Produção e rendimento da exploração em florestas públicas e privadas na Amazônia Oriental

Abstract

Little is known about the relationship between the volume authorized in sustainable timber forest management plans (PMFS) in the Amazon, the volume handled in official control systems and the volume actually exploited, above all, the possible consequences for the illegal timber market. The objective of this research was to evaluate the production and yield of the volume and the number of trees effectively harvested from logging management plans in public and private forests through the analysis of 85 licensed logging management plans using data from logging logged in official electronic systems control of forest products in the state of Pará. Management plans are categorized into federal, state and private public forests with one, more than one annual production unit and under community ownership. Considering the hypothesis that the productivity and exploitation yield of PMFS in public and private forests should not be different from each other, the forest exploitation yield index and the percentage of the number of trees harvested in these management plans were calculated through the simple relationship between the authorized volume and the explored volume, as well as the number of trees authorized to be cut and effectively explored. The results demonstrate that there is no statistical difference in yield in number of trees explored, between management plans in public and private forests. However, the volumetric yield of management plans in public forests is lower than in private forests. These results suggest that a significant part of the management plans in private forests can systematically be a source of forest credit used in the “heating up” of illegally obtained forest products.