1. Department of Environmental and Biological Sciences University of Eastern Finland Kuopio Finland
2. Division of Terrestrial Ecosystem Research, Department of Microbiology and Ecosystem Science University of Vienna Vienna Austria
3. Department of Geosciences and Natural Resource Management University of Copenhagen Copenhagen K Denmark
4. Faculty of Environmental Sciences and Natural Resource Management Norwegian University of Life Sciences Ås Norway
5. Laboratory for Air Pollution & Environmental Technology, Swiss Federal Laboratories for Materials Science and Technology, Empa Dübendorf Switzerland
6. Rothamsted Research, North Wyke Okehampton Devon UK
7. Isotope Bioscience Laboratory‐ISOFYS, Department of Green Chemistry and Technology Ghent University Ghent Belgium
8. Forschungszentrum Jülich GmbH Institute of Bio‐ and Geosciences—Agrosphere (IBG‐3) Jülich Germany
9. Hydroisotop GmbH Woelkestr Schweitenkirchen Germany
10. Geological Survey of Israel Jerusalem Israel
11. Agriculture and Food CSIRO Urrbrae South Australia Australia
12. Department of Geography Université de Montréal Québec Canada
13. Stable Isotope Laboratory Institute of Geological Sciences, Polish Academy of Sciences Warszawa Poland
14. Micro‐area Analysis Laboratory Polish Geological Institute—National Research Institute Warszawa Poland