Secondary and primary ecological succession

Question

Explain what is difference between the secondary ecological succession and the primary ecological succession?

Answer 1

Primary ecological succession is defined as the changing sequence of the communities from first biological occupation of the place where there was previously no living beings. Such as, colonization and following succession of the communities are in the bare rock.

Secondary ecological succession is defined as the changing sequence of communities from substitution of the community by a new one within the given place. Such as, the ecological succession from invasion of the plants and animals are in an abandoned crop or land.