{"refrec":{"BRefID":98795,"RR":"<b>Søndergaard, M.; Hansen, B.; Markager, S.</b> (1995). Dynamics of dissolved organic carbon lability in a eutrophic lake. <i>Limnol. Oceanogr. 40(1)</i>: 46-54","BEntID":94067,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Limnol. Oceanogr. 40(1)</i>: 46-54","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":1,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Søndergaard, M.; Hansen, B.; Markager, S.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Søndergaard, M.; Hansen, B.; Markager, S.","Englishabstract":"The concentration of labile dissolved organic C ([DOC<sub>L</sub>]) and the plankton community structure were measured weekly during a diatom spring bloom and the subsequent clear-water phase in a eutrophic, temperate lake. The DOC<sub>L</sub> concentration was assessed by a bacterial regrowth method based on direct measurements of the increase in bacterial biomass and its respiratory demand. [DOC<sub>L</sub>] ranged from 560 to 1,130 mu g C liter and accounted for only 5-9% of total DOC. DOC<sub>L</sub> oscillated around 800 mu g C/liter, and the amplitude over 7-d periods was within plus or minus 16% of the in situ bacterial carbon demand. One period (3 weeks) with consistently increasing [DOC<sub>L</sub>] took place concomitant with the increase in macrozooplankton and bacterial biomass. Thus, DOC<sub>L</sub> was positively related to decreases in chlorophyll and zooplankton grazing. The increase in DOC<sub>L</sub> was followed by 3 weeks with decreasing concentrations, when the relationship between DOC<sub>L</sub> and bacterial production was negative. This pattern gives support to the hypothesis that grazing is a quantitatively important process in the flow of carbon to bacteria. The variations of DOC<sub>L</sub> were analyzed with a model describing interactions among substrate, bacteria, and grazing. Short-term (days) oscillations probably result from pulses of substrate production that are followed within a few days by bacterial uptake, and long-term (weeks) variations are explained by a variable bacterial substrate affinity (K<sub>m</sub>).","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Dynamics of dissolved organic carbon lability in a eutrophic lake","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":1995,"MonPub":null,"DateUpdate":"2006-05-12","DateCreate":"2006-05-12","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:A1995QT29200004","VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":98795,"PubliDate":1995,"Pagination":"46-54","XtraPublOfAnaID":null,"ISBN":null,"Volume":"40","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43511,"SerRR":"Limnology and Oceanography. 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