Polar Biology

, Volume 40, Issue 6, pp 1211–1227 | Cite as

Metabolic response of Arctic pteropods to ocean acidification and warming during the polar night/twilight phase in Kongsfjord (Spitsbergen)

  • Silke Lischka
  • Ulf Riebesell
Original Paper


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.


Pteropods Arctic Winter Ocean acidification Ocean warming Metabolic response 



The AWIPEV station and Kings Bay AS in Ny Ålesund and the Institute for Polar Ecology in Kiel are acknowledged for logistical support. M. Marquardt assisted with the field and laboratory work. Thanks are also due to J. Büdenbender and K. Schulz for help with the CO2-system perturbation/calculation, as well as D. Hellemann, A. Ludwig, J. Meyer and I. Schaub for DIC and alkalinity analyses. Constructive comments of three anonymous reviewers helped improve the final manuscript. A. Paul is gratefully acknowledged for English proof reading. PreSens (Regensburg, Germany) provided the SensorDish Reader. This work contributes to the German BMBF (Federal Ministry for Education and Research) funded project Biological Impacts of Ocean Acidification (BIOACID, Grant Number 03F0608A).

Supplementary material

300_2016_2044_MOESM1_ESM.pdf (234 kb)
Supplementary material 1 (PDF 233 kb)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.GEOMAR Helmholtz Centre for Ocean Research KielKielGermany

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