Banca de QUALIFICAÇÃO: BIANCA VILLAR CARVALHO GUERREIRO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : BIANCA VILLAR CARVALHO GUERREIRO
DATE: 25/09/2023
TIME: 09:00
LOCAL: Sala de Reuniões (DECOL)
TITLE:

Landscape attributes effects on the blond titi monkey (Callicebus barbarabrownae, Hershkovitz 1990)

KEY WORDS:

Landscape Composition; Landscape Configuration; Endemic Species; Habitat Loss; Land Use and Land Cover Change.

PAGES: 63
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Habitat loss and fragmentation, exacerbated by the expansion of human activities, are currently the greatest threats to biodiversity. Forest-dependent species such as neotropical primates are among the most vulnerable to these changes. The blond titi monkey (Callicebus barbarabrownae) is a medium-sized primate endemic to the Caatinga and currently classified as Critically Endangered. As C. barbarabrownae is a forest-dependent frugivorous primate, it is strongly threatened by habitat loss. This master thesis is divided into two chapters. In the first chapter, we investigate the spatial patterns and temporal changes in land use and land cover (LULC) classes within the geographic range of C. barbarabrownae and in landscapes with records (presence and absence) of this species. We found that more than half of the geographic range of C. barbarabrownae's is covered by Farming and Non-Vegetated Areas, with Pasture being the predominant class. In landscapes with records of the species, the predominant classes were Savanna Formation, Pasture, Mosaic of Uses, and Forest Formation. Both currently and in the years of the records, Pasture had a higher proportion of coverage in occurrence landscapes than in those of absence, and it is also the class with the highest increase rate over the evaluated 37 years. Our results suggest that extensive livestock farming is currently the greatest threat to C. barbarabrownae. Although the species occurs in contexts of limited habitat availability, this persistence may be considered an extinction debt that has not yet been paid. Restoration efforts and the creation of Protected Areas, especially in the northeastern portion of its geographic distribution, can be crucial allies for the conservation of this primate. In the second chapter, we are investigating the effects of landscape structural attributes on the occurrence and density of C. barbarabrownae. We conducted four field campaigns in the states of Sergipe and Bahia, with the fifth campaign still to be carried out. We collected the density data using the playback technique. So far, we have sampled 19 fragments, which serve as the geographical center for 19 independent landscapes defined by 3000-meter radius buffers. An analysis of the scale of effect will be conducted to determine the landscape scale at which the density and occurrence of these primates respond best to landscape predictor variables. The results of this chapter are still under analysis.

COMMITTEE MEMBERS:
Externo à Instituição - RENATO RICHARD HILÁRIO - UNIFAP
Externa ao Programa - 1549043 - ADRIANA MONTEIRO DE ALMEIDA - nullPresidente - 1914239 - MIRIAM PLAZA PINTO
Externo à Instituição - RAONE BELTRÃO MENDES - UFS