PHYTOSOCIOLOGICAL STRUCTURE OF THE TREE COMPONENT OF TWO SEASONAL EVERGREEN FOREST AREAS, RIO DAS PACAS BASIN, QUERÊNCIA, MATO GROSSO STATE, BRAZIL

• Main Authors: Sustanis Horn Kunz, Natália Macedo Ivanauskas, Sebastião Venâncio Martins, Daniel Stefanello, Elias Silva
• Format: Article
• Language: Portuguese
• Published: Universidade Federal de Santa Maria 2014-03-01
• Series: Ciência Florestal
• Subjects: riqueza; diversidade; flora; Amazônia
• Online Access: http://cascavel.ufsm.br/revistas/ojs-2.2.2/index.php/cienciaflorestal/article/view/13317

<p><a href="http://dx.doi.org/10.5902/1980509810538">http://dx.doi.org/10.5902/1980509813317</a></p>This study aimed to describe the tree component structure of two patches of Evergreen Seasonal Forest in Pacas River Basin in Querência municipality in Mato Grosso state, Brazil. The point-centered quarter method was applied to systematically distribute 200 points in pristine forest and 100 points in managed forest. In each quarter, the nearest tree to the sampling point with diameter at breast height equal or greater than 10 cm was included. Estimates of local species richness were obtained with the Jackknife 1 and the Jaccard index was used to determinate floristic similarity between the patches. Although the two forest patches have had distinct historical uses, with tree component structure distinct, the areas presented high floristic similarity (Cj=0.67), the local species richness was alike (57 species in pristine forest and 52 in managed forest) and the species with the highest importance value was the same in the both patches - Ocotea leucoxylon (Sw.) Laness. Despite the anthropogenic disturbances in the past, it is possible to conclude that the managed forest is in an advanced stage of regeneration as expected for the evergreen seasonal forests pattern since this forest is naturally less diverse than the Amazon ombrophilous forests.