Usage of ground invertebrates communities for bio-monitorings of fresh waters

Mainly the control of water ecosystems condition is carried out by their physic-chemical and economic characteristics (i.e. from the viewpoint of water suitability for usage). However, during the monitoring process it is also necessary to use biological parameters: the structure of ground communities, the ratio of separate groups in fauna and numerical growth of these groups. The biological parameters should be considered as structural characteristics for bio-indication purposes.