Comparação da composição e estrutura dos estratos arbóreo e regenerante em um fragmento de floresta atlântica

Abstract

In tropical forests, much of its biodiversity has been lost. This scenario has put in evidence the need for studies that address the natural regeneration of the system as a way to understand the dynamics of forest renewal under various conditions of preservation. The present study aimed to verify the floristic-structural relations between the tree layers and regenerating in a fragment of Atlantic forest, Recife -PE . To survey the arboreous stratum of 15 plots of 10x20 m was sampled all woody trees and palm trees with CAP ≥ 15 cm were. A sapling survey was conducted in 90 plots of 1x1m, which included all the seedlings and sapling of woody trees and palms that had height ≤ 100 cm. We recorded 1040 individuals, belonging to 23 families and 43 species. Of these totals, 262 individuals and 32 species occurred in the arboreous stratum and 778 individuals and 32 species in regenerating stratum. The species with the highest absolute density in arboreous stratum were Schefflera morototoni, Tapirira guianensis, Eschweilera ovata, Miconia prasina and Thyrsodium spruceanum. In the saplings were: T. spruceanum, Inga thibaudiana, Myrcia guianensis, Allophylus edulis and E. ovata. The NMDS and ANOSIM showed the formation of two groups separate due to the stratification niche. The increase in density in different populations in regenerating stratum was influenced by successional category, dispersal syndrome and vertical stratification. The characteristics of the species present in functional groups allowed classifying the forest in the middle stage of regeneration. Based on these results it can be stated that the classification of species groups separated by niches stratification (arboreous and regenerating) could understand the variation in wealth and densities population in the regeneration process, describe the successional stage of vegetation, predict future changes in the community and information to support the restoration of degraded areas of the Tejipió forest and its surroundings.