1. Marine and Freshwater Research Centre, Department of Natural Sciences, Galway-Mayo Institute of Technology, Galway, Ireland
2. Laboratoire de Morphologie Fonctionnelle et Evolutive, Institut de Chimie Bât. B6C, Université de Liège, Liège, Belgium
3. Lake Ecosystems Group, Centre for Ecology & Hydrology, Lancaster Environment Centre, Lancaster, UK
4. Environment Agency, Penrith, UK