{"refrec":{"BRefID":98876,"RR":"<b>Vincent, W.F.; Bertrand, N.; Frenette, J.-J.</b> (1994). Photoadaptation to intermittent light across the St. Lawrence Estuary freshwater-saltwater transition zone. <i>Mar. Ecol. Prog. Ser. 110(2-3)</i>: 283-292","BEntID":94147,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Mar. Ecol. Prog. Ser. 110(2-3)</i>: 283-292","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":1,"BrackishFlag":1,"TerrestrialFlag":0,"Authorstring":"Vincent, W.F.; Bertrand, N.; Frenette, J.-J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Vincent, W.F.; Bertrand, N.; Frenette, J.-J.","Englishabstract":"We evaluated 2 competing hypotheses for the photoadaptive characteristics of phytoplankton distributed across the turbid freshwater-saltwater transition zone (TZ) of the St. Lawrence River (Canada): that the communities were photosynthetically adapted to a low mean water column irradiance, or that they were adapted to intermittent exposure to near-surface irradiance conditions. Two cruises were undertaken in spring-early summer, a period that corresponded to major seasonal changes in the optical environment of the St. Lawrence River. There was a large increase in chlorophyll a (chl a) concentration, maximum photosynthetic rates (P<sup>B</sup><sub>max</sub>), and the light saturation parameter (I<sub>k</sub>) between the 2 cruises. During this period the nanoplankton (cells in the size range 2 to 20 mu m) rose from 33 to 69%, of total chl a. There were no major shifts in photosynthetic characteristics across the transition from freshwater to turbid saltwater conditions, but rather the cells maintained high values of P<sup>B</sup><sub>max</sub>  and I<sub>k</sub>, with low alpha (the light limitation parameter) and little inhibitory response to high photon fluence rates. These observations support the hypothesis that the phytoplankton community in this and perhaps other turbid environments are photoadapted to 'intermittent sun' conditions, rather than the 'shade environment' experienced on average through the water column.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Photoadaptation to intermittent light across the St. Lawrence Estuary freshwater-saltwater transition zone","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:33:14.980000","timezone_type":1,"timezone":"+00:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1994,"MonPub":null,"DateUpdate":"2006-05-15","DateCreate":"2006-05-15","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":98876,"PubliDate":1994,"Pagination":"283-292","XtraPublOfAnaID":null,"ISBN":null,"Volume":"110","Issue":"2-3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43354,"SerRR":"Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe.  ISSN 0171-8630; e-ISSN 1616-1599","StandardTitleSer":"Marine Ecology Progress Series","ISSN":"0171-8630","AbbrevSer":"Mar. Ecol. Prog. Ser.","StandardTitleMon":null,"StartPage":283,"Pages":10,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":{"Line1":"Sainte-Foy","Email":null,"Line2":null,"EnvName":"Canada"},"othpubs":null,"ownerships":null,"authors":[{"AutName":"Vincent","Firstname":"Warwick","Initials":"W.F.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":94147,"AutID":626,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Bertrand","Firstname":"Normand","Initials":"N.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":94147,"AutID":66269,"OrderNr":2,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Frenette","Firstname":"Jean-Jacques","Initials":"J.-J.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":94147,"AutID":36710,"OrderNr":3,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null}],"mapdetails":null,"datasets":null,"monographs":null,"monparts":null,"serparts":null,"BEntOpen":null,"BEntPrivate":null,"availability":null,"litstyles":null,"thespers":null,"arch2discl":null,"SERpubls":[{"PublName":"Inter-Research","City":"Oldendorf/Luhe"}],"MONpubls":null,"pictures":[],"thestermsPath":[{"ThesaurusTerm":"ANW, Canada, Quebec, St. Lawrence Estuary","ThestID":182338,"Acronym":"ASFA_GEOT","ThesTermPath":"ANW, Canada, Quebec, St. Lawrence Estuary"},{"ThesaurusTerm":"Nannoplankton","ThestID":5412,"Acronym":"ASFA","ThesTermPath":"Aquatic communities > Plankton > Nannoplankton"},{"ThesaurusTerm":"Phytoplankton","ThestID":6208,"Acronym":"ASFA","ThesTermPath":"Aquatic communities > Plankton > Phytoplankton"},{"ThesaurusTerm":"Seston","ThestID":7500,"Acronym":"ASFA","ThesTermPath":"Aquatic communities > Seston"},{"ThesaurusTerm":"Adaptations","ThestID":135,"Acronym":"ASFA","ThesTermPath":"Biological phenomena > Adaptations"},{"ThesaurusTerm":"Acclimatization","ThestID":46,"Acronym":"ASFA","ThesTermPath":"Biological phenomena > Adaptations > Acclimatization"},{"ThesaurusTerm":"Salinity data","ThestID":7095,"Acronym":"ASFA","ThesTermPath":"Data > Hydrographic data > Salinity data"},{"ThesaurusTerm":"Light effects","ThestID":4719,"Acronym":"ASFA","ThesTermPath":"Environmental effects > Light effects"},{"ThesaurusTerm":"Irradiance","ThestID":4466,"Acronym":"ASFA","ThesTermPath":"Irradiance"},{"ThesaurusTerm":"Chlorophylls","ThestID":1537,"Acronym":"ASFA","ThesTermPath":"Organic compounds > Carbohydrates > Glycosides > Pigments > Photosynthetic pigments > Chlorophylls"},{"ThesaurusTerm":"Biomass","ThestID":999,"Acronym":"ASFA","ThesTermPath":"Population characteristics > Biomass"},{"ThesaurusTerm":"Vertical profiles","ThestID":8976,"Acronym":"ASFA","ThesTermPath":"Profiles > Vertical profiles"},{"ThesaurusTerm":"Exposure tolerance","ThestID":2998,"Acronym":"ASFA","ThesTermPath":"Properties > Biological properties > Tolerance > Exposure tolerance"},{"ThesaurusTerm":"Turbidity","ThestID":8796,"Acronym":"ASFA","ThesTermPath":"Properties > Physical properties > Turbidity"},{"ThesaurusTerm":"Water temperature","ThestID":9146,"Acronym":"ASFA","ThesTermPath":"Properties > Water