{"projectrec":{"ProID":2079,"StandardTitle":"Macrophytes and nutrient dynamics: process and field studies in the upper reaches of river bassins","OrigTitle":"Macrophyten en nutriënt dynamiek: proces en veldstudies in de bovenlopen van rivieren","Acronym":"MANUDYN III","AbstractEnglish":"<b>Context</b>\r\n\r\nWater quality and –quantity modelling is an important tool for integrated water management. However there is a lack of knowledge considering the role of macrophytes in these models. Models focusing on the role of macrophytes are really restricted to the plant itself. The link of these models and the more general water quality and – quantity models has to be done. The development of such models must thus rely on experiments designed to describe in a quantitative way the growth and decay of macrophytes in response to physical, biological and chemical external factors. Important factors are species composition, patch densities, water flow velocities, nutrient concentrations in the water and sediments, temperature and light. During this project we want to get insight into the above-mentioned factors.\r\n\r\n\r\n<b>Project Description</b>\r\n\r\n<i>Objectives</i>\r\n\r\nThe general objective of this project is to develop a numerical tool allowing the quantitative description of the growth and decay of macrophytes, and of their interactions with nutrients from the water column and the sediments. For this purpose we will study, in detail, the growth, decay, and nutrient uptake, release and allocation processes of macrophytes in response to their various physical, chemical and biological controlling factors. These include light intensity, temperature, water quality, sediment quality, stream velocities and macrophyte or macro-algae species composition. Experiments will be performed at various spatial and temporal scales in order to develop integrated models describing the kinetics of growth and decomposition of river macrophytes. Once integrated into stream ecosystem models, this might serve as an efficient tool to explore various scenarios of macrophyte biomass controls. For example the effects of biomass removal (mowing) on in-stream nutrient retention can be evaluated, with the possible consequences for the downstream (estuary, coastal zone) ecosystems.\r\n\r\n<i>Methodology</i>\r\n\r\nAs suggested from the result of the first MANUDYN project, the study of macrophyte growth and degradation processes, and of nutrient, light and temperature effects is a difficult task to be performed directly in the field, and this because of the heterogenic and complex interactions between streaming water, sediments and macrophyte patches. Therefore, in order to fulfil our objectives, experiments will be conducted at different scales taking into account an increasing complexity: from the simplest system taking into accounts a single macrophyte specimen to the most complex system considering several macrophyte patches within rivers. In parallel with the experiments, modelling will follow each of the scale steps.\r\n\r\n\r\n<b>Interaction between the various partners</b>\r\n\r\nThe project is organized into four work packages; the first three work packages consist of experiments at different scales. Considering the division of the project, the expertise of the four partners is integrated in all these three work packages. \r\nEach task or subtask will be headed by one of the partners who will work in close collaboration with the coordinator to organize the preparation of reports. \r\nThe modelling aspect will be executed by the UA and Ulg who will work in close collaboration. Both partners have experience with modelling work. Meetings will take place at six monthly intervals to discuss their results whilst, at the same time, the future in terms of the overall project objectives will be considered.\r\nThe coordinator will supervise the quality of all performed actions: sampling must be carried out by people with the necessary experience and skills. Analyses should be performed according to the appropriate accreditations or standards. All steps in data or tool generation will be subject to stringent quality control and will be reported in detail. (e.g. nutrient-analysis will be performed according the accreditation standard ISO/IEC 17025)\r\n\r\n\r\n<b>Expected results and/or products</b>\r\n\r\nThe expected results of small and mid-scale experiments will provide an improved insight in the detailed processes of nutrient uptake in macrophytes where a high number of controlling factors such as light intensity, temperature, nutrient concentrations in the surface water will be tested. Both the increased understanding and the associated modelling will be essential for incorporating the role of macrophyte in the scope of integrated water management.