1. Forest and Nature Lab, Campus Gontrode, Dept of Environment, Ghent Univ. Geraardsbergsesteenweg 267 BE‐9090 Melle‐Gontrode Belgium
2. DYNAFOR, Univ. de Toulouse, INRA, INPT, INPT‐EL PURPAN Castanet‐Tolosan France
3. Biogeco, INRA, Univ. de Bordeaux Cestas France
4. CESCO, Museum national d'Histoire naturelle, CNRS, Sorbonne‐Univ. Paris France
5. Dept of Forest Mycology and Plant Pathology, Swedish Univ. of Agricultural Sciences Uppsala Sweden
6. Laboratory of Plant and Microbial Ecology, InBioS, Dept of Biology, Ecology, Evolution, Univ. of Liège Liège Belgium
7. Dept of Forestry, College of Agriculture, Wollo Univ. Dessie Ethiopia
8. Dept of Earth and Environmental Sciences, KU Leuven Leuven Belgium
9. Centre of Evolutionary and Functional Ecology, UMR5175, CNRS – Univ. of Montpellier – Univ. Paul‐Valéry Montpellier – EPHE 1919 Montpellier France
10. Biological and Environmental Sciences, Univ. of Stirling Stirling UK
11. School of Biological Sciences, Royal Holloway Univ. of London, Egham Surrey UK
12. Dept of Organismal Biology, Uppsala Univ. Uppsala Sweden
13. Dept of Systematic Botany and Functional Biodiversity, Univ. of Leipzig Leipzig Germany
14. Dept of Geosciences and Natural Resource Management, Univ. of Copenhagen Frederiksberg Denmark
15. Geobotany, Faculty of Biology, Univ. of Freiburg Freiburg Germany
16. Kapelle‐op‐den‐Bos Belgium
17. Inst. of Plant Sciences, Univ. of Bern Bern Switzerland