1. Department of Freshwater Conservation; Brandenburg University of Technology Cottbus-Senftenberg; Bad Saarow Germany
2. Department of Experimental Limnology; Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB); Stechlin Germany
3. Forest Soils and Biogeochemistry; Swiss Federal Institute for Forest, Snow and Landscape Research (WSL); Birmensdorf Switzerland
4. Department of Ecology; Berlin Institute of Technology (TU Berlin); Berlin Germany