Affiliation: | a Swedish Museum of Natural History, Dept. of Contaminant Research, SE-104 05 Stockholm, Sweden b Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), D-57377 Schmallenberg, Germany c Institute of Applied Ecology Ltd., Alte Dorfstrasse 11, D-18184 Neu Broderstorf, Germany d Swedish Board of Fisheries, SE-740 71 Öregrund, Sweden e Aarhus University, National Environmental Research Institute, DK-4000 Roskilde, Denmark f University of Trier, Department of Biogeography, D-54296 Trier, Germany g University of Gothenburg, Dept. of Zoology, SE-405 30 Gothenburg, Sweden h Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences, Centre for Limnology, 61117 Rannu, Tartu County, Estonia |