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|Title:||INTERAÇÃO DE INDICADORES GEOQUÍMICOS E FORAMINÍFEROS BENTÔNICOS NA AVALIAÇÃO AMBIENTAL DO RECIFE DE FORA, PORTO SEGURO, BAHIA|
|Keywords:||Composição do sedimento; Assembleia de foraminíferos; Índice FORAM; Saúde ambiental; Recife de Fora; nordeste do Brasil; Sediment composition; Foraminifera assemblages; FORAM indice; Environmental healty; Recife de Fora reef; E-Brazil|
|Abstract:||With the damages that have been caused in the brazilian reefs ecosystems and considering their high endemism, the conservation of biodiversity therefore is indispensable and the use of bioindicators are important for understanding the phenomena that affects marine ecosystems. In this context, the foraminiferal assemblages have been widespread used as environmental quality indicators of coral reefs, since these organisms are among the main producers of reef sediments. The aim of this work was to evaluate the interaction between geochemical parameters and benthic foraminifera assemblages to assess the environmental quality of Recife de Fora, which corresponds to a marine protected area subject to tourism and exploitation of its resources. For this purpose, 59 random stations were chosen for surface sediment sampling and analyses of particle size, organic matter content, calcium carbonate and foraminifera. The seaward side of the reef had the highest proportions of sand and calcium carbonate among all stations and the landward exhibited the sediments, mainly composed of mud and higher concentrations of organic matter. In the latter area the highest diversity indexes (Shanon-Wiener) were found with a greater abundance of the stress-tolerant foraminifera Bolivina, Ammonia and Nonion. As such, a close relationship among the sediment type with the diversity and the composition of foraminifera assemblage indicating that the distribution pattern of the analysed fauna is directly related to sedimentary parameters associated with the presence of coral reefs and hydrodynamic conditions operating in the area.|
|Appears in Collections:||TEDE sem arquivo|
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