Assessment of water quality of Lake Kenon by plankton state (Trans-Baikal region)

Lake Kenon is a natural water body, located in the city area and carrying a huge industrial and recreational load. Assessment of saprobity conducted by Pantle – Bucc method in modification of Sladechek to phyto- and zooplankton number allowed revealing relatively small differences in the values of saprobity in the water area and the seasonal aspect. Saprobity indices in the lake Kenon on planktonic forms of algae in the summer and in the autumn of 2010–2011 ranged from oligobetamezosaprobic to the betamesosaprobic zone, on planktonic invertebrates – from oligosaprobic to oligo-alfamezosaprobic zone. The quality of water by biological indicators is characterized as clean – satisfactory clean (II–III class). Water body can be used for domestic and recreational use.