Shifts in bacterial community composition associated with increased carbon cycling in a mosaic of phytoplankton blooms
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...
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ftpubmed:oai:pubmedcentral.nih.gov:4681851 2023-05-15T18:25:32+02:00 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 2016-01 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4681851/ http://www.ncbi.nlm.nih.gov/pubmed/26196334 https://doi.org/10.1038/ismej.2015.105 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4681851/ http://www.ncbi.nlm.nih.gov/pubmed/26196334 http://dx.doi.org/10.1038/ismej.2015.105 Copyright © 2016 International Society for Microbial Ecology Original Article Text 2016 ftpubmed https://doi.org/10.1038/ismej.2015.105 2017-01-08T01:00:17Z 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. Text Southern Ocean PubMed Central (PMC) Southern Ocean The ISME Journal 10 1 39 50 |
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Original Article 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 |
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Original Article |
description |
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 |
Text |
author |
Landa, Marine Blain, Stéphane Christaki, Urania Monchy, Sébastien Obernosterer, Ingrid |
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 |
Nature Publishing Group |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4681851/ http://www.ncbi.nlm.nih.gov/pubmed/26196334 https://doi.org/10.1038/ismej.2015.105 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4681851/ http://www.ncbi.nlm.nih.gov/pubmed/26196334 http://dx.doi.org/10.1038/ismej.2015.105 |
op_rights |
Copyright © 2016 International Society for Microbial Ecology |
op_doi |
https://doi.org/10.1038/ismej.2015.105 |
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The ISME Journal |
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50 |
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