Phytosociology of a permanent preservation area in east of Amazon: indication of species for recovering altered areas.

Abstract

This paper presents the phytosociology of a fragment of a dense ombrophilic forest with 84ha in Northeastern Pará state in trees with DBH ³ 20cm. The species were classified in ecological groups in function of light demand and commercial use. The sampling was composed by 12 random 1ha plots and divided in 100 subplots of 10m ´ 10m. It was recorded 2,326 individuals in 158 species, 107 genera and, 43 families. The families Fabaceae and Lecythidaceae had the highest richness and density in the floristic composition of the area. The first family presents the highest number of species (41) and the second, the highest number of individuals (609), and both of them present high dominance and frequency. As regards to the ecological groups, the species shade tolerant were majority (63.29 %) while in the economic use, the commercial species predominated (41.15 %). It suggests that species with high ecological importance and commercial interest be used for altered area recovering. Around sampled species, some of them are most important such as Pouteria heterosepala, Eschweilera amazonica, Eschweilera blanchetiana, Protium apiculatum, Guatteria poeppigiana, Sterculia pilosa, Inga brevialata and Licania heteromorpha. However, before any kind of investment it must get safe informations about ecology and silviculture of these species.