{"refrec":{"BRefID":13008,"RR":"<b>van der Veer, G.C.M.</b> (1973). Kiezelzuurhuishouding in de westelijke Waddenzee: onderzoek gedurende de periode van februari tot juli 1970. <i>NIOZ-rapport</i>, 1973(4). Nederlands Instituut voor Onderzoek der Zee: Texel. 13 pp.","BEntID":13008,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". <i>NIOZ-rapport</i>, 1973(4). Nederlands Instituut voor Onderzoek der Zee: Texel.  13 pp.","DocTypID":13,"DocType":"Reports","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"van der Veer, G.C.M.","OrigTitleTranslFlag":1,"Authorstringtrunc":"van der Veer, G.C.M.","Englishabstract":"During the period of February till July 1970, dissolved-silica-concentrations and numbers of diatoms in the Western Wadden Sea were studied on nine trips. In addition to silica measurements and diatom counts, some other physical and chemical factors, which may possibly influence the silica budget, were determined.","AbstractOtherLang":"Van februari tot juli 1970 werden tijdens 9 vaartochten, op ongeveer 60 stations, temperatuur, zoutgehalte en het gehalte aan opgelost kiezelzuur bepaald. Bovendien werd op een tiental stations de zichtdiepte, het gehalte aan zwevend materiaal, opgelost en totaal fosfaat en aantal zwevende diatomeeën bepaald. Uit de aantallen diatomeeën en hun gemeten celoppervlakte zijn schattingen gemaakt van de hoeveelheid, in de vorm van diatomeeën, vastgelegd kiezelzuur. In de beschouwde periode zijn twee cycli te onderscheiden, waarin een hoge concentratie opgelost kiezelzuur wordt omgezet in diatomeeënkiezel. De twee cycli worden van elkaar gescheiden door een periode van ongeveer één maand (mei) met minima aan diatomeeënkiezel. Het kiezelzuur benodigd voor de eerste cyclus (maart-april), vertoont konservatief gedrag tov het zoutgehalte en is dus afkomstig uit zoet water (vooral de grote rivieren; zowel via het Ijsselmeer als het Noordzeekustwater). Het kiezelzuur voor de tweede cyclus (juni-juli) ontstaat vooral in de Waddenzee zelf. Deze mineralisatiebijdrage tot de kiezelzuurhuishouding is vooral afkomstig uit het gebied langs de Afsluitdijk en de Friese kust.","BibLvlCode":"MS","StandardTitle":"Kiezelzuurhuishouding in de westelijke Waddenzee: onderzoek gedurende de periode van februari tot juli 1970","OrigTitleLangCode":"nl","OrigTitleLangCodeExtended":"dut","OrigTitleLangID":41,"DateLastModified":{"date":"2025-07-22 01:33:06.175990","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":null,"MonPub":1973,"DateUpdate":"2025-07-15","DateCreate":"2001-07-06","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":null,"monrec":{"MonID":13008,"ISBN":null,"PubliDate":1973,"IssueDate":null,"Volume":"1973","Issue":"4","Pagination":"13","Place":"Texel","Edition":null,"BRefXtra":null,"BRefXtraRR":null,"SerID":5697,"SerRR":"NIOZ-rapport. 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