Seasonal rhythms of tropical tree species in contrasting soil conditions in southern Brazil.

AUTOR(ES)

CARDOSO, F. C. G.

FONTE

INTERNATIONAL SYMPOSIUM [OF THE] INTERNATIONAL ASSOCIATION FOR VEGETATION SCIENCE

DATA DE PUBLICAÇÃO

2011

RESUMO

The great variety of phenological patterns in tropical forests must not be explained only by climatic factors. Considering that soil water availability influences plant water status and total metabolism, soil conditions are also expected to be important for the regulation of plant reproductive and vegetative activities over time. Phenological (flushing, leaf fall, flowering and fruiting) and diameter growth (measured with fixed dendrometer bands) data were performed every fifteen days over one year for 120 trees of two tree species (Senna multijuga and Cytharexylum myrianthum) in the Atlantic Forest in Southern Brazil. We investigated if phenological patterns and diameter growth can be distinct in soils contrasting in humidity and nutritional characteristics: Gleisoil (more humidity and poor in nutrients) and Cambisoil (higher drainage and intermediate nutrient values). Each species? phenological patterns were alike and marked by seasonality on the phenophases, in both types of soil. However, the frequency, peak and intensity of the phenophases in the two soil types were distinct. Phenophases were strongly correlated (0.43 < rs < 0.93) with climatic variables (mean temperature and rainfall) and day length, but weakly correlated (0.42

ASSUNTO(S)

espécie arbórea crescimento solo mata atlântica brasil

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