1. Department of Forest Conservation Forest Research Institute of Baden‐Württemberg (FVA) Freiburg Germany
2. Chair of Silviculture University of Freiburg Freiburg Germany
3. Department of Agricultural Sciences University of Sassari Sassari Italy
4. Austrian Research Centre for Forests BFW Vienna Austria
5. Julius Kühn‐Institut (JKI) Federal Research Centre for Cultivated Plants Braunschweig Germany