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Sonko A, Copin D, Brehmer P, Diop C, Constantin De Magny G, Fall M, Kande Y, Moulin P, Faye NS, Faye S, Linossier I, Le Pennec G. Assessment of the global toxicity of marine sediments from the Dakar peninsula (Senegal, West Africa). Environ Monit Assess 2022; 195:185. [PMID: 36482211 DOI: 10.1007/s10661-022-10635-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 10/07/2022] [Indexed: 06/17/2023]
Abstract
Marine pollution in West Africa is major threat particularly around coastal megacities. We assess the chemical and ecotoxicological quality of the marine sediments in various submerged sampling sites of Dakar. Analysis revealed that sediments were slightly basic in which fine and coarse sands predominated. High percentages of total organic carbon were found sometime above 6%. Higher levels of heavy metal were reported than in previous studies. Chromium and nickel were above the Probable Effect Concentration. Low trophic level appeared not affected by the overall toxicity, while medium trophic level was more affected. Indeed, the vast majority (91%) of sites studied revealed a net percentage of Magallana gigas embryolarval developmental abnormality over 20%. The assessment of the global toxicity of marine sediments from the Dakar sites Studied (n = 11) seemed, almost, as a whole, to be in a poor ecotoxicological state calling to take measures to improve the sanitary condition of this marine feature.
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Affiliation(s)
- Amidou Sonko
- Institut Sénégalais de Recherches Agricoles, ISRA, CRODT, Dakar, Senegal.
- Laboratory of Marine Biotechnology and Chemistry (LBCM), University of Southern Brittany (UBS), BP 56100, Lorient, France.
- Laboratoire de Toxicologie et d'Hydrologie, Université Cheikh Anta Diop de Dakar (UCAD), BP 5246, Dakar-Fann, Senegal.
- IRD, Univ Brest, CNRS, Ifremer, BP 1386, Dakar, Senegal.
| | - Dalyal Copin
- Laboratory of Marine Biotechnology and Chemistry (LBCM), University of Southern Brittany (UBS), BP 56100, Lorient, France
| | | | - Cheikh Diop
- Laboratoire de Toxicologie et d'Hydrologie, Université Cheikh Anta Diop de Dakar (UCAD), BP 5246, Dakar-Fann, Senegal
| | - Guillaume Constantin De Magny
- MIVEGEC, Univ. Montpellier, CNRS, Montpellier, IRD, France
- Montpellier Ecology and Evolution of Disease Network (MEEDiN), Montpellier, France
| | - Mamadou Fall
- Laboratoire de Toxicologie et d'Hydrologie, Université Cheikh Anta Diop de Dakar (UCAD), BP 5246, Dakar-Fann, Senegal
| | - Yoba Kande
- Institut Sénégalais de Recherches Agricoles, ISRA, CRODT, Dakar, Senegal
- IRD, Univ Brest, CNRS, Ifremer, BP 1386, Dakar, Senegal
- Mathematics Department, University Alioune Diop of Bambey, UADB, Bambey, Senegal
| | | | - Naby Souleymane Faye
- Institut Sénégalais de Recherches Agricoles, ISRA, CRODT, Dakar, Senegal
- IRD, Univ Brest, CNRS, Ifremer, BP 1386, Dakar, Senegal
| | - Saliou Faye
- Institut Sénégalais de Recherches Agricoles, ISRA, CRODT, Dakar, Senegal
| | - Isabelle Linossier
- Laboratory of Marine Biotechnology and Chemistry (LBCM), University of Southern Brittany (UBS), BP 56100, Lorient, France
| | - Gaël Le Pennec
- Laboratory of Marine Biotechnology and Chemistry (LBCM), University of Southern Brittany (UBS), BP 56100, Lorient, France
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