Estudo fitossociológico em um remanescente de floresta atlântica visando dinâmica de espécies florestais arbóreas no município do Cabo de Santo Agostinho, PE

Abstract

The present work aims to establish a support to the dynamic of arboreous species in a remanent of Atlantic Forest in Cabo de Santo Agostinho, PE, therefore, contributing to the floristic and phytosociologic knowledge of remanent Forest of Zona da Mata in Pernambuco. The Reserva Ecológica (RESEC) de Gurjaú is located in the rural area Cabo de Santo Agostinho town (08º10’00’’ – 08º15’00’’ S of South latitude and 35º02’30’’ – 35º05’00’’ W) of West longitude). RESEC’s area is 1.077,10 ha. The annual average rain precipitation is 2.400mm and the temperature is 24,7ºC . The vegetation is a Dense Ombrofilous Forest. The samples made were 40, sistematically with an area of 250m² were sistematically made, with a total area of 1,0 ha, 25m apart from one another. All the individual adult samples at DBH ≥ 15cm and for the regeneration study DBH < 15 cm. That survey led to the identification of 112 arboreous species in 31 botanic families, among those Moraceae and Myrtaceae were of a greater number. These species produced a diversity index of Shannon e Weaver (H’) of 3,91 nats/individuos. The Red List of Threatened Plants of IUCN (The World Conservation Union) in “Vulnerable” category. The diametrical distribution showed a pattern typical of inequian, i.e., a curve in the shape of an inverted “J”, which is expected for a secondary forest in initial succession phases. The regeneration presented 909 individuals belonging to 33 families, the Annona glabra was most distinguished with 83 individuals in the three height classes (NRC). In general the Reserva Ecológica de Gurjaú is developing its successional process in an efficient way and efficiently assuringthe phytophysionomy for the Dense Ombrofilous Forest in the State of Pernambuco. Those studies are of a great importance sustainably preserving and conserving the remanining Rain Forest resources