Bacteria and Archaea Regulate Particulate Organic Matter Export in Suspended and Sinking Marine Particle Fractions
The biological carbon pump (BCP) in the Southern Ocean is driven by phytoplankton productivity and is a significant organic matter sink. However, the role of particle-attached (PA) and free-living (FL) prokaryotes (bacteria and archaea) and their diversity in influencing the efficiency of the BCP is...
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2023
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ftpubmed:oai:pubmedcentral.nih.gov:10286711 2023-07-16T03:54:22+02:00 Bacteria and Archaea Regulate Particulate Organic Matter Export in Suspended and Sinking Marine Particle Fractions Dithugoe, Choaro D. Bezuidt, Oliver K. I. Cavan, Emma L. Froneman, William P. Thomalla, Sandy J. Makhalanyane, Thulani P. 2023-04-24 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10286711/ http://www.ncbi.nlm.nih.gov/pubmed/37093039 https://doi.org/10.1128/msphere.00420-22 en eng American Society for Microbiology http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10286711/ http://www.ncbi.nlm.nih.gov/pubmed/37093039 http://dx.doi.org/10.1128/msphere.00420-22 Copyright © 2023 Dithugoe et al. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/) . mSphere Research Article Text 2023 ftpubmed https://doi.org/10.1128/msphere.00420-22 2023-06-25T01:08:54Z The biological carbon pump (BCP) in the Southern Ocean is driven by phytoplankton productivity and is a significant organic matter sink. However, the role of particle-attached (PA) and free-living (FL) prokaryotes (bacteria and archaea) and their diversity in influencing the efficiency of the BCP is still unclear. To investigate this, we analyzed the metagenomes linked to suspended and sinking marine particles from the Sub-Antarctic Southern Ocean Time Series (SOTS) by deploying a Marine Snow Catcher (MSC), obtaining suspended and sinking particulate material, determining organic carbon and nitrogen flux, and constructing metagenome-assembled genomes (MAGs). The suspended and sinking particle-pools were dominated by bacteria with the potential to degrade organic carbon. Bacterial communities associated with the sinking fraction had more genes related to the degradation of complex organic carbon than those in the suspended fraction. Archaea had the potential to drive nitrogen metabolism via nitrite and ammonia oxidation, altering organic nitrogen concentration. The data revealed several pathways for chemoautotrophy and the secretion of recalcitrant dissolved organic carbon (RDOC) from CO(2), with bacteria and archaea potentially sequestering particulate organic matter (POM) via the production of RDOC. These findings provide insights into the diversity and function of prokaryotes in suspended and sinking particles and their role in organic carbon/nitrogen export in the Southern Ocean. IMPORTANCE The biological carbon pump is crucial for the export of particulate organic matter in the ocean. Recent studies on marine microbes have shown the profound influence of bacteria and archaea as regulators of particulate organic matter export. Yet, despite the importance of the Southern Ocean as a carbon sink, we lack comparable insights regarding microbial contributions. This study provides the first insights regarding prokaryotic contributions to particulate organic matter export in the Southern Ocean. We reveal evidence ... Text Antarc* Antarctic Southern Ocean PubMed Central (PMC) Antarctic Southern Ocean mSphere 8 3 |
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Research Article Dithugoe, Choaro D. Bezuidt, Oliver K. I. Cavan, Emma L. Froneman, William P. Thomalla, Sandy J. Makhalanyane, Thulani P. Bacteria and Archaea Regulate Particulate Organic Matter Export in Suspended and Sinking Marine Particle Fractions |
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Research Article |
description |
The biological carbon pump (BCP) in the Southern Ocean is driven by phytoplankton productivity and is a significant organic matter sink. However, the role of particle-attached (PA) and free-living (FL) prokaryotes (bacteria and archaea) and their diversity in influencing the efficiency of the BCP is still unclear. To investigate this, we analyzed the metagenomes linked to suspended and sinking marine particles from the Sub-Antarctic Southern Ocean Time Series (SOTS) by deploying a Marine Snow Catcher (MSC), obtaining suspended and sinking particulate material, determining organic carbon and nitrogen flux, and constructing metagenome-assembled genomes (MAGs). The suspended and sinking particle-pools were dominated by bacteria with the potential to degrade organic carbon. Bacterial communities associated with the sinking fraction had more genes related to the degradation of complex organic carbon than those in the suspended fraction. Archaea had the potential to drive nitrogen metabolism via nitrite and ammonia oxidation, altering organic nitrogen concentration. The data revealed several pathways for chemoautotrophy and the secretion of recalcitrant dissolved organic carbon (RDOC) from CO(2), with bacteria and archaea potentially sequestering particulate organic matter (POM) via the production of RDOC. These findings provide insights into the diversity and function of prokaryotes in suspended and sinking particles and their role in organic carbon/nitrogen export in the Southern Ocean. IMPORTANCE The biological carbon pump is crucial for the export of particulate organic matter in the ocean. Recent studies on marine microbes have shown the profound influence of bacteria and archaea as regulators of particulate organic matter export. Yet, despite the importance of the Southern Ocean as a carbon sink, we lack comparable insights regarding microbial contributions. This study provides the first insights regarding prokaryotic contributions to particulate organic matter export in the Southern Ocean. We reveal evidence ... |
format |
Text |
author |
Dithugoe, Choaro D. Bezuidt, Oliver K. I. Cavan, Emma L. Froneman, William P. Thomalla, Sandy J. Makhalanyane, Thulani P. |
author_facet |
Dithugoe, Choaro D. Bezuidt, Oliver K. I. Cavan, Emma L. Froneman, William P. Thomalla, Sandy J. Makhalanyane, Thulani P. |
author_sort |
Dithugoe, Choaro D. |
title |
Bacteria and Archaea Regulate Particulate Organic Matter Export in Suspended and Sinking Marine Particle Fractions |
title_short |
Bacteria and Archaea Regulate Particulate Organic Matter Export in Suspended and Sinking Marine Particle Fractions |
title_full |
Bacteria and Archaea Regulate Particulate Organic Matter Export in Suspended and Sinking Marine Particle Fractions |
title_fullStr |
Bacteria and Archaea Regulate Particulate Organic Matter Export in Suspended and Sinking Marine Particle Fractions |
title_full_unstemmed |
Bacteria and Archaea Regulate Particulate Organic Matter Export in Suspended and Sinking Marine Particle Fractions |
title_sort |
bacteria and archaea regulate particulate organic matter export in suspended and sinking marine particle fractions |
publisher |
American Society for Microbiology |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10286711/ http://www.ncbi.nlm.nih.gov/pubmed/37093039 https://doi.org/10.1128/msphere.00420-22 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
mSphere |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10286711/ http://www.ncbi.nlm.nih.gov/pubmed/37093039 http://dx.doi.org/10.1128/msphere.00420-22 |
op_rights |
Copyright © 2023 Dithugoe et al. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/) . |
op_doi |
https://doi.org/10.1128/msphere.00420-22 |
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