Ref ID : 5880
T.D. Slepukhina; Comparison of different methods of water quality evaluation by means of oligochaetes. Hydrobiologia 115:183-186, 1984
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Using as examples water bodies in different geographical zones (Lake Ladoga, the River Sukhona, shallow-water ponds of the North Caucasus) the known methods of water quality evaluation by means of oligochaetes are considered. There is no unique universal method of pollution bioindication in this way. In water bodies of all types the mass development of oligochaetes and the reduction of their species diversity are indications of: (1) large quantities of organic matter; (2) favourable oxygen regime; (3) absence or insignificant quantity of heavy metal solids, petroleum substances and agricultural chemicals; (4) intensive self-purification of the water body.