UNDP/GEF DANUBE REGIONAL PROJECT “STRENGTHENING THE IMPLEMENTATION CAPACITIES FOR NUTRIENT REDUCTION AND TRANSBOUNDARY COOPERATION IN THE DANUBE RIVER BASIN“ ACTIVITY 1.1.7 IMPLEMENTING ECOLOGICAL STATUS ASSESSMENT IN LINE WITH REQUIREMENTS OF EU WATER FRAMEWORK DIRECTIVE USING SPECIFIC BIO-INDICATORS FINAL REPORT prepared by Dr. Mario Sommerhuser Dipl. Biol. (RO) Sabina Robert Dipl. Umweltwiss. Sebastian Birk PD Dr. Daniel Hering at University of Duisburg-Essen D-45117 Essen, Germany Univ. Prof. Dr. Otto Moog DI Dr. Ilse Stubauer DI Thomas Ofenbck at BOKU University of Natural Resources and Applied Life Sciences A-1180 Vienna, Austria December, 2003