STRUCTURAL COMPARISON BETWEEN MANAGED AND NON-MANAGED FOREST IN SANTO ANTONIO COMMUNITY, PAR\uc1 STATE

O objetivo deste trabalho foi analisar e comparar a composicao floristica e estrutura horizontal da floresta manejada (FM) e da floresta nao manejada (FNM). Utilizou-se amostragem casual estratificada com 12 parcelas na FM e 12 na FNM. Em parcelas de 28 x 350 m mensuraram-se todos os individuos com circunferencia a altura do peito (CAP) maior ou igual a 31,4 cm e menor do que 94,2 cm (nivel I de inclusao), subparcelas de 28 x 100 m, os individuos com 94,2 cm 64 CAP <157,1 cm (nivel de inclusao II), subparcelas de 28 x 250 m e individuos com CAP 65 157,1 m (nivel de inclusao III). Em ambas as florestas foram encontradas 216 especies, distribuidas em 44 familias botanicas. A FNM apresentou maior indice de diversidade de Shannon-Weaver (H e)(H'= 4,47). A composicao floristica, na FM, nao sofreu alteracoes significativas durante o manejo empresarial realizado. Entretanto, houve alteracoes significativas de riqueza e area basal entre FM e FNM devido a colheita realizada que implicou na retirada de individuos em classes comerciais e tambem ao dano causado as arvores remanescentes. As especies de maior importancia ecologica em FNM foram Rinorea guianensis Aubl (Violaceae), Pouteria bilocularis (H. Winkler) Baehni (Sapotaceae) e Sclerolobium paniculatum Vogel (Fabaceae). Em FM foram Rinorea guianensis Aubl (Violaceae), Manilkara huberi (Ducke) Chevalier (Sapotaceae) e Eschweilera coriacea (DC.) S.A. Mori (Lecythidaceae). Para o periodo considerado, a area basal parece estar se recuperando adequadamente.The aim of this study was to analyze and to compare the floristic composition and horizontal structure of managed forest (FM) and unmanaged forest (FNM). A stratified random sampling was used with 12 plots in the FM and 12 plots in the FNM. In plots of 28 x 350 m, all individuals with circumference at breast height (CAP) greater than or equal to 31.4 cm and smaller than 94.2 cm (inclusion level I) were measured, plots of 28 x 100 m, individuals with 64 94.2 cm CAP <157.1 cm (inclusion level II), plots of 28 x 250 m individuals with CAP 65 157.1 m (inclusion level III). In both forests 216 species were found, distributed in 44 botanical families. The FNM had a higher diversity index of Shannon-Weaver (H ') (H' = 4.47). The floristic composition, in the FM did not change significantly during the forest management. However, there were significant changes in richness and basal area between FM and FNM because of the harvesting done which resulted in the removal of individuals in commercial classes and also to the damage caused to the remaining trees. The most important species in ecological FNM were Rinorea guianensis Aubl (Violaceae), Pouteria bilocularis (H. Winkler) Baehni (Sapotaceae) and Sclerolobium paniculatum Vogel (Fabaceae). In FM, were Rinorea guianensis Aubl (Violaceae), Manilkara huberi (Ducke) Chevalier (Sapotaceae) and Eschweilera coriacea (DC.) S.A.Mori (Lecythidaceae). For the period considered, the basal area seems to be recovering properly