1. Department of Aquatic Ecology Netherlands Institute of Ecology (NIOO‐KNAW) P.O. Box 50 Wageningen 6708 PB The Netherlands
2. Department of Ecosystem Research Leibniz‐Institute of Freshwater Ecology and Inland Fisheries (IGB) Müggelseedamm 301 Berlin 12587 Germany
3. Department of Environmental Solution Technology Faculty of Science and Technology Ryukoku University 1‐5 Yokotani, Seta Oe‐cho Otsu 520‐2194 Japan
4. Institute of Oceanography National Taiwan University No. 1, Section 4, Roosevelt Road Taipei 107 Taiwan
5. Graduate School of Environment and Information Sciences Yokohama National University 79‐7, Tokiwadai Hodogaya‐ku 240‐8501 Japan
6. Institute of Environmental Biology University of Utrecht P.O. Box 80.056 Utrecht 3508 TB The Netherlands
7. Faculty of Environmental Sciences and Natural Resource Management Norwegian University of Life Sciences P.O. Box 5003 Ås NO‐1432 Norway