1. Ecology Centre, Department of Hydrology and Water Resources Management, Christian‐Albrechts‐University, Olshausenstr. 40, D‐24098 Kiel, Germany
2. Institute of Landscape Ecology and Resources Management, Division of Waste Management and Environmental Research, Justus‐Liebig‐University, Heinrich‐Buff‐Ring 26C, D‐35392 Gießen, Germany