TitleTrace metals and nutrient biogeochemistry in the sediments of Indian mangroves     

Abstract: Mangrove ecosystem besides being amongst the world’s most productive tropical ecosystem, is one of the most threatened tropical ecosystems. The paper emphasise on Indian mangrove ecosystem, its distribution, heavy metal pollution and their toxic effect in mangrove ecosystem. The heavy metals like Cd, Fe have very high contamination in Indian mangroves whereas Co, Cr, Cu, Mn, Ni, Pb and Zn are of moderate contamination. Especially in Pichavaram tsunamigenic sediments, enrichment of metals are very high. Al, As contamination, enrichment, geo-accumulation and potential ecological risk are very low at all mangrove sites of India in the study done so far whereas Cd has highest ecological risk at all mangroves sites.