Enhanced viral production and infection of bacterioplankton during an iron-induced phytoplankton bloom in the Southern Ocean
International audience We followed the viral response to Fe-enrichment over 3 weeks during the second iron-enrichment experiment (EisenEx) in the Southern Ocean. Although viral abundance increased in a rather constant way during the course of the experiment inside the patch, the production of bacter...
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ftinsu:oai:HAL:hal-03505024v1 2023-11-05T03:45:12+01:00 Enhanced viral production and infection of bacterioplankton during an iron-induced phytoplankton bloom in the Southern Ocean Weinbauer, Markus, G Arrieta, Jesus-Maria Griebler, Christian Herndl, Gerhard J. Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Helmholtz Zentrum München = German Research Center for Environmental Health Royal Netherlands Institute for Sea Research (NIOZ) 2009 https://hal.science/hal-03505024 https://doi.org/10.4319/lo.2009.54.3.0774 en eng HAL CCSD Association for the Sciences of Limnology and Oceanography info:eu-repo/semantics/altIdentifier/doi/10.4319/lo.2009.54.3.0774 hal-03505024 https://hal.science/hal-03505024 doi:10.4319/lo.2009.54.3.0774 ISSN: 0024-3590 EISSN: 1939-5590 Limnology and Oceanography https://hal.science/hal-03505024 Limnology and Oceanography, 2009, 54 (3), pp.774-784. ⟨10.4319/lo.2009.54.3.0774⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2009 ftinsu https://doi.org/10.4319/lo.2009.54.3.0774 2023-10-11T16:31:33Z International audience We followed the viral response to Fe-enrichment over 3 weeks during the second iron-enrichment experiment (EisenEx) in the Southern Ocean. Although viral abundance increased in a rather constant way during the course of the experiment inside the patch, the production of bacterial viruses and the fraction of infected cells in bacterioplankton exhibited pronounced maxima on days 7 and 21. In contrast, these parameters remained fairly constant outside the Fe-fertilized patch. Viral production was also stimulated directly after the Fe-enrichment. Within the Fe-replete patch, viral abundance and production was on average 2- and 3-fold, respectively, higher than outside the patch. On average 40% of the bacteria contained viruses in a lytic stage inside the Fe-replete patch compared to 21% outside the patch. About 11-12% of the bacteria contained a viral genome inducible with mitomycin C in both inside and outside the patch. Randomly amplified polymorphic desoxyribonucleic acid polymerase chain reaction analysis suggested the development of a specific viral community in the patch. Although short-term stimulation of viral production was likely due to increased bacterial activity, the long-term stimulation was likely also influenced by an increased encounter rate between bacterial viruses and hosts. Viral lysis was responsible for most of the bacterioplankton mortality in the patch. Overall, most of the bacterial carbon production entered the detrital or dissolved organic matter pool via the viral shunt in the patch. Article in Journal/Newspaper Southern Ocean Institut national des sciences de l'Univers: HAL-INSU Limnology and Oceanography 54 3 774 784 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Weinbauer, Markus, G Arrieta, Jesus-Maria Griebler, Christian Herndl, Gerhard J. Enhanced viral production and infection of bacterioplankton during an iron-induced phytoplankton bloom in the Southern Ocean |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience We followed the viral response to Fe-enrichment over 3 weeks during the second iron-enrichment experiment (EisenEx) in the Southern Ocean. Although viral abundance increased in a rather constant way during the course of the experiment inside the patch, the production of bacterial viruses and the fraction of infected cells in bacterioplankton exhibited pronounced maxima on days 7 and 21. In contrast, these parameters remained fairly constant outside the Fe-fertilized patch. Viral production was also stimulated directly after the Fe-enrichment. Within the Fe-replete patch, viral abundance and production was on average 2- and 3-fold, respectively, higher than outside the patch. On average 40% of the bacteria contained viruses in a lytic stage inside the Fe-replete patch compared to 21% outside the patch. About 11-12% of the bacteria contained a viral genome inducible with mitomycin C in both inside and outside the patch. Randomly amplified polymorphic desoxyribonucleic acid polymerase chain reaction analysis suggested the development of a specific viral community in the patch. Although short-term stimulation of viral production was likely due to increased bacterial activity, the long-term stimulation was likely also influenced by an increased encounter rate between bacterial viruses and hosts. Viral lysis was responsible for most of the bacterioplankton mortality in the patch. Overall, most of the bacterial carbon production entered the detrital or dissolved organic matter pool via the viral shunt in the patch. |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Helmholtz Zentrum München = German Research Center for Environmental Health Royal Netherlands Institute for Sea Research (NIOZ) |
format |
Article in Journal/Newspaper |
author |
Weinbauer, Markus, G Arrieta, Jesus-Maria Griebler, Christian Herndl, Gerhard J. |
author_facet |
Weinbauer, Markus, G Arrieta, Jesus-Maria Griebler, Christian Herndl, Gerhard J. |
author_sort |
Weinbauer, Markus, G |
title |
Enhanced viral production and infection of bacterioplankton during an iron-induced phytoplankton bloom in the Southern Ocean |
title_short |
Enhanced viral production and infection of bacterioplankton during an iron-induced phytoplankton bloom in the Southern Ocean |
title_full |
Enhanced viral production and infection of bacterioplankton during an iron-induced phytoplankton bloom in the Southern Ocean |
title_fullStr |
Enhanced viral production and infection of bacterioplankton during an iron-induced phytoplankton bloom in the Southern Ocean |
title_full_unstemmed |
Enhanced viral production and infection of bacterioplankton during an iron-induced phytoplankton bloom in the Southern Ocean |
title_sort |
enhanced viral production and infection of bacterioplankton during an iron-induced phytoplankton bloom in the southern ocean |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.science/hal-03505024 https://doi.org/10.4319/lo.2009.54.3.0774 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0024-3590 EISSN: 1939-5590 Limnology and Oceanography https://hal.science/hal-03505024 Limnology and Oceanography, 2009, 54 (3), pp.774-784. ⟨10.4319/lo.2009.54.3.0774⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.4319/lo.2009.54.3.0774 hal-03505024 https://hal.science/hal-03505024 doi:10.4319/lo.2009.54.3.0774 |
op_doi |
https://doi.org/10.4319/lo.2009.54.3.0774 |
container_title |
Limnology and Oceanography |
container_volume |
54 |
container_issue |
3 |
container_start_page |
774 |
op_container_end_page |
784 |
_version_ |
1781706813168680960 |