Demografia de comunidades florestais com predomíno da Dodonaea viscosa Jacq.

Abstract

A gradual increase of the areas abandoned for the farming one is occurring. These areas are occupied for a arboreal vegetation with a strong presence of pioneers species. This study was accomplished in the city of Encruzilhada do Sul, in abandoned areas that present forestry communities in initial to medium training of regeneration, with predominance of Dodonaea viscosa Jacq. on vegetation. The purpose was to characterize these natural populations, aiming at to supply subsidies to the forestry management of Dodonaea viscosa Jacq. For this, it was accomplished the floristic and structural analysis of the population, as well as, some parameters like heating value and macronutrients of wood. To the structural analysis 52 sub-parcels were installed and to the study of heating value, specific mass and constituents of wood 13 trees were cut down, of which disks were collected. The fragment is composed for a small number of species based basically in species of pioneering habit, without indications of the forest to be converging to a more advanced sucessional training. The species presents a high energetic production, with raised carbon text in the wood, what it leads to the use of the forest in the payment for environmental services. The nutrients present in the wood indicate that the exploration of the species can have consequences in mid-term and long-term, having to be considered in the planning of the activities.