A comparative biomonitoring study of trace metals and organic compounds bioaccumulation in marine biofilms and caged mussels along the French Mediterranean coast

• Published in: Environmental pollution (1987) 2024-12, Vol.363 (Pt 2), p.125239, Article 125239
• Main Authors: Barre, Abel, Briand, Jean-François, Vaccher, Vincent, Briant, Nicolas, Briand, J. Marine, Dormoy, Bruno, Boissery, Pierre, Bouchoucha, Marc
• Format: Article
• Language: English
• Subjects: Animals; Bioaccumulation; Biofilms; Biological Monitoring; Bivalvia - metabolism; Environmental Monitoring - methods; France; Hydrocarbons, Chlorinated - metabolism; Mediterranean Sea; Metals - metabolism; Metals, Heavy - analysis; Metals, Heavy - metabolism; Organic Chemicals - metabolism; Pesticides - metabolism; Polychlorinated Biphenyls - analysis; Polychlorinated Biphenyls - metabolism; Polycyclic Aromatic Hydrocarbons - analysis; Polycyclic Aromatic Hydrocarbons - metabolism; Trace Elements - analysis; Trace Elements - metabolism; Water Pollutants, Chemical - analysis; Water Pollutants, Chemical - metabolism
• ISSN: 0269-7491; 1873-6424; 1873-6424
• DOI: 10.1016/j.envpol.2024.125239

The bioaccumulation potential of contaminants in marine environments was investigated in biofilms and compared with caged mussels for a wide range of both organic and metallic contaminants across a large geographic area. Marine biofilms were sampled after three months of sub-surface immersion at 49 locations along the 1800 km of the French Mediterranean coast. Ten chemical elements (i.e. As, Cd, Co, Cr, Cu, Hg, Mn, Ni, Pb, and Zn) and 57 organic compounds (i.e., 18 polycyclic aromatic hydrocarbons (PAHs), 8 dioxin-like and 6 non-dioxin-like polychlorinated biphenyls (PCBs) and 25 organochlorine pesticides (OCPs)) were quantified in triplicates, revealing different multi-contaminated profiles depending on sites. Most of contaminants exhibited higher concentrations in biofilms than in mussels. Moreover, a remarkable significant and positive correlation between the concentrations in both biological matrices was observed for PAHs and PCBs, and more contaminant-dependent for OCPs and metals. These results highlighted the potential of biofilms as relevant bioindicators of the marine chemical contamination. [Display omitted] •Marine biofilms accumulate a wide range of trace metals and organic compounds.•Biofilms exhibit multi-contaminated profiles associated with human activities.•Biofilms accumulates PCBs and most PAHs similarly to Mytilus galloprovincialis.