Seasonal dynamics of prokaryotes and their associations with diatoms in the Southern Ocean as revealed by an autonomous sampler
The Southern Ocean remains one of the least explored marine environments. The investigation of temporal microbial dynamics has thus far been hampered by the limited access to this remote ocean. We present here high‐resolution seasonal observations of the prokaryotic community composition during phyt...
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Online Access: | https://archimer.ifremer.fr/doc/00643/75475/76311.pdf https://doi.org/10.1111/1462-2920.15184 https://archimer.ifremer.fr/doc/00643/75475/ |
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ftarchimer:oai:archimer.ifremer.fr:75475 2023-05-15T18:24:45+02:00 Seasonal dynamics of prokaryotes and their associations with diatoms in the Southern Ocean as revealed by an autonomous sampler Liu, Yan Blain, Stéphane Crispi, Olivier Rembauville, Mathieu Obernosterer, Ingrid 2020-09 application/pdf https://archimer.ifremer.fr/doc/00643/75475/76311.pdf https://doi.org/10.1111/1462-2920.15184 https://archimer.ifremer.fr/doc/00643/75475/ eng eng Wiley https://archimer.ifremer.fr/doc/00643/75475/76311.pdf doi:10.1111/1462-2920.15184 https://archimer.ifremer.fr/doc/00643/75475/ info:eu-repo/semantics/openAccess restricted use Environmental Microbiology (1462-2912) (Wiley), 2020-09 , Vol. 22 , N. 9 , P. 3968-3984 text Publication info:eu-repo/semantics/article 2020 ftarchimer https://doi.org/10.1111/1462-2920.15184 2021-09-23T20:35:40Z The Southern Ocean remains one of the least explored marine environments. The investigation of temporal microbial dynamics has thus far been hampered by the limited access to this remote ocean. We present here high‐resolution seasonal observations of the prokaryotic community composition during phytoplankton blooms induced by natural iron fertilization. A total of 18 seawater samples was collected by a moored remote autonomous sampler over 4 months at 5‐11 day intervals in offshore surface waters (central Kerguelen Plateau). Illumina sequencing of the 16S rRNA gene revealed that among the most abundant ASVs, SAR92 and Aurantivirga were the first bloom responders, Pseudomonadaceae, Nitrincolaceae, and Polaribacter had successive peaks during the spring bloom decline, and Amylibacter increased in relative abundance later in the season. SAR11 and SUP05 were abundant prior to and after the blooms. Using network analysis, we identified two groups of diatoms representative of the spring and summer bloom that had opposite correlation patterns with prokaryotic taxa. Our study provides the first seasonal picture of microbial community dynamics in the open Southern Ocean and thereby offers biological insights to the cycling of carbon and iron, and to an important puzzling issue that is the modest nitrate decrease associated to iron fertilization. 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 Environmental Microbiology 22 9 3968 3984 |
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 |
The Southern Ocean remains one of the least explored marine environments. The investigation of temporal microbial dynamics has thus far been hampered by the limited access to this remote ocean. We present here high‐resolution seasonal observations of the prokaryotic community composition during phytoplankton blooms induced by natural iron fertilization. A total of 18 seawater samples was collected by a moored remote autonomous sampler over 4 months at 5‐11 day intervals in offshore surface waters (central Kerguelen Plateau). Illumina sequencing of the 16S rRNA gene revealed that among the most abundant ASVs, SAR92 and Aurantivirga were the first bloom responders, Pseudomonadaceae, Nitrincolaceae, and Polaribacter had successive peaks during the spring bloom decline, and Amylibacter increased in relative abundance later in the season. SAR11 and SUP05 were abundant prior to and after the blooms. Using network analysis, we identified two groups of diatoms representative of the spring and summer bloom that had opposite correlation patterns with prokaryotic taxa. Our study provides the first seasonal picture of microbial community dynamics in the open Southern Ocean and thereby offers biological insights to the cycling of carbon and iron, and to an important puzzling issue that is the modest nitrate decrease associated to iron fertilization. |
format |
Article in Journal/Newspaper |
author |
Liu, Yan Blain, Stéphane Crispi, Olivier Rembauville, Mathieu Obernosterer, Ingrid |
spellingShingle |
Liu, Yan Blain, Stéphane Crispi, Olivier Rembauville, Mathieu Obernosterer, Ingrid Seasonal dynamics of prokaryotes and their associations with diatoms in the Southern Ocean as revealed by an autonomous sampler |
author_facet |
Liu, Yan Blain, Stéphane Crispi, Olivier Rembauville, Mathieu Obernosterer, Ingrid |
author_sort |
Liu, Yan |
title |
Seasonal dynamics of prokaryotes and their associations with diatoms in the Southern Ocean as revealed by an autonomous sampler |
title_short |
Seasonal dynamics of prokaryotes and their associations with diatoms in the Southern Ocean as revealed by an autonomous sampler |
title_full |
Seasonal dynamics of prokaryotes and their associations with diatoms in the Southern Ocean as revealed by an autonomous sampler |
title_fullStr |
Seasonal dynamics of prokaryotes and their associations with diatoms in the Southern Ocean as revealed by an autonomous sampler |
title_full_unstemmed |
Seasonal dynamics of prokaryotes and their associations with diatoms in the Southern Ocean as revealed by an autonomous sampler |
title_sort |
seasonal dynamics of prokaryotes and their associations with diatoms in the southern ocean as revealed by an autonomous sampler |
publisher |
Wiley |
publishDate |
2020 |
url |
https://archimer.ifremer.fr/doc/00643/75475/76311.pdf https://doi.org/10.1111/1462-2920.15184 https://archimer.ifremer.fr/doc/00643/75475/ |
geographic |
Kerguelen Southern Ocean |
geographic_facet |
Kerguelen Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Environmental Microbiology (1462-2912) (Wiley), 2020-09 , Vol. 22 , N. 9 , P. 3968-3984 |
op_relation |
https://archimer.ifremer.fr/doc/00643/75475/76311.pdf doi:10.1111/1462-2920.15184 https://archimer.ifremer.fr/doc/00643/75475/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1111/1462-2920.15184 |
container_title |
Environmental Microbiology |
container_volume |
22 |
container_issue |
9 |
container_start_page |
3968 |
op_container_end_page |
3984 |
_version_ |
1766205610324393984 |