Ocean acidification challenges copepod phenotypic plasticity

Vehmaa, A., Almen, A.-K., Brutemark, A., Paul, Allanah J., Riebesell, Ulf, Furuhagen, S. and Engström-Öst, J. (2016) Ocean acidification challenges copepod phenotypic plasticity Biogeosciences (BG), 13 (22). pp. 6171-6182. DOI 10.5194/bg-13-6171-2016.

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Abstract

Ocean acidification is challenging phenotypic plasticity of individuals and populations. Calanoid copepods (zooplankton) are shown to be fairly plastic against altered pH conditions, and laboratory studies indicate that transgenerational effects are one mechanism behind this plasticity. We studied phenotypic plasticity of the copepod Acartia sp. in the course of a pelagic, large-volume mesocosm study that was conducted to investigate ecosystem and biogeochemical responses to ocean acidification. We measured copepod egg production rate, egg-hatching success, adult female size and adult female antioxidant capacity (ORAC) as a function of acidification (fCO2  ∼  365–1231 µatm) and as a function of quantity and quality of their diet. We used an egg transplant experiment to reveal whether transgenerational effects can alleviate the possible negative effects of ocean acidification on offspring development. We found significant negative effects of ocean acidification on adult female size. In addition, we found signs of a possible threshold at high fCO2, above which adaptive maternal effects cannot alleviate the negative effects of acidification on egg-hatching and nauplii development. We did not find support for the hypothesis that insufficient food quantity (total particulate carbon < 55 µm) or quality (C : N) weakens the transgenerational effects. However, females with high-ORAC-produced eggs with high hatching success. Overall, these results indicate that Acartia sp. could be affected by projected near-future CO2 levels

Document Type: Article
Funder compliance: info:eu-repo/grantAgreement/EC/FP7/228224
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence > FO-R07
OceanRep > The Future Ocean - Cluster of Excellence > FO-R05
OceanRep > The Future Ocean - Cluster of Excellence > FO-R08
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-13-6171-2016
ISSN: 1726-4170
Projects: BIOACID, SOPRAN, MESOAQUA, Future Ocean
Expeditions/Models/Experiments:
Date Deposited: 14 Dec 2015 13:17
Last Modified: 05 Apr 2017 09:44
URI: http://oceanrep.geomar.de/id/eprint/30539

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