Caracterização fisionômica-estrutural de um remanescente de vegetação de caatinga na Área de Proteção Ambiental das Onças, São João do Tigre - Paraíba, Brasil

Abstract

Studies on the floristic composition and phytossociological are indispensable requirements to understand the behavior, distribution and structure of vegetation providing subsidies for the development of sustainable forest management plans and the establishment of priority areas for the conservation of this biome. The goal is to raise information from floristic and phytossociological nature of a Savanna area located in the environmental protection area of Ounces, São João do Tigre, Paraíba. 14 were held where all 50x2m of transects individuals with a diameter at breast height (dbh) ≥ 2 cm were tabulated. In total for the removal were distributed in 26 families 808 individuals, and 51 genders and 67 species. Poincianella Pyramidallis in the family (Fabaceae), was the owner of the largest values, in all structural parameters analysed, this relates to the high abundance of this species. The Shannon diversity index calculated for the vegetation was 3.49 nats. ind-¹, noting that the area studied presented floristic composition varied with the presence of common species, with a superior caatinga heterogeneity with respect to other areas of the caatinga. Due to the proportions of species by ecological groups has studied the remainder in an intermediate stage of ecological succession.