Estrutura e dinâmica da população de Jacaranda copaia (Aubl.) D. Don pós colheita em floresta degradada na Amazônia Brasileira

Abstract

The aim of the study was to evaluate the post-harvest influence on the structure and forest dynamics of the Jacaranda copaia (Aubl.) D. Don species in degraded forest in the Amazon. Horizontal structure parameters, mortality and inflow dynamics, annual periodic increment in diameter and diametric distribution were evaluated at two sites in the same area, with different monitoring periods. Data on the species was collected from 50 permanent continuous forest inventory plots on 12.5 ha, including control plots (5.0 ha) and plots subject to harvesting (7.5 ha), from all trees with DBH ≥ 5 cm, for site I (2009, 2012, 2014 and 2020) and site II (2011, 2015 and 2020). Variations in the species' population were observed over the years, influenced by harvesting and the natural dynamics of the forest. At site I, the population increased by around 7.21% between 2014 and 2020, following harvesting in 2013. The basal area also increased significantly. At Site II, the population decreased between 2011 and 2015, followed by an increase until 2020, showing that it is in the process of restructuring. Post-harvest forest management favored the J. copaia population, demonstrating its ability to recover.