TY - JOUR T1 - Application of Zn Isotope Compositions in Oysters to Monitor and Quantify Anthropogenic Zn Bioaccumulation in Marine Environments over Four Decades: A “Mussel Watch Program” Upgrade A1 - Ferreira Araujo,Daniel A1 - Ponzevera,Emmanuel A1 - Weiss,Dominik Jakob A1 - Knoery,Joel A1 - Briant,Nicolas A1 - Yepez,Santiago A1 - Bruzac,Sandrine A1 - Sireau,Teddy A1 - Brach-Papa,Christophe AD - Laboratoire de Biogéochimie des Contaminants Métalliques, IFREMER, Centre Atlantique, F44311 Nantes, Cedex 3, France AD - Department of Earth Science and Engineering, Imperial College London, London SW7 2BP, United Kingdom AD - Department of Civil and Environmental Engineering, Princeton University, Princeton, New Jersey 08540, United States AD - Department of Forest Management and Environment, Faculty of Forestry, University of Concepcion, Calle Victoria, 500 Concepción, Bio-Bio, Chile AD - Laboratoire Environnement Ressources Provence-Azur-Corse, Ifremer, Centre Méditerranée, Zone Portuaire de Brégaillon, CS20 330, 83507 La Seyne-sur-Mer Cedex, France UR - https://doi.org/10.1021/acsestwater.1c00010 DO - 10.1021/acsestwater.1c00010 KW - Loire estuary KW - Bay of Biscay KW - nontraditional isotopes KW - metal contamination KW - biomonitoring KW - marine pollution KW - bivalve mollusk KW - Crassostrea gigas N2 - The application of zinc (Zn) isotope compositions in bivalve organisms to quantify anthropogenic Zn bioaccumulation in marine biota is of great interest to environmental marine management programs such as the “Mussel Watch Program”. Field studies, however, are urgently needed to test its practical value. To this end, we investigated Zn isotope variations in the oyster Crassostrea gigas collected over four decades near the Loire estuary (France), where previous geochemical studies provided evidence for a regionally uniform but temporally variable metal contamination. We show that the Zn temporal isotope profile of oysters matches that of the sedimentary records with an isotope offset of approximately +0.5–0.7‰, tentatively attributed to compromised estuarine processes and trophic transfer. A Zn isotope model for quantifying anthropogenic Zn bioaccumulation suggests an overall decrease in anthropogenic estuarine Zn levels over the past 40 years. This first successful application of Zn isotope ratios in a bivalve species to quantify anthropogenic Zn bioaccumulation confirms their utility for supporting environmental management strategies in marine biomonitoring programs. Y1 - 2021/04 PB - American Chemical Society (ACS) JF - Acs Environmental Science And Technology Water SN - 2690-0637 VL - 1 IS - 4 SP - 1035 EP - 1046 ID - 79374 ER -