Define ecological succession. List any two characteristics of it. Distinguish between primary and secondary succession.

Explanation

Ecological succession. Response of a biotic community to environment vary farm an individual response. Composition and structures of biotic communities constantly change in response to the changing environmental conditions. Change in biotic communities is orderly and sequential parallel with the changes in physical environment till there is a stable community called climax community which is near equilibrium with the environment
(i) Succession is the universal process of development of community in a given particular area.
There is a gradual and fairly predictable changes in the species composition of a given area is called ecological succession.
(iii) during Succession the species with colonise a base area for the first time area called pionner species the population of pioneer species. The population of pioneer species become numerous as there is no competition.
(iv) the entire sequence of communities the successively change in a given area are called seres. The various stages observed in the development of a succession. the individual transitional communities area called seral stages or seral communites.
v) In the sequence serial stages , there is a change in the diversity of species, increase in the number of species and organisms and also in the total biomass.
(vi) climax species are the which appear terminate to the development of succession They do not change further. the succession always proceeds from hydric or xeric conditions to mesic conditions.