Ques. 1AIPMT 2011 (Prelims)
Which one of the following statements is correct for secondary succession?
- It follows primary succession
- It occurs on deforested site
- It is similar to primary succession except that it has a relatively fast pace.
- It begins on a bare rock.
Answer
(2) It occurs on deforested site
Solution
As per NCERT, secondary succession begins in areas where natural biotic communities have been destroyed, such as abandoned farm lands, burned or cut forests and lands that have been flooded.
A deforested site already has soil, so secondary succession occurs there, which is why (2) is correct.
It does not need to follow primary succession, since a start on bare rock happens only in primary succession.
It is faster, but it also differs in starting conditions (soil present) and in its first community, so (3) is not correct.
Answer: (2)