Effects of ocean acidification on overwintering juvenile Arctic pteropods Limacina helicina, supplement to: Comeau, Steeve; Alliouane, Samir; Gattuso, Jean-Pierre (2012): Effects of ocean acidification on overwintering juvenile Arctic pteropods Limacina helicina. Marine Ecology Progress Series, 456, 279-284

• Main Authors: Comeau, Steeve, Alliouane, Samir, Gattuso, Jean-Pierre
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2012
• Subjects: Animalia; Arctic; Bottles or small containers/Aquaria <20 L; Growth/Morphology; Laboratory experiment; Limacina helicina; Mollusca; Open ocean; Pelagos; Polar; Single species; Zooplankton; Species; Treatment; Extension/diameter ratio; Salinity; Temperature, water; pH; Alkalinity, total; pH, standard deviation; Alkalinity, total, standard deviation; Carbonate system computation flag; Carbon dioxide; Partial pressure of carbon dioxide water at sea surface temperature wet air; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Carbon, inorganic, dissolved; Aragonite saturation state; Calcite saturation state; Experiment; Potentiometric; Potentiometric titration; Calculated; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Arctic Ocean; Canada; arctic pteropod; arctic pteropods; canada basin; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.830119; https://doi.pangaea.de/10.1594/PANGAEA.830119

Pteropods are planktonic mollusks that play an important role in the food web of various ecosystems, particularly at high latitudes. Because they produce an aragonitic shell, pteropods are expected to be very sensitive to ocean acidification driven by anthropogenic CO2 emissions. The effect of ocean acidification was investigated using juveniles of the Arctic pteropod Limacina helicina from the Canada Basin of the Arctic Ocean. The animals were maintained in 3 controlled pH conditions (total scale pH [pHT] = 8.05, 7.90 or 7.75) for 8 d, and their mortality and the linear extension of their shell were monitored. The pH did not impact the mortality rate, but the linear extension of the shell decreased as a function of declining pH. Surprisingly, the pteropods were still able to extend their shell at an aragonite saturation state as low as 0.6. Nevertheless, dissolution marks were visible on the whole shell, indicating that calcium carbonate dissolution had also occurred, casting doubts on the ability of the pteropods to maintain a positive balance between precipitation and dissolution of calcium carbonate under corrosive conditions. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2014-03-31.