FLORISTIC SURVEY AND ITS GEOFUNCTIONALITY IN THE TOPOGRAPHIC GRADIENT RESPONSIBLE FOR THE VEGETATIVE DISTRIBUTION OF THE PARQUE DAS DUNAS SALVADOR-BA

Abstract

The vegetation Dunas Park presents a diverse flora belonging to different topographic zones and where there is an intercommunication of the different biological and geological characteristics. These species model these environments with different physiognomies where they act as a source of information about their environmental dynamics. This article aims to raise floristic diversity and to identify the distribution of vegetation formations that occur in various topographic levels, as well as to know the geofunctional mechanisms that act on the focal plant species that make up the restinga Dunas Park and understand the natural dynamics of this ecosystem. through the perpendicular transects to the beach line towards the airport Luiz Eduardo Magalhães is verified that the families Fabaceae, Myrtaceae Rubiaceae and Orchidaceae were the most representative. Being the family Fabaceae lots of species. Some families found in the floristic survey have species that have been influenced by the geomorphology of sandy soils. In this context, this geomorphological formation, which characterizes this dune system, formed different physiognomic aspects in the sandy landscape where they harbor a flora adapted to a certain characteristic pattern in which the area is submitted. In sites of low topographic altimetry, the predominance of a vegetative formation of herbaceous and shrub habit with great biological plasticity that favors its development in such places. This environment, which is oligrophic and susceptible to periodic flooding, has allowed a greater geological functionality by many plants called facilitators and their functional performance has mainly focused on the water and nutritional improvement of the dune sediment condition. In other, higher areas, there is a predominance of plant species of arboreal-shrub habitat that live in larger clumps with a greater plant density where it expresses its geological function to indicate the hydrogeological conditions of the areas where they are established. These conditions contributed to separation of plant formations in relation to the investigation of patterns of dominance and rarity found in this environment. Therefore, the results presented in this paper confirm that topographic conditions function as a filter selecting the species capable of establishing and persisting on certain specific habitats.