Oxygen is all around...

Johannes A.C. Barth¹, Robert van Geldern²

1: GeoZentrum Nordbayern, Deutschland; 2: Friedrich-Alexander-Universität Erlangen-Nürnberg

Impact of the 2018-2020 drought in Central Germany on the nitrogen cycling in a meso-scale catchment: Insights from hydrochemical and stable isotope investigations

Christin Mueller, Ronald Krieg, Ralf Merz, Kay Knoeller

Helmholtz Centre for Environmental Research UFZ, Deutschland

Spatiotemporal analysis of Central European young water fractions

Michael Stockinger, Christine Stumpp

Universität für Bodenkultur, Wien, Österreich

Stable water isotope analysis and improved lumped-parameter modeling for characterizing unsaturated subsurface flow

Anne Imig, Fatemeh Shajari, Florian Konrad, Florian Einsiedl, Arno Rein

Chair of Hydrogeology, Faculty of Civil, Geo and Environmental Engineering, Technical University of Munich, Germany

Identifizierung von Oberflächenwasser-Grundwasser-Interaktionen anhand von charakteristischen Isotopensignalen

Michael Engel^1,2, Simon Mischel¹, Sabrina Quanz¹, Dirk Radny¹, Francesco Comiti², Lars Düster¹, Axel Schmidt¹

1: Bundesanstalt für Gewässerkunde, Deutschland; 2: Freie Universität Bozen-Bolzano, Italien

Stable water isotopes as natural tracers in a hydrogeological study of riverbank filtration in N’Djamena, Chad

Maike Gröschke, Lilli Witt, Paul Königer, Sara Vassolo

Federal Institute for Geosciences and Natural Resources (BGR), Groundwater Resources - Quality and Dynamics

Isotopen-hydrobiogeochemische Untersuchungen an anoxischen Grundwässern off- und on-shore der norddeutschen Küste

Michael Ernst Böttcher^1,2,3, Anna-Kathrina Jenner^1,3, Cátia M.E. von Ahn^1,2, Iris Schmiedinger¹, Andreas Roskam⁴

1: Leibniz Institute of Baltic Sea Research (IOW), Deutschland; 2: University of Greifswald, Deutschland; 3: University of Rostock, Deutschland; 4: NLWKN Aurich, Deutschland

Measuring high-resolution geochemical depth-profiles in hyporheic stream sediments with focus on aerobic and anaerobic methane oxidation

Tamara Michaelis, Anja Wunderlich, Florian Einsiedl

Technische Universität München, Lehrstuhl Hydrogeologie, Deutschland

Karstic springs as strong emitters of CO₂

Kern Lee^1,2, Robert van Geldern¹, Johannes Barth¹

1: Friedrich-Alexander Universität Erlangen-Nürnberg (FAU), Deutschland; 2: Alberta Environment and Parks, Edmonton, Canada

Neue Einblicke in die Infiltrationsbedingungen des Oberjura Thermalwassers in der südlichen Bayerischen Molasse mit Hilfe der ¹⁴C_DOC Methode

Theis Winter, Florian Einsiedl

Technische Universität München, Deutschland

Supporting the interpretation of δ¹⁵N values of dissolved NH₄⁺ and NO₃⁻ in the water column of a seasonal stratified lake using Numerical modeling and PCR gene amplification

Gisela Alejandra Pena Sanchez¹, Florian Einsiedl¹, Clara Duffner^2,4, Stephanie Schulz^2,4, Bernhard Mayer³, Anja Wunderlich¹

1: Technical University of Munich; 2: TUM School of Life Sciences; 3: University of Calgary; 4: Helmholtz Centre Munich

Investigation of chloroform degradation mechanisms using multi-dimensional isotope fractionation analysis: Hydrodechlorination over Pd and Rh vs reductive dechlorination with Fe⁰

Berhane Abrha Asfaw^1,2, Kaori Sakaguchi-Söder², Christoph Schüth¹

1: Hydrogeology, Institute IAG, TU Darmstadt; 2: Material Flow Management and Resource Economics, Institute IWAR, TU Darmstadt

