1. Rijkswaterstaat, Water Management Centre, Zuiderwagenplein 2, 8224 AD Lelystad, The Netherlands
2. Universität für Bodenkultur Wien, Inst. f. Wildbiologie und Jagdwirtschaft, Gregor Mendel Str. 33, 1180 Wien, Austria
3. Université de Rennes 1, UMR CNRS 6553 ECOBIO, Campus Beaulieu, 35042 Rennes cedex, France
4. Aarhus University, Department of Bioscience, Kalø, Grenåvej 14, DK-8410 Rønde, Denmark
5. Natagora, Département Études, Traverse des Muses 1, B-5000 Namur, Belgium
6. Institute for Environmental Protection and Research (ISPRA), Via Ca' Fornacetta 9, 40064 Ozzano Emilia (BO), Italy
7. UK Centre for Ecology & Hydrology, Bush Estate, Penicuik, Midlothian, EH26 0QB, United Kingdom