1. Department of Chemistry Umeå University Umeå Sweden
2. Department of Ecology and Environmental Sciences Umeå University Umeå Sweden
3. Institute of Zoology of the University of Cologne Department of General Ecology & Limnology Ecological Field Station Grietherbusch Rees Germany
4. Biological and Environmental Sciences School of Natural Sciences University of Stirling Stirling UK
5. Departments of Wildlife, Fish, and Environmental Studies Swedish University of Agricultural Sciences Umeå Sweden