Pichler T. auteur aut IRD Biscere T. auteur aut IRD Kinch J. auteur aut IRD Zampighi M. auteur aut IRD Houlbrèque Fanny auteur aut IRD Rodolfo-Metalpa Riccardo auteur aut IRD text journalArticle eng text/pdf born digital access Volcanic CO2 seeps were successfully used to predict coral reef response to ocean acidification, although toxic elements, often characteristic of hydrothermal vents were rarely reported. We measured the physicochemical conditions, seawater carbonate chemistry and trace elements in Tutum Bay, Papua New Guinea. There, intense emission of hydrothermal fluids and CO2 expose the coral reef to a seawater pH(T) between 7.6 and 7.7. Arsenic and silica were enriched by up to six times in surface seawater, while bottom concentrations were lower and thus similar to coral reefs worldwide. Manganese, cesium, iron and zinc concentrations fell into the range of other coastal environments. Our measurements suggest that Tutum Bay is a suitable site to study the response of coral reefs to high pCO(2). Considering that arsenic is a common metal in hydrothermal fluids, its characterization should be included in any study that uses volcanic CO2 seeps as natural laboratories for ocean acidification. specialized Coral reefs Ocean acidification Metal pollution Arsenic CO2 vents PAPOUASIE NOUVELLE GUINEE AMBITLE ILE TUTUM BAIE 036 038 138 148-158 2019 0025-326X https://www.documentation.ird.fr/hor/fdi:010075148 10.1016/j.marpolbul.2018.11.003 0025-326X [F B010075148] https://www.documentation.ird.fr/hor/fdi:010075148 https://www.documentation.ird.fr/intranet/publi/2019/02/010075148.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2019-03-06 2019-03-06 fdi:010075148 fre