Department of Environmental Science Institute of Environmental and Natural Sciences Lancaster University Lancaster LA1 4Yq UK.;
Environment Agency Centre for Ecotoxicology Wallingford Oxfordshire Uk.;
Centrefor Ecology and Hydrology Monks Wood Cambridgeshire PE28 2LS UK.;
Centrefor Ecology and Hydrology Monks Wood Cambridgeshire PE282LS UK.;
Department of Environmental Science Institute of Environmental and Natural Sciences Lancaster University Lancaster LA1 4YQ UK.;