Files and links (2)
Published (Version of record)CC BY V4.0, Open Access
Published (Version of record)CC BY V4.0, Open
Journal article
Population-specific responses in physiological rates of Emiliania huxleyi to a broad CO2 range
Biogeosciences, Vol.15(12), pp.3691-3701
19/06/2018
Metrics
4 Record Views
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Abstract
Although coccolithophore physiological responses to CO2 -induced changes in seawater carbonate chemistry have been widely studied in the past, there is limited knowledge on the variability of physiological responses between populations from different areas. In the present study, we investigated the specific responses of growth, particulate organic (POC) and inorganic carbon (PIC) production rates of three populations of the coccolithophore Emiliania huxleyi from three regions in the North Atlantic Ocean (Azores: six strains, Canary Islands: five strains, and Norwegian coast near Bergen: six strains) to a CO2 partial pressure ( p CO2 ) range from 120 to 2630 µatm . Physiological rates of each population and individual strain increased with rising p CO2 levels, reached a maximum and declined thereafter. Optimal p CO2 for growth, POC production rates, and tolerance to low pH (i.e., high proton concentration) was significantly higher in an E. huxleyi population isolated from the Norwegian coast than in those isolated near the Azores and Canary Islands. This may be due to the large environmental variability including large p CO2 and pH fluctuations in coastal waters off Bergen compared to the rather stable oceanic conditions at the other two sites. Maximum growth and POC production rates of the Azores and Bergen populations were similar and significantly higher than that of the Canary Islands population. This pattern could be driven by temperature– CO2 interactions where the chosen incubation temperature (16 ∘C ) was slightly below what strains isolated near the Canary Islands normally experience. Our results indicate adaptation of E. huxleyi to their local environmental conditions and the existence of distinct E. huxleyi populations. Within each population, different growth, POC, and PIC production rates at different p CO2 levels indicated strain-specific phenotypic plasticity. Accounting for this variability is important to understand how or whether E. huxleyi might adapt to rising CO2 levels.
Details
- Title
- Population-specific responses in physiological rates of Emiliania huxleyi to a broad CO2 range
- Creators
- Yong Zhang - GEOMAR Helmholtz Centre for Ocean ResearchLennart T Bach - GEOMAR Helmholtz Centre for Ocean ResearchKai T Lohbeck - GEOMAR Helmholtz Centre for Ocean ResearchKai G Schulz - Southern Cross UniversityLuisa Listmann - GEOMAR Helmholtz Centre for Ocean ResearchRegina Klapper - Goethe University FrankfurtUlf Riebesell - GEOMAR Helmholtz Centre for Ocean Research
- Publication Details
- Biogeosciences, Vol.15(12), pp.3691-3701
- Publisher
- Copernicus GmbH
- Grant note
- This work was supported by the German Federal Ministry of Education and Research (Bundesministerium für Bildung und Forschung) in the framework of the collaborative project Biological Impacts of Ocean Acidification (BIOACID). Kai G. Schulz is the recipient of an Australian Research Council Future Fellowship (FT120100384). We also thank the China Postdoctoral Science Foundation (2017M612129) and Outstanding Postdoctoral Scholarship in State Key Laboratory of Marine Environmental Science at Xiamen University for their support of Yong Zhang.
- Identifiers
- 991012926965202368
- Copyright
- © Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License.
- Academic Unit
- Faculty of Science and Engineering; School of Environment, Science and Engineering; Science; Centre for Coastal Biogeochemistry
- Language
- English
- Resource Type
- Journal article