Performance of the Arctic calanoid copepods Calanus glacialis and C. hyperboreus under elevated pCO2 and temperatures

• Main Authors: Hildebrandt, Nicole, Niehoff, Barbara, Sartoris, Franz-Josef
• Format: Dataset
• Language: English
• Published: PANGAEA 2014
• Subjects: Alkalinity; total; Animalia; Aragonite saturation state; Arctic; Arthropoda; Bicarbonate ion; BIOACID; Biological Impacts of Ocean Acidification; Bottles or small containers/Aquaria (<20 L); Calanus glacialis; Calanus hyperboreus; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon; inorganic; dissolved; standard deviation; Carbon/Nitrogen ratio; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Carbon mass; Coulometric titration; Dry mass; Experiment day; Figure; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gonadal stage; Growth/Morphology; Laboratory experiment; Length; Life stage; Mortality; Mortality/Survival; Nitrogen mass; OA-ICC; Ocean Acidification International Coordination Centre; Open ocean; Oxygen consumption; Partial pressure of carbon dioxide; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Ocean acidification; Copepods
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.834091; https://doi.org/10.1594/PANGAEA.834091

The sensitivity of copepods to ocean acidification (OA) and warming may increase with time, however, studies >10 days and on synergistic effects are rare. We therefore incubated late copepodites and females of two dominant Arctic species, Calanus glacialis and Calanus hyperboreus, at 0 °C at 390 and 3000 µatm pCO2 for several months in fall/winter 2010. Respiration rates, body mass and mortality in both species and life stages did not change with pCO2. To detect synergistic effects, in 2011 C. hyperboreus females were kept at different pCO2 and temperatures (0, 5, 10 °C). Incubation at 10 °C induced sublethal stress, which might have overruled effects of pCO2. At 5 °C and 3000 µatm, body carbon was significantly lowest indicating a synergistic effect. The copepods, thus, can tolerate pCO2 predicted for a future ocean, but in combination with increasing temperatures they could be sensitive to OA.