1. Norwegian Institute for Water Research, 0579 Oslo, Norway
2. Biology Centre, Academy of Sciences of the Czech Republic (CAS), Institute of Hydrobiology, 370 05 České Budějovice, Czech Republic
3. Norwegian Institute of Bioeconomy Research, Division of Environment and Natural Resources, 1431 Ås, Norway
4. Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, 1433 Ås, Norway
5. Norwegian Institute for Urban and Regional Research, Oslo Met-Oslo Metropolitan University, 0130 Oslo, Norway
6. Drikkevannskonsult, 7047 Trondheim, Norway