Secondary succession is much faster than primary succession because
-
pioneer colonizers are more in number
- soil is already present
- secondary seres require less nutrients
- species competition is increased
The correct answer is: A
Explanation
Secondary succession is usually much quicker than primary succession for the following reasons:There is already an existing seed bank of suitable plants in the soil.
Root systems undisturbed in the soil, stumps and other plant parts from previously existing plants can rapidly regenerate.
The fertility and structure of the soil has also already been substantially modified by previous organisms to make it more suitable for growth and colonization.