Banca de QUALIFICAÇÃO: GIESTA KRISHNA DE SAINT GEORGE

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : GIESTA KRISHNA DE SAINT GEORGE
DATA : 23/10/2017
HORA: 14:30
LOCAL: Sala de reuniões prédio de ecologia
TÍTULO:

Connecting primate habitats in Atlantic Forest and Caatinga of Northeast areas of Brazil


PALAVRAS-CHAVES:

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


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

Fragmentation and habitat loss 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. The species Callicebus coimbrai is endemic to the Northeastern Atlantic Forest, while Callicebus barbarabrownae endemic to the Caatinga. Both with distribution in the states of Sergipe and Bahia, live in fragmented landscapes and with high isolation. One of the most viable conservation strategies for these primates is the creation of ecological corridors. The objective of the present study was to characterize the land use and landscape structure in polygons of priority areas for conservation of the two species, and to identify possible routes of connection between fragments. The priority areas polygons were defined by experts at a workshop at the Centro Nacional de Pesquisa e Conservação de Primatas Brasileiros in 2016. Land use classifications were obtained from MapBiomas 2016 collection 2 images, summarized to 5 classes. The occurrence points of the species were obtained in publications and data not published in the last 10 years. The corridors were simulated by connecting fragments with occurrence of the species or between large fragments with potential reintroduction. To this end, we simulate ecological corridors through the least cost path analysis algorithms and multiple paths. For C. coimbrai, 12 polygons of priority areas were analyzed, with a total area of 56,409 hectares, which 13,840ha (24.5%) is forest cover, and 36,215ha (64.2%) of Agriculture or Pasture. We simulated 94 corridors with an average of 6.3 corridors per priority area. The lowest cost corridor had length of 1,377m, while the highest cost, 8,533m. Corridors had an average length of 9,112.78m (+7,172.26; n = 94). Of the six least cost corridors, only one had length near Euclidean Distance, indicating more linear corridors. For C. barbarabrownae, seven polygons of priority areas were analyzed, with a total area of 46,399 hectares, which 8,271ha (17.8%) of the area covered by Arboreal Caatinga and 14,240ha (30.7%) of Agriculture or Pasture. They were simulated 54 runners with an average of 7.7 runners for each area. The lowest cost corridor had length of 5,521m, while the highest cost, 15,574m. Corridors had a mean length of 21,122.11 m (+6,470.69; n = 54). No corridor obtained length near the Euclidean distance, indicating more sinuous corridors. The best corridor simulations occurred in few priority areas, since these are dependent on the presence of remaining vegetation cover. The lower cost values do not necessarily correspond to smaller distances, since the route is a consequence of the matrix permeability. With the information generated in this work, we hoped to support the "Plano de Ação Nacional Para a Conservação dos Primatas do Nordeste ", of the Ministry of the Environment, whose objective is to increase the area and connectivity of the habitats of endangered species to ensure population viability.


MEMBROS DA BANCA:
Presidente - 1549043 - ADRIANA MONTEIRO DE ALMEIDA
Externo à Instituição - MARÍLIA BRUZZI LION - UFRN
Interno - 1914239 - MIRIAM PLAZA PINTO
Notícia cadastrada em: 06/10/2017 15:20
SIGAA | Superintendência de Tecnologia da Informação - (84) 3342 2210 | Copyright © 2006-2024 - UFRN - sigaa07-producao.info.ufrn.br.sigaa07-producao