{"projectrec":{"ProID":1679,"StandardTitle":"Biogeochemical processes in estuarine systems","OrigTitle":"Biogeochemische processen in estuariene systemen","Acronym":null,"AbstractEnglish":"Problem definition: Most estuaries are heterotrophic, i.e. respiration dominates over production. Heterotrophic estuaries are characterised by bacterial production higher than primary production, high organic loading, high nutrient levels, high degree of stauration and effluxes of carbon dioxide, release of greenhouse gases and extensive denitrification. In heterotrophic systems organic carbon cycling controls nitrogen cycling rather than the opposite. Estuaries are very dynamic systems with high turn-over rates of carbon, nitrogen and other biogeochemical components and with distinct spatial gradients. Because of logistic and financial constraints, field measurement will alwys be limited in spatial and temporal coverage. In order to obtain information on a scale relevant for regional, or global, cycles, it is important te develop process-based integrative models that allow extrapolations to be made. The Westerschelde is a typical turbid, tidal estuary in which bacterial processing of imported organic matter dominates over primary production. The ecosystem functioning and carbon and nitrogen dynamics of the Westerschelde will be studied using a number of approaches: 1) the seasonal study of nutrients and other basic parameters; 2) detailed process measurements on key processes such as denitrification, nitrogen assimilation, etc.; 3) development of state-f-the-art coupled benthic-pelagic biogeochemical models Objectives: : * To quantify the importance of marches in estuarine carbon and nutrient cycles * To use stable isotopes at natural abundance and as deliberate tracers to trace carbon and nutrient flows * To improve coupled biogeochemical models for estuarine systems. Planning 2000: * Elaboration results from BIOGEST project (EU supported) * Elaboration results from OMES/SIGMA projects ( supported by Vlaamse Gemeenschap)","AbstractOtherLang":"Probleemdefinitie: De meeste estuaria zijn heterotrofisch, dit wil zeggen dat respiratie groter is dan productie. Heterotrofe estuaria zijn gekenmerkt door hogere bacteriële productie dan primaire productie, hoge organische lading, hoge nutrientgehaltes, een hoge graad van saturatie en uitstromingen van koolstofdioxide, vrijgave van broeikasgassen en extensieve denitrificatie. In heterotrofe systemen controleert de organische koolstofcyclus de stikstofcyclus eerder dan omgekeerd. Estuaria zijn zeer dynamische systemen met hoge turn-over graad van koolstof, stikstof en andere biogeochemische componenten en met verschillende ruimtelijke gradienten. Door logistieke en financiële beperkingen zullen veldcampagnes altijd gelimiteerd zijn ruimtelijke en temporele coverage. Om informatie te verzamelen op een schaal die relevant is voor regionale of globale cycli is het belangrijk om geïntegreerde modellen te ontwikkelen die toelaten om extapolaties te doen. \r\nDe Westerschelde is een typisch turbied getijde-estuarium waarin bacteriele processen van aangevoerde organische massa domineren over primaire productie. Het functioneren van het ecosysteem en het koolstof- en stikstofdynamisme van de Westerschelde zullen bestudeerd worden door het gebruik van een aantal aanpakken: 1) de seizoenale studie van nutrienten en andere algemene parameters; 2) gedetaileerde metingen van sleutelprocessen denitrificatie, stikstof assimilatie, etc.; 3) ontwikkeling van state-of-the-art gekoppelde bentisch-pelagisch biogeochemische modellen.