Description: Das Projekt "DYSPART: Dynamik der Resuspension von Sedimentpartikeln und deren Transport in eutrophierten Seen - Teil 1: biogeochemikalischer Zyklus von Kohlenstoff und Stickstoff im Luganer See" wird vom Umweltbundesamt gefördert und von Eidgenössische Technische Hochschule Zürich, Geologisches Institut durchgeführt. The main goal of the project is to understand and calibrate the factors controlling the nitrogen and carbon isotopic composition of lacustrine organic matter by measuring the C and N isotope composition of particulate organic matter and dissolved inorganic Nitrogen and Carbon over two yearly cycles. We anticipate that these results will allow for a improved understanding of the biogeochemical cycles in an eutrophic lake and our capability to reconstruct paleoenvironmental changes from carbon and nitrogen isotope composition of sedimentary organic matter. Lake Lugano offers an unique situation to study these processes because of the large amount and long time-series of limnological data available including: water column chemistry, primary productivity, phyto-and zooplankton populations sediment fluxes and sediment trap samples. The second main goal of this project will be to determine the incidence of lateral sediment transport processes in Lake Lugano. Resuspension and transport of sediment particles will be quantified measuring the fluxes of organic matter with sediment traps and allochtonous inputs from the main tributaries, coupled with the determination of isotopic ratios of carbon and nitrogen in the sedimenting organic matter. These isotopic measurements will verify the possibility of using C-isotopes to determine the origin of the excess C and N accumulation in hypolimnetic sediment traps. In addition, analysis of already available daily records of turbidity collected during 1994-1995 will be used to further constrain these processes.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Gelöster anorganischer Stickstoff ? Eutrophierung ? Paläoökologie ? Seen ? Lugano ? Zürich ? Biochemie ? Flusssediment ? Kohlenstoff ? Phytoplankton ? Seensediment ? Stickstoff ? Zooplankton ? Schwefel ? Umweltcontrolling ? Main ? Binnengewässer ? Chemie ? Chemische Zusammensetzung ? Gewässersediment ? Isotopentechnik ? Messprogramm ? Sedimentanalyse ? Organisches Material ? Suspension ? Absetzbare Stoffe ? Geologischer Prozess ? Gelöster organischer Kohlenstoff ? Quantitative Analyse ? Studie ? Kohlenstoffkreislauf ? Vertikalprofil ? Wasserprobe ? Geologie ? Sediment ? Pflanze ? Daten ? Isotop ? Stickstoffkreislauf ? Stoffkreislauf ? Stofftransport ? Partikel ? Population ? Produktivität ? Sedimentation ? Sedimenttransport ? Isotopenverhältnis ? See [Binnengewässer] ? Eutrophie ? Luganosee ?
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1998-04-01 - 2002-03-31
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