Banca de DEFESA: GIESTA KRISHNA DE SAINT GEORGE

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : GIESTA KRISHNA DE SAINT GEORGE
DATA : 17/05/2018
HORA: 14:00
LOCAL: Laboratório Didático I DECOL
TÍTULO:

Modeling Primate Corridors In The Brazilian Northeast


PALAVRAS-CHAVES:

Calicebus barbarabrownae, Calicebus coimbrai, titi, fragmentation, habitat loss, corridors


PÁGINAS: 30
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
RESUMO:

Fragmentation and loss of habitat associated with anthropic activities are the most cited causes of loss of biological diversity. The reduction of forest habitats results in the isolation of populations and the greater risk of extinction. Arboreal primates are threatened mainly by fragmentation and loss of habitat. In the present study we approached two species of primates: Callicebus coimbrai (Primates, Pitheciidae) is endemic to the Northeastern Atlantic Forest, while Callicebus barbarabrownae endemic to the Caatinga. Both live in fragmented landscapes with high degree of isolation, with distribution in the states of Sergipe and Bahia, northeastern Brazil. The objective of this work was to identify possible connection routes between forest remnants occupied by the species, as well as to model ecological corridors within previously defined priority areas for the conservation of Callicebus coimbrai (Atlantic Forest) and Callicebus barbarabrownae (Caatinga). Corridors were simulated for 12 priority areas for Atlantic Forest and seven for Caatinga. For this, we used images classified as land use (MapBiomas 2016), on which we generate resistance surfaces. Altogether, we simulated 570 corridors, with 30 replicates for each priority area. A total of 74 fragments were identified for connection in priority areas of C. coimbrai and 36 in priority areas of C. barbarabrownae. The greatest coverage of land use in priority areas in the Atlantic Forest was Agriculture or Pasture (60.37%), while in the Caatinga it was Open Forest (52.16%). The total areas of the Caatinga polygons are larger than those of the Atlantic Forest, as well as the number of fragments. However, the density of fragments was higher in the Atlantic Forest, indicating high fragmentation. Ecological corridors were longer in the Caatinga and had lower costs per meter than in the Atlantic Forest. Landscapes in the Caatinga are more permeable to the crossing of the studied species, in relation to the Atlantic Forest. We recommend conservation actions primarily for the species C. barbarabrownae, which is classified as "critically endangered" from extinction. For Callicebus coimbrai we recommend the implementation of stepping stones to reduce the problems related to the low permeability of the matrix to which it is inserted.


MEMBROS DA BANCA:
Presidente - 1549043 - ADRIANA MONTEIRO DE ALMEIDA
Interno - 1718346 - EDUARDO MARTINS VENTICINQUE
Externo à Instituição - LEANDRO JERUSALINSKY - ICMBio
Notícia cadastrada em: 07/05/2018 08:51
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