Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/50052
DC FieldValueLanguage
dc.contributor.authorBenavides, Maren_US
dc.contributor.authorBronk, Deborah A.en_US
dc.contributor.authorAgawin, Nona S.R.en_US
dc.contributor.authorPerez Hernandez, Maria Doloresen_US
dc.contributor.authorHernández-Guerra, Alonsoen_US
dc.contributor.authorArístegui, Javieren_US
dc.contributor.otherAgawin, Nona Sheila-
dc.contributor.otherBenavides, Mar-
dc.contributor.otherPerez-Hernandez, Maria-
dc.contributor.otherHernandez-Guerra, Alonso-
dc.contributor.otherAristegui, Javier-
dc.date.accessioned2018-11-24T12:53:05Z-
dc.date.available2018-11-24T12:53:05Z-
dc.date.issued2013en_US
dc.identifier.issn2169-9275en_US
dc.identifier.urihttp://hdl.handle.net/10553/50052-
dc.description.abstractDinitrogen (N2) fixation and dissolved organic nitrogen (DON) release rates were measured on fractionated samples (>10 µm and <10 µm) along 24.5∘N in the subtropical North Atlantic. Net N2 fixation rates (N2 assimilation into biomass) ranged from 0.01 to 0.4 nmol N L−1 h−1, and DON release rates ranged from 0.001 to 0.09 nmol N L−1 h−1. DON release represented ∼14% and ∼23% of >10 µm and <10 µm gross N2 fixation (assimilation into biomass plus DON release), respectively. This implies that by overlooking DON release, N2 fixation rates are underestimated. Net N2 fixation rates were higher in the east and decreased significantly toward the west (rs = −0.487, p = 0.002, and rs = −0.496, p = 0.001, for the >10 µm and <10 µm fractions, respectively). The sum of both fractions correlated with aerosol optical depth at 550 nm (AOD 550 nm) (rs = 0.382, p = 0.017) and phosphate (PO43−) concentrations (rs = 0.453, p = 0.018), suggesting an enhancement of diazotrophy as a response to aerosol inputs and phosphorus availability. In contrast, DON release was constant among size fractions and did not correlate with any of these variables. We also compared N2 fixation rates obtained using the 15N2 dissolved and bubble methods. The first gave average rates 50% (49% ± 39) higher than the latter, which supports the finding that previously published N2 fixation rates are likely underestimated. We suggest that by combining N2 fixation and DON release measurements using dissolved 15N2, global N2 fixation rates could increase enough to balance oceanic fixed nitrogen budget disequilibria.en_US
dc.languageengen_US
dc.relationExpedición de Circunnavegación Malaspina 2010: Cambio Global y Exploración Del Océano Globalen_US
dc.relationIntercambio Plataforma-Oceano en El Ecosistema Marino de Las Islas Canarias-Peninsula Iberica (Caibex):Afloramiento de Cabo Guiren_US
dc.relationZonas de Mezcla y Frentes en El Océano Oscuro Como ¿Hot-Spots? de Biodiversidad y Flujos Biogeoquímicos A Través Del Mar Mediterráneo y Atlántico Nordeste - I.en_US
dc.relation.ispartofJournal of geophysical research. Oceansen_US
dc.sourceJournal of geophysical research. Oceans [ISSN 2169-9275], v. 118 (7), p. 3406-3415en_US
dc.subject2510 Oceanografíaen_US
dc.subject.otherDiazotrophyen_US
dc.subject.otherDON releaseen_US
dc.subject.otherDissolved 15N2en_US
dc.subject.otherUnicellular diazotrophsen_US
dc.subject.otherSaharan dusten_US
dc.titleLongitudinal variability of size-fractionated N2 fixation and DON release rates along 24.5°N in the subtropical North Atlanticen_US
dc.typeinfo:eu-repo/semantics/Articleen_US
dc.typeArticleen_US
dc.identifier.doi10.1002/jgrc.20253en_US
dc.identifier.scopus84885101383-
dc.identifier.isi000324885400011-
dcterms.isPartOfJournal Of Geophysical Research-Oceans-
dcterms.sourceJournal Of Geophysical Research-Oceans[ISSN 2169-9275],v. 118 (7), p. 3406-3415-
dc.contributor.authorscopusid36501571300-
dc.contributor.authorscopusid6701658779-
dc.contributor.authorscopusid6603773899-
dc.contributor.authorscopusid50861902200-
dc.contributor.authorscopusid6701736545-
dc.contributor.authorscopusid7006816204-
dc.description.lastpage3415en_US
dc.identifier.issue7-
dc.description.firstpage3406en_US
dc.relation.volume118en_US
dc.investigacionCienciasen_US
dc.type2Artículoen_US
dc.contributor.daisngid2027943-
dc.contributor.daisngid448307-
dc.contributor.daisngid1073894-
dc.contributor.daisngid3057975-
dc.contributor.daisngid660191-
dc.contributor.daisngid227201-
dc.identifier.investigatorRIDI-3168-2015-
dc.identifier.investigatorRIDK-5323-2015-
dc.identifier.investigatorRIDJ-5330-2014-
dc.identifier.investigatorRIDA-4747-2008-
dc.identifier.investigatorRIDD-5833-2013-
dc.utils.revisionen_US
dc.contributor.wosstandardWOS:Benavides, M-
dc.contributor.wosstandardWOS:Bronk, DA-
dc.contributor.wosstandardWOS:Agawin, NSR-
dc.contributor.wosstandardWOS:Perez-Hernandez, MD-
dc.contributor.wosstandardWOS:Hernandez-Guerra, A-
dc.contributor.wosstandardWOS:Aristegui, J-
dc.date.coverdateEnero 2013en_US
dc.identifier.ulpgces
dc.description.jcr3,44
dc.description.jcrqQ1
item.fulltextCon texto completo-
item.grantfulltextopen-
crisitem.author.deptIOCAG: Oceanografía Física-
crisitem.author.deptIU de Oceanografía y Cambio Global-
crisitem.author.deptFísica-
crisitem.author.deptIOCAG: Oceanografía Física-
crisitem.author.deptIU de Oceanografía y Cambio Global-
crisitem.author.deptFísica-
crisitem.author.deptIOCAG: Oceanografía Biológica y Algología Aplicada-
crisitem.author.deptIU de Oceanografía y Cambio Global-
crisitem.author.deptBiología-
crisitem.author.orcid10.1175/JPO-D-13-0136.1-
crisitem.author.orcid0000-0002-4883-8123-
crisitem.author.orcid0000-0002-7526-7741-
crisitem.author.parentorgIU de Oceanografía y Cambio Global-
crisitem.author.parentorgIU de Oceanografía y Cambio Global-
crisitem.author.parentorgIU de Oceanografía y Cambio Global-
crisitem.author.fullNamePérez Hernández, María Dolores-
crisitem.author.fullNameHernández Guerra, Alonso-
crisitem.author.fullNameArístegui Ruiz, Javier-
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