O emprego de técnicas multivariadas na avaliação da estrutura fitossociologica de uma floresta tropical: o caso da estação experimental de Curua-Una - Para-Brasil

Abstract

With the objective to evaluate, using multivariate techniques, the fitossociológica structure of deriving individuals of tropical forests with DAP>45cm, an area of 100 hectares in the Experimental Station of Curuá-Una, located to the right edge of the River Curuá-Una was overcome, tributary of the River Amazon, between the River Tapajós and Xingu, with geographic coordinates 2º23 ' south latitude and 54º24 ' longitude west. Such evaluation was made comparing the deriving results of the area in study with the results gotten previously in a similar area, located in the same Experimental Station) when in the chance the fitossociológica structure for individuals with DAP>5Scm. It was evaluated, initially, Specie/Abundance relation Diametric Distribution, degrees of Association, Space Distribution, Diversity and Uniformity of its individuals. The ordinance of the species was made through an Index of Weighed Importance Value - IWIVp and it was compared with the ordinance made through the combination of the multivaried techniques Principal Components Analysis and Factor Analysis. Finally, in the determination of homogeneous species cluster, the techniques had been used Cluster Analysis and Discriminant Analysis.The results had shown that the two stratums were similar only by Uniformity and Diversity. These results had still shown that the ordinance made through the IWVIp is the ordinance inverse obtained through of the multivariate techniques combination. The Discriminant Analysis confirmed the homogeneous groups gotten by the Cluster Analysis.