Inter- and intraspecific phenotypic plasticity of three phytoplankton species in response to ocean acidification

Hattich, Giannina, Listmann, Luisa, Raab, Julia, Ozod-Seradj, Dorthe, Reusch, Thorsten B.H. and Matthiessen, Birte (2017) Inter- and intraspecific phenotypic plasticity of three phytoplankton species in response to ocean acidification Biology Letters, 13 (2). p. 20160774. DOI 10.1098/rsbl.2016.0774.

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Phenotypic plasticity describes the phenotypic adjustment of the same genotype to different environmental conditions and is best described by a reaction norm. We focus on the effect of ocean acidification on inter- and intraspecific reaction norms of three globally important phytoplankton species (Emiliania huxleyi, Gephyrocapsa oceanica and Chaetoceros affinis). Despite significant differences in growth rates between the species, they all showed a high potential for phenotypic buffering (similar growth rates between ambient and high CO2 conditions). Only three coccolithophore genotypes showed a reduced growth in high CO2. Diverging responses to high CO2 of single coccolithophore genotypes compared with the respective mean species responses, however, raise the question of whether an extrapolation to the population level is possible from single-genotype experiments. We therefore compared the mean response of all tested genotypes with a total species response comprising the same genotypes, which was not significantly different in the coccolithophores. Assessing species reaction norms to different environmental conditions on short time scale in a genotype-mix could thus reduce sampling effort while increasing predictive power.

Document Type: Article
Keywords: Emiliania huxleyi; Gephyrocapsa oceanica; Chaetoceros affinis; ocean acidification; plasticity; reaction norm
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Evolutionary Ecology of Marine Fishes
OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
Refereed: Yes
DOI etc.: 10.1098/rsbl.2016.0774
ISSN: 1744-9561
Projects: Dynatrait
Date Deposited: 28 Feb 2017 14:12
Last Modified: 19 Dec 2017 12:51

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