Floristic and Structure of a terra firme forest located in Iratapuru River Sustainable Development Reserve, Amapá State, Eastern Amazon, Brazil

Abstract

The State of Amapá has 98% of its native forests intact, a high diversity of phytophysionomies and species that still remains unknown to science. The Iratapuru River Sustainable Development Reserve (SDR) is a state conservation unit, which maintains a population of extractive practices. The present study aims to know and record the floristic and structure of part of the tree species of the SDR. Eleven plots of 10x100 meters were delimited in the area next to the banks of the River Jari (53° 06'24 "W and 00° 16'35" N) and inventoried all trees with diameters from 10 cm measured at 1.30 m. A total of 623 individuals trees was identified, 101 species in 32 families were gathered, with total density (TD) of 566.36 individuals/ha, total basal area of 36,192 m²/ha; The area had a marked regenerative capacity with the majority of the individuals represented on smaller diameter classes. Local experts provided various categories of use to the inventoried species, that combined with phytossociological results can provide important indicators on how to use sustainably the local plant resources.