Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/51639
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dc.contributor.authorBaltar, Federicoen_US
dc.contributor.authorAristegui, Javieren_US
dc.contributor.authorGasol, Josep M.en_US
dc.contributor.authorSintes, Evaen_US
dc.contributor.authorVan Aken, Hendrik M.en_US
dc.contributor.authorHerndl, Gerhard J.en_US
dc.contributor.otherBaltar, Federico-
dc.contributor.otherGasol, Josep M-
dc.contributor.otherAristegui, Javier-
dc.contributor.otherSintes, Eva-
dc.contributor.otherHerndl, Gerhard-
dc.date.accessioned2018-11-25T02:25:36Z-
dc.date.available2018-11-25T02:25:36Z-
dc.date.issued2010en_US
dc.identifier.issn0948-3055en_US
dc.identifier.urihttp://hdl.handle.net/10553/51639-
dc.description.abstractThe distribution of prokaryotic abundance (PA), prokaryotic heterotrophic production (PHP), and suspended particulate organic material (POM), as well as total and dissolved (operationally defined as passing through 0.2 µm pore size filters) potential extracellular enzymatic activities (EEA; α- and β-glucosidase [AGase and BGase], leucine aminopeptidase [LAPase], and alkaline phosphatase [APase]) were determined in the meso- and bathypelagic waters of the (sub)tropical Atlantic along an eastern zonal transatlantic transect and a western N-S transect. Significant differences between both transects were found for POM concentration but not for PA, PHP (except in the subsurface and oxygen minimum layer), and dissolved and total EEA. PHP decreased by 3 orders of magnitude from the lower euphotic zone to bathypelagic waters, while PA and cell-specific PHP decreased only by 1 and 2 orders of magnitude, respectively. The proportion of the dissolved to the total EEA was high in the dark ocean for all the enzymes, ranging from 54 to 100, 56 to 100, 65 to 100 and 57 to 97% for AGase, BGase, LAPase and APase, respectively. The kinetic parameters (Vmax and Km) of both the dissolved and total fractions of LAPase and APase were very similar throughout the water column, suggesting a similar origin for both dissolved and particulate EEA. Significant correlations of both dissolved and total EEA were found with prokaryotic metabolism and the POM pool. Based on the previous notion that the fraction of dissolved EEA is higher in particle-attached than in free-living microbes, our results suggest that microbial activity in the dark ocean occurs mainly on colloidal and particulate material. This is in agreement with recent genomic evidence. However, these colloidal and particulate materials are prone to disruption during the sampling process. Hence, more selective sampling techniques are needed to specifically collect these deep-water aggregates that probably represent hotspots of microbial activity in the deep ocean.en_US
dc.languageengen_US
dc.publisher0948-3055
dc.relation.ispartofAquatic Microbial Ecologyen_US
dc.sourceAquatic Microbial Ecology [ISSN 0948-3055], v. 58 (3), p. 287-302en_US
dc.subject251001 Oceanografía biológicaen_US
dc.subject.otherDissolved extracellular enzymatic activityen_US
dc.subject.otherProkaryotic heterotrophic productionen_US
dc.subject.otherParticulate organic matteren_US
dc.subject.otherDeep oceanen_US
dc.titleHigh dissolved extracellular enzymatic activity in the deep central Atlantic oceanen_US
dc.typeinfo:eu-repo/semantics/Articleen_US
dc.typeArticleen_US
dc.identifier.doi10.3354/ame01377
dc.identifier.scopus77952395895-
dc.identifier.isi000275496100007-
dcterms.isPartOfAquatic Microbial Ecology
dcterms.sourceAquatic Microbial Ecology[ISSN 0948-3055],v. 58 (3), p. 287-302
dc.contributor.authorscopusid23476314200-
dc.contributor.authorscopusid7006816204-
dc.contributor.authorscopusid7003299234-
dc.contributor.authorscopusid15833225000-
dc.contributor.authorscopusid7202279291-
dc.contributor.authorscopusid7005513845-
dc.description.lastpage302-
dc.description.firstpage287-
dc.relation.volume58-
dc.investigacionCienciasen_US
dc.type2Artículoen_US
dc.contributor.daisngid1232580-
dc.contributor.daisngid227201-
dc.contributor.daisngid97985-
dc.contributor.daisngid935469-
dc.contributor.daisngid618266-
dc.contributor.daisngid99734-
dc.identifier.investigatorRIDC-3260-2012-
dc.identifier.investigatorRIDB-1709-2008-
dc.identifier.investigatorRIDD-5833-2013-
dc.identifier.investigatorRIDH-8494-2015-
dc.identifier.investigatorRIDB-1513-2013-
dc.utils.revisionen_US
dc.contributor.wosstandardWOS:Baltar, F
dc.contributor.wosstandardWOS:Aristegui, J
dc.contributor.wosstandardWOS:Gasol, JM
dc.contributor.wosstandardWOS:Sintes, E
dc.contributor.wosstandardWOS:van Aken, HM
dc.contributor.wosstandardWOS:Herndl, GJ
dc.date.coverdateJulio 2010
dc.identifier.ulpgces
dc.description.jcr2,089
dc.description.jcrqQ1
dc.description.scieSCIE
item.fulltextCon texto completo-
item.grantfulltextopen-
crisitem.author.deptGIR IOCAG: Oceanografía Biológica y Algología Aplicada-
crisitem.author.deptIU de Oceanografía y Cambio Global-
crisitem.author.deptDepartamento de Biología-
crisitem.author.orcid0000-0002-7526-7741-
crisitem.author.parentorgIU de Oceanografía y Cambio Global-
crisitem.author.fullNameArístegui Ruiz, Javier-
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