Prognosis of Diameter Structure in a Mixed Ombrophyilous Forest

This study aimed to evaluate the accuracy of diameter projections, using the transition matrix and movement ratio models in different temporal amplitudes and diameter class intervals, for a Mixed Ombrophyilous Forest fragment located in the municipality of São João do Triunfo, Paraná state. The data were collected from a continuous inventory that has been carried out in a 3.5 ha sampling area since 1995. The data collected between 2000 and 2005 were divided into classes of 5 cm and 10 cm and grouped into four temporal sampling amplitudes, with projections conducted for 2004, 2006, 2008 and 2010, respectively. Efficiency of projection values was verified based on the Friedman and Kolmogorov-Smirnov test. The results indicate that the two tested models reliably estimate the number of trees of this forest fragment only for the temporal amplitude of 2 years.