Interactions between forest species as indicative of management and economic possibilities in the Amazon

Abstract

The floodplains of the Amazon estuary are environments recognized for their soils with a high level of water saturation, for the dominance of few tree species and the presence of a high number of palm trees that are important in the maintenance of riverside communities. The objective of this study was to highlight floristic composition and phytosociology as silvicultural tools for sustainable management in floodplain forest. For this, the study was carried out in a floodplain forest located on Conceição Island, Santa Bárbara do Pará, Pará State. Two hectares were randomly selected, divided into two plots of one hectare each, 100 x 100 m, where to facilitate the floristic survey, each hectare was subdivided into strips of 20 x 100 m. In each plot, individuals were sampled at 1.30 m from the ground with a CAP ≥ 30 cm, estimating the commercial height of the timber species; botanical identification was made in the herbarium João Murça Pires - MPEG for some species. The analysis was carried out through the horizontal structure of the forest with the parameters density, frequency, dominance and importance value index, all relative, as well as the number of individuals and basal area. It was found that the species with the highest phytosociological importance value index were Euterpe oleracea, Pterocarpus officinalis, Symphonia globulifera, Hevea brasiliensis, Virola surinamensis and Carapa guianensis, of which E. oleracea stands out as the species of greatest socioeconomic importance followed by Carapa guianensis. The values found regarding the number of individuals, relative density and importance value index, denote that the species, especially those of economic importance, are viable for management to increase production, requiring special management techniques in order to increase their volumes.

DOI:https://doi.org/10.56238/sevened2024.023-026