LAKE SHORE DETERIORATION, REED MANAGEMENT AND BANK RESTORATION IN SOME CENTRAL-EUROPEAN LAKES

The causes of lakeshore deterioration and reed decline are concisely s ummarised, and demonstrated with examples of seven Central European la kes (Germany: Havel lakes, Lake Constance-Untersee, Lake Constance-Obe rsee; Switzerland: Lake Zurich, Lake Biel, Lake Neuchatel, Lake Geneva ). The main causes are assumed to be bank erosion, lake eutrophication , mechanical damage to the reeds, and recreational activities. Counter measures can be grouped into: reed protection against mechanical load (fences), wave dissipative constructions (refilling of substrate, brus hwood fascine), nutrient export from the reeds (winter mowing), and su pplementary measures (reed plantations, prohibition of access for the public). Favourable issues and undesired results are discussed. It is stated that there is a need for fundamental research and scientific su rveillance of the restoration measures to avoid ill effects in the fut ure.