properties > Temperature > Water temperature"},{"ThesaurusTerm":"Spatial variations","ThestID":7855,"Acronym":"ASFA","ThesTermPath":"Spatial variations"},{"ThesaurusTerm":"Temporal variations","ThestID":8431,"Acronym":"ASFA","ThesTermPath":"Temporal variations"},{"ThesaurusTerm":"Estuaries","ThestID":2895,"Acronym":"ASFA","ThesTermPath":"Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Estuaries"},{"ThesaurusTerm":"Rivers","ThestID":7023,"Acronym":"ASFA","ThesTermPath":"Water bodies > Inland waters > Rivers"}],"thestermsASFA":[{"ThesaurusTerm":"Acclimatization"},{"ThesaurusTerm":"Adaptations"},{"ThesaurusTerm":"ANW, Canada, Quebec, St. Lawrence Estuary"},{"ThesaurusTerm":"Biomass"},{"ThesaurusTerm":"Chlorophylls"},{"ThesaurusTerm":"Estuaries"},{"ThesaurusTerm":"Exposure tolerance"},{"ThesaurusTerm":"Irradiance"},{"ThesaurusTerm":"Light effects"},{"ThesaurusTerm":"Nannoplankton"},{"ThesaurusTerm":"Phytoplankton"},{"ThesaurusTerm":"Rivers"},{"ThesaurusTerm":"Salinity data"},{"ThesaurusTerm":"Seston"},{"ThesaurusTerm":"Spatial variations"},{"ThesaurusTerm":"Temporal variations"},{"ThesaurusTerm":"Turbidity"},{"ThesaurusTerm":"Vertical profiles"},{"ThesaurusTerm":"Water temperature"}],"taxtermsASFA":null,"geotermsASFA":[{"GeoTerm":"St. Lawrence Estuary"}],"collections":null,"conf":null,"proj":null,"Physdatasets":null,"spcols":null,"doi":null,"publs":null,"serparttypes":null,"monauthors":null,"MParts":null,"SParts":null,"hLibs":null,"langs":[{"BEntID":94147,"AbstractFlag":-1,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"}],"urls":null,"thesterms":[{"ThesaurusTerm":"Acclimatization","ThestID":46,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Adaptations","ThestID":135,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"ANW, Canada, Quebec, St. Lawrence Estuary","ThestID":182338,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"Biomass","ThestID":999,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Chlorophylls","ThestID":1537,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Estuaries","ThestID":2895,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Exposure tolerance","ThestID":2998,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Irradiance","ThestID":4466,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Light effects","ThestID":4719,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Nannoplankton","ThestID":5412,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Phytoplankton","ThestID":6208,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Rivers","ThestID":7023,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Salinity data","ThestID":7095,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Seston","ThestID":7500,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Spatial variations","ThestID":7855,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Temporal variations","ThestID":8431,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Turbidity","ThestID":8796,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Vertical profiles","ThestID":8976,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Water temperature","ThestID":9146,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"}],"taxterms":null,"geoterms":[{"GeoTerm":"St. Lawrence Estuary","GeoObjectID":23554,"GeotID":622}],"othterms":null,"asfacodes":null,"asfa2codes":null,"thestermsFRIS":[{"ThesaurusTerm":"Acclimatization","DutchTerm":null,"ThestID":46,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Adaptations","DutchTerm":null,"ThestID":135,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"ANW, Canada, Quebec, St. Lawrence Estuary","DutchTerm":null,"ThestID":182338,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"Biomass","DutchTerm":"Biomassa","ThestID":999,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Chlorophylls","DutchTerm":"Chlorofyl","ThestID":1537,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Estuaries","DutchTerm":"Estuaria","ThestID":2895,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Exposure tolerance","DutchTerm":"Blootstellingstolerantie","ThestID":2998,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Irradiance","DutchTerm":"Straling","ThestID":4466,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Light effects","DutchTerm":"Lichteffecten","ThestID":4719,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Nannoplankton","DutchTerm":"Nanoplankton","ThestID":5412,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Phytoplankton","DutchTerm":"Fytoplankton","ThestID":6208,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Rivers","DutchTerm":"Rivieren","ThestID":7023,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Salinity data","DutchTerm":"Zoutgegevens","ThestID":7095,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Seston","DutchTerm":"Seston","ThestID":7500,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Spatial variations","DutchTerm":"Ruimtelijk variaties","ThestID":7855,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Temporal variations","DutchTerm":"Temporele variatie","ThestID":8431,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Turbidity","DutchTerm":"Troebelheid","ThestID":8796,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Vertical profiles","DutchTerm":"Verticale profielen","ThestID":8976,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Water temperature","DutchTerm":"Watertemperatuur","ThestID":9146,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"}],"taxtermsFRIS":null,"geotermsFRIS":[{"GeoTerm":"St. Lawrence Estuary","DutchTerm":null}],"othtermsFRIS":null,"resmessage":"","complete":1,"sessions":{"newSesName":"Milh, Dominique, D.","newSesDate":{"date":"2006-05-15 08:35:33.507000","timezone_type":3,"timezone":"Europe/Brussels"},"updSesName":"Milh, Dominique, D.","updSesDate":{"date":"2006-05-15 08:35:33.507000","timezone_type":3,"timezone":"Europe/Brussels"}}}