Carbon isotope excursions in a Paleocene to early Eocene lignite bearing succession at the southern edge of the proto-North Sea (Schöningen, Germany)

Olaf K. Lenz^1,2, Mara Montag², Volker Wilde¹, Katharina Methner^3,5, Walter Riegel¹, Andreas Mulch^3,4

1: Senckenberg Forschungsinstitut und Naturmuseum Frankfurt, Deutschland; 2: Technische Universität Darmstadt, Institut Für Angewandte Geowissenschaften, Deutschland; 3: Senckenberg Biodiversity and Climate Research Centre (SBiK-F), Frankfurt am Main, Deutschland; 4: Goethe Universität Frankfurt, Institut für Geowissenschaften, Frankfurt am Main, Deutschland; 5: Stanford University, Department of Earth System Science, Department of Geological Sciences, USA

¹⁸O analyses of bulk lipids as novel paleoclimate tool in loess research – a pilot study

Jakob Labahn¹, Philip Hirschmann¹, Lucas Bittner¹, Diana Burghardt², Bruno Glaser³, Slobodan Markovic⁴, Michael Zech¹

1: Physische Geographie mit SP Paläoumweltforschung, Technische Universität Dresden, Deutschland; 2: Institut für Grundwasserwirtschaft, Technische Universität Dresden; 3: Bodenbiogeochemie, Martin-Luther-Universität Halle-Wittenberg; 4: Universität Novi Sad, Serbien

Plant and fungal contributions to soil organic matter fractions assessed by 13C and 15N isotope natural abundances

Saskia Klink¹, Adrienne Keller², Andreas Wild¹, Vera Baumert⁴, Matthias Gube⁵, Eva Lehndorff³, Nele Meyer³, Carsten Mueller⁶, Richard Phillips², Johanna Pausch¹

1: Department of Agroecology, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Germany; 2: Department of Biology, Indiana University Bloomington, IN, USA; 3: Department Soil Ecology, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Germany; 4: Chair of Soil Science, School of Life Sciences, Technical University of Munich, Freising, Germany; 5: Soil Science of Temperate Ecosystems, Büsgen-Institute, Georg-August University Göttingen, Germany; 6: Department of Geosciences and Natural Resource Management, University of Copenhagen, Denmark

Orchid Cremastra appendiculata on the path to self-supply with changing fungal companion

Franziska Zahn¹, Yung-I Lee², Gerhard Gebauer¹

1: BayCEER – Laboratory of Isotope Biogeochemistry, University of Bayreuth, Bayreuth, Germany; 2: Biology Department, National Museum of Natural Science, Taichung, Taiwan

Unravelling shoot:root drought responses in VOC emissions through ¹³C-pyruvate labelling

Erik Daber, Philipp Nolte, Jürgen Kreuzwieser, Mirjam Meischner, Christiane Werner

Chair of Ecosystem Physiology, Albert-Ludwigs-University of Freiburg, Germany

Field 15N pool dilution approach to determine gross nitrification rate

C. Florian Stange, Axel Lamparter, Julia Jaquemotte

BGR, Deutschland

Ein ~15 ka δ²H_n-alkane-Record vom Bichlersee, Oberbayern

Maximilian Prochnow¹, Marcel Bliedtner¹, Paul Strobel¹, Michael Zech², Roland Zech¹

1: Physical Geography, Institute of Geography, Friedrich Schiller University Jena, Jena, Germany; 2: Heisenberg Chair of Physical Geography, Institute of Geography, Technische Universität Dresden, Dresden, Germany

Last millennium hydroclimate variability from Lake Höglwörth, Bavaria, Germany

Sudip Acharya¹, Marcel Bliedtner¹, Paul Strobel¹, Josefin Sperling¹, Thomas Kasper¹, Michael Zech², Roland Zech¹

