{"refrec":{"BRefID":254738,"RR":"<b>Harding Jr., L.W.</b> (2016). Variable climatic conditions dominate recent phytoplankton dynamics in Chesapeake Bay. <i>NPG Scientific Reports 6(23773)</i>: 16 pp. <a href=\"http://dx.doi.org/10.1038/srep23773\" target=\"_blank\">http://dx.doi.org/10.1038/srep23773</a>","BEntID":246743,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>NPG Scientific Reports 6(23773)</i>: 16 pp. <a href=\"http://dx.doi.org/10.1038/srep23773\" target=\"_blank\">http://dx.doi.org/10.1038/srep23773</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":1,"TerrestrialFlag":0,"Authorstring":"Harding Jr., L.W.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Harding Jr., L.W.","Englishabstract":"Variable climatic conditions strongly influence phytoplankton dynamics in estuaries globally. Our study area is Chesapeake Bay, a highly productive ecosystem providing natural resources, transportation, and recreation for nearly 16 million people inhabiting a 165,000-km(2) watershed. Since World War II, nutrient over-enrichment has led to multiple ecosystem impairments caused by increased phytoplankton biomass as chlorophyll-a (chl-a). Doubled nitrogen (N) loadings from 1945-1980 led to increased chl-a, reduced water clarity, and low dissolved oxygen (DO), while decreased N loadings from 1981-2012 suggest modest improvement. The recent 30+ years are characterized by high inter-annual variability of chl-a, coinciding with irregular dry and wet periods, complicating the detection of long-term trends. Here, we synthesize time-series data for historical and recent N loadings (TN, NO2 + NO3), chl-a, floral composition, and net primary productivity (NPP) to distinguish secular changes caused by nutrient over-enrichment from spatio-temporal variability imposed by climatic conditions. Wet years showed higher chl-a, higher diatom abundance, and increased NPP, while dry years showed lower chl-a, lower diatom abundance, and decreased NPP. Our findings support a conceptual model wherein variable climatic conditions dominate recent phytoplankton dynamics against a backdrop of nutrient over-enrichment, emphasizing the need to separate these effects to gauge progress toward improving water quality in estuaries.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Variable climatic conditions dominate recent phytoplankton dynamics in Chesapeake Bay","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-13 01:31:25.010294","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2016,"MonPub":null,"DateUpdate":"2018-02-13","DateCreate":"2016-04-05","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000373048400001","VABBcode":null,"OpenAcc":1,"DOI":"10.1038/srep23773"},"refs":null,"anarec":{"AnaID":254738,"PubliDate":2016,"Pagination":"16 pp","XtraPublOfAnaID":null,"ISBN":null,"Volume":"6","Issue":"23773","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":208093,"SerRR":"Scientific Reports (Nature Publishing Group). 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ISSN 2045-2322; e-ISSN 2045-2322","StandardTitleSer":"Scientific Reports (Nature Publishing Group)","ISSN":"2045-2322","AbbrevSer":"NPG Scientific Reports","StandardTitleMon":null,"StartPage":null,"Pages":null,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Harding Jr.","Firstname":"Lawrence","Initials":"L.W.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":246743,"AutID":54627,"OrderNr":1,"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":[{"BInstID":288453,"LibID":36,"BRefID":254738,"EmbargoDate":null,"FullEmbargoDate":null,"PhysMedID":16,"hasOCRd":1,"ShelfLocCode":"288453","RFID":null,"PaidValue":null,"Medium":"Server","Description":"VLIZ Open Access","Acronym":"VLIZ","Library":"Vlaams Instituut voor de Zee","DutchTerm":"Open access","URL":null,"ClassifID":53,"Classification":"Open access","ReqLink":null,"ClassifTypID":1,"URLLocation":"https://www.vliz.be/imisdocs/publications/","SubDir":null,"InternalReq":0,"LoggedInReq":0,"Disclaimer":null,"DutchDisclaimer":null,"FileFormat":".pdf","FileDescr":"pdf","InsPub":1,"InsID":36,"FileFormID":6,"LendableFlag":1,"PublicFlag":1,"orderLib":"A","Notes":null,"AccConID":null,"AccessConstraint":null,"LicURL":null}],"litstyles":null,"thespers":null,"arch2discl":null,"SERpubls":[{"PublName":"Nature Publishing Group","City":"London"}],"MONpubls":null,"pictures":[],"thestermsPath":[{"ThesaurusTerm":"ANW, USA, Chesapeake Bay","ThestID":182368,"Acronym":"ASFA_GEOT","ThesTermPath":"ANW, USA, Chesapeake Bay"},{"ThesaurusTerm":"Phytoplankton","ThestID":6208,"Acronym":"ASFA","ThesTermPath":"Aquatic communities > Plankton > Phytoplankton"}],"thestermsASFA":[{"ThesaurusTerm":"ANW, USA, Chesapeake Bay"},{"ThesaurusTerm":"Phytoplankton"}],"taxtermsASFA":null,"geotermsASFA":[{"GeoTerm":"Chesapeake Bay"}],"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":246743,"AbstractFlag":0,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"}],"urls":[{"URL":"http://dx.doi.org/10.1038/srep23773","externalID":"10.1038/srep23773","URLTypeCode":"DOI","URLID":44074,"URLTypID":13,"URLType":"DOI","URLPrefix":"http://dx.doi.org/"}],"thesterms":[{"ThesaurusTerm":"ANW, USA, Chesapeake Bay","ThestID":182368,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"Phytoplankton","ThestID":6208,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"}],"taxterms":null,"geoterms":[{"GeoTerm":"Chesapeake Bay","GeoObjectID":18966,"GeotID":651}],"othterms":null,"asfacodes":null,"asfa2codes":null,"thestermsFRIS":[{"ThesaurusTerm":"ANW, USA, Chesapeake Bay","DutchTerm":null,"ThestID":182368,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"Phytoplankton","DutchTerm":"Fytoplankton","ThestID":6208,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"}],"taxtermsFRIS":null,"geotermsFRIS":[{"GeoTerm":"Chesapeake Bay","DutchTerm":null}],"othtermsFRIS":null,"resmessage":"","complete":1,"sessions":{"newSesName":"Chisala, Chilekwa, C.","newSesDate":{"date":"2016-04-05 09:10:26.237000","timezone_type":3,"timezone":"Europe/Brussels"},"updSesName":"Lyssens, Liesbeth, L.","updSesDate":{"date":"2018-02-13 19:34:46.407000","timezone_type":3,"timezone":"Europe/Brussels"}}}