Change of phytoplankton composition and biodiversity in Lake Sempach before and during restoration

  title={Change of phytoplankton composition and biodiversity in Lake Sempach before and during restoration},
  author={Hansrudolf B{\"u}rgi and Pius Stadelmann},
Lake Sempach, located in the central part of Switzerland, has a surface area of 14 km2, a maximum depth of 87 m and a water residence time of 15 years. Restoration measures to correct historic eutrophication, including artificial mixing and oxygenation of the hypolimnion, were implemented in 1984. By means of the combination of external and internal load reductions, total phosphorus concentrations decreased in the period 1984–2000 from 160 to 42 mg P m−3. Starting from 1997, hypolimnion… CONTINUE READING


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