Quantificação da abertura do dossel e biomassa movimentada no manejo florestal com auxílio de imagem de alta resolução espacial

Abstract

Forest management on timber exploration enable sustainable production and conservation of Amazonian forest. Monitoring the impacts caused by timber activity are necessary because timber can became a source of forest degradation. This study evaluated the influence of logging intensity on canopy opening and biomass after forest management, and the detection of the affected areas by remote sensing with high resolution satellite images. The canopy openness caused by infrastructure (secondary roads and decks) and logging operations (gaps and skidtrails) were measured, and the biomass converted into energy, wood and necromass. Random Forest classification was used to identify canopy opening variation at different logging intensities. Logging intensity influenced the size of canopy openness, especially gaps (59%), but did not influenced deck areas. The biomass affected by timer had the same relationship between weight and managed volume, where its higher portion remained at the soil as necromass. The use of remote sensing techniques identified 31.45% of canopy openness, with higher precision to decks (73.85) and gaps (42.34%), varying according to intensity. Small variation of logging intensity affected canopy openness, biomass and remote sensing detection. Gaps were good indicators of logging intensity and quality of management.