Temperature modulates coccolithophorid sensitivity of growth, photosynthesis and calcification to increasing seawater pCO₂.
Increasing atmospheric CO₂ concentrations are expected to impact pelagic ecosystem functioning in the near future by driving ocean warming and acidification. While numerous studies have investigated impacts of rising temperature and seawater acidification on planktonic organisms separately, little i...
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ftdoajarticles:oai:doaj.org/article:8ac2f8f261a14aefbd76d368494d5a8e 2023-05-15T17:50:51+02:00 Temperature modulates coccolithophorid sensitivity of growth, photosynthesis and calcification to increasing seawater pCO₂. Scarlett Sett Lennart T Bach Kai G Schulz Signe Koch-Klavsen Mario Lebrato Ulf Riebesell 2014-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0088308 https://doaj.org/article/8ac2f8f261a14aefbd76d368494d5a8e EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC3914986?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0088308 https://doaj.org/article/8ac2f8f261a14aefbd76d368494d5a8e PLoS ONE, Vol 9, Iss 2, p e88308 (2014) Medicine R Science Q article 2014 ftdoajarticles https://doi.org/10.1371/journal.pone.0088308 2022-12-31T04:15:40Z Increasing atmospheric CO₂ concentrations are expected to impact pelagic ecosystem functioning in the near future by driving ocean warming and acidification. While numerous studies have investigated impacts of rising temperature and seawater acidification on planktonic organisms separately, little is presently known on their combined effects. To test for possible synergistic effects we exposed two coccolithophore species, Emiliania huxleyi and Gephyrocapsa oceanica, to a CO₂ gradient ranging from ∼0.5-250 µmol kg⁻¹ (i.e. ∼20-6000 µatm pCO₂) at three different temperatures (i.e. 10, 15, 20°C for E. huxleyi and 15, 20, 25°C for G. oceanica). Both species showed CO₂-dependent optimum-curve responses for growth, photosynthesis and calcification rates at all temperatures. Increased temperature generally enhanced growth and production rates and modified sensitivities of metabolic processes to increasing CO₂. CO₂ optimum concentrations for growth, calcification, and organic carbon fixation rates were only marginally influenced from low to intermediate temperatures. However, there was a clear optimum shift towards higher CO₂ concentrations from intermediate to high temperatures in both species. Our results demonstrate that the CO₂ concentration where optimum growth, calcification and carbon fixation rates occur is modulated by temperature. Thus, the response of a coccolithophore strain to ocean acidification at a given temperature can be negative, neutral or positive depending on that strain's temperature optimum. This emphasizes that the cellular responses of coccolithophores to ocean acidification can only be judged accurately when interpreted in the proper eco-physiological context of a given strain or species. Addressing the synergistic effects of changing carbonate chemistry and temperature is an essential step when assessing the success of coccolithophores in the future ocean. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles PLoS ONE 9 2 e88308 |
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Medicine R Science Q |
spellingShingle |
Medicine R Science Q Scarlett Sett Lennart T Bach Kai G Schulz Signe Koch-Klavsen Mario Lebrato Ulf Riebesell Temperature modulates coccolithophorid sensitivity of growth, photosynthesis and calcification to increasing seawater pCO₂. |
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Medicine R Science Q |
description |
Increasing atmospheric CO₂ concentrations are expected to impact pelagic ecosystem functioning in the near future by driving ocean warming and acidification. While numerous studies have investigated impacts of rising temperature and seawater acidification on planktonic organisms separately, little is presently known on their combined effects. To test for possible synergistic effects we exposed two coccolithophore species, Emiliania huxleyi and Gephyrocapsa oceanica, to a CO₂ gradient ranging from ∼0.5-250 µmol kg⁻¹ (i.e. ∼20-6000 µatm pCO₂) at three different temperatures (i.e. 10, 15, 20°C for E. huxleyi and 15, 20, 25°C for G. oceanica). Both species showed CO₂-dependent optimum-curve responses for growth, photosynthesis and calcification rates at all temperatures. Increased temperature generally enhanced growth and production rates and modified sensitivities of metabolic processes to increasing CO₂. CO₂ optimum concentrations for growth, calcification, and organic carbon fixation rates were only marginally influenced from low to intermediate temperatures. However, there was a clear optimum shift towards higher CO₂ concentrations from intermediate to high temperatures in both species. Our results demonstrate that the CO₂ concentration where optimum growth, calcification and carbon fixation rates occur is modulated by temperature. Thus, the response of a coccolithophore strain to ocean acidification at a given temperature can be negative, neutral or positive depending on that strain's temperature optimum. This emphasizes that the cellular responses of coccolithophores to ocean acidification can only be judged accurately when interpreted in the proper eco-physiological context of a given strain or species. Addressing the synergistic effects of changing carbonate chemistry and temperature is an essential step when assessing the success of coccolithophores in the future ocean. |
format |
Article in Journal/Newspaper |
author |
Scarlett Sett Lennart T Bach Kai G Schulz Signe Koch-Klavsen Mario Lebrato Ulf Riebesell |
author_facet |
Scarlett Sett Lennart T Bach Kai G Schulz Signe Koch-Klavsen Mario Lebrato Ulf Riebesell |
author_sort |
Scarlett Sett |
title |
Temperature modulates coccolithophorid sensitivity of growth, photosynthesis and calcification to increasing seawater pCO₂. |
title_short |
Temperature modulates coccolithophorid sensitivity of growth, photosynthesis and calcification to increasing seawater pCO₂. |
title_full |
Temperature modulates coccolithophorid sensitivity of growth, photosynthesis and calcification to increasing seawater pCO₂. |
title_fullStr |
Temperature modulates coccolithophorid sensitivity of growth, photosynthesis and calcification to increasing seawater pCO₂. |
title_full_unstemmed |
Temperature modulates coccolithophorid sensitivity of growth, photosynthesis and calcification to increasing seawater pCO₂. |
title_sort |
temperature modulates coccolithophorid sensitivity of growth, photosynthesis and calcification to increasing seawater pco₂. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2014 |
url |
https://doi.org/10.1371/journal.pone.0088308 https://doaj.org/article/8ac2f8f261a14aefbd76d368494d5a8e |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
PLoS ONE, Vol 9, Iss 2, p e88308 (2014) |
op_relation |
http://europepmc.org/articles/PMC3914986?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0088308 https://doaj.org/article/8ac2f8f261a14aefbd76d368494d5a8e |
op_doi |
https://doi.org/10.1371/journal.pone.0088308 |
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PLoS ONE |
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9 |
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2 |
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e88308 |
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1766157766811975680 |