1. Department of Ecology Charles University Prague Czech Republic
2. Czech Academy of Sciences Institute of Vertebrate Biology Brno Czech Republic
3. Department of Biology Lund University Lund Sweden
4. U.S. Geological Survey Fort Collins Science Center Denver Colorado USA
5. Institute of Limnology University of Konstanz Constance Germany
6. Department of Geography and the Environment University of Denver Denver Colorado USA
7. Department of Integrative Biology University of Colorado Denver Denver Colorado USA