1. Institute of Ecology; Friedrich Schiller University Jena; Jena Germany
2. Department of Geosciences; Virginia Tech; Blacksburg VA USA
3. Institute of Geosciences; Friedrich Schiller University Jena; Jena Germany
4. U.S. Geological Survey; Reston VA USA
5. Department of River Ecology; Helmholtz Centre for Environmental Research Leipzig-Halle - UFZ; Magdeburg Germany
6. German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig; Leipzig Germany