Negligible effects of ocean acidification on Eurytemora affinis (Copepoda) offspring production.

Almen, A.-K., Vehmaa, A., Brutemark, A., Bach, Lennart T., Lischka, Silke, Stuhr, Annegret, Furuhagen, S., Paul, Allanah J., Bermudez, Rafael, Riebesell, Ulf and Engström-Öst, J. (2016) Negligible effects of ocean acidification on Eurytemora affinis (Copepoda) offspring production. Biogeosciences (BG), 13 (4). pp. 1037-1048. DOI 10.5194/bg-13-1037-2016.

[img]
Preview
Text
bg-13-1037-2016.pdf - Published Version
Available under License Creative Commons: Attribution 3.0.

Download (672Kb) | Preview

Supplementary data:

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 four 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, had a strong positive effect. The concentration of polyunsaturated fatty acids in the females were 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.

Document Type: Article
Additional Information: WOS:000372082200011
Keywords: BALTIC SEA; OXIDATIVE STRESS; EGG-PRODUCTION; CO2-INDUCED ACIDIFICATION; PLANKTON COMMUNITY; HATCHING SUCCESS; MARINE ORGANISMS; FOOD QUALITY; ELEVATED CO2; IMPACTS
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence > FO-R05
OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BI Biological Oceanography
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.5194/bg-13-1037-2016
ISSN: 1726-4170
Projects: BIOACID, Future Ocean, SOPRAN, KOSMOS
Expeditions/Models/Experiments:
Date Deposited: 14 Dec 2015 13:13
Last Modified: 11 Jul 2017 11:02
URI: http://oceanrep.geomar.de/id/eprint/30537

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...