Objetivo The general objective is to develop a predictive mathematical model of trace element (Fe/Mn) transfer and accumulation in the Phaeocystis-dominated ecosystem of the continental coastal zone of the North Sea focussing on the role of Phaeocystis colonies and their derived aggregates as vector for metal transport.The biogeochemical model will be developed on the basis of the existing predictive mathematical model MIRO, established in the scope of the EC Phaeocystis project (1988-1993) and describing the response of the Phaeocystis-dominated ecosystem of the continental coastal zone of the North Sea to the cumulative nutrient discharges by the major NW European rivers.The project methodology will combine field observations, field and laboratory process-oriented studies and modelling development in an attempt to build up a biogeochemical model representing, as accurately as possible, the kinetics and control of the physiological and geochemical processes involved in the functioning of the Phaeocystis-dominated North Sea ecosystem and trace element transfer and accumulation. Modelling work will include the improvement of the formulation of the biological module of the MIRO model through the addition of aggregates as explicite state variable; and its coupling with a chemical module of precipitation and dissolving of Fe/Mn hydroxides. Experimentally it implies :1. Field study, during a Phaeocystis bloom in the continental coastal zone of the North Sea, of (i) particle aggregation/disaggregation and sedimentation; and (ii) Fe/Mn dissolved and particulate concentrations with special attention to Fe/Mn oxyhydroxide deposits in Phaeocystis colonies and bioaccumulation by phytoplankton cells.2. Field and laboratory study of (i) the physiological and chemical processes controlling Fe/Mn sequestration by Phaeocystis colonies and their redissolving; and (ii) the physical and biological mechanisms governing Phaeocystis-derived aggregation/disaggregation.Application of the biogeochemical model in the coastal zone of the North Sea will allow to evaluate the role of Phaeocystis colonies and their derived aggregates in the biogeochemical cycle of trace-metals. Ámbito científico natural sciencesearth and related environmental sciencesgeologysedimentologynatural sciencesbiological sciencesecologyecosystemsnatural sciencesearth and related environmental sciencesgeochemistrybiogeochemistrynatural sciencesmathematicsapplied mathematicsmathematical model Programa(s) FP3-ENV 1C - Specific research and technological development programme (EEC) in the field of the environment, 1990-1994 Tema(s) 0106 - Biogeochemical cycles and ecosystem dynamics Convocatoria de propuestas Data not available Régimen de financiación CSC - Cost-sharing contracts Coordinador UNIVERSITE LIBRE DE BRUXELLES Aportación de la UE Sin datos Dirección 221,Boulevard du Triomphe 221 1050 BRUXELLES Bélgica Ver en el mapa Coste total Sin datos Participantes (2) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo ALFRED WEGENER INSTITUTE FOR POLAR AND MARINE RESEARCH Alemania Aportación de la UE Sin datos Dirección Columbusstrasse 27568 BREMERHAVEN Ver en el mapa Enlaces Sitio web Opens in new window Coste total Sin datos Netherlands Institute for Sea Research Países Bajos Aportación de la UE Sin datos Dirección 1790 AB Texel, Den Burg Ver en el mapa Coste total Sin datos
