{"refrec":{"BRefID":16185,"RR":"<b>Rijstenbil, J.W.</b> (1988). Selection of phytoplankton species in culture by gradual salinity changes. <i>Neth. J. Sea Res. 22(3)</i>: 291-300","BEntID":16185,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". <i>Neth. J. Sea Res. 22(3)</i>: 291-300","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Rijstenbil, J.W.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Rijstenbil, J.W.","Englishabstract":"Continuous cultures of mixed phytoplankton populations were subjected to gradual salinity changes. The phytoplankton was exposed to defined regimes of high, low or fluctuating salinity, in artificial brackish media. In several experiments ammonium was the limiting nutrient. A rapid selection process was observed in natural phytoplankton assemblages. A gradual freshening caused the dominance of <i>Chaetoceros mülleri</i> at low salinity (S=5). <i>Skeletonema costatum</i> became dominant at higher, constant or fluctuating salinities, accompanied by <i>Ditylum brightwellii</i> in low cell numbers. Ammonium limitation was not achieved in this experiment. Competition for ammonium was studied in a second experiment, using an inoculum of two species. At S=18 <i>D. brightwellii</i> became the dominant species in this competition. A minor shift towards S=15 reversed the affinities for ammonium, and <i>S. costatum</i> won the competition. At S=8 <i>S. costatum</i> had the highest affinity for ammonium after a period of osmotic adjustment. Ammonium became limiting when salinities arrived at constant meso-or polyhaline levels. Both species were able to grow in fluctuating osmotic environments (S=5 to 19). The growth of <i>D. brightwellii</i> decreased below S=8 and after repeated variations of the salinity. These salinity fluctuations suppressed growth and ammonium uptake of both species, thus preventing ammonium limitation. These competition experiments indicate that unstable salinity may stimulate the mass development of <i>S. costatum</i> in brackish lakes.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Selection of phytoplankton species in culture by gradual salinity changes","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":1988,"MonPub":null,"DateUpdate":"2019-07-10","DateCreate":"2001-08-21","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:A1988R478500010","VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":16185,"PubliDate":1988,"Pagination":"291-300","XtraPublOfAnaID":null,"ISBN":null,"Volume":"22","Issue":"3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":44573,"SerRR":"Netherlands Journal of Sea Research. 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