Modelo de estimativa de volume e carbono por hectare para fragmentos de cerrado sensu stricto em Minas Gerais

Abstract

Cerrado is extraordinary because of its biodiversity, with high number of endemic species, for both fauna and flora, which makes it difficult for modeling and developing management strategies. Thus, this study aims to verify correlation between dominant height by Hart’s and Assmann’s definitions (mean height of 100 tallest and thickest trees per hectare, respectively) and stand attributes, and then fit a model to estimate volume and carbon for cerrado sensu stricto vegetation, considering dominant height and basal area as independent variables. Data was obtained from Minas Gerais Inventory. There was correlation between dominant height by Hart and Assmann definitions and the following stand attributes: total height, diameter at breast height, volume, basal area, carbon, mean quadratic diameter and number of trees per hectare. Models were fitted and then evaluated by mean error and mean absolute error. Confidence intervals were built in order to compare estimates from tradicional forest inventory metods and the models proposed in this study. Dominant height by Hart’s and Assmann’s definitions presented high correlation with stand attributes, with good correlation with the stand attributes volume and carbon. The models were adequate to estimate volume and carbon for cerrado sensu stricto.