| Abstract: | The paper shows that in addition to the qualitative characteristics that are of rather informative value for evaluation of the sanitary and ecological conditions of environmental objects, there are suitable qualitative characteristics that may reveal the changes preceding irreversible changes in the natural environment. As such, the factors of persistence which are rather widely prevalent in aquatic microorganisms. By taking into account that the persistent properties of microorganisms label an ecological affiliation of bacteria, ecological type-specific differences of hydrobionts in persistent characteristics, they may be used as informative criteria for an indicator value in sanitary and ecological work. The value of these materials is great in the applied point of view as just now they open up vistas for microbiological monitoring and ecological studies of natural water reservoirs. |
