1. Bio‐Protection Research Centre Lincoln University PO Box 85084 Lincoln 7647 New Zealand
2. School of Biological Sciences University of Aberdeen Cruickshank Building Aberdeen AB24 3UU UK
3. New Phytologist Central Office Lancaster University Bailrigg House Lancaster LA1 4YE UK
4. Department of Botany Institute of Ecology and Earth Sciences University of Tartu 40 Lai St 51005 Tartu Estonia
5. Département Systématique et Evolution Muséum national d'Histoire naturelle UMR 7205 ISYEB CP 50 45 rue Buffon Paris 75005 France
6. Agroscope – Institute for Sustainability Sciences Reckenholzstrasse 191 CH‐8046 Zurich Switzerland
7. Lab of Excellence ARBRE INRA UMR 1136 INRA‐Université de Lorraine ‘Interactions Arbres/Micro‐organismes’ 54280 Champenoux France