The impacts of iron limitation and ocean acidification on the cellular stoichiometry, photophysiology, and transcriptome of Phaeocystis antarctica
Abstract Phaeocystis antarctica is an integral player of the phytoplankton community of the Southern Ocean (SO), the world's largest high‐nutrient low‐chlorophyll region, and faces chronic iron (Fe) limitation. As the SO is responsible for 40% of anthropogenic CO 2 uptake, P. antarctica must al...
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crwiley:10.1002/lno.11045 2024-06-02T07:58:08+00:00 The impacts of iron limitation and ocean acidification on the cellular stoichiometry, photophysiology, and transcriptome of Phaeocystis antarctica Koch, Florian Beszteri, Sara Harms, Lars Trimborn, Scarlett Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Helmholtz Association Deutsche Forschungsgemeinschaft 2018 http://dx.doi.org/10.1002/lno.11045 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.11045 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11045 en eng Wiley http://creativecommons.org/licenses/by-nc/4.0/ Limnology and Oceanography volume 64, issue 1, page 357-375 ISSN 0024-3590 1939-5590 journal-article 2018 crwiley https://doi.org/10.1002/lno.11045 2024-05-03T11:13:08Z Abstract Phaeocystis antarctica is an integral player of the phytoplankton community of the Southern Ocean (SO), the world's largest high‐nutrient low‐chlorophyll region, and faces chronic iron (Fe) limitation. As the SO is responsible for 40% of anthropogenic CO 2 uptake, P. antarctica must also deal with ocean acidification (OA). However, mechanistic studies investigating the effects of Fe limitation and OA on trace metal (TM) stoichiometry, transcriptomic, and photophysiological responses of this species, as well as on the Fe chemistry, are lacking. This study reveals that P. antarctica responded strongly to Fe limitation by reducing its growth rate and particulate organic carbon (POC) production. Cellular concentrations of all TMs, not just Fe, were greatly reduced, suggesting that Fe limitation may drive cells into secondary limitation by another TM. P. antarctica was able to adjust its photophysiology in response to Fe limitation, resulting in similar absolute electron transport rates across PSII. Even though OA‐stimulated growth in Fe‐limited and ‐replete treatments, the slight reduction in cellular POC resulted in no net effect on POC production. In addition, relatively few genes were differentially expressed due to OA. Finally, this study demonstrates that, under our culture conditions, OA did not affect inorganic Fe or humic‐acid‐like substances in seawater but triggered the production of humic‐acid‐like substances by P. antarctica. This species is well adapted to OA under all Fe conditions, giving it a competitive advantage over more sensitive species in a future ocean. Article in Journal/Newspaper Antarc* Antarctica Ocean acidification Southern Ocean Wiley Online Library Southern Ocean Limnology and Oceanography 64 1 357 375 |
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Open Polar |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Phaeocystis antarctica is an integral player of the phytoplankton community of the Southern Ocean (SO), the world's largest high‐nutrient low‐chlorophyll region, and faces chronic iron (Fe) limitation. As the SO is responsible for 40% of anthropogenic CO 2 uptake, P. antarctica must also deal with ocean acidification (OA). However, mechanistic studies investigating the effects of Fe limitation and OA on trace metal (TM) stoichiometry, transcriptomic, and photophysiological responses of this species, as well as on the Fe chemistry, are lacking. This study reveals that P. antarctica responded strongly to Fe limitation by reducing its growth rate and particulate organic carbon (POC) production. Cellular concentrations of all TMs, not just Fe, were greatly reduced, suggesting that Fe limitation may drive cells into secondary limitation by another TM. P. antarctica was able to adjust its photophysiology in response to Fe limitation, resulting in similar absolute electron transport rates across PSII. Even though OA‐stimulated growth in Fe‐limited and ‐replete treatments, the slight reduction in cellular POC resulted in no net effect on POC production. In addition, relatively few genes were differentially expressed due to OA. Finally, this study demonstrates that, under our culture conditions, OA did not affect inorganic Fe or humic‐acid‐like substances in seawater but triggered the production of humic‐acid‐like substances by P. antarctica. This species is well adapted to OA under all Fe conditions, giving it a competitive advantage over more sensitive species in a future ocean. |
author2 |
Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Helmholtz Association Deutsche Forschungsgemeinschaft |
format |
Article in Journal/Newspaper |
author |
Koch, Florian Beszteri, Sara Harms, Lars Trimborn, Scarlett |
spellingShingle |
Koch, Florian Beszteri, Sara Harms, Lars Trimborn, Scarlett The impacts of iron limitation and ocean acidification on the cellular stoichiometry, photophysiology, and transcriptome of Phaeocystis antarctica |
author_facet |
Koch, Florian Beszteri, Sara Harms, Lars Trimborn, Scarlett |
author_sort |
Koch, Florian |
title |
The impacts of iron limitation and ocean acidification on the cellular stoichiometry, photophysiology, and transcriptome of Phaeocystis antarctica |
title_short |
The impacts of iron limitation and ocean acidification on the cellular stoichiometry, photophysiology, and transcriptome of Phaeocystis antarctica |
title_full |
The impacts of iron limitation and ocean acidification on the cellular stoichiometry, photophysiology, and transcriptome of Phaeocystis antarctica |
title_fullStr |
The impacts of iron limitation and ocean acidification on the cellular stoichiometry, photophysiology, and transcriptome of Phaeocystis antarctica |
title_full_unstemmed |
The impacts of iron limitation and ocean acidification on the cellular stoichiometry, photophysiology, and transcriptome of Phaeocystis antarctica |
title_sort |
impacts of iron limitation and ocean acidification on the cellular stoichiometry, photophysiology, and transcriptome of phaeocystis antarctica |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/lno.11045 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.11045 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11045 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Antarc* Antarctica Ocean acidification Southern Ocean |
genre_facet |
Antarc* Antarctica Ocean acidification Southern Ocean |
op_source |
Limnology and Oceanography volume 64, issue 1, page 357-375 ISSN 0024-3590 1939-5590 |
op_rights |
http://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1002/lno.11045 |
container_title |
Limnology and Oceanography |
container_volume |
64 |
container_issue |
1 |
container_start_page |
357 |
op_container_end_page |
375 |
_version_ |
1800741403681095680 |