{"refrec":{"BRefID":99257,"RR":"<b>George, D.G.</b> (1983). Interrelations between the vertical distribution of <i>Daphnia</i> and chlorophyll a in two large limnetic enclosures. <i>J. Plankton Res. 5(4)</i>: 457-475","BEntID":94519,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>J. Plankton Res. 5(4)</i>: 457-475","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":1,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"George, D.G.","OrigTitleTranslFlag":0,"Authorstringtrunc":"George, D.G.","Englishabstract":"This paper summarises the major factors influencing the daytime vertical distribution of <i>Daphnia hyalina</i> var. <i>lacustris</i> (Sars) in two large experimental enclosures (Lund Tubes). In both tubes, the depth at which the <i>Daphnia</i> aggregated during the day was closely related to sub-surface irradiance. On a few occasions aggregations of <i>Daphnia</i> were found in \"dark\" water associated with a deep chlorophyll maximum. On many occasions, however, the animals' light response per se ensured their aggregation at depths of maximum phytoplankton abundance. The most important factor influencing the dispersion of animals in the water column was the steepness of the light gradient. In turbid water vertical aggregations were well defined, whereas in clear water the aminals were widely dispersed around their depth of maximum abundance. <i>Daphnia</i> also tended to disperse in the water column when their population density was high or when food was scarce. The implications of these findings are discussed in relation to the effects of zooplankton grazing and speculations on the adaptive significance of depth regulation.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Interrelations between the vertical distribution of <i>Daphnia</i> and chlorophyll a in two large limnetic enclosures","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":1983,"MonPub":null,"DateUpdate":"2006-05-30","DateCreate":"2006-05-30","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":99257,"PubliDate":1983,"Pagination":"457-475","XtraPublOfAnaID":null,"ISBN":null,"Volume":"5","Issue":"4","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43255,"SerRR":"Journal of Plankton Research. 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