Estrutura hierárquica na resposta das distribuições geográficas de plantas do Cerrado à mudanças climáticas
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Data
2011-03-27
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Universidade Federal de Goiás
Resumo
The climate can be considered an extremely important factor in vegetation
distribution and its characteristics in a global context. Climate changes affect the
global distribution of vegetation in the distant past and probably will affect in the
future. Spatial distribution models of species (SDMs), also known as niche models
are one of the best current tools for predicting climate-induced changes on the
distribution of species. In general, studies of the consequences of climate changes
on the distribution of biomes include only the geographic distribution of the biome
or the species are analyzed individually. The availability of climatic and ecological
data on a large scale, in addition to more efficient procedures for obtaining data
from geographic information systems, optimization programs and greater
computing power favor the process of modeling the potential distribution, and
broaden the effectiveness of results available by the SDMS. The main objective of
this study is to evaluate whether there is a shift in the hierarchical structure of
future distributions of biome, phytoeeological regions and plants species of the
biome under the effect of climate changes. Consequently, we evaluate some
effects of climate changes on the pattern of species richness and pattern of future
distributions of the biome, phytoeeological regions and species. This study shows
that there is a hierarchical structure in the response of vegetation distribution faces
climate changes predictions for the year 2080 in the Brazilian Cerrado. In general,
in the three scales studied their distributions are moving toward to southeast of
Brazil, thus this region is replaced by a diversity gain while the rest of the local
Cerrado suffers from the impoverishment of their diversity. This study also shows
that in the near future, the Cerrado species will show habitat loss, due to both the
loss of fragments and area reduction of these.
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SOUSA, Nayara Pereira Rezende de. Hierarchical structure in the response of geographic distributions of Cerrado plants to climate change. 2011. 64 f. Dissertação (Mestrado em Ciências Biológicas - Biologia) - Universidade Federal de Goiás, Goiânia, 2011.