Description: Das Projekt "Interaktive Regulierung der Phytoplanktonabfolge durch physischen Druck und interne Phosphorbelastung: eine Vergleichsstudie in eutrophierten Suesswasserseen" wird vom Umweltbundesamt gefördert und von Universität Regensburg, Institut für Experimentelle und Angewandte Physik durchgeführt. Objective/Problems to be solved: Deterioration of water quality of freshwater lakes, as a consequence of man-made perturbations such as water level regulations, pollution and food web manipulations is a commonly observed phenomenon of our times. In the extreme case of long lasting elevated pollution loads and the affluence of bio-available phosphorus (BAP) the lake ecosystem responded with increasing algal biomass and a species shift to nitrogen fixing cyanobacteria. After becoming aware of phosphorus (P) as the driving force of eutrophication the reduction of external P loading became the primary management target. However, in many cases even a drastic reduction of the external P-loading did not succeed in improving water quality since P-recycling from bottom sediments sufficed to provide the amount of BAP necessary to support algae blooms. The question arises in how far this development can be reversed and algae diversity restored. Considering the variety of available remedial measures, an experimental procedure to predict water quality changes is needed to arrive at the decision upon the optimum management strategy. The proposed study complies with this requirement through an experimental approach based upon the control of environmental parameters such as nutrient loading or resuspension in large enclosures, while monitoring phytoplankton succession. Our proposal enforces community water policy aimed to achieve sustainability of aquatic systems by responding to the following Water Framework Directives: eutrophication control (91/271/EEC) and safeguarding human health by establishing strict standards for the quality of water intended for human consumption (80/778/EEC). Scientific objectives and approach: Using a novel monitoring tool for phytoplankton diversity and biomass the present study is aimed at the interactive regulation of phytoplankton succession by physical forcing and internal P loading in freshwater lakes. Our workplan is designed to arrive at these goals by meeting the following objectives: - Introduction of delayed fluorescence spectrometry (DF) as a tool for continuous on-line monitoring of phytoplankton density composition and activity in aquatic systems. - Quantification of internal P loading due to sedimentary P release, by following P accumulation into the water column of large limnocorrals. - Studying the dynamics between the dissolved phase and the particulate phase of P within the enclosures with special emphasis on resuspension and sedimentation processes. - Investigation of the phytoplankton response to different internal P loading scenarios as simulated in the limnocorrals. Prime Contractor: Israel Oceanographic and Limnological Research Ltd., Kinneret Limnological Laboratory; Haifa/Israel.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Phosphorrückgewinnung ? Algenblüte ? Fluoreszenz ? Benzo(a)pyren ? Eutrophierung ? Nährstoffgehalt ? Phosphorbelastung ? Stausee ? Seen ? Cyanobakterien ? Nährstoff ? Phosphor ? Phytoplankton ? Schadstoffbelastung ? Seenverunreinigung ? Spektralphotometrie ? Stickstoff ? Israel ? EU-Kommunalabwasserrichtlinie ? Spektralanalyse ? Szenario ? Gewässerüberwachung ? Süßwasserverunreinigung ? EU-Trinkwasserrichtlinie ? Limnisches Ökosystem ? Algenbiomasse ? Messverfahren ? Monitoring ? Bestimmungsmethode ? Studie ? Vergleichsanalyse ? Wasserqualität ? Sediment ? Algen ? Sanierungsmaßnahme ? Wasser ? Wasserpolitik ? Menschliche Gesundheit ? Schutzmaßnahme ? Umweltschutz ? Ökosystem ? Biomasse ? Physikalischer Vorgang ? Wasserstand ? Wirtschaftliche Aspekte ? Schadstoffminderung ? Kenngröße ? Sedimentation ? Soziale Aspekte ? See [Binnengewässer] ? Diversität ?
Region: Bayern
Bounding box: 12.53381° .. 12.53381° x 47.795° .. 47.795°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2000-01-02 - 2004-01-31
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