Objectif To investigate the effect of continued eutrophication on the ecosystem stability of reed stands under different water table regimes and temperature conditions.The project will examine the effects of interactions between eutrophication, water table management and temperature on ecophysiological processes in reed plants and biogeochemical processes in the rhizosphere of reed. Changes in these processes are supposed to be involved in the die-back of reed stands. Variability within and between reed populations will be studied to prove (or disprove) that populations with limited genetic variability will be more susceptible to environmental stress than populations which are highly variable, or which are already adapted to high nutrient loads.The following tasks will be addressed:A) Determination of growth and productivity of reed populations at contrasting European localities.B) Field investigation of carbon and nutrient (especially nitrogen) cycles within reed stands in relation to the trophy status and the water table management of the sites.C) Determination of the effects of eutrophication, water table fluctuations and oxygen demand in the sediment on oxygen transport within the reed plants, architectural and anatomical structures related to O2 transport, and viability and growth of rhizomes and roots.D) Examination of the impacts of nutrient enrichment, temperature, and water table fluctuations on biogeochemical fluxes of C and N compounds, and on the characteristics of dominant nitrate-reducing bacteria.E) Determination of the genetic variability within and between European reed populations in relation to the trophic status of the site, hydrological situation, and the performance of the reed to progress or to be subject to die-back.The expected results of these investigations are intended to provide the scientific basis for the conservation and/or a more rational management of this important component of wetlands. Champ scientifique sciences naturellessciences biologiquesmicrobiologiebactériologiesciences socialeséconomie et affaireséconomieéconomie de la productionproductivitésciences naturellessciences biologiquesécologieécosystèmesciences naturellessciences de la Terre et sciences connexes de l'environnementgéochimiebiogéochimie Programme(s) FP3-ENV 1C - Specific research and technological development programme (EEC) in the field of the environment, 1990-1994 Thème(s) 0106 - Biogeochemical cycles and ecosystem dynamics Appel à propositions Data not available Régime de financement CSC - Cost-sharing contracts Coordinateur ROYAL NETHERLANDS ACADEMY OF ARTS AND SCIENCE Adresse 22,boterhoeksestraat 48 6666 ZG Heteren Pays-Bas Voir sur la carte Contribution de l’UE Aucune donnée Participants (6) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire Humboldt-Universität zu Berlin Allemagne Contribution de l’UE € 0,00 Adresse Luisenstraße 53 10117 Berlin Voir sur la carte Autres sources de financement Aucune donnée Institute of Botany - Academy of Sciences of the Czech Republic Tchéquie Contribution de l’UE € 0,00 Adresse 145,dukelská 379 01 Trebon Voir sur la carte Autres sources de financement Aucune donnée Ungarische Akademie Wissenschaft Hongrie Contribution de l’UE € 0,00 Adresse 2-4,alkotmány út 2163 Vácrátót Voir sur la carte Autres sources de financement Aucune donnée Universidade de Evora Portugal Contribution de l’UE € 0,00 Adresse 1,largo dos colegiais 7001 Evora Voir sur la carte Autres sources de financement Aucune donnée University of Hull Royaume-Uni Contribution de l’UE € 0,00 Adresse Cottingham road HU6 7RX Hull Voir sur la carte Autres sources de financement Aucune donnée Århus Universitet Danemark Contribution de l’UE € 0,00 Adresse 68,nordlandsvej 8240 Risskov Voir sur la carte Autres sources de financement Aucune donnée
