Caracterização fisionômica e estrutural da vegetação rupícola sobre os mirantes naturais no Parque Urbano de Igatú, Andaraí - Bahia

Abstract

“Campo Rupestre” is a type of training not essentially countryside with vegetation physiognomic and ecological characteristics unique. Fields Cave, unlike other configurations such as the Amazonia and the Cerrado do not have a core area of distribution, are presented in separate areas, separated by forested valleys, plateaus and hydrographic basins. The most important type of habitat in “Campo Rupestre” is the rocky outcrops. The present study aimed to characterize the vegetation on rocky outcrops of the Manga do Céu and contribute to the conservation of these environments assisting in the preparation of the Management Plan's Parque Urbano de Igatu. The study area is located in the district Igatu which is 12km from the city Andaraí in Chapada Diamantina - BA. In Igatu ecotourism begins to emerge, therefore, understand the physiognomy of these landscapes poorly transformed by the impact is of paramount importance, since many trails are located on rocky outcrops and it is unclear what impact this has on the vegetationFor the preparation of floristic list was collected from fertile specimens from February 2010 to September 2011. Were identified forms of life for the construction of the biological spectrum. To assess the diversity of the community used the diversity index of Shannon-Wiener (H ') and evenness index (J'). We collected 24 species of vascular plants with a total area of 72m 2, being the richest families: Bromeliaceae and Araceae with five species with three species. The biological spectrum showed the predominance of hemicryptophytes, followed by fanerófito. The taxon was Barbacenia blanchetii most frequent, followed by Micranthocereus purpureus, Orthophytum burle-marxii and Cattleya elongata. The species with the highest value for the community was Barbacenia blanchetii, followed by Orthophytum burle-marxii Micranthocereus purpureus and making up more than 50% of the total sum of the index. The diversity index Shannon-Wiener (H ') was 2.47 and the evenness (J') was 0.77.