1. Department of Terrestrial Ecology Netherlands Institute of Ecology (NIOO‐KNAW) P.O. Box 50 6700 AB Wageningen The Netherlands
2. Molecular Interaction Ecology Institute of Water and Wetland Research (IWWR) Radboud University Nijmegen P.O. Box 9010 6500 GL Nijmegen The Netherlands
3. Plant Ecology University of Tübingen Auf der Morgenstelle 3 72076 Tübingen Germany
4. Plant Research International Wageningen University and Research Centre (WUR) P.O. Box 17 6700 AA Wageningen The Netherlands
5. Centre for BioSystems and Genomics P.O. box 98 6700 AB Wageningen The Netherlands
6. Department of Analytical Chemistry Radboud University Nijmegen Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
7. Laboratory of Nematology Wageningen University and Research Centre (WUR) P.O. Box 8123 6700 ES Wageningen The Netherlands