Efeito do Tamanho da Unidade de Amostra na Estimativa da Área Basal e Biomassa em um Parque Ecológico em Chapadão do Sul/MS

Abstract

Forest inventories are an important tool to generate quantitative and qualitative information about the forest. However, these estimates should provide consistent and reliable results. Therefore, the objective of this work was to evaluate the performance of different sample unit sizes in estimating basal area and biomass. The evaluated area is an Ecological Park, located in Chapadão do Sul - MS, where a forest inventory was carried out with four sample unit sizes (10x10 m, 10x20 m, 20x20 m and 20x30 m). Circumferences at breast height (CAP) and height of individuals with CAP≥15 cm were measured. The precision and accuracy of each sample unit in estimating the biomass and basal area of the site was calculated. Larger sample units (20x30 m) provided smaller sampling errors for estimating basal area and woody vegetation biomass in the study area. To meet the same required accuracy, the smallest sample unit (10x10 m) requires a larger number of sample units, but less sampling effort. All sample units showed accuracy in estimating the basal area and biomass of the study site.