Sonko A. auteur aut IRD Copin D. auteur aut IRD Brehmer Patrice auteur aut IRD Diop C. auteur aut IRD Constantin de Magny Guillaume auteur aut IRD Fall M. auteur aut IRD Kande Y. auteur aut IRD Moulin Esmard Patricia auteur aut IRD Faye N. S. auteur aut IRD Faye S. auteur aut IRD Linossier I. auteur aut IRD Le Pennec G. auteur aut IRD text journalArticle eng text/pdf born digital access 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. specialized Marine sediments Phaeodactylum tricornutum Artemia salina Magallana gigas Heavy metal elements TOC SENEGAL 038 021 020 195 1 185 [19 ] 2023 0167-6369 https://www.documentation.ird.fr/hor/fdi:010087441 10.1007/s10661-022-10635-2 0167-6369 [F B010087441] https://www.documentation.ird.fr/hor/fdi:010087441 https://www.documentation.ird.fr/intranet/publi/2023-04/010087441.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2023-04-14 2025-02-24 fdi:010087441 fre