1. Laboratory of Aquatic Ecology, Evolution and Conservation; University of Leuven; Deberiotstraat 32; B-3000; Leuven; Belgium
2. Systemic, Physiological and Ecotoxicological Research Group; University of Antwerp; Groenenborgerlaan 171; Antwerp; B-2020; Belgium
3. Société Française d'Odonatologie; 7 rue Lamartine; Bois-d'Arcy; F-78390; France
4. Department of Ecology and Environmental Science; Umeå University; Linnaeus väg 6; SE-90187; Umeå; Sweden