1. Radboud University Nijmegen, Institute for Water and Wetland Research, Department of Animal Ecology and Ecophysiology, Mail Box 31, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands
2. Australian Rivers Institute–Coasts and Estuaries, Griffith University, Gold Coast Campus, Queensland 4222 Australia
3. Southern Seas Ecology Laboratories, School of Earth and Environmental Sciences, DX 650 418, University of Adelaide, Adelaide SA 5005 Australia
4. Wageningen IMARES, Location Den Helder, P.O. Box 57, 1780 AB Den Helder, The Netherlands
5. Radboud University Nijmegen, Institute for Water and Wetland Research, Department of Experimental Plant Ecology, Mail Box 31, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands