Osmotrophy of dissolved organic compounds by coccolithophore populations: Fixation into particulate organic and inorganic carbon
Coccolithophores are typically thought of as photoautotrophs, yet a few genera inhabit sub-euphotic environments with insufficient light for photosynthesis, suggesting that other carbon acquisition strategies are likely. Field experiments were performed in the northwest Atlantic (a region with poten...
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craaas:10.1126/sciadv.adf6973 2024-06-09T07:48:38+00:00 Osmotrophy of dissolved organic compounds by coccolithophore populations: Fixation into particulate organic and inorganic carbon Balch, William M. Drapeau, David T. Poulton, Nicole Archer, Stephen D. Cartisano, Carmen Burnell, Craig Godrijan, Jelena 2023 http://dx.doi.org/10.1126/sciadv.adf6973 https://www.science.org/doi/pdf/10.1126/sciadv.adf6973 en eng American Association for the Advancement of Science (AAAS) Science Advances volume 9, issue 21 ISSN 2375-2548 journal-article 2023 craaas https://doi.org/10.1126/sciadv.adf6973 2024-05-16T12:55:44Z Coccolithophores are typically thought of as photoautotrophs, yet a few genera inhabit sub-euphotic environments with insufficient light for photosynthesis, suggesting that other carbon acquisition strategies are likely. Field experiments were performed in the northwest Atlantic (a region with potentially abundant coccolithophores). Phytoplankton populations were incubated with 14 C-labeled dissolved organic carbon (DOC) compounds, acetate, mannitol, and glycerol. Coccolithophores were sorted from these populations 24 hours later using flow cytometry, and DOC uptake was measured. DOC uptake rates were as high as 10 −15 moles cell −1 day −1 , slow relative to photosynthesis rates (10 −12 moles cell −1 day −1 ). Growth rates on the organic compounds were low, suggesting that osmotrophy plays more of a survival strategy in low-light situations. Assimilated DOC was found in both particulate organic carbon and calcite coccoliths (particulate inorganic carbon), suggesting that osmotrophic uptake of DOC into coccolithophore calcite is a small but notable part of the biological carbon pump and alkalinity pump paradigms. Article in Journal/Newspaper Northwest Atlantic AAAS Resource Center (American Association for the Advancement of Science) Science Advances 9 21 |
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AAAS Resource Center (American Association for the Advancement of Science) |
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language |
English |
description |
Coccolithophores are typically thought of as photoautotrophs, yet a few genera inhabit sub-euphotic environments with insufficient light for photosynthesis, suggesting that other carbon acquisition strategies are likely. Field experiments were performed in the northwest Atlantic (a region with potentially abundant coccolithophores). Phytoplankton populations were incubated with 14 C-labeled dissolved organic carbon (DOC) compounds, acetate, mannitol, and glycerol. Coccolithophores were sorted from these populations 24 hours later using flow cytometry, and DOC uptake was measured. DOC uptake rates were as high as 10 −15 moles cell −1 day −1 , slow relative to photosynthesis rates (10 −12 moles cell −1 day −1 ). Growth rates on the organic compounds were low, suggesting that osmotrophy plays more of a survival strategy in low-light situations. Assimilated DOC was found in both particulate organic carbon and calcite coccoliths (particulate inorganic carbon), suggesting that osmotrophic uptake of DOC into coccolithophore calcite is a small but notable part of the biological carbon pump and alkalinity pump paradigms. |
format |
Article in Journal/Newspaper |
author |
Balch, William M. Drapeau, David T. Poulton, Nicole Archer, Stephen D. Cartisano, Carmen Burnell, Craig Godrijan, Jelena |
spellingShingle |
Balch, William M. Drapeau, David T. Poulton, Nicole Archer, Stephen D. Cartisano, Carmen Burnell, Craig Godrijan, Jelena Osmotrophy of dissolved organic compounds by coccolithophore populations: Fixation into particulate organic and inorganic carbon |
author_facet |
Balch, William M. Drapeau, David T. Poulton, Nicole Archer, Stephen D. Cartisano, Carmen Burnell, Craig Godrijan, Jelena |
author_sort |
Balch, William M. |
title |
Osmotrophy of dissolved organic compounds by coccolithophore populations: Fixation into particulate organic and inorganic carbon |
title_short |
Osmotrophy of dissolved organic compounds by coccolithophore populations: Fixation into particulate organic and inorganic carbon |
title_full |
Osmotrophy of dissolved organic compounds by coccolithophore populations: Fixation into particulate organic and inorganic carbon |
title_fullStr |
Osmotrophy of dissolved organic compounds by coccolithophore populations: Fixation into particulate organic and inorganic carbon |
title_full_unstemmed |
Osmotrophy of dissolved organic compounds by coccolithophore populations: Fixation into particulate organic and inorganic carbon |
title_sort |
osmotrophy of dissolved organic compounds by coccolithophore populations: fixation into particulate organic and inorganic carbon |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1126/sciadv.adf6973 https://www.science.org/doi/pdf/10.1126/sciadv.adf6973 |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
Science Advances volume 9, issue 21 ISSN 2375-2548 |
op_doi |
https://doi.org/10.1126/sciadv.adf6973 |
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Science Advances |
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9 |
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21 |
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