Biogeneration of chromophoric dissolved organic matter by bacteria and krill in the southern ocean

Chromophoric dissolved organic matter (CDOM), the optically active fraction of dissolved organic matter, is primarily generated by pelagic organisms in the open ocean. In this study, we experimentally determined the quantity and spectral quality of CDOM generated by bacterioplankton using two differ...

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Authors: Ortega-Retuerta, E., Frazer, Thomas K., Duarte, Carlos M., Ruiz-Halpern, Sergio, Tovar-Sánchez, Antonio, Arrieta López de Uralde, Jesús M., Reche, Isabel
Format: article
Publication Date:2009
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::0feaf4b95a6e0b5118e5a144e4edf67a
Online Access:http://hdl.handle.net/10261/87264
Access Level:Open access
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spelling Biogeneration of chromophoric dissolved organic matter by bacteria and krill in the southern oceanOrtega-Retuerta, E.Frazer, Thomas K.Duarte, Carlos M.Ruiz-Halpern, SergioTovar-Sánchez, AntonioArrieta López de Uralde, Jesús M.Reche, IsabelChromophoric dissolved organic matter (CDOM), the optically active fraction of dissolved organic matter, is primarily generated by pelagic organisms in the open ocean. In this study, we experimentally determined the quantity and spectral quality of CDOM generated by bacterioplankton using two different substrates (with and without photoproducts) and by Antarctic krill Euphausia superba and evaluated their potential contributions to CDOM dynamics in the peninsular region of the Southern Ocean. CDOM was generated by bacteria in all experiments, and the presence of photoproducts influenced both the quantity and the spectral quality of the resultant CDOM. We confirmed a direct link between bacterial production and CDOM generation, which yielded in situ CDOM duplication times from 31 to 33 d. Antarctic krill as a direct source of CDOM was also confirmed experimentally. We estimated that CDOM generation by krill would lead to CDOM duplication times from 0.48 to 0.80 d within krill swarms. Our findings highlight the potential significance of bacteria and Antarctic krill swarms in the generation of CDOM and underscore the dynamic nature of CDOM in this area.Peer ReviewedAmerican Society of Limnology and Oceanography2013201320092013info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/87264reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://aslo.org/lo/toc/vol_54/issue_6/1941.pdfinfo:eu-repo/semantics/openAccessoai:dnet:digitalcsic_::0feaf4b95a6e0b5118e5a144e4edf67a2026-05-22T06:33:51Z
dc.title.none.fl_str_mv Biogeneration of chromophoric dissolved organic matter by bacteria and krill in the southern ocean
title Biogeneration of chromophoric dissolved organic matter by bacteria and krill in the southern ocean
spellingShingle Biogeneration of chromophoric dissolved organic matter by bacteria and krill in the southern ocean
Ortega-Retuerta, E.
title_short Biogeneration of chromophoric dissolved organic matter by bacteria and krill in the southern ocean
title_full Biogeneration of chromophoric dissolved organic matter by bacteria and krill in the southern ocean
title_fullStr Biogeneration of chromophoric dissolved organic matter by bacteria and krill in the southern ocean
title_full_unstemmed Biogeneration of chromophoric dissolved organic matter by bacteria and krill in the southern ocean
title_sort Biogeneration of chromophoric dissolved organic matter by bacteria and krill in the southern ocean
dc.creator.none.fl_str_mv Ortega-Retuerta, E.
Frazer, Thomas K.
Duarte, Carlos M.
Ruiz-Halpern, Sergio
Tovar-Sánchez, Antonio
Arrieta López de Uralde, Jesús M.
Reche, Isabel
author Ortega-Retuerta, E.
author_facet Ortega-Retuerta, E.
Frazer, Thomas K.
Duarte, Carlos M.
Ruiz-Halpern, Sergio
Tovar-Sánchez, Antonio
Arrieta López de Uralde, Jesús M.
Reche, Isabel
author_role author
author2 Frazer, Thomas K.
Duarte, Carlos M.
Ruiz-Halpern, Sergio
Tovar-Sánchez, Antonio
Arrieta López de Uralde, Jesús M.
Reche, Isabel
author2_role author
author
author
author
author
author
description Chromophoric dissolved organic matter (CDOM), the optically active fraction of dissolved organic matter, is primarily generated by pelagic organisms in the open ocean. In this study, we experimentally determined the quantity and spectral quality of CDOM generated by bacterioplankton using two different substrates (with and without photoproducts) and by Antarctic krill Euphausia superba and evaluated their potential contributions to CDOM dynamics in the peninsular region of the Southern Ocean. CDOM was generated by bacteria in all experiments, and the presence of photoproducts influenced both the quantity and the spectral quality of the resultant CDOM. We confirmed a direct link between bacterial production and CDOM generation, which yielded in situ CDOM duplication times from 31 to 33 d. Antarctic krill as a direct source of CDOM was also confirmed experimentally. We estimated that CDOM generation by krill would lead to CDOM duplication times from 0.48 to 0.80 d within krill swarms. Our findings highlight the potential significance of bacteria and Antarctic krill swarms in the generation of CDOM and underscore the dynamic nature of CDOM in this area.
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/10261/87264
url http://hdl.handle.net/10261/87264
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_6/1941.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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score 15.228081

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