Abstract
Bioavailability of heavy metals in mangrove soil in Alagoas, Brazil
Highlights
The mangrove forest is an important transitional ecosystem between terrestrial and marine environment, located in the mouth of Rivers and estuaries of tropical and subtropical areas with flooded soil by the tidal cycle and having wide range of salinity
All proposed heavy metals were found in sediments, the cadmium levels were above the normal levels proposed by Environment National Council (CONAMA) and Canadian Council of Ministers of the Environment
Mangroves with low hydrodynamic energy present highest amounts of clay and heavy metals (REITERMAJER et al 2011) which can contribute to a higher adsorption of these metals in soil
Summary
The mangrove forest is an important transitional ecosystem between terrestrial and marine environment, located in the mouth of Rivers and estuaries of tropical and subtropical areas with flooded soil by the tidal cycle and having wide range of salinity. It has vegetation composed of various halophile species. With the presence of a predominantly tropical area, Brazilian territory has a lot of mangrove forests present. This justifies the great quantity of fish species on the Brazilian coast. The main characteristics of mangrove soils have high salt content and organic matter, low consistency, anoxic conditions, dark gray coloration, and textures ranging from silty to sandy (EMBRAPA, 2011)
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