Good day, Aspirant...

I'm attempting to use points to describe the solution to your query.

1)The formation of new habitats in barren and lifeless areas that are unaltered and unspoiled by any pre-existing living forms is referred to as primary succession in ecological terms. Secondary succession, on the other hand, is the growth of habitat that occurs after the loss of an existing habitat and ecosystem.

2) In areas where primary succession occurs, there is no initial vegetation. However, in areas where secondary succession occurs, beginning vegetation is always present.

3) An external agent or a biological element stimulates primary succession (for eg, lichens on barren rock are responsible for weathering of those rocks to form fertile soil). Only an external source triggers secondary succession in this situation.

4) Soil is lacking before primary succession begins, but it is always present before secondary succession begins.

5) The species that start the primary succession process invariably come from another ecosystem. These are known as pioneer species (eg, lichens). Secondary succession is initiated by species from the same ecosystem.

6) Primary succession takes a lengthy time, however secondary succession takes less time.

7) The creation of a new ecosystem after a volcano, glacier eruptions, or a nuclear explosion are all examples of primary succession. Secondary succession can occur as a result of fire, harvesting, logging, or abandonment of land, or as a result of disease outbreaks.

I hope this information is useful.

Regards.