Análise fitossociológica de uma floresta situada em Curuá-Una – Pará.

Abstract

This phytosociological study was made to investigate the structure of a forest situated in Curuá-Una — PA, Brazil. A forest census was made in an area of 100 hectares in which all trees with DBH equal or greater than 45cm were measured. The trees with DBH <45cm were measured in 40 plots of 250m x 10m. A forest evaluation on the basis of floristic composition and phytosociological parameters was made. The families with higher importance value index (IVI) inside the class of DBH 10 to 45cm were: Violaceae, Burseraceae, Sapotaceae and Caesalpiniaceae. The familie Bombacaceae, Malphygiaceae, Ebenaceae, Verbenaceae, Myrtaceae, Monimiaceac and Ramnaceae, presented only one tree inthis class of DBH. The vegetation with DBH > 45cm presented the families Quinaceae, Araliaceae, Rubiaceae, Simarubaceae, Vochsiaceal, Celastraceae and Lecythidaceae as more abundants. The specie Tetragastris panamensis was found in all sample units (100% of absolute frequency) into the population with DBH <45cm. Manilkara huberi, Goupia glabra, Hymenolobium traeum, Caryocar villosum and Vochysia maxima were the most important species in the forest by the high Jundance in the area.