Composição florística e análise fitossociológica de uma floresta secundária da rppn santa fé, Alagoas.

Abstract

ABSTRACT

Before the exploration carried out with the arrival of Europeans at the beginning of the 16th century, the Atlantic Forest occupied 15% of the Brazilian territory, currently only 12.4% of its original territory remains, and of these remnants, about 80% are located in private areas. The confirmation that human survival depends on the conservation of the environment, led to the emergence of a social awareness that it was necessary to preserve the environment, so it was necessary to create ways to conserve the environment, such as the creation of units of conservation. In Brazil, Conservation Units (UCs) are areas of land and/or sea, which have natural resources of great environmental, aesthetic, historical or cultural importance. Thus, this work aimed to analyze the floristic and phytosociological composition of species in a secondary forest. The study was carried out and developed in an area located in the Santa Fé Natural Heritage Private Reserve, which is located in the municipality of Tanque D'Arca, Alagoas. The botanical surveys were carried out in a total of 30 plots in a stage of recent regeneration with measures of 10 x 10 m. The measured arboreal individuals have a minimum circumference above the breast (CAP) > 5 cm, measured at 1.30 m from the ground. 529 arboreal individuals were recorded, distributed in 32 species belonging to 17 botanical families, dealing with ecological groups 14 species are classified as early or late secondary, which corresponds to 43.75% of the 32 different species found, 8 climax equivalent to 25, 00% and 7 pioneers 21.88%, of these 32 only 3 were not classified. The Fabaceae, Salicaceae, Sapindaceae, Malvaceae and Polygonaceae families were the ones with the highest number of individuals found, with 148 arboreal individuals found, the Fabaceae family is the one with the largest number of representatives. We can understand how much the development of individuals contained in an area can be affected according to the intensity of several factors such as climate (pluviometry, temperature, humidity), forest management, relief, history of use, disasters; but also that despite the numerous problems that areas of Atlantic Forest in the stage of secondary regeneration may face, they manage to have high resilience to these changes, ranging from a good adaptation to these changes as much as we also relate the resistance of individuals. Keywords: Conservation Units. Atlantic Forest. Phytosociology.