Annual Meeting 2005 Jena October 10-12, 2005 Session 1: Stabile Isotope in Medizin, Sport und Lebensmittelkontrolle U. Flenker, C. von Kuk, V. Gougoulidis, F.Hülsemann, W. Schänzer: Influence of dietary changes on the dynamics of 13C/12C in selected urinary steroids K. D. Wutzke, I. Oetjens: 13C- and 15N-incorporation of doubly stable isotope labelled Lactobacillus johnsonii in humans J. Jung, U. Hener, A. Münch, A. Mosandl: Authenticity Assessment of Glycerol in Wine H.-L. Schmidt und A. Rossmann, H.-P. Sieper und H.-J. Kupka: Ein Meßsystem zur parallelen Isotopenverhältnis- und Elementaranalyse von vier Elementen in Lebensmitteln und anderem biologischem Material Session 2: Methoden, Entwicklungen und Referenzmaterialien Simon Davis: Dual inlet precision 13C analysis with multi-aliquot CF analysis A. Hilkert, D. Juchelka, M. Krummen: New Applications by Isotope Ratio Monitoring LC/MS E. Hettmann, F. Volders, and G. Gleixner: Compound specific Carbon isotopic ratios of metabolites determined by LC/MS-IRMS M.Boner, K. Hecker, H. Förstel: Inertes Material zum Einsatz in der Hochtemperaturpyrolyse W.A. Brand, M. Patecki, P. Ghosh and M. Rothe: J-RAS: A high precision reference for the isotopic composition of CO2 in air Session 3: Stabile Isotope in Pflanzen Frank Keppler: Carbon isotope anomaly in the major plant C1 pool and its biogeochemical implications (For this talk Frank Keppler received the 'Best Presentation Award' of the GASIR 2005 meeting) J. Seyfferth, A. Soe, M. Kunert, S. Bartram, W. Boland: Biosynthese von Blüten- und Blätterduftstoffen - verfolgt anhand stabiler Isotopen A.R.B. Soe, A. Burse, S. Bartram, W. Boland: De novo biosyntheses versus sequestration of defense compounds in leaf beetles - a mechanistic approach by stable isotopes and molecular biological techniques G.L.B. Wiesenberg, J. Schwarzbauer, and L. Schwark: Plant-internal variation of lipid composition and compound-specific isotopes of various crops Session 4: Ökosysteme I: Funktion und Schadstoffe J. Gaye-Siessegger, U. Focken, H. Abel and K. Becker: Effect of dietary protein/energy ratio on trophic shift of C and N isotopes and on the activity of enzymes involved in the amino acid metabolism of Nile tilapia, Oreochromis niloticus (L.) C. Pázmándi and M. Traugott: Calibration of isotopic turnover rates in wireworms, common agricultural pests Gerhard Gebauer: Mundraub im Wurzelraum; Isotopenhäufigkeits-analysen und molekularbiologische Daten liefern neue Einblicke in die komplexe Ernährungsweise der Waldbodenvegetation S.P. Sah, N. Lamersdorf and R. Brumme: Natural abundance of 15N in different compartments of a spruce forest ecosystem under acid rain and manipulated clean rain field conditions (cancelled) M. Voß, B. Deutsch, R. Elmgren, C. Humborg, P. Kuuppo, M. Pastuszak, C. Rolff, and U. Schulte: River biogeochemistry and source identification of nitrate by means of isotopic tracers in the Baltic Sea catchments Böttcher M.E., Brumsack H.-J., Hetzel A. & Schipper A.: Isotope biogeochemistry of diagenesis caused by a black shale-fueled marine biosphere (ODP Leg 207) C. F. Stange und N. Pekkarinen: Doppel Isotopen-Tracer Studie zur Validierung der Barometrischen Prozessseparation (BaPS) Y. Oelmann, W. Wilcke und R. Bol: Quellencharakterisierung mit Hilfe von 15N und 18O Isotopen im Nitrat unter leguminosenhaltigem Grünland N. Borges, M. Rode, J. Spindler, T. Neef, R. Meissner, G. Strauch: Identification of main nitrate sources in a lowland agricultural drainage system using stable isotopes analysis N. Stelzer, S. Weber, I. Nijenhuis, M. Kästner, H.-H. Richnow: Monitoring of in situ biodegradation of groundwater contaminants using a test system (BACTRAP) with 13C-labelled substrates J. Weihmann, U. Schulte und T. Mansfeldt: Stabile Isotope (C, N) zur Herkunftsbestimmung von Cyaniden in belasteten Böden Vorstellung des Preisträgers der Karleugen Habfast Stiftung und Preisverleihung: Moritz F. Lehmann: Nitrate Isotope Fractionation During Microbial Nitrate Reduction Review: A. Augusti, T. Nicol, M. Öquist, T. Sparrman, J. Schleucher: NMR in Biogeochemistry Session 5: Ökosysteme II: Stoffkreisläufe und Klima A. Telz and G. Gleixner: Seasonal variations in the sources of soil CO2 in a deciduous forest of the national park "Hainich", Germany S. Steinbeiss, G. Gleixner: Variable contribution of soil and plant derived carbon to dissolved organic matter R. Siegwolf, M. Saurer, J. Eitel, R. Vogt: 13C and 18O from Carbon Mono- and Dioxide, two proxies for tracing combustion sources A. Giesemann, S. Schrader, T.-H. Anderson, R. Manderscheid, S. Burkart, A. Pacholski, O. Heinemeyer, H.-J. Weigel: From atmosphere into soil - Carbon (C) translocation in an agro ecosystem under FACE conditions (cancelled) M. Tichomirowa, F. Haubrich, K. Bombach, R. Liebscher: S and O isotope composition of the atmoshere in Saxony (Germany) M. Saurer, C. Reynolds, P. Cherubini, K. Treydte, R. Siegwolf: Changing relation between CO2- and water fluxes in Swiss forests D. Sachse, J. Radke, I. Mügler and G. Gleixner: Compound specific hydrogen isotope rations of biomarkers reconstruct the palaeoclimate