Ocean acidification stimulates particulate organic carbon accumulation in two Antarctic diatom species under moderate and high natural solar radiation
Impacts of rising atmospheric CO 2 concentrations and increased daily irradiances from enhanced surface water stratification on phytoplankton physiology in the coastal Southern Ocean remain still unclear. Therefore, in the two Antarctic diatoms Fragilariopsis curta and Odontella weissflogii, the eff...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6120492/ http://www.ncbi.nlm.nih.gov/pubmed/29791031 https://doi.org/10.1111/jpy.12753 |
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ftpubmed:oai:pubmedcentral.nih.gov:6120492 2023-05-15T13:51:43+02:00 Ocean acidification stimulates particulate organic carbon accumulation in two Antarctic diatom species under moderate and high natural solar radiation Heiden, Jasmin P. Thoms, Silke Bischof, Kai Trimborn, Scarlett 2018-06-25 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6120492/ http://www.ncbi.nlm.nih.gov/pubmed/29791031 https://doi.org/10.1111/jpy.12753 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6120492/ http://www.ncbi.nlm.nih.gov/pubmed/29791031 http://dx.doi.org/10.1111/jpy.12753 © 2018 The Authors. Journal of Phycology published by Wiley Periodicals, Inc. on behalf of Phycological Society of America This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Regular Articles Text 2018 ftpubmed https://doi.org/10.1111/jpy.12753 2018-09-09T00:21:50Z Impacts of rising atmospheric CO 2 concentrations and increased daily irradiances from enhanced surface water stratification on phytoplankton physiology in the coastal Southern Ocean remain still unclear. Therefore, in the two Antarctic diatoms Fragilariopsis curta and Odontella weissflogii, the effects of moderate and high natural solar radiation combined with either ambient or future pCO 2 on cellular particulate organic carbon (POC) contents and photophysiology were investigated. Results showed that increasing CO 2 concentrations had greater impacts on diatom physiology than exposure to increasing solar radiation. Irrespective of the applied solar radiation regime, cellular POC quotas increased with future pCO 2 in both diatoms. Lowered maximum quantum yields of photochemistry in PSII (Fv/Fm) indicated a higher photosensitivity under these conditions, being counteracted by increased cellular concentrations of functional photosynthetic reaction centers. Overall, our results suggest that both bloom‐forming Antarctic coastal diatoms might increase carbon contents under future pCO 2 conditions despite reduced physiological fitness. This indicates a higher potential for primary productivity by the two diatom species with important implications for the CO 2 sequestration potential of diatom communities in the future coastal Southern Ocean. Text Antarc* Antarctic Ocean acidification Southern Ocean PubMed Central (PMC) Antarctic Southern Ocean Journal of Phycology 54 4 505 517 |
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Regular Articles Heiden, Jasmin P. Thoms, Silke Bischof, Kai Trimborn, Scarlett Ocean acidification stimulates particulate organic carbon accumulation in two Antarctic diatom species under moderate and high natural solar radiation |
topic_facet |
Regular Articles |
description |
Impacts of rising atmospheric CO 2 concentrations and increased daily irradiances from enhanced surface water stratification on phytoplankton physiology in the coastal Southern Ocean remain still unclear. Therefore, in the two Antarctic diatoms Fragilariopsis curta and Odontella weissflogii, the effects of moderate and high natural solar radiation combined with either ambient or future pCO 2 on cellular particulate organic carbon (POC) contents and photophysiology were investigated. Results showed that increasing CO 2 concentrations had greater impacts on diatom physiology than exposure to increasing solar radiation. Irrespective of the applied solar radiation regime, cellular POC quotas increased with future pCO 2 in both diatoms. Lowered maximum quantum yields of photochemistry in PSII (Fv/Fm) indicated a higher photosensitivity under these conditions, being counteracted by increased cellular concentrations of functional photosynthetic reaction centers. Overall, our results suggest that both bloom‐forming Antarctic coastal diatoms might increase carbon contents under future pCO 2 conditions despite reduced physiological fitness. This indicates a higher potential for primary productivity by the two diatom species with important implications for the CO 2 sequestration potential of diatom communities in the future coastal Southern Ocean. |
format |
Text |
author |
Heiden, Jasmin P. Thoms, Silke Bischof, Kai Trimborn, Scarlett |
author_facet |
Heiden, Jasmin P. Thoms, Silke Bischof, Kai Trimborn, Scarlett |
author_sort |
Heiden, Jasmin P. |
title |
Ocean acidification stimulates particulate organic carbon accumulation in two Antarctic diatom species under moderate and high natural solar radiation |
title_short |
Ocean acidification stimulates particulate organic carbon accumulation in two Antarctic diatom species under moderate and high natural solar radiation |
title_full |
Ocean acidification stimulates particulate organic carbon accumulation in two Antarctic diatom species under moderate and high natural solar radiation |
title_fullStr |
Ocean acidification stimulates particulate organic carbon accumulation in two Antarctic diatom species under moderate and high natural solar radiation |
title_full_unstemmed |
Ocean acidification stimulates particulate organic carbon accumulation in two Antarctic diatom species under moderate and high natural solar radiation |
title_sort |
ocean acidification stimulates particulate organic carbon accumulation in two antarctic diatom species under moderate and high natural solar radiation |
publisher |
John Wiley and Sons Inc. |
publishDate |
2018 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6120492/ http://www.ncbi.nlm.nih.gov/pubmed/29791031 https://doi.org/10.1111/jpy.12753 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Ocean acidification Southern Ocean |
genre_facet |
Antarc* Antarctic Ocean acidification Southern Ocean |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6120492/ http://www.ncbi.nlm.nih.gov/pubmed/29791031 http://dx.doi.org/10.1111/jpy.12753 |
op_rights |
© 2018 The Authors. Journal of Phycology published by Wiley Periodicals, Inc. on behalf of Phycological Society of America This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
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CC-BY |
op_doi |
https://doi.org/10.1111/jpy.12753 |
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Journal of Phycology |
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54 |
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4 |
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505 |
op_container_end_page |
517 |
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1766255738708033536 |