Distinct bacterial groups contribute to carbon cycling during a naturally iron fertilized phytoplankton bloom in the Southern Ocean
We investigated the contribution of distinct bacterial groups to bulk abundance and leucine incorporation during a spring phytoplankton bloom induced by natural iron fertilization in the Southern Ocean (Kerguelen Ocean and Plateau Compared Study, January-February 2005). Oligonucleotide probes were d...
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ftarchimer:oai:archimer.ifremer.fr:32503 2023-05-15T18:24:48+02:00 Distinct bacterial groups contribute to carbon cycling during a naturally iron fertilized phytoplankton bloom in the Southern Ocean Obernosterer, Ingrid Catala, Philippe Lebaron, Philippe West, Nyree J. 2011-11 application/pdf https://archimer.ifremer.fr/doc/00214/32503/30995.pdf https://doi.org/10.4319/lo.2011.56.6.2391 https://archimer.ifremer.fr/doc/00214/32503/ eng eng Amer Soc Limnology Oceanography https://archimer.ifremer.fr/doc/00214/32503/30995.pdf doi:10.4319/lo.2011.56.6.2391 https://archimer.ifremer.fr/doc/00214/32503/ 2011, by the Association for the Sciences of Limnology and Oceanography, Inc. info:eu-repo/semantics/openAccess restricted use Limnology And Oceanography (0024-3590) (Amer Soc Limnology Oceanography), 2011-11 , Vol. 56 , N. 6 , P. 2391-2401 text Publication info:eu-repo/semantics/article 2011 ftarchimer https://doi.org/10.4319/lo.2011.56.6.2391 2021-09-23T20:24:54Z We investigated the contribution of distinct bacterial groups to bulk abundance and leucine incorporation during a spring phytoplankton bloom induced by natural iron fertilization in the Southern Ocean (Kerguelen Ocean and Plateau Compared Study, January-February 2005). Oligonucleotide probes were designed to target five operational taxonomic units (OTUs) at a narrow phylogenetic level (>= 99% identity of the 16S ribosomal ribonucleic acid [rRNA] gene). During the peak of the phytoplankton bloom, the Roseobacter groups NAC11-7 and RCA, the OTUs SAR92 belonging to Gammaproteobacteria, and the Bacteroidetes OTU Agg58 dominated bulk abundance and leucine incorporation. These four OTUs disappeared with the decline of the bloom, when the cosmopolitan groups SAR11 and SAR86 became dominant. In high-nutrient, low-chlorophyll waters and at a site characterized by transient high phytoplankton biomass, the SAR11 and SAR86 clusters and a Polaribacter OTU dominated abundance and leucine incorporation in the upper 100 m. Our results demonstrate that a few distinct bacterial groups identified on a relatively narrow phylogenetic level account for 47% to 82% of bulk abundance and leucine incorporation during the spring phytoplankton bloom in the naturally fertilized region off Kerguelen. The major role of these bacterial groups in carbon cycling in response to natural iron fertilization in the Southern Ocean suggests they could play an important role in the coupling of the biogeochemical cycles of carbon and iron. Article in Journal/Newspaper Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Kerguelen Southern Ocean Limnology and Oceanography 56 6 2391 2401 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
We investigated the contribution of distinct bacterial groups to bulk abundance and leucine incorporation during a spring phytoplankton bloom induced by natural iron fertilization in the Southern Ocean (Kerguelen Ocean and Plateau Compared Study, January-February 2005). Oligonucleotide probes were designed to target five operational taxonomic units (OTUs) at a narrow phylogenetic level (>= 99% identity of the 16S ribosomal ribonucleic acid [rRNA] gene). During the peak of the phytoplankton bloom, the Roseobacter groups NAC11-7 and RCA, the OTUs SAR92 belonging to Gammaproteobacteria, and the Bacteroidetes OTU Agg58 dominated bulk abundance and leucine incorporation. These four OTUs disappeared with the decline of the bloom, when the cosmopolitan groups SAR11 and SAR86 became dominant. In high-nutrient, low-chlorophyll waters and at a site characterized by transient high phytoplankton biomass, the SAR11 and SAR86 clusters and a Polaribacter OTU dominated abundance and leucine incorporation in the upper 100 m. Our results demonstrate that a few distinct bacterial groups identified on a relatively narrow phylogenetic level account for 47% to 82% of bulk abundance and leucine incorporation during the spring phytoplankton bloom in the naturally fertilized region off Kerguelen. The major role of these bacterial groups in carbon cycling in response to natural iron fertilization in the Southern Ocean suggests they could play an important role in the coupling of the biogeochemical cycles of carbon and iron. |
format |
Article in Journal/Newspaper |
author |
Obernosterer, Ingrid Catala, Philippe Lebaron, Philippe West, Nyree J. |
spellingShingle |
Obernosterer, Ingrid Catala, Philippe Lebaron, Philippe West, Nyree J. Distinct bacterial groups contribute to carbon cycling during a naturally iron fertilized phytoplankton bloom in the Southern Ocean |
author_facet |
Obernosterer, Ingrid Catala, Philippe Lebaron, Philippe West, Nyree J. |
author_sort |
Obernosterer, Ingrid |
title |
Distinct bacterial groups contribute to carbon cycling during a naturally iron fertilized phytoplankton bloom in the Southern Ocean |
title_short |
Distinct bacterial groups contribute to carbon cycling during a naturally iron fertilized phytoplankton bloom in the Southern Ocean |
title_full |
Distinct bacterial groups contribute to carbon cycling during a naturally iron fertilized phytoplankton bloom in the Southern Ocean |
title_fullStr |
Distinct bacterial groups contribute to carbon cycling during a naturally iron fertilized phytoplankton bloom in the Southern Ocean |
title_full_unstemmed |
Distinct bacterial groups contribute to carbon cycling during a naturally iron fertilized phytoplankton bloom in the Southern Ocean |
title_sort |
distinct bacterial groups contribute to carbon cycling during a naturally iron fertilized phytoplankton bloom in the southern ocean |
publisher |
Amer Soc Limnology Oceanography |
publishDate |
2011 |
url |
https://archimer.ifremer.fr/doc/00214/32503/30995.pdf https://doi.org/10.4319/lo.2011.56.6.2391 https://archimer.ifremer.fr/doc/00214/32503/ |
geographic |
Kerguelen Southern Ocean |
geographic_facet |
Kerguelen Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Limnology And Oceanography (0024-3590) (Amer Soc Limnology Oceanography), 2011-11 , Vol. 56 , N. 6 , P. 2391-2401 |
op_relation |
https://archimer.ifremer.fr/doc/00214/32503/30995.pdf doi:10.4319/lo.2011.56.6.2391 https://archimer.ifremer.fr/doc/00214/32503/ |
op_rights |
2011, by the Association for the Sciences of Limnology and Oceanography, Inc. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.4319/lo.2011.56.6.2391 |
container_title |
Limnology and Oceanography |
container_volume |
56 |
container_issue |
6 |
container_start_page |
2391 |
op_container_end_page |
2401 |
_version_ |
1766205727509053440 |