Estrutura de espécies arbóreas sob efeito de borda em um fragmento de floresta estacional semidecidual em Pernambuco

摘要

Forest fragments are considered the last refuges for biodiversity in the planet. Knowing the processes that occur after fragmentation, such as the tree structure that occurs in the edge, is fundamental to propose conservationist measures. The objective of this work was to carry out a phytosociological survey of adult tree species under edge effect and verify the floristic similarity among the plots. The work was developed in an area of 83,8 ha located in the municipality of Nazaré da Mata - PE. The sample area comprised 10.000 m2, equivalent to the implantation of 10 contiguous transects of 10 x 100 m perpendicular to the edge. All tree individuals with CAP e" 15 cm were sampled, labeled and identified. Afterward, phytosociological parameters and the floristic similarity were calculated. In this study, 1238 individuals, belonging to 72 táxons and distributed into 26 botanical families were sampled. The species Campomanesia xanthocarpa, Zanthoxylum rhoifolium, and Anadenanthera colubrina, showed the largest importance value, as theoretically, they managed to better exploit habitat resources.