Pinto, Miriam PlazaLima, Adriana Almeida de2018-05-102018-05-102018-02-23LIMA, Adriana Almeida de. Influência de mudanças climáticas sobre a diversidade Alfa e Beta de primatas da Mata Atlântica. 2018. 68f. Dissertação (Mestrado em Ecologia) - Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, 2018.https://repositorio.ufrn.br/jspui/handle/123456789/25169Changes in Earth's climatic conditions have major impacts on global biodiversity. Such changes, directly and indirectly, affect the geographic distributions of species and consequently cause changes in the patterns of alpha and beta diversity throughout space and time. Climate projections reveal that tropical forests can suffer strong effects from climate change, and together with habitat fragmentation, may further threaten the existence of many species dependent on forest habitats. Changes in primates’ vulnerability may occur as a result of changes in climate, especially in the Atlantic Forest. We investigated how these climate changes, in optimistic and pessimistic scenarios, will influence primate biodiversity patterns in the Atlantic Forest. Specifically: i) where are the largest changes in species richness expected? ii) the spatial pattern of beta diversity will undergo homogenization or heterogenization? and iii) where are the major changes in species composition projected? We compiled records of species occurrence and climatic data to generate current and future climate suitability models of Brazilian Atlantic Forest primates. Using these models, we analyzed the spatial and temporal patterns changes of alpha and beta diversity. Our results indicate previsions, according to climate changes, of richest regions concentrated on the coast of the biome and richness decrease in areas of ecotone. Changes in richness will occur predominantly due to species loss. Communities will be more spatially heterogeneous in the future, with increased beta diversity. The heterogenization may be driven by the reduction species geographic distributions. In the future, ecotone regions, mainly the central Atlantic Forest and the most western region, both in contact with Cerrado, will become more heterogeneous and will undergo greater changes in species composition. The changes in the precipitation regime predicted for these areas may influence the primates diversity directly through physiological tolerances of the organisms, and indirectly, through changes in the forest structure and resources availability. The results should be observed with caution, since there are sources of uncertainties in the projections. Nevertheless, we consider that the changes detected are underestimated because the projections were restricted to the known distribution of the species and the dispersion in the future is extremely compromised by the high loss and fragmentation of habitat in the Atlantic Forest.Acesso AbertoHeterogeneizaçãoDiversidade alfaTurnoverAninhamentomasterThesisCNPQ::CIENCIAS BIOLOGICAS::ECOLOGIA