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dc.contributor.author
Malits, Andrea
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dc.contributor.author
Christaki, U.
dc.contributor.author
Obernosterer, I.
dc.contributor.author
Weinbauer, M. G.
dc.date.available
2016-08-01T20:49:42Z
dc.date.issued
2014-12
dc.identifier.citation
Malits, Andrea; Christaki, U.; Obernosterer, I.; Weinbauer, M. G. ; Enhanced viral production and virus-mediated mortality of bacterioplankton in a natural iron-fertilized bloom event above the Kerguelen Plateau; Copernicus Publications; Biogeosciences; 11; 12-2014; 6841-6853
dc.identifier.issn
1726-4170
dc.identifier.uri
http://hdl.handle.net/11336/6858
dc.description.abstract
Above the Kerguelen Plateau in the Southern Ocean natural iron fertilization sustains a large phytoplankton bloom over 3 months during austral summer. During the KEOPS1 project (KErguelen Ocean and Plateau compared Study1) we sampled this phytoplankton bloom during its declining phase along with the surrounding high-nutrient?low-chlorophyll (HNLC) waters to study the effect of natural iron fertilization on the role of viruses in the microbial food web. Bacterial and viral abundances were 1.7 and 2.1 times, respectively, higher within the bloom than in HNLC waters. Viral production and virus-mediated mortality of bacterioplankton were 4.1 and 4.9 times, respectively, higher in the bloom, while the fraction of infected cells (FIC) and the fraction of lysogenic cells (FLC) showed no significant differences between environments. The present study suggests viruses to be more important for bacterial mortality within the bloom and dominate over grazing of heterotrophic nanoflagellates (HNFs) during the late bloom phase. As a consequence, at least at a late bloom stage, viral lysis shunts part of the photosynthetically fixed carbon in iron-fertilized regions into the dissolved organic matter (DOM) pool with potentially less particulate organic carbon transferred to larger members of the food web or exported.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Copernicus Publications
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
Fe-Fertilization
dc.subject
Viral Mediated Mortality
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Cycling of Organic Carbon
dc.subject.classification
Oceanografía, Hidrología, Recursos Hídricos
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Enhanced viral production and virus-mediated mortality of bacterioplankton in a natural iron-fertilized bloom event above the Kerguelen Plateau
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-08-01T18:17:18Z
dc.identifier.eissn
1726-4189
dc.journal.volume
11
dc.journal.pagination
6841-6853
dc.journal.pais
Alemania
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dc.journal.ciudad
Gottingen
dc.description.fil
Fil: Malits, Andrea. Sorbonne Universités; Francia. Observatoire océanographique; Francia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
dc.description.fil
Fil: Christaki, U.. Université du Littoral. Laboratoire d’Océanologie et des Géosciences; Francia
dc.description.fil
Fil: Obernosterer, I.. Sorbonne Universités; Francia. Observatoire océanographique; Francia
dc.description.fil
Fil: Weinbauer, M. G. . Sorbonne Universités; Francia. Observatoire océanographique; Francia
dc.journal.title
Biogeosciences
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.biogeosciences.net/11/6841/2014/
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-11-6841-2014
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.5194/bg-11-6841-2014
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