1. EcoNetLab; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig; Deutscher Platz 5e 04103 Leipzig Germany
2. Institute of Biodiversity; Friedrich Schiller University Jena; Dornburger-Street 159 07743 Jena Germany
3. Systemic Conservation Biology Group; J. F. Blumenbach Institute of Zoology and Anthropology; Georg-August University of Göttingen; Berliner Street 28 37073 Göttingen Germany
4. Research Group Aquatic Ecology and Nature Conservation; Department of Biology and Environmental Sciences; Carl von Ossietzky University of Oldenburg; Ammerländer Heerstraße 114-118 26111 Oldenburg Germany
5. Noldus Information Technology BV; Nieuwe Kanaal 5 6709 PA Wageningen The Netherlands
6. National Great Rivers Research and Education Center (NGRREC); One Confluence Way East Alton Illinois 62024 USA
7. Department of Biology; Washington University in St. Louis; St. Louis Missouri 63105 USA