Seawater carbonate chemistry and biological processes of zooplankton Amphiascoides atopus and Schizopera knabeni during experiments, 2010

• Main Authors: Pascal, Pierre-Yves, Fleeger, J W, Galvez, Fernando, Carman, Kevin R
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: Alkalinity; Gran titration (Gran; 1950); total; Amphiascoides atopus; Animalia; Aragonite saturation state; Arthropoda; Bicarbonate ion; Bottles or small containers/Aquaria (<20 L); Cadmium; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon; inorganic; dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Copper; EPOCA; EUR-OCEANS; European network of excellence for Ocean Ecosystems Analysis; European Project on Ocean Acidification; Experimental treatment; Flame r atomic absorption spectroscopy (Varian AA240FS); Fugacity of carbon dioxide (water) at sea surface temperature (wet air); ICP-OES; Inductively coupled plasma - optical emission spectrometry; Inorganic toxins; Laboratory experiment; Mortality; Mortality/Survival; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH meter (Oakton); Salinity; Schizopera knabeni; Single species; Species; Temperate; Temperature; water; Ocean acidification; Copepods
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.763298; https://doi.org/10.1594/PANGAEA.763298

Increased atmospheric CO2 concentrations are causing greater dissolution of CO2 into seawater, and are ultimately responsible for today's ongoing ocean acidification. We manipulated seawater acidity by addition of HCl and by increasing CO2 concentration and observed that two coastal harpacticoid copepods, Amphiascoides atopus and Schizopera knabeni were both more sensitive to increased acidity when generated by CO2. 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. CO2 enrichment did not affect the free-ion concentration of Cd but did increase the free-ion concentration of Cu. Antagonistic toxicities were observed between CO2 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.