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Negligible effects of ocean acidification on Eurytemora affinis (Copepoda) offspring production
Citation
Almen, A-K and Vehmaa, A and Brutemark, A and Bach, L and Lischka, S and Stuhr, A and Furuhagen, S and Paul, A and Bermudez, JR and Riebesell, U and Engstrom-Ost, J, Negligible effects of ocean acidification on Eurytemora affinis (Copepoda) offspring production, Biogeosciences, 13 pp. 1037-1048. ISSN 1726-4170 (2016) [Refereed Article]
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Copyright Statement
Copyright 2016 the authors. Licensed under Creative Commons Attribution 3.0 Unported (CC BY 3.0) https://creativecommons.org/licenses/by/3.0/
DOI: doi:10.5194/bg-13-1037-2016
Abstract
Ocean acidification is caused by increasing amounts of carbon dioxide dissolving in the oceans leading to lower seawater pH. We studied the effects of lowered pH on the calanoid copepod Eurytemora affinis during a mesocosm experiment conducted in a coastal area of the Baltic Sea. We measured copepod reproductive success as a function of pH, chlorophyll a concentration, diatom and dinoflagellate biomass, carbon to nitrogen (C:N) ratio of suspended particulate organic matter, as well as copepod fatty acid composition. The laboratory-based experiment was repeated four times during 4 consecutive weeks, with water and copepods sampled from pelagic mesocosms enriched with different CO2 concentrations. In addition, oxygen radical absorbance capacity (ORAC) of animals from the mesocosms was measured weekly to test whether the copepod's defence against oxidative stress was affected by pH. We found no effect of pH on offspring production. Phytoplankton biomass, as indicated by chlorophyll a concentration and dinoflagellate biomass, had a positive effect. The concentration of polyunsaturated fatty acids in the females was reflected in the eggs and had a positive effect on offspring production, whereas monounsaturated fatty acids of the females were reflected in their eggs but had no significant effect. ORAC was not affected by pH. From these experiments we conclude that E. affinis seems robust against direct exposure to ocean acidification on a physiological level, for the variables covered in the study. E. affinis may not have faced acute pH stress in the treatments as the species naturally face large pH fluctuations.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | plankton, ocean acidification, copepod |
| Research Division: | Earth Sciences |
| Research Group: | Oceanography |
| Research Field: | Biological oceanography |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding knowledge |
| Objective Field: | Expanding knowledge in the earth sciences |
| UTAS Author: | Bach, L (Dr Lennart Bach) |
| ID Code: | 133570 |
| Year Published: | 2016 |
| Web of Science® Times Cited: | 9 |
| Deposited By: | Ecology and Biodiversity |
| Deposited On: | 2019-07-02 |
| Last Modified: | 2019-08-12 |
| Downloads: | 19 View Download Statistics |
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