1. Aquatic Ecology and Water Quality
Management Group, Department of Environmental Sciences, Wageningen University, P.O. Box 47, 6700 AA Wageningen,
The Netherlands
2. Subdepartment
of Environmental
Technology, Department of Agrotechnology and Food Science, Wageningen University, P.O. Box 17, 6700 AA Wageningen,
The Netherlands
3. Alterra, Wageningen UR, P.O. Box 47, 6700 AA Wageningen,
The Netherlands
4. Imares, Wageningen UR, P.O. Box 68, 1970 AB IJmuiden,
The Netherlands