List out the characteristics of ecological succession.

Explanation

It is a systematic process which causes changes in specific structure of plant community.
  It is resultant of changes of abiotic and biotic factors.
  It transforms unstable community into a stable community.
Gradual progression in species diversity, total biomass, niche specialisation, and humus content of soil takes place.
  It progresses from simple food chain to complex food web.
It modifies the lower and simple life form to the higher life forms.
  It creates inter-dependence of plants and animals.