Sonko A. auteur aut IRD Brehmer Patrice auteur aut IRD Constantin de Magny Guillaume auteur aut IRD Le Pennec G. auteur aut IRD Ba B. S. auteur aut IRD Diankha O. auteur aut IRD Fall M. auteur aut IRD Linossier I. auteur aut IRD Henry M. auteur aut IRD N'Diaye I. auteur aut IRD Faye S. auteur aut IRD Kande Y. auteur aut IRD Galgani F. auteur aut IRD text journalArticle eng text/pdf born digital access Marine pollution around West African big cities is of major concerns. Nevertheless, few attempts have been performed so far particularly on microplastic assessment. We had led first survey targeting microplastic in West African coastal waters (2016); and evaluated on the same sites microbiological contamination as well as marine sediment toxicity and mercury content. Thus, neuston marine water samples were collected over Dakar a highly populated West African city. The average abundance was around 258 954 microplastic particles per km2 and 37 442 for macroplastics. One station, downstream from the major wastewater plant, contained high abundance of microplastic particles of over 945 000 and 190 000 macroplastics. The offshore station had a lower abundance of microplastics and macroplastics. It was observed that the stations found with highest level of microbiological pollution were related to highest microplastics abundance and the presence of major effluents, suggesting wastewaters inputs and microbiological pollution favoured by microplastics and macroplastics as vector. No correlation was observed between microplastics and/or macroplastics and sediment toxicity neither mercury level, which appeared low in all studied sites. However, high level of ecotoxicity were often found near effluents. Such results are a first step within the framework of encouraging awareness and actions in West Africa. specialized Plastic pollution Marine litter Vibrio Mercury Marine sediment Senegal SENEGAL DAKAR 038 102 59 102755 [10 p.] 2023 2352-4855 https://www.documentation.ird.fr/hor/fdi:010086909 10.1016/j.rsma.2022.102755 2352-4855 [F B010086909] https://www.documentation.ird.fr/hor/fdi:010086909 https://www.documentation.ird.fr/intranet/publi/2023-03/010086909.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2023-03-08 2026-06-12 fdi:010086909 fre