1. Department of Botany, Institute of Ecology and Earth Sciences, University of Tartu, 40 Lai St, 51005 Tartu, Estonia
2. Department of Plant and Environmental Sciences, University of Gothenburg, Box 461, 405 30 Göteborg, Sweden
3. The Mycological Herbarium, Natural History Museum, University of Oslo, PO Box 1172, Blindern, N‐0318 Oslo, Norway
4. School of Biological Sciences, University of Aberdeen, Cruickshank Building, Aberdeen AB24 3UU, UK
5. Centraalbureau voor Schimmelcultures, PO Box 85167, 3508 AD Utrecht, the Netherlands
6. Max Planck Institute for Chemical Ecology, Hans‐Knoell‐Strasse 8, D‐07745 Jena, Germany
7. Department of Biology, University of Oslo, Box 1066, Blindern, N‐0316 Oslo, Norway
8. Biological Institute, Terrestrial Ecology, University of Copenhagen, Øster Farimagsgade 2D, DK‐1353 Copenhagen, Denmark
9. The Finnish Forest Research Institute, PL 18, FI‐01301 Vantaa, Finland
10. Department of Environmental and Geographical Sciences, Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester M1 5GD, UK
11. Macaulay Institute, Craigiebuckler, Aberdeen AB15 8QH, UK
12. Beronem AB, Kullagränd 6, 239 42 Falsterbo, Sweden
13. Department of Biology, University of Washington Seattle, Box 351330, 235 Johnson Hall, WA 98195, USA
14. Institute of Microbiology, University Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria