Name the factors that ensure the stability of the biogeocenosis of the reservoir.

A biogeocenosis is a specific area with approximately the same habitat conditions, where various living organisms live, which interact with each other. There are stable and unstable biogeocenoses. The more species belong to biogeocenosis, the more stable it becomes. But no less important is the interchangeability of any kind. If any random species can be replaced by another in the biogeocenosis, then the extinction of the species cannot destroy this system. Therefore, such systems are stable.