Why ecological successions are a mechanism: ecosystem development, ecosystem self-support, ecosystem restoration.

Ecosystem development – for example, overgrowing of a marshland and turning into a forest;
Self-support of ecosystems – constant metabolism;
Ecosystem restoration – lead to the formation of stable, mature biocenoses.

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.