Análise das estruturas diamétrica e hipsométrica de fragmentos florestais localizados na Bacia do Rio São Francisco, em Minas Gerais, Brasil

Abstract

Diametric and hypsometric structural analysis of native forest fragments localized in the São Francisco river watershed,Minas Gerais, Brazil. The objectivesof this researchwere:(a) to establish the pattern of the diametric and hypsometric frequency distribution; (b) to analyze the distribution adherence (diameter and height), bythe Kolmogorov-Smirnov test;(c) to verify the existence of the structural similarity among fragments, when analyze the diameter and height frequency distributions for the watershed as a whole and among physiognomic groups. This study was carried out in 20 native forest fragments localized in riparian permanent preservation areas along the São Francisco river watershed - Minas Gerais. The groups that showed higher floristic homogeneity have more equilibrium for the diametric and hypsometric distribution pattern. Considering the watershed as a wholethe 190 combinationsformed it was verified that8,95% of the combinations were equal forthe diametric and hypsometric distributions. Therefore, the same diametricdistribution was just 25,26% and 12,10% only for hypsometric distribution, and the majority (53,68%) were not equal for both distributions.