This paper aimed to analyze the natural regeneration structure of an exploited low floodplain forest located at EMAPA forestlands, Afuá County, in northern Pará. Sampling was accomplished in 25 sub-plots of 100 m². In each sub-plot of 100m², all individuals with height (h) <FONT FACE=Symbol>³</FONT> 0.30 m and diameter at 1,30m above ground level (DBH) <FONT FACE=Symbol>£</FONT> 15.0 cm were surveyed and were botanically identified, as well as all the plants with (h) <FONT FACE=Symbol>³</FONT> 3.0 m and diameter at 1.30 m above ground level (DBH) < 15.0 cm. A total of 13.380 individuals/ha distributed in 63 species, 51 genera and 23 botanical families were sampled. The most important species of the phytocenosis were: Euterpe oleracea, Astrocaryum murumuru, Crudia bracteata, Gustavia augusta and Inga edulis. Over 60% of the species studied in the area showed a clustering distribution pattern and a Shannon-Weaver index (H´) of 3.05.
Phytosociology; floodplain forest; Amazonia
