Estudo da diversidade de espécies de uma floresta situada em Curuá-Una – Pará.

Abstract

The tropical forest contain a large diversity of tree species. The studies about the diversity of this species are very important, because offer qualitative and quantitative informations about these forests. These informations when associated with a fitossociologicals studies, benefits a sustainable exploration of forests resources these arcas. Thus, this research has the objective to study the diversity of the species that occurs in 100 hectares of the forest located in Experimental Station of the Curuá-Una (Santarém - Pará). This area belongs to forest management project of the SUDAM in accord with FCAP. These studies were made in two levels of the investigations: in the firts, was evaluated the trees with 10cm<DBH<45cm, utilizing 40 plots, each one with 0,25 ha. In the second level, was made a forest census for the trees with DBH>45cm. It was found 3309 trees with DBH>10cm, being 1 726 trees with DBH>45cm and 1 538 with 10cm<DBH<45cm, distributed into 182 species with 43 families. The forest here refered, has a Shannon-Weaver diversity index of 3,860 (larger population) and 3,206 (smaller population) and Simpsom's index of 0,040 and 0,120 respectively. It was conclude through of the homogeneity degree and mixture quotient, that the forest is very heterogeneous.