Seawater carbonate chemistry and metabolic data of Arctic pteropods in lab experiment, supplement to: Lischka, Silke; Riebesell, Ulf (2017): Metabolic response of Arctic pteropods to ocean acidification and warming during the polar night/twilight phase in Kongsfjord (Spitsbergen). Polar Biology, 40(6), 1211-1227

• Main Authors: Lischka, Silke, Riebesell, Ulf
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2017
• Subjects: Animalia; Arctic; Behaviour; Bottles or small containers/Aquaria <20 L; Coast and continental shelf; Growth/Morphology; Laboratory experiment; Limacina helicina; Limacina retroversa; Mollusca; Other metabolic rates; Pelagos; Polar; Respiration; Single species; Temperature; Zooplankton; Type; Species; Registration number of species; Uniform resource locator/link to reference; Experiment; Experiment duration; Temperature, water; Partial pressure of carbon dioxide water at sea surface temperature wet air; Replicates; Replicate; Dry mass; Dry mass, standard deviation; Oxygen consumption, per mass; Oxygen consumption, standard deviation; Ammonia excretion; Ammonia excretion, standard deviation; Oxygen consumed/Nitrogen excreted ratio; Oxygen consumed/nitrogen excreted ratio, standard deviation; Activity; Diameter; Diameter, standard deviation; Alkalinity, total; pH; pH, standard deviation; Carbon, inorganic, dissolved; Aragonite saturation state; Salinity; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Calcite saturation state; Calculated using seacarb after Nisumaa et al. 2010; Biological Impacts of Ocean Acidification BIOACID; Ocean Acidification International Coordination Centre OA-ICC; Kongsfjord; arctic pteropods; Kongsfjord*; Ocean acidification; polar night; Spitsbergen
• Online Access: https://dx.doi.org/10.1594/pangaea.875108; https://doi.pangaea.de/10.1594/PANGAEA.875108

Thecosome pteropods are considered highly sensitive to ocean acidification. During the Arctic winter, increased solubility of CO2 in cold waters intensifies ocean acidification and food sources are limited. Ocean warming is also particularly pronounced in the Arctic. Here, we present the first data on metabolic rates of two pteropod species (Limacina helicina, Limacina retroversa) during the Arctic winter at 79°N (polar night/twilight phase). Routine oxygen consumption rates and the metabolic response [oxygen consumption (MO2), ammonia excretion (NH3), overall metabolic balance (O:N)] to elevated levels of pCO2 and temperature were examined. Our results suggest lower routine MO2 rates for both Limacina species in winter than in summer. In an 18-h experiment, both pCO2 and temperature affected MO2 of L. helicina and L. retroversa. After a 9-day experiment with L. helicina all three metabolic response variables were affected by the two factors with interactive effects in case of NH3 and O:N. The response resembled a “hormesis-type” pattern with up-regulation at intermediate pCO2 and the highest temperature level. For L. retroversa, NH3 excretion was affected by both factors and O:N only by temperature. No significant effects of pCO2 or temperature on MO2 were detected. Metabolic up-regulation will entail higher energetic costs that may not be covered during periods of food limitation such as the Arctic winter and compel pteropods to utilize storage compounds to a greater extent than usual. This may reduce the fitness and survival of overwintering pteropods and negatively impact their reproductive success in the following summer. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2016) 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 2017-05-10.