Estrutura da comunidade arbustivo-arbórea em florestas tropicais subcaducifólias

Abstract

Understand the floristic composition of different formations seasonal forests deciduous (FES), covering areas floristic transitions between biomes are knowledge gaps to be filled regarding seasonal forests in Mato Grosso do Sul. In this regard aimed to carry out a structural characterization the shrub and tree community in FES, seeking to investigate whether the evaluated environments present shrub and tree composition is s imilar or distinct from each other. To get to those answers, the shrub and tree composition of three areas were evaluated: FES Submontane; Flood FES and secondary vegetation area (AVS) in an APP Sidrolândia MS, Brazil. By the method of contiguous plots, shrubs, individual trees were identified with CAP equal to or greater than 10 cm to 1.30m. We evaluated the phytosociology (Dr, DoR, FR, IVI, IVC) and alpha diversity. one NMDS sorting based on a dissimilarity matrix Bray-Curtis starting from CVI species per treatment was performed. Also we carried out a cluster analysis (UPGMA) with presence / absence of the species data from Bray Curtis distance coefficient. To quantitatively describe the number of shared and unique species used the Venn diagram. A total of 2,780 individuals were registered, FESS showed higher diversity index. There was variation in species richness. The three sampled areas resulted in significantly different environments and community structure (Pillai = 1.25, df = 4 to 294; p <0.001). The analysis (UPGMA) showed AVS assembly between FESA and a coefficient of 0, 65. The greatest species diversity and species richness in FES Submontane indicate the occurrence of high floristic heterogeneity. The lower range of species FES Flood and AVS, respe ctively, may reflect characteristics of the soil and weather on site. This composition of different species occurs because the natural regeneration process, presenting various successional trajectories where multiple factors may influence the arrival and establishment of the species. The way the site responded to anthropogenic disturbances, as well as the influences fitogeográficas occurring at the local level, also are factors that could have influenced. Finally, we emphasize the importance of preserving t hese environments to maintain the floristic richness of the region, because these continue to house valuable floristic information and may represent a model for revegetation of areas under similar conditions as well as to the reasons for proposals handlingand recovery areas degradadas.Ressalta is the importance of studies which seek to consider other environmental characteristics to better understand the functioning of the community.