What are the reasons for the change of biogeocenoses?

1) the reasons for the change of biogeocenoses: climate change, human activities, natural disasters, as well as changes in the habitat of the species living in them;
2) crowding out older species with more competitive species;
3) an increase in species diversity, food chains, the formation of a closed cycle of substances – the causes of the emergence of a more stable biogeocenosis.

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