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Bioaccumulation, Bioconcentration, and Biomagnification: Justification for Expediting the Clean-up of Contaminated Mangroves in Ogoniland

Victor Ezebuiro, Ijeoma Vivian Nwaguma


Mangroves, which once served as natural reservoir of beneficial seafood to the inhabitants of ogoniland, an oil-rich community in the Niger Delta region of Nigeria, now, pose serious ecological and health risks to the people. Crude oil exploration and exploitation in this region have brought about increased release of harmful chemical substances into these mangrove environments. These chemicals build up in the native flora and fauna associated with the ecosystem through bioaccumulation and/or biomagnification. While the effect of toxic aromatic hydrocarbons on the health of the inhabitants of this region resulting from continued delay in the bioremediation of the contaminated wetlands has dominated many scientific literatures, little attention has been given to the ecological and health consequences that could arise from bioaccumulation, bioconcentration, and biomagnification of these toxic chemicals. This study reviews the concepts of bioaccumulation, bioconcentration and biomagnification as justifiable reasons to expedite the ogoniland clean-up exercise.

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