1: Physical Geography, Institute of Geography, Friedrich Schiller University, Jena, Germany; 2: Heisenberg Chair of Physical Geography, Institute of Geography, Technische Universität Dresden, Dresden, Germany

Ca isotope partitioning upon experimental precipitation of carbonated hydroxy-apatite (CHAP)

Nikolaus Gussone¹, Michael Ernst Böttcher², Anika C. Conrad², Iris Schmiedinger², Jens Fiebig³, Markus Peltz⁴, Georg Grathoff⁴, Burkhard C. Schmidt⁵

1: Institut für Mineralogie, Westfälische Wilhelms Universität Münster; 2: Leibniz Institute of Baltic Sea Research and University of Greifswald, Deutschland; 3: Institute of Geosciences, Goethe-University of Frankfurt, Germany, and Senckenberg Biodiversity and Climate Research Center, Frankfurt (Main), Germany; 4: Economic Geology, University of Greifswald, Germany; 5: Department of Experimental and Applied Mineralogy, Georg-August-University of Göttingen, Germany

Stable isotopic and trace elemental fingerprints in carbonate precipitated by modern hard-water creeks of the temperate climate zone

Michael Ernst Böttcher^1,2, Vera Winde^1,3, Jens Bünning¹, Olaf Dellwig¹, Katrin Müller¹, Ulrich Struck⁴, Maria-Theresia Schafmeister⁵, Peter Escher^1,6

1: Leibniz Institute of Baltic Sea Research, FRG; 2: Marine Geochemistry, University of Greifswald, FRG; 3: Present address: Hydroisotop, Schweitenkirchen, FRG; 4: Naturhistorisches Museum, Berlin, FRG; 5: Applied Geology, University of Greifswald, FRG; 6: Ecoandmore, Freiburg, FRG

Identification of paleosols of a Namibian sediment core (WW203303) using pedogenic features, trace fossils and stable isotope compositions

Feiyu Wang¹, Paul Koeniger², Matthias Hinderer¹

1: TU Darmstadt, Deutschland; 2: Federal Institute for Geosciences and Natural Resources, Geozentrum Hannover

Carbon isotope ratio as a measure of photosynthetic water-use efficiency: reconciling a biophysical discrepancy

John Marshall

SLU, Swedish University of Agricultural Sciences

Impact of nutrient and water availability on grassland functioning - achieving a process based understanding across scales

Maren Dubbert¹, Angelika Kübert², Youri Rothfuss³, Christiane Werner²

1: Zalf, Deutschland; 2: Uni Freiburg, Deutschland; 3: FZ Jülich, Deutschland

Application of 2-dimensional stable isotope measurements of methane to constrain sources and sinks in a seasonally stratified freshwater lake

Teresa Einzmann¹, Moritz Schroll¹, Jan F. Kleint^1,2, Thomas Klintzsch^1,3, Frank Keppler^1,4, Markus Greule¹

1: Institute of Earth Sciences, Heidelberg University, Heidelberg, Germany; 2: MARUM – Center for Marine Environmental Sciences and Department of Geosciences, University of Bremen, Bremen, Germany; 3: Institute for Plant Nutrition, Justus Liebig University, Giessen, Germany; 4: Heidelberg Center for the Environment (HCE), Heidelberg University, Heidelberg, Germany

Belowground C allocation of tropical rainforests in response to drought: an ecosystem ¹³CO₂ labeling approach

lingling shi¹, Pratiksha Acharya¹, Xujuan Bai¹, Niklas Schmuecker¹, Nemiah Ladd², Christiane Werner², Laura.K Meredith^3,4, Michaela Dippold¹

1: Biogeochemistry of Agroecosystems, Department of Crop Science, Faculty of Agriculture, Georg August University of Göttingen; 2: Ecosystem Physiology, University of Freiburg, Freiburg, Germany; 3: School of Natural Resources and the Environment, University of Arizona, Tucson, United States of America; 4: Biosphere 2, University of Arizona, Tucson, United States of America