Efeitos dos climas atual e histórico no padrão desconstruído de riqueza de espécies arbóreas na região neotropical
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Data
2013-06
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Resumo
The purpose of this study was to investigate the importance of present and historical climate
as determinants of current species richness pattern of forestry trees in South America. The study predicted
the distribution of 217 tree species using Maxent models, and calculated the potential species richness
pattern, which was further deconstructed based on range sizes and modeled against current and historical
climates predictors using Geographically Weighted Regressions (GWR) analyses. The current climate
explains more of the wide-ranging species richness patterns than that of the narrow-ranging species, while
the historical climate explained an equally small amount of variance for both narrow-and-wide ranging tree
species richness patterns. The richness deconstruction based on range size revealed that the influences of
current and historical climate hypotheses underlying patterns in South American tree species richness
differ from those found in the Northern Hemisphere. Notably, the historical climate appears to be an
important determinant of richness only in regions with marked climate changes and proved Pleistocenic
refuges, while the current climate predicts the species richness across those Neotropical regions, with nonevident
refuges in the Last Glacial Maximum. Thus, this study's analyses show that these climate
hypotheses are complementary to explain the South American tree species richness.
Descrição
v. 35, n. 2, p. 219-231, 2013.
Palavras-chave
Mudanças climáticas, Refúgios glaciais, Disponibilidade hídrico-energética, Análise GWR, Não-estacionaridade espacial, Climate changes, Glacial refuges, Water-energy availability, GWR analysis, Spatial non-stationarity
Citação
LIMA-RIBEIRO, Matheus de Souza; FALEIRO, Frederico Valtuille; SILVA, Daniel Paiva. Current and historical climate signatures to deconstructed tree species richness pattern in South America. Acta Scientiarum. Biological Sciences, v. 35, n. 2, p. 219-231, 2013. Disponível em: <http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/14202>.