Sensitivity to ocean acidification parallels natural pCO2 gradients experienced by Arctic copepods under winter sea ice

• Main Authors: Lewis, Ceri N, Findlay, Helen S
• Format: Dataset
• Language: English
• Published: PANGAEA 2013
• Subjects: Alkalinity; total; standard deviation; Animalia; Aragonite saturation state; Arctic; Arthropoda; Behaviour; Bicarbonate ion; Bottles or small containers/Aquaria (<20 L); Calanus sp.; 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; Coulometric titration; DATE/TIME; Deer_Bay_OA; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Heart beat rate; Laboratory experiment; LATITUDE; LONGITUDE; Mortality/Survival; OA-ICC; Ocean Acidification International Coordination Centre; Oithona similis; Partial pressure of carbon dioxide; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Arctic Ocean; Ocean acidification; Sea ice; Zooplankton; Copepods
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.835484; https://doi.org/10.1594/PANGAEA.835484

The Arctic Ocean is a bellwether for ocean acidification, yet few direct Arctic studies have been carried out and limited observations exist, especially in winter. We present unique under-ice physicochemical data showing the persistence of a mid water column area of high CO2 and low pH through late winter, Zooplankton data demonstrating that the dominant copepod species are distributed across these different physicochemical conditions, and empirical data demonstrating that these copepods show sensitivity to pCO2 that parallels the range of natural pCO2 they experience through their daily vertical migration behavior. Our data, collected as part of the Catlin Arctic Survey, provide unique insight into the link between environmental variability, behavior, and an organism's physiological tolerance to CO2 in key Arctic biota.