Institution: | 1Department of Ecology, Faculty of Hydrobiology, University of Duisburg-Essen, D-45117 Essen, Germany 2Bioforum GmbH, Sudetenstr. 34, D-73230 Kirchheim / Teck, Germany 3Senckenberg Research Institute and Natural History Museum, Department of Limnology and Conservation, D-63599 Biebergemünd, Germany 4Bayerisches Landesamt für Wasserwirtschaft, Lazarettstraße 67, D-80636 München, Germany |