Programa de Pós-graduação em Ciências Ambientais
URI Permanente desta comunidade
Navegar
Navegando Programa de Pós-graduação em Ciências Ambientais por Por Orientador "FERREIRA JÚNIOR, Laerte Guimarães"
Agora exibindo 1 - 2 de 2
Resultados por página
Opções de Ordenação
Item Modelagem matemática para seleção de áreas prioritárias para conservação [manuscrito]: métodos, cenários e contribuições para a gestão territorial em Goiás(Universidade Federal de Goiás, 2009-03-22) COUTO, Maria Socorro Duarte da Silva; HALL, Bryon Richard; http://lattes.cnpq.br/9146394846622675; SILVA, Geci José Pereira da; http://lattes.cnpq.br/9174074436425246; FERREIRA JÚNIOR, Laerte Guimarães; http://lattes.cnpq.br/8647270006257055The efforts to minimize the growing loss of habitats and threatens to biodiversity are increasingly based on objective criteria, which allow prioritize areas and species in need of preservation, taking into account the limitations in both natural and economic resources. These criteria are fundamental for the reserve selection and design, mainly at regions severely affected by land use intensification. In particular, the use of mathematical modeling, enabling the identification of more efficient alternatives, is an important subsidy to conservation challenge. Specifically, in this dissertation we present a new approach for the selection of priority areas for conservation, which considers both the quality and ecological feasibility of the remnant vegetation in the Cerrado areas of the State of Goiás, as well as the practical and legal aspects regarding the use of watersheds for territorial management. This proposal, based on a non-linear mathematical model, allows the parameters to vary according to the socialeconomical and environmental interests, thus generating distinct solutions and scenarios. Among the possible outcomes, we highlight as an "optimum" solution, the one with a large number remnant vegetation areas within riparian environments, which serves the purpose of strengthening spatial connectivity and natural corridors. In fact, this model can be used either to promote the conservation of large remnant vegetation patches, as well as to optimize the restoration of degraded areas, mainly in riparian environments, through the generation of alternative spatial patterns aiming at a more efficient connectivity in highly converted areasItem Padrões de distribuições espaciais e temporais de temperatura de superfície no bioma Cerrado: uma análise integrada a partir de dados orbitais de resolução moderada(Universidade Federal de Goiás, 2010-07-12) SANTOS, Nicali Bleyer Ferreira dos; FERREIRA, Nilson Clementino; http://lattes.cnpq.br/6466969611652630; FERREIRA JÚNIOR, Laerte Guimarães; http://lattes.cnpq.br/8647270006257055The occurrence of vegetation is an important factor regarding the maintainance of natural biogeochemical processes. In the Cerrado, the conversion of the vegetative cover into croplands and cultivated pasturelands has induced severe modifications in biophysical variables such as land surface temperatures, highly sensitive to land cover / land use changes. Thus, and aiming at a more complete understanding of the land conversion impacts on the Cerrado biophysical variables, in this study we assessed, through orbital data (MOD 11 product - Land Surface Temperature), the correlation between land occupation and thermal variability, considering 2003 imagery obtained at the beginning and end of the dry season. In particular, we investigated the LST behavior in relation to the major Cerrado land cover classes, as well as its response to the ongoing clearings. Our results confirmed higher temperatures over anthropic areas, as well as significant increases immediately following deforestations.