Enhanced viral production and infection of bacterioplankton during an iron-induced phytoplankton bloom in the Southern Ocean

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 fra...

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Autores: Weinbauer, Markus G., Arrieta López de Uralde, Jesús M., Griebler, Christian, Herndl, Gerhard J.
Tipo de recurso: artículo
Fecha de publicación:2009
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/87320
Acceso en línea:http://hdl.handle.net/10261/87320
Access Level:acceso abierto
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spelling Enhanced viral production and infection of bacterioplankton during an iron-induced phytoplankton bloom in the Southern OceanWeinbauer, Markus G.Arrieta López de Uralde, Jesús M.Griebler, ChristianHerndl, Gerhard J.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. © 2009, by the American Society of Limnology and Oceanography, Inc.Peer ReviewedAmerican Society of Limnology and Oceanography2013201320092013info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/87320reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://aslo.org/lo/toc/vol_54/issue_3/0774.pdfinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/873202026-05-22T06:33:51Z
dc.title.none.fl_str_mv Enhanced viral production and infection of bacterioplankton during an iron-induced phytoplankton bloom in the Southern Ocean
title Enhanced viral production and infection of bacterioplankton during an iron-induced phytoplankton bloom in the Southern Ocean
spellingShingle Enhanced viral production and infection of bacterioplankton during an iron-induced phytoplankton bloom in the Southern Ocean
Weinbauer, Markus G.
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
dc.creator.none.fl_str_mv Weinbauer, Markus G.
Arrieta López de Uralde, Jesús M.
Griebler, Christian
Herndl, Gerhard J.
author Weinbauer, Markus G.
author_facet Weinbauer, Markus G.
Arrieta López de Uralde, Jesús M.
Griebler, Christian
Herndl, Gerhard J.
author_role author
author2 Arrieta López de Uralde, Jesús M.
Griebler, Christian
Herndl, Gerhard J.
author2_role author
author
author
description 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. © 2009, by the American Society of Limnology and Oceanography, Inc.
publishDate 2009
dc.date.none.fl_str_mv 2009
2013
2013
2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/87320
url http://hdl.handle.net/10261/87320
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://aslo.org/lo/toc/vol_54/issue_3/0774.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Society of Limnology and Oceanography
publisher.none.fl_str_mv American Society of Limnology and Oceanography
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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