1. Department of Surface Waters Research and ManagementEawag Oberflachengewasser Kastanienbaum Switzerland
2. School of Animal, Rural and Environmental SciencesNottingham Trent University Nottingham UK
3. School of Science and TechnologyNottingham Trent University Nottingham UK
4. DJL Ecologists Ltd., Old Bells Farm Dereham UK
5. Environmental Research Associates, Exeter Exeter UK
6. Environment Agency, Red Kite House Wallingford UK