{"refrec":{"BRefID":218207,"RR":"Tyler, A.C.; McGlathery, K.J. (2006). Uptake and release of nitrogen by the macroalgae Gracilaria vermiculophylla (Rhodophyta). J. Phycol. 42(3): 515-525. http://dx.doi.org/10.1111/j.1529-8817.2006.00224.x","BEntID":209950,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". J. Phycol. 42(3): 515-525. http://dx.doi.org/10.1111/j.1529-8817.2006.00224.x","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Tyler, A.C.; McGlathery, K.J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Tyler, A.C.; McGlathery, K.J.","Englishabstract":"Macroalgae, often the dominant primary producers in shallow estuaries, can be important regulators of nitrogen (N) cycling. Like phytoplankton, actively growing macroalgae release N to the water column; yet little is known about the quantity or nature of this release. Using 15N labeling in laboratory and field experiments, we estimated the quantity of N released relative to assimilation and gross uptake by Gracilaria vermiculophylla (Ohmi) Papenfuss (Rhodophyta, Gracilariales), a non-native macroalgae. Field experiments were carried out in Hog Island Bay, a shallow back-barrier lagoon on the Virginia coast where G. vermiculophylla makes up 85%–90% of the biomass. There was good agreement between laboratory and field measurements of N uptake and release. Daily N assimilation in field experiments (32.3±7.2 µmol N·g dw-1·d-1) was correlated with seasonal and local N availability. The average rate of N release across all sites and dates (65.8±11.6 µmol N·g dw-1·d-1) was 67% of gross daily uptake, and also varied among sites and seasons (range=33%–99%). Release was highest when growth rates and nutrient availability were low, possibly due to senescence during these periods. During summer biomass peaks, estimated N release from macroalgal mats was as high as 17 mmol N·m-2·d-1. Our results suggest that most estimates of macroalgal N uptake severely underestimate gross N uptake and that N is taken up, transformed, and released to the water column on short time scales (minutes–hours).","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Uptake and release of nitrogen by the macroalgae Gracilaria vermiculophylla (Rhodophyta)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-06 01:32:44.309868","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"; ; dissolved organic compounds; invasive species; lagoons; macroalgae; nitrogen; organic matter; Virginia Coast","OtherDescriptors":null,"Notes":null,"AnaPub":2006,"MonPub":null,"DateUpdate":"2012-09-13","DateCreate":"2012-09-13","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000237812400001","VABBcode":null,"OpenAcc":0,"DOI":"10.1111/j.1529-8817.2006.00224.x"},"refs":null,"anarec":{"AnaID":218207,"PubliDate":2006,"Pagination":"515-525","XtraPublOfAnaID":null,"ISBN":null,"Volume":"42","Issue":"3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43251,"SerRR":"Journal of Phycology. Blackwell Science: New York. ISSN 0022-3646; e-ISSN 1529-8817","StandardTitleSer":"Journal of Phycology","ISSN":"0022-3646","AbbrevSer":"J. Phycol.","StandardTitleMon":null,"StartPage":515,"Pages":11,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Tyler","Firstname":"Anna","Initials":"A.C.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":209950,"AutID":151589,"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":"McGlathery","Firstname":"Karen","Initials":"K.J.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":209950,"AutID":51520,"OrderNr":2,"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":238372,"LibID":36,"BRefID":218207,"EmbargoDate":null,"FullEmbargoDate":null,"PhysMedID":16,"hasOCRd":1,"ShelfLocCode":"238372","RFID":null,"PaidValue":null,"Medium":"Server","Description":"Interne VLIZ documenten","Acronym":"VLIZ","Library":"Vlaams Instituut voor de Zee","DutchTerm":"Non-open access","URL":null,"ClassifID":228,"Classification":"Non-open access","ReqLink":1,"ClassifTypID":3,"URLLocation":"https://www.vliz.be/imisdocs/publications/","SubDir":1,"InternalReq":1,"LoggedInReq":1,"Disclaimer":"Disclaimer_VLIZ_Intern","DutchDisclaimer":"
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