Shifts in bacterial community composition associated with increased carbon cycling in a mosaic of phytoplankton blooms
Abstract Marine microbes have a pivotal role in the marine biogeochemical cycle of carbon, because they regulate the turnover of dissolved organic matter (DOM), one of the largest carbon reservoirs on Earth. Microbial communities and DOM are both highly diverse components of the ocean system, yet th...
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croxfordunivpr:10.1038/ismej.2015.105 2024-06-23T07:56:56+00:00 Shifts in bacterial community composition associated with increased carbon cycling in a mosaic of phytoplankton blooms Landa, Marine Blain, Stéphane Christaki, Urania Monchy, Sébastien Obernosterer, Ingrid 2015 http://dx.doi.org/10.1038/ismej.2015.105 http://www.nature.com/articles/ismej2015105.pdf http://www.nature.com/articles/ismej2015105 https://academic.oup.com/ismej/article-pdf/10/1/39/56170265/41396_2016_article_bfismej2015105.pdf en eng Oxford University Press (OUP) https://academic.oup.com/pages/standard-publication-reuse-rights http://www.springer.com/tdm The ISME Journal volume 10, issue 1, page 39-50 ISSN 1751-7362 1751-7370 journal-article 2015 croxfordunivpr https://doi.org/10.1038/ismej.2015.105 2024-06-11T04:21:18Z Abstract Marine microbes have a pivotal role in the marine biogeochemical cycle of carbon, because they regulate the turnover of dissolved organic matter (DOM), one of the largest carbon reservoirs on Earth. Microbial communities and DOM are both highly diverse components of the ocean system, yet the role of microbial diversity for carbon processing remains thus far poorly understood. We report here results from an exploration of a mosaic of phytoplankton blooms induced by large-scale natural iron fertilization in the Southern Ocean. We show that in this unique ecosystem where concentrations of DOM are lowest in the global ocean, a patchwork of blooms is associated with diverse and distinct bacterial communities. By using on-board continuous cultures, we identify preferences in the degradation of DOM of different reactivity for taxa associated with contrasting blooms. We used the spatial and temporal variability provided by this natural laboratory to demonstrate that the magnitude of bacterial production is linked to the extent of compositional changes. Our results suggest that partitioning of the DOM resource could be a mechanism that structures bacterial communities with a positive feedback on carbon cycling. Our study, focused on bacterial carbon processing, highlights the potential role of diversity as a driving force for the cycling of biogeochemical elements. Article in Journal/Newspaper Southern Ocean Oxford University Press Southern Ocean The ISME Journal 10 1 39 50 |
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Open Polar |
collection |
Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract Marine microbes have a pivotal role in the marine biogeochemical cycle of carbon, because they regulate the turnover of dissolved organic matter (DOM), one of the largest carbon reservoirs on Earth. Microbial communities and DOM are both highly diverse components of the ocean system, yet the role of microbial diversity for carbon processing remains thus far poorly understood. We report here results from an exploration of a mosaic of phytoplankton blooms induced by large-scale natural iron fertilization in the Southern Ocean. We show that in this unique ecosystem where concentrations of DOM are lowest in the global ocean, a patchwork of blooms is associated with diverse and distinct bacterial communities. By using on-board continuous cultures, we identify preferences in the degradation of DOM of different reactivity for taxa associated with contrasting blooms. We used the spatial and temporal variability provided by this natural laboratory to demonstrate that the magnitude of bacterial production is linked to the extent of compositional changes. Our results suggest that partitioning of the DOM resource could be a mechanism that structures bacterial communities with a positive feedback on carbon cycling. Our study, focused on bacterial carbon processing, highlights the potential role of diversity as a driving force for the cycling of biogeochemical elements. |
format |
Article in Journal/Newspaper |
author |
Landa, Marine Blain, Stéphane Christaki, Urania Monchy, Sébastien Obernosterer, Ingrid |
spellingShingle |
Landa, Marine Blain, Stéphane Christaki, Urania Monchy, Sébastien Obernosterer, Ingrid Shifts in bacterial community composition associated with increased carbon cycling in a mosaic of phytoplankton blooms |
author_facet |
Landa, Marine Blain, Stéphane Christaki, Urania Monchy, Sébastien Obernosterer, Ingrid |
author_sort |
Landa, Marine |
title |
Shifts in bacterial community composition associated with increased carbon cycling in a mosaic of phytoplankton blooms |
title_short |
Shifts in bacterial community composition associated with increased carbon cycling in a mosaic of phytoplankton blooms |
title_full |
Shifts in bacterial community composition associated with increased carbon cycling in a mosaic of phytoplankton blooms |
title_fullStr |
Shifts in bacterial community composition associated with increased carbon cycling in a mosaic of phytoplankton blooms |
title_full_unstemmed |
Shifts in bacterial community composition associated with increased carbon cycling in a mosaic of phytoplankton blooms |
title_sort |
shifts in bacterial community composition associated with increased carbon cycling in a mosaic of phytoplankton blooms |
publisher |
Oxford University Press (OUP) |
publishDate |
2015 |
url |
http://dx.doi.org/10.1038/ismej.2015.105 http://www.nature.com/articles/ismej2015105.pdf http://www.nature.com/articles/ismej2015105 https://academic.oup.com/ismej/article-pdf/10/1/39/56170265/41396_2016_article_bfismej2015105.pdf |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
The ISME Journal volume 10, issue 1, page 39-50 ISSN 1751-7362 1751-7370 |
op_rights |
https://academic.oup.com/pages/standard-publication-reuse-rights http://www.springer.com/tdm |
op_doi |
https://doi.org/10.1038/ismej.2015.105 |
container_title |
The ISME Journal |
container_volume |
10 |
container_issue |
1 |
container_start_page |
39 |
op_container_end_page |
50 |
_version_ |
1802650329186041856 |