Diel variations in bacterial heterotrophic activity and growth in the northwestern Mediterranean Sea

18 pages, 12 figures, 3 tables.

Detalhes bibliográficos
Autores: Gasol, Josep M., Doval, M. Dolores, Pinhassi, Jarone, Calderón-Paz, Juan I., Guixa-Boixareu, Núria, Vaqué, Dolors, Pedrós-Alió, Carlos
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:1998
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/25419
Acesso em linha:http://hdl.handle.net/10261/25419
Access Level:Acceso aberto
Palavra-chave:Bacterial production
Mediterranean
Diel cycles
DOC diel changes
Nucleoid-containing bacteria
Bacterial carbon conversion efficiencies
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spelling Diel variations in bacterial heterotrophic activity and growth in the northwestern Mediterranean SeaGasol, Josep M.Doval, M. DoloresPinhassi, JaroneCalderón-Paz, Juan I.Guixa-Boixareu, NúriaVaqué, DolorsPedrós-Alió, CarlosBacterial productionMediterraneanDiel cyclesDOC diel changesNucleoid-containing bacteriaBacterial carbon conversion efficiencies18 pages, 12 figures, 3 tables.Primary producers must respond to the diel changes in light availability. Therefore, detection of diel cycles in bacterial activity would imply tight coupling between the production of photosynthetic dissolved organic carbon (DOC) and its consumption by bacteria. Absence of diel cycles, on the contrary, would indicate that bacteria depend largely upon allochthonous organic carbon and that bacteria are not tightly dependent on photosynthetically produced autochthonous carbon. In 1993 and 1994 we sampled 3 sites in the NW Mediterranean Sea several times a day, and measured several microbial parameters as well as the vertical profiles of DOC along the diel cycle. The sites were selected so that one was on the continental shelf and, thus, was more influenced by coastal runoff; a second one was over the shelf slope and a third, oceanic one was located further offshore over a depth of 2000 m. We found clear diel cycles in bacterial total and specific activity always in the oceanic stations and sometimes in the shelf slope stations. Diel changes were detected as changes in both DNA and protein synthesis rates. These diel cycles were accompanied by diel changes in the distribution of total DOC, and by diel changes in the proportion of bacteria containing visible nucleoids. Noon estimates of bacterial activity were more than twice the daily average in the oceanic site, but they were less different in the other 2 sites. DOC changed daily by 15 µM (5 to 15% of the total stock). For bacterial activity to explain the diel changes in DOC concentration, bacteria should have growth efficiencies lower than 10% in general, and lower than 2% in the oceanic station.This work was supported by grants AMB 94-1019 and 94-0853 from CICYT, PB91-075 from DGICYT and MAS2-CT93-0063 and MAS3-CT95-0016 grants from the EU to the ICM and to A. Hagströjm. M.D.D was supported by a fellowshii from the EU MAS2-CT93-0065 project.Peer reviewedInter ResearchComisión Interministerial de Ciencia y Tecnología, CICYT (España)European CommissionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201020101998info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersion1834945 bytesapplication/pdfhttp://hdl.handle.net/10261/25419reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.3354/meps164107Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/254192026-05-22T06:33:51Z
dc.title.none.fl_str_mv Diel variations in bacterial heterotrophic activity and growth in the northwestern Mediterranean Sea
title Diel variations in bacterial heterotrophic activity and growth in the northwestern Mediterranean Sea
spellingShingle Diel variations in bacterial heterotrophic activity and growth in the northwestern Mediterranean Sea
Gasol, Josep M.
Bacterial production
Mediterranean
Diel cycles
DOC diel changes
Nucleoid-containing bacteria
Bacterial carbon conversion efficiencies
title_short Diel variations in bacterial heterotrophic activity and growth in the northwestern Mediterranean Sea
title_full Diel variations in bacterial heterotrophic activity and growth in the northwestern Mediterranean Sea
title_fullStr Diel variations in bacterial heterotrophic activity and growth in the northwestern Mediterranean Sea
title_full_unstemmed Diel variations in bacterial heterotrophic activity and growth in the northwestern Mediterranean Sea
title_sort Diel variations in bacterial heterotrophic activity and growth in the northwestern Mediterranean Sea
dc.creator.none.fl_str_mv Gasol, Josep M.
Doval, M. Dolores
Pinhassi, Jarone
Calderón-Paz, Juan I.
Guixa-Boixareu, Núria
Vaqué, Dolors
Pedrós-Alió, Carlos
author Gasol, Josep M.
author_facet Gasol, Josep M.
Doval, M. Dolores
Pinhassi, Jarone
Calderón-Paz, Juan I.
Guixa-Boixareu, Núria
Vaqué, Dolors
Pedrós-Alió, Carlos
author_role author
author2 Doval, M. Dolores
Pinhassi, Jarone
Calderón-Paz, Juan I.
Guixa-Boixareu, Núria
Vaqué, Dolors
Pedrós-Alió, Carlos
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Comisión Interministerial de Ciencia y Tecnología, CICYT (España)
European Commission
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Bacterial production
Mediterranean
Diel cycles
DOC diel changes
Nucleoid-containing bacteria
Bacterial carbon conversion efficiencies
topic Bacterial production
Mediterranean
Diel cycles
DOC diel changes
Nucleoid-containing bacteria
Bacterial carbon conversion efficiencies
description 18 pages, 12 figures, 3 tables.
publishDate 1998
dc.date.none.fl_str_mv 1998
2010
2010
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/25419
url http://hdl.handle.net/10261/25419
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.3354/meps164107
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 1834945 bytes
application/pdf
dc.publisher.none.fl_str_mv Inter Research
publisher.none.fl_str_mv Inter Research
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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