Estrutura e modelagem volumétrica de uma floresta tropical úmida de terra firme, em Manicoré, Amazonas

Abstract

This work was developed with the objective of investigating the dendrometric structure of commercial species of an upland (terra firme) tropical forest and indicating those potentials for the modeling of commercial volume. The research works were developed in a 40-thousand hectare area, in a place known as Vila Democracia, in the town of Manicoré, state of Amazonas, in the Madeira River´s water shed, affluent of the right bank of the Amazonan river. I t was recorded the breast height diameter (DBH) ≥ 40 cm, at about 1.30 m above ground level, commercial height and volume. The volume was obtained through the upper stem diameter measurements. The species Eperua oleifera Ducke had individuals in all the diameter classes and had greater dendrometic estimates (medium DBH, medium basal area and medium volume), concluding that this species has a great potential market value. In the present study, techniques based on the generalized non-linear models for the estimate of the volume for individual trees were also used. Through the parameter decomposition approach, by utilizing covariants, and modeling of the variance heterogeneity, the distribution of the residues was sensibly improved and the value of the logarithm of the maximum likelihood was raised from -126.33 to -47.874, with high significance. That change affected in a decisive way the use of the model for prediction with purposes of forest planning.