{"refrec":{"BRefID":99025,"RR":"<b>Christaki, U.; Van Wambeke, F.</b> (1995). Simulated phytoplankton bloom input in top-down manipulated microcosms: comparative effect of zooflagellates, ciliates and copepods. <i>Aquat. Microb. Ecol. 9(2)</i>: 137-147","BEntID":94292,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Aquat. Microb. Ecol. 9(2)</i>: 137-147","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Christaki, U.; Van Wambeke, F.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Christaki, U.; Van Wambeke, F.","Englishabstract":"Succession of microbial populations and carbon flow were studied experimentally in a 2-stage linked system where phytoplankton growth was separated from decay or consumption. Three phytoplankton loss processes were considered: bacterial lysis, protozoan grazing and mesozooplankton grazing. An axenic culture of the diatom Phaeodactylum tricornutum was transferred to 3 second-stage microcosms (150 l) kept in the dark. The first vessel (L: lysis batch) contained no herbivores and was top-limited by bacterivorous flagellates, the second (G: grazing batch) by ciliates and the third (Z: zooplankton batch) by copepods. In the L container there was no evidence of grazing on phytoplankton; the particle-associated protozoa were abundant (3.7 x 10<sup>3</sup> cell l<sup>-1</sup>). In the G vessel, ciliates (up to 96 x 10<sup>3</sup> cell l<sup>-1</sup>) controlled both the phytoplankton and nanoflagellate populations and ciliates ingested phytoplankton at rates from 1.7 to 16 phytoplankton cell ciliate<sup>-1</sup> h<sup>-1</sup> (average, 7.5 cell ciliate<sup>-1</sup> h<sup>-1</sup>). The average growth yields for bacterivorous flagellates and ciliates were 35% and 45%, respectively. In the Z treatment, the concentration of >10 mu m protozoa (able to ingest <i>P. Tricornutum</i>) was apparently kept low due to copepod grazing pressure. Consequently, a considerable fraction of the phytoplankton was channelled through the detrital pathway instead of the classical herbivorous pathway. The general trend of the parameters describing microbial activity was Z > G > L. An influence of the complexity of the system on the turnover rate of organic matter was evident with the ratio 'cumulative biomass/POC' in the different vessels showing a lower level of detritus when predators of phytoplankton were present.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Simulated phytoplankton bloom input in top-down manipulated microcosms: comparative effect of zooflagellates, ciliates and copepods","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":"2006-05-19","DateCreate":"2006-05-19","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:A1995RV02500005","VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":99025,"PubliDate":1995,"Pagination":"137-147","XtraPublOfAnaID":null,"ISBN":null,"Volume":"9","Issue":"2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42201,"SerRR":"Aquatic Microbial Ecology. 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