\r\nThe better understanding of the detailed uptake and growth processes concerning freshwater macrophytes in the upper catchments and of the link between the catchment and the estuary can greatly improve the water quality management at the basin scale. It will be possible to evaluate the impact of different strategies on macrophyte populations and on the water quality at the interface between the headwaters and the estuarine system.","AbstractOtherLang":"<b>Context</b>\r\n\r\nWaterkwaliteits- en kwantiteits modellering is een belangrijk instrument bij integraal waterbeheer. Binnen deze modellering is er een duidelijk gebrek aan implementatie van de rol van de macrofyten op zowel kwalitatief als kwantitatief niveau. De modellen voor macrofyten beperken zich voornamelijk tot op het niveau van de macrofyten zelf. De koppeling van deze modellen met de algemene waterkwaliteits- en kwantiteitsmodellen moet gebaseerd zijn op experimenten die kwantitatief beschrijven hoe de groei en afbraak van macrofyten is gekoppeld aan fysische, chemische en biologische factoren. Met dit project zal er inzicht verworven worden in factoren als soortensamenstelling en densiteit, stroomsnelheid en nutriënten verschillen in de waterkolom en bodem. \r\n\r\n\r\n<b>Projectbeschrijving</b>\r\n\r\n<i>Doelstellingen</i>\r\n\r\nDe algemene doelstelling van dit project is om een numeriek model te ontwikkelen dat de groei en afbraak van macrofyten beschrijft maar tevens rekening houdt met de interacties tussen nutriënten aanwezig in de waterkolom en de waterbodem. Om hier een beter zicht op te krijgen zal de groei, afbraak en nutriëntenopname en afgave van macrofyten in detail worden bestudeerd in functie van verscheidene fysische, chemische en biologische factoren waaronder lichtintensiteit, temperatuur, water- en sedimentkwaliteit, stroomsnelheid en macrofyten/algen samenstelling. De experimenten zullen op verschillende ruimtelijke en tijdelijke schalen uitgevoerd worden om input te genereren voor de ontwikkeling van modellen welke de groei en afbraak kinetiek van macrofyten integreert. Zodra deze geïntegreerd zijn kunnen er scenario’s worden opgesteld in functie van macrofyten biomassa controle. Het effect van macrofyten verwijdering op de nutriëntengehaltes van een waterloop kan op deze manier geëvalueerd worden met inbegrip van de gevolgen op stroomafwaartse systemen (estuaria).\r\n\r\n<i>Methodologie</i>\r\n\r\nUit het voorgaande manudyn project is gebleken dat de groei en afbraakprocessen en de verschillende chemische, fysische en biologische processen moeilijk in-situ in te schatten zijn omwille van de heterogeniteit en complexe interacties tussen stroming, sedimenten en macrofyten patches. Om deze interactie beter te begrijpen worden er experimenten uitgevoerd op verschillende schalen en in stijgende complexiteit. Er zal vertrokken worden vanuit een individuele plant en zo verder gegaan worden naar experimenten met verscheidene macrofyten organisaties in een rivier. Parallel met deze experimenten zal de modellering telkens opgeschaald worden.\r\n\r\n<b>Interactie tussen de verschillende partners</b>\r\n\r\nHet project is georganiseerd in vier werkpakketten waarvan de eerste drie vooral op verschillende schalen uitgevoerd worden. De opzet van het project vereist dat de expertise van de verschillende partners zal ingezet worden in deze drie pakketten. Elke opdracht zal gesuperviseerd worden door één van de partners in nauwe samenwerking met de coördinator van het project. Het vierde werkpakket (modellering) zal uitgevoerd worden door een samenwerking tussen UA en Ulg. Beide partners hebben voldoende ervaring met het modelleren en zullen hun resultaten gedurende 6 maandelijkse vergaderingen op elkaar afstemmen.\r\nDe coördinator ziet toe op de kwaliteit van het project door de juist personen in te schakelen met de nodige ervaring en kennis. Analyses zullen uitgevoerd worden volgens de algemeen geldende regels.\r\n\r\n<b>Verwachte resultaten en/ of producten</b>\r\n\r\nDe verwachte resultaten van de schaalexperimenten zullen diepgaander inzicht verschaffen in de nutriënten uitwisseling van macrofyten waar factoren zoals lichtinterceptie, temperatuur, ... een belangrijke rol in hebben. Samen met de modellering moet dit leiden tot de incorporatie van macrofyten in een integraal waterbeheer. Door het gedetailleerd begrijpen van de nutriënten opname zal het eveneens mogelijk zijn om het beheer van de waterkwaliteit op bekkenschaal te verbeteren. Tevens is het mogelijk om een inschatting te maken van de gevolgen van verschillende maaibeheren op de nutriëntencyclus van en geheel bekken en meer bepaald naar de stroomafwaartse gevolgen.","DateLastModified":{"date":"2024-05-06 10:25:46.257000","timezone_type":1,"timezone":"+00:00"},"ParentProID":2063,"BeginYear":2006,"EndYear":2009,"BMonth":12,"EMonth":1,"BeginMonth":"December","EndMonth":"January","OrigTitleLangCode":"nl","OrigTitleLangID":41,"OrigTitleLangNL":"Nederlands","OrigTitleLang":"Dutch","OtherAbstractLangCode":"nl","OtherAbstractLangID":41,"OtherAbstractLang":"Dutch","OtherAbstractLangNL":"Nederlands","Progress":"Completed","ProgressNL":"Afgelopen","PublicFlag":1,"CheckedFlag":0,"ND":"2007-06-13","UD":"2009-02-26","DMPFlag":0,"Budget":null,"BudgetCurrency":"EUR"},"parent":{"ProID":2063,"Acronym":"SSD","StandardTitle":"Science for a Sustainable Development"},"persons":null,"projects":null,"events":null,"datasets":null,"institutes":[{"instituterec":{"Acronym":"ECOBE","ProPartID":8223,"PublicFlag":1,"OrigNameLangCode":"en","OrigNameLangID":15,"FullOrigName":"University of Antwerp; 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