\r\nObjectieven: Het kwantificeren van de belangrijkheid van schorren in estuariene koolstof en nutrient cycly. Het gebruik van stabiele isotopen op natuurlijke dichtheden en als doelbewuste tracers voor het opsporen van koolstof- en nutrienten stromen. Het verbeteren van gekoppelde biogeochemische modellen voor estuariene systemen.","DateLastModified":{"date":"2025-07-02 08:33:20.809226","timezone_type":1,"timezone":"+02:00"},"ParentProID":null,"BeginYear":2000,"EndYear":2004,"BMonth":null,"EMonth":null,"BeginMonth":null,"EndMonth":null,"OrigTitleLangCode":"nl","OrigTitleLangID":41,"OrigTitleLangNL":"Nederlands","OrigTitleLang":"Dutch","OtherAbstractLangCode":"nl","OtherAbstractLangID":41,"OtherAbstractLang":"Dutch","OtherAbstractLangNL":"Nederlands","Progress":"Completed","ProgressNL":"Afgelopen","PublicFlag":1,"CheckedFlag":1,"ND":"2005-10-04","UD":"2009-02-24","DMPFlag":0,"Budget":null,"BudgetCurrency":"EUR"},"parent":null,"persons":null,"projects":null,"events":null,"datasets":null,"institutes":[{"instituterec":{"Acronym":null,"ProPartID":6701,"PublicFlag":1,"OrigNameLangCode":"nl","OrigNameLangID":41,"FullOrigName":null,"Line1":"Korringaweg 7","Line2":"Postbus 140","Line3":"4400 AC  Yerseke","Line4":null,"InsID":60,"FullStandardName":"Koninklijk Nederlands Instituut voor Onderzoek der Zee; NIOZ Yerseke","Role":"Secretariat","RoleID":54,"EncAddress":"Korringaweg 7, Postbus 140, 4400 AC  Yerseke, Netherlands"},"parent":null,"institutes":null,"references":null,"conferences":null,"datasets":null,"persons":[{"Surname":"Middelburg","Firstname":"Jack","Initials":"J.B.M.","LeaderFlag":1,"PersID":3477,"Role":null,"RoleID":null,"PastInstitute":null,"BeginDay":null,"BeginMonth":null,"BeginYear":null,"EndDay":null,"EndMonth":null,"EndYear":null}],"pastpers":null,"subpers":null,"projects":null,"urls":null,"pictures":null,"published":null,"affrefs":null,"collections":null,"thesterms":null,"taxterms":null,"geoterms":null,"thestermsFRIS":null,"nXtins":null,"previns":null,"spcols":null,"resmessage":"no id specified","complete":0,"participantrec":null,"peerrevs":null,"urlmaps":null}],"refs":null,"urls":[{"URL":"www.onderzoekinformatie.nl/nl/oi/nod/onderzoek/OND1273714","externalID":null,"URLTypeCode":null,"URLType":null,"URLTypID":null}],"thesterms":[{"ThesaurusTerm":"ANE, Netherlands, Westerschelde","ThestID":182103,"ThesTypID":34,"ThesType":"ASFA Geoterms","OrigThesTerm":"ANE, Netherlands, Westerschelde","DutchTerm":null,"Code":null},{"ThesaurusTerm":"Biogeochemical cycle","ThestID":936,"ThesTypID":1,"ThesType":"ASFA Thesaurus List","OrigThesTerm":"Biogeochemical cycle","DutchTerm":"Biogeochemische cyclus","Code":"c_32983"},{"ThesaurusTerm":"Biogeochemistry","ThestID":937,"ThesTypID":1,"ThesType":"ASFA Thesaurus List","OrigThesTerm":"Biogeochemistry","DutchTerm":"Biogeochemie","Code":"c_fbe7799e"},{"ThesaurusTerm":"Nutrient cycles","ThestID":5625,"ThesTypID":1,"ThesType":"ASFA Thesaurus List","OrigThesTerm":"Nutrient cycles","DutchTerm":"Nutrientencyclus","Code":"c_12869"}],"taxterms":null,"geoterms":[{"GeoTerm":"Westerschelde","GeoObjectID":4752,"OrigGeoTerm":"Westerschelde","DutchTerm":"Westerschelde"}],"funderids":[{"FunderID":"OND1273714","ThestID":181476,"FunderType":"Other contract id"}],"othtermsFRIS":null,"pictures":[],"spcols":[{"SpColID":345,"SpName":"NIOO-CEME collection"},{"SpColID":27,"SpName":"ScheldeMonitor"}],"resmessage":"","complete":1}