How is knowledge about indicator species useful?

The impact of pollutants on aquatic biogeocenoses usually manifests itself in changes in the structure of communities and the composition of animal and plant species. Dominant (predominant) species, such as stoneflies, mayflies, and caddisflies, whose populations decrease when the reservoir is polluted, serve as bioindicators (indicators) of the cleanliness or pollution of water bodies.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.