1. Department
of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Box 7050, SE-75007 Uppsala, Sweden
2. Department of Ecosystem Science & Management, Pennsylvania State University, University Park, Pennsylvania 16802, United States
3. Department
of Limnology and Bio-oceanography, University of Vienna, A-1090 Vienna, Austria
4. Department
of Forest Ecology and Management, Swedish University of Agricultural Science, SE-90183 Umeå, Sweden
5. Department
of Applied Environmental Science, Stockholm University, SE-10691 Stockholm, Sweden
6. Department
of Earth Sciences, Uppsala University, SE-75236 Uppsala, Sweden