10.2190/ES.32.1.e 8U0017064G1H84M7 5 Chemical Components and Nutrients in Mangal Sediments of Cross and Qua Iboe Rivers, South-East Nigeria 37 54 20101129 20101129 20101129 20101129 8U0017064G1H84M7.pdf http://baywood.metapress.com/link.asp?target=contribution&id=8U0017064G1H84M7 1 F. Emile Asuquo Ita Ewa-Oboho University of Calabar, Nigeria The coastal area of south-east Nigeria is extensively fringed by mangroves species which include <i>Avicennia africana</i> (white mangrove), <i>Rhizophora mangle, Rhizophora racemosa, Rhizophora harrisonii</i> (red mangroves), and <i>Languncularia racemosa</i> (black mangrove). This study examined the chemical components of the mangrove sediments and the extent of impact by human activities. The mangal sediments were characteristically acidic and non-sodic especially at the eastern Cross river flank. 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