Institution: | aGeological Survey of Norway (NGU), N-7491 Trondheim, Norway;bNorwegian Forest and Landscape Institute, Raveien 9, N-1431 Ås, Norway;cDepartment of Freshwater Ecology, Faculty of Life Science, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria;dEarth Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria |