Impacto da exploração florestal na estrutura horizontal de millettia stuhlmannii e pterocarpus angolenisis em Pindanyanga

Abstract

Selective logging contributes to changing the horizontal structure of species, especially those with greater commercial value. However, there is a lack of studies that assess these impacts. This study aims to assess the impact of forestry exploration on the horizontal structure of the species Millettia stuhlmannii and Pterocarpus angolensis. The study was based on comparing the abundance and basal area of ​​species in two areas. One operated for 15 years and the other being operated for two years. The data collected were DBH's and total heights of all trees of these species found in the plot with DBH's >5cm. The results showed that for Pterocarpus angolensis it had an abundance of 22.00N/ha and 19.51 N/ha and basal area (0.533 m2/ha and 0.567m2/ha) in the unexplored and explored area respectively. average values ​​for the region (4.39 N/ha and 0.261 m2/ha). In the felling sites, the woody vegetation was practically destroyed within a radius of 3m due to the fall of the tree and the maneuver of the tractor that dragged it, while the dragging caused the soil to deform along the path and the vegetation around the path left behind. the soil exposed to erosion, though not alarming. Thus, it was concluded that the forest exploitation practiced in the Pindanyanga community forest did not significantly alter the structural parameters of Millettia stuhlmannii and Pterocarpus angolensis, therefore, it caused few impacts to the remnant vegetation(TRADUÇÃO NOSSA)