Chifflet Sandrine auteur aut IRD Briant N. auteur aut IRD Tesan-Onrubia J. A. auteur aut IRD Zaaboub N. auteur aut IRD Amri S. auteur aut IRD Radakovitch O. auteur aut IRD Banaru D. auteur aut IRD Tedetti Marc auteur aut IRD text journalArticle eng text/pdf born digital access Particle-size classes (7 fractions from 0.8 to 2000 mu m) were collected in the deep chlorophyll maximum along a Mediterranean transect including the northern coastal zone (bays of Toulon and Marseilles, France), the offshore zone (near the North Balearic Thermal Front), and the southern coastal zone (Gulf of Gabe`s, Tunisia). Con-centrations of biotic metals and metalloids (As, Cd, Cr, Cu, Fe, Mn, Ni, Sb, V, Zn) bound to living or dead or-ganisms and faecal pellets were assessed by phosphorus normalisation. Biotic metals and metalloids concentrations (except Cr, Mn, and V) were higher in the offshore zone than in the coastal zones. In addition, biotic Sb and V concentrations appeared to be affected by atmospheric deposition, and biotic Cr concentrations appeared to be affected by local anthropogenic inputs. Essential elements (Cd, Cu, Fe, Mn, Ni, V, Zn) were very likely controlled both by the metabolic activity of certain organisms (nanoeukaryotes, copepods) and trophic structure. In the northern coastal zone, biomagnification of essential elements was controlled by copepods ac-tivities. In the offshore zone, metals and metalloids were not biomagnified probably due to homeostasis regu-latory processes in organisms. In the southern coastal zone, biomagnification of As, Cu, Cr, Sb could probably induce specific effects within the planktonic network. specialized Metals and metalloids Planktonic food webs Mediterranean Sea Biomagnification Contamination MEDITERRANEE FRANCE ESPAGNE TUNISIE 038 034 186 114384 [14 ] 2023 0025-326X https://www.documentation.ird.fr/hor/fdi:010087408 10.1016/j.marpolbul.2022.114384 0025-326X [F B010087408] https://www.documentation.ird.fr/hor/fdi:010087408 https://www.documentation.ird.fr/intranet/publi/2023-04/010087408.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2023-04-14 2025-02-24 fdi:010087408 fre