1. Department of AgroecologyAarhus University Foulum Denmark
2. Max Planck Institute for the Science of Human History Kahlaische Str. 10 07745 Jena Germany
3. Leibniz‐Laboratory for Radiometric Dating and Stable Isotope Research, Christian‐Albrechts Universität zu Kiel Kiel Germany
4. Department of Animal ScienceAarhus University Foulum Denmark