1 Lake Ecology, Department of Ecoscience and Arctic Research Centre, Aarhus University, Aarhus, Denmark. thd@ecos.au.dk.
2 WATEC Aarhus University Centre for Water Technology, Aarhus University, Aarhus, Denmark. thd@ecos.au.dk.
3 Environmental Change Research Centre, Department of Geography, University College London, Gower Street, London, WC1E 6BT, UK.
4 Lake Ecology, Department of Ecoscience and Arctic Research Centre, Aarhus University, Aarhus, Denmark.
5 WATEC Aarhus University Centre for Water Technology, Aarhus University, Aarhus, Denmark.
6 Sino-Danish Centre for Education and Research (SDC), University of Chinese Academy of Sciences, Beijing, China.
7 Limnology Laboratory, Department of Biological Sciences and Centre for Ecosystem Research and implementation, Middle East Technical University, Ankara, Turkey.
8 Institute of Marine Sciences, Middle East Technical University, Erdemli-Mersin, Turkey.
9 School of Health and Life Science, & National Horizons Centre, Teesside University, Middlesbrough, TS1 3BX, UK.
10 Aquatic Ecosystem Analysis, Helmholtz-Centre for Environmental Research - UFZ, Brückstr. 3a, 39114, Magdeburg, Germany. daniel.graeber@ufz.de.