Estrutura e dinâmica do componente arbóreo de um fragmento de floresta estacional semidecidual na bacia do Rio Apa, município de Bela Vista - MS

Abstract

This work aims to provide information on the structure, and ecological groups of dispersal of the tree component of a fragment of semideciduous forest in the basin of Rio APA municipality of Bela Vista-MS. For the phytosociological sampling method was used for contiguous plots with an area of 5.200m2, subdivided into 13 plots of 20 x 20m. We sampled all trees with circumference at breast height (CAP) greater than or equal to 15cm. Of each individual were recorded CAP and total height. The phytosociological survey were sampled 705 individuals belonging to 53 species in 28 families. The values found in Shannon's diversity index (H ') and evenness (J') were respectively 2.79 and 0.70, showing that the fragment has a high diversity and heterogeneity. The area has a greater number of species belonging to the ecological group of the initial secondary, which indicates a possible history of disturbance in the area, possibly favored by Sanzone characteristics resulting from a higher brightness of the understorey, which consequently could come to favor species succession in this category. In the fragment studied, the dispersion syndrome was the most frequent zoochory.