What is the main difference between primary succession and secondary succession?

What is the main difference between primary succession and secondary succession?

a. Primary succession begins with the formation of soil from parent material while secondary succession has soil already present.

b. Primary succession begins with large plants like trees while secondary succession begins with shrubs.

c. Secondary succession begins with formation of soils from parent material while primary succession begins with soil.

d. Secondary succession occurs quickly while primary succession is very slow.

Answer: Ones which are initiated where life itself had never settled are known as primary succession, such as on rocks that have just been formed or in dunes. It involves the derivation of soil from the weathered parent material (which could either be rocks or other inorganic materials) and the gradationally attained stand of space by true pioneers to the subsequent establishment of a complex ecosystem.

The second type of ecological succession that occurs is called secondary succession and this happens in regions that were once home to an ecological system but is disturbed or destroyed but where the soil is still present. This may happen in such areas following calamities such as fires or floods, or due to human activities like deforestation or reclamation of agricultural land. Ecosystem succession in the given case starts with primary succession then we have secondary succession at the same site; this is advantageous because it will take less time for recolonization and recovery since the soil is already present.