Small phytoplankton contribute greatly to CO2-fixation after the diatom bloom in the Southern Ocean
Abstract Phytoplankton is composed of a broad-sized spectrum of phylogenetically diverse microorganisms. Assessing CO 2 -fixation intra- and inter-group variability is crucial in understanding how the carbon pump functions, as each group of phytoplankton may be characterized by diverse efficiencies...
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2021
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Online Access: | http://dx.doi.org/10.1038/s41396-021-00915-z https://www.nature.com/articles/s41396-021-00915-z.pdf https://www.nature.com/articles/s41396-021-00915-z |
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crspringernat:10.1038/s41396-021-00915-z 2023-05-15T18:24:45+02:00 Small phytoplankton contribute greatly to CO2-fixation after the diatom bloom in the Southern Ocean Irion, Solène Christaki, Urania Berthelot, Hugo L’Helguen, Stéphane Jardillier, Ludwig Agence Nationale de la Recherche 2021 http://dx.doi.org/10.1038/s41396-021-00915-z https://www.nature.com/articles/s41396-021-00915-z.pdf https://www.nature.com/articles/s41396-021-00915-z en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY The ISME Journal volume 15, issue 9, page 2509-2522 ISSN 1751-7362 1751-7370 Ecology, Evolution, Behavior and Systematics Microbiology journal-article 2021 crspringernat https://doi.org/10.1038/s41396-021-00915-z 2022-01-14T15:41:54Z Abstract Phytoplankton is composed of a broad-sized spectrum of phylogenetically diverse microorganisms. Assessing CO 2 -fixation intra- and inter-group variability is crucial in understanding how the carbon pump functions, as each group of phytoplankton may be characterized by diverse efficiencies in carbon fixation and export to the deep ocean. We measured the CO 2 -fixation of different groups of phytoplankton at the single-cell level around the naturally iron-fertilized Kerguelen plateau (Southern Ocean), known for intense diatoms blooms suspected to enhance CO 2 sequestration. After the bloom, small cells (<20 µm) composed of phylogenetically distant taxa (prymnesiophytes, prasinophytes, and small diatoms) were growing faster (0.37 ± 0.13 and 0.22 ± 0.09 division d −1 on- and off-plateau, respectively) than larger diatoms (0.11 ± 0.14 and 0.09 ± 0.11 division d −1 on- and off-plateau, respectively), which showed heterogeneous growth and a large proportion of inactive cells (19 ± 13%). As a result, small phytoplankton contributed to a large proportion of the CO 2 fixation (41–70%). The analysis of pigment vertical distribution indicated that grazing may be an important pathway of small phytoplankton export. Overall, this study highlights the need to further explore the role of small cells in CO 2 -fixation and export in the Southern Ocean. Article in Journal/Newspaper Southern Ocean Springer Nature (via Crossref) Kerguelen Southern Ocean The ISME Journal |
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Springer Nature (via Crossref) |
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language |
English |
topic |
Ecology, Evolution, Behavior and Systematics Microbiology |
spellingShingle |
Ecology, Evolution, Behavior and Systematics Microbiology Irion, Solène Christaki, Urania Berthelot, Hugo L’Helguen, Stéphane Jardillier, Ludwig Small phytoplankton contribute greatly to CO2-fixation after the diatom bloom in the Southern Ocean |
topic_facet |
Ecology, Evolution, Behavior and Systematics Microbiology |
description |
Abstract Phytoplankton is composed of a broad-sized spectrum of phylogenetically diverse microorganisms. Assessing CO 2 -fixation intra- and inter-group variability is crucial in understanding how the carbon pump functions, as each group of phytoplankton may be characterized by diverse efficiencies in carbon fixation and export to the deep ocean. We measured the CO 2 -fixation of different groups of phytoplankton at the single-cell level around the naturally iron-fertilized Kerguelen plateau (Southern Ocean), known for intense diatoms blooms suspected to enhance CO 2 sequestration. After the bloom, small cells (<20 µm) composed of phylogenetically distant taxa (prymnesiophytes, prasinophytes, and small diatoms) were growing faster (0.37 ± 0.13 and 0.22 ± 0.09 division d −1 on- and off-plateau, respectively) than larger diatoms (0.11 ± 0.14 and 0.09 ± 0.11 division d −1 on- and off-plateau, respectively), which showed heterogeneous growth and a large proportion of inactive cells (19 ± 13%). As a result, small phytoplankton contributed to a large proportion of the CO 2 fixation (41–70%). The analysis of pigment vertical distribution indicated that grazing may be an important pathway of small phytoplankton export. Overall, this study highlights the need to further explore the role of small cells in CO 2 -fixation and export in the Southern Ocean. |
author2 |
Agence Nationale de la Recherche |
format |
Article in Journal/Newspaper |
author |
Irion, Solène Christaki, Urania Berthelot, Hugo L’Helguen, Stéphane Jardillier, Ludwig |
author_facet |
Irion, Solène Christaki, Urania Berthelot, Hugo L’Helguen, Stéphane Jardillier, Ludwig |
author_sort |
Irion, Solène |
title |
Small phytoplankton contribute greatly to CO2-fixation after the diatom bloom in the Southern Ocean |
title_short |
Small phytoplankton contribute greatly to CO2-fixation after the diatom bloom in the Southern Ocean |
title_full |
Small phytoplankton contribute greatly to CO2-fixation after the diatom bloom in the Southern Ocean |
title_fullStr |
Small phytoplankton contribute greatly to CO2-fixation after the diatom bloom in the Southern Ocean |
title_full_unstemmed |
Small phytoplankton contribute greatly to CO2-fixation after the diatom bloom in the Southern Ocean |
title_sort |
small phytoplankton contribute greatly to co2-fixation after the diatom bloom in the southern ocean |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1038/s41396-021-00915-z https://www.nature.com/articles/s41396-021-00915-z.pdf https://www.nature.com/articles/s41396-021-00915-z |
geographic |
Kerguelen Southern Ocean |
geographic_facet |
Kerguelen Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
The ISME Journal volume 15, issue 9, page 2509-2522 ISSN 1751-7362 1751-7370 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41396-021-00915-z |
container_title |
The ISME Journal |
_version_ |
1766205618351243264 |