THE TOXICOLOGICAL INTERACTION BETWEEN OCEAN ACIDITY AND METALS IN COASTAL MEIOBENTHIC COPEPODS

• Published in: Marine Pollution Bulletin
• Main Authors: Pascal, Pierre-Yves, Fleeger, John, Galvez, Fernando, Carman, Kevin
• Other Authors: Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École Pratique des Hautes Études (EPHE), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Louisiana State University (LSU)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2010
• Subjects: Ocean acidification; metal; cadmium; copper; harpacticoid copepod; [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology; [SDE.BE]Environmental Sciences/Biodiversity and Ecology; [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography; Copepods
• Online Access: https://hal.science/hal-03895225; https://hal.science/hal-03895225/document; https://hal.science/hal-03895225/file/Pascal%20CO2-metal%20II.pdf; https://doi.org/10.1016/j.marpolbul.2010.08.018

International audience Increased atmospheric CO 2 concentrations are causing greater dissolution of CO 2 into seawater, and are ultimately responsible for today's ongoing ocean acidification. We manipulated seawater acidity by addition of HCl and by increasing CO 2 concentration and observed that two coastal harpacticoid copepods, Amphiascoides atopus and Schizopera knabeni were both more sensitive to increased acidity when generated by CO 2. The present study indicates that copepods living in environments more prone to hypercapnia, such as mudflats where S. knabeni lives, may be less sensitive to future acidification. Ocean acidification is also expected to alter the toxicity of waterborne metals by influencing their speciation in seawater. CO 2 enrichment did not affect the free-ion concentration of Cd but did increase the free-ion concentration of Cu. Antagonistic toxicities were observed between CO 2 with Cd, Cu and Cu free-ion in A. atopus. This interaction could be due to a competition for H + and metals for binding sites.