Composição florística e fitossociológica de um remanescente de vegetação nativa da comunidade de Inhumas, Garanhuns - PE

Abstract

The study on the floristic composition and its phytosociological structure in the remaining forests of the altitude wetlands of Pernambuco is becoming necessary, with the aim of cataloguing native tree species and evaluating the structural and dynamic of forest formation. The present work was developed in the rural area of Garanhuns in a fragment of forest in the surroundings of the source of Inhumans, the region is very degraded and its diversity floristic compromised. For the study floristic and Fitossociológico used the method of plots prepared in regular standard (10 m x 10 m), and all individuals with diameter at breast height (DAP) ≥ 5 cm were identified. The sucessional level in which the forest is and the dominant dispersion mechanism. 257 individuals were identified in 23 species, belonging to 15 families and among these four species were not identified. Among the registered species, 44% are initial secondary, 26% are pioneers, 13% late secondary and 17% unrated. In relation to the dispersion mechanism, 73% of the species showed zoochore dispersion, 15% showed Anemacória dispersion, 8% showed barocórica dispersion and 4% autochory dispersion. In relation to the horizontal fitossociológicos parameters the species with greater value of importance were Byrsonima Searicea BC, followed by the Hymenaea Courbaril L. and Cupania Impressinervia Acev.-Rodr. And with higher coverage value highlighted for Hymenaea Courbaril L. As for the vertical Fitossociológico parameter studied of the 257 individuals sampled 56% belong to the lower stratum, 34% belongs to the middle stratum and 10% to the upper stratum. The species Cupania Impressinervia Acev.-Rodr. is the best represented in the sociological position of the vertical extract, occupying the three statements. The studied flora is in an early mature stage of growth and shows that most species are in the process of expanding extract 1 to extract 2, which represents the potential process of natural regeneration.