregularities of shape and edge, which increase even more the vulnerability to hunting, to deforestation, to edge effects, and, consequently, to the extinction of those species even in the short term. The analyses of variance showed that the C. barbarabrownae inhabits the smaller and more regular fragments considering the three species, and that there was no difference in the landscape metrics between the S. xanthosternos and C. coimbrai fragments. This reflects the overall picture of the Caatinga and Atlantic Forest in which those primates, in most cases, do not inhabit areas with the minimum requirements needed for each species. Therefore, the scenery of the three species shows to be extremely vulnerable and needy of effective conservation actions, such as the creation of corridors to connect those areas of occurrence according to the characteristics of landscape usage by each species, the creation of more conservation units, and metapopulation management.

MEMBROS DA BANCA:
Presidente - 1549043 - ADRIANA MONTEIRO DE ALMEIDA
Interno - 1914239 - MIRIAM PLAZA PINTO
Externo ao Programa - 704.729.711-15 - MARÍLIA BRUZZI LION - UFRN