Articles | Volume 13, issue 11
https://doi.org/10.5194/bg-13-3377-2016
https://doi.org/10.5194/bg-13-3377-2016
Research article
 | 
09 Jun 2016
Research article |  | 09 Jun 2016

Survival and settling of larval Macoma balthica in a large-scale mesocosm experiment at different fCO2 levels

Anna Jansson, Silke Lischka, Tim Boxhammer, Kai G. Schulz, and Joanna Norkko

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Cited articles

Almén, A.-K., Vehmaa, A., Brutemark, A., and Engström-Öst, J.: Coping with climate change? Copepods experience drastic variations in their physicochemical environment on diurnal basis, J. Exp. Mar. Biol. Ecol., 460, 120–128, 2014.
Ankar, S.: Growth and production of Macoma balthica (L.) in a northern Baltic soft bottom, Ophelia, 1, 31–48, 1980.
Blackford, J. C. and Gilbert, F. J.: pH variability and CO2 induced acidification in the North Sea, J. Mar. Syst., 64, 229–241, 2007.
Bonsdorff, E.: Zoobenthic diversity-gradients in the Baltic Sea: Continuous post-glacial succession in a stressed ecosystem, J. Exp. Mar. Biol. Ecol., 330, 383–391, 2006.
Bonsdorff, E., Norkko, A., and Boström, C.: Recruitment and population maintenance of the bivalve Macoma balthica (L.) – factors affecting settling success and early survival on shallow sandy bottoms, in: Biology and ecology of shallow coastal waters, edited by: Eleftheriou, A., Ansell, A. D., and Smith, C. J., Proceedings of the 28th European Marine Biological Symposium, Fredensborg, Olsen and Olsen, 253–260, 1995.
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We studied the responses of larvae of Macoma balthica to a range of future CO2 scenarios using large mesocosms encompassing the entire pelagic community. We focused on the growth and settlement process of M. balthica when exposed to future CO2 levels, and found the size and time to settlement to increase along the CO2 gradient, suggesting a developmental delay. The strong impact of increasing CO2 on early-stage bivalves is alarming as these stages are crucial for sustaining viable populations.
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