{"refrec":{"BRefID":258070,"RR":"<b>Lovdal, T.; Eichner, C.; Grossart, H.; Carbonnel, V.; Chou, L.; Martin-Jezequel, V.; Thingstad, T.</b> (2008). Competition for inorganic and organic forms of nitrogen and phosphorous between phytoplankton and bacteria during an <i>Emiliania huxleyi</i> spring bloom. <i>Biogeosciences 5(2)</i>: 371-383. <a href=\"http://dx.doi.org/10.5194/bg-5-371-2008\" target=\"_blank\">http://dx.doi.org/10.5194/bg-5-371-2008</a>","BEntID":250080,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Biogeosciences 5(2)</i>: 371-383. <a href=\"http://dx.doi.org/10.5194/bg-5-371-2008\" target=\"_blank\">http://dx.doi.org/10.5194/bg-5-371-2008</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Lovdal, T.; Eichner, C.; Grossart, H.; Carbonnel, V.; Chou, L.; Martin-Jezequel, V.; Thingstad, T.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Lovdal, T. <i>et al.</i>","Englishabstract":"Using <sup>15</sup>N and <sup>33</sup>P, we measured the turnover of organic and inorganic nitrogen (N) and phosphorus (P) substrates, and the partitioning of N and P from these sources into two size fractions of marine osmotrophs during the course of a phytoplankton bloom in a nutrient manipulated mesocosm. The larger size fraction (>0.8 µm), mainly consisting of the coccolithophorid <i>Emiliania huxleyi</i>, but also including an increasing amount of large particle-associated bacteria as the bloom proceeded, dominated uptake of the inorganic forms NH<sub>4</sub><sup>+</sup>, NO<sub>3</sub><sup>-</sup>, and PO<sub>4</sub><sup>3-</sup>. The uptake of N from leucine, and P from ATP and dissolved DNA, was initially dominated by the 0.8–0.2 µm size fraction, but shifted towards dominance by the >0.8 µm size fraction as the system turned to an increasing degree of N-deficiency. Normalizing uptake to biomass of phytoplankton and heterotrophic bacteria revealed that organisms in the 0.8–0.2 µm size fraction had higher specific affinity for leucine-N than those in the >0.8 µm size fraction when N was deficient, whereas the opposite was the case for NH<sub>4</sub><sup>+</sup>. There was no such difference regarding the specific affinity for P substrates. Since heterotrophic bacteria seem to acquire N from organic compounds like leucine more efficiently than phytoplankton, our results suggest different structuring of the microbial food chain in N-limited relative to P-limited environments.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Competition for inorganic and organic forms of nitrogen and phosphorous between phytoplankton and bacteria during an <i>Emiliania huxleyi</i> spring bloom","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2008,"MonPub":null,"DateUpdate":"2016-06-22","DateCreate":"2016-05-29","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000255511200007","VABBcode":null,"OpenAcc":1,"DOI":"10.5194/bg-5-371-2008"},"refs":null,"anarec":{"AnaID":258070,"PubliDate":2008,"Pagination":"371-383","XtraPublOfAnaID":null,"ISBN":null,"Volume":"5","Issue":"2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":68092,"SerRR":"<b>Gattuso, J.P.; Kesselmeier, J. (Ed.)</b> Biogeosciences. Copernicus Publications: Göttingen.  ISSN 1726-4170; e-ISSN 1726-4189","StandardTitleSer":"Biogeosciences","ISSN":"1726-4170","AbbrevSer":"Biogeosciences","StandardTitleMon":null,"StartPage":371,"Pages":13,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Lovdal","Firstname":null,"Initials":"T.","Affiliation":"Univ Bergen, Dept Biol, N-5020 Bergen, Norway.","Discriminator":null,"CorporateFlag":0,"BEntID":250080,"AutID":228742,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Eichner","Firstname":null,"Initials":"C.","Affiliation":"Univ Bergen, Dept Biol, N-5020 Bergen, Norway.","Discriminator":null,"CorporateFlag":0,"BEntID":250080,"AutID":228743,"OrderNr":2,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Grossart","Firstname":null,"Initials":"H.","Affiliation":"Leibniz Inst Freshwater Ecol & Inland Fisheries, Dept Limnol Stratified Lakes, D-16775 Stechlin, Germany.","Discriminator":null,"CorporateFlag":0,"BEntID":250080,"AutID":228744,"OrderNr":3,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Carbonnel","Firstname":"Vincent","Initials":"V.","Affiliation":"Laboratoire d’Océanographie Chimique et Géochimie des Eaux, Université Libre de Bruxelles","Discriminator":null,"CorporateFlag":0,"BEntID":250080,"AutID":162680,"OrderNr":4,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"LoCGE","InsFSN":"Université Libre de Bruxelles; 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