How is self-regulation of biogeocenosis carried out?

Biogeocenosis is a stable, historically formed ecosystem in which organic elements (plants, animals) are closely related to inorganic ones (air, soil, water). Examples of biogeocenoses in the middle zone: forest, lake, river. Self-regulation, as a result of which the constituent components of the biogeocenosis are maintained at a certain level, is carried out due to the circulation of substances and the dependence of all components of the ecosystem from each other. Thanks to these properties, a dynamic balance is established: for example, an increase in the number of rodents increases the number of predators, and after the extermination of rodents, the number of predators decreases, since they die of hunger.