Secondary succession can happen after primary succession or independently of primary succession

The statement is true

Explanation:

Primary succession is a sequences of events that occur where no ecosystem previously existed. On the other hand, secondary succession is a type of ecological succession that exists on a pre-existing soil, it can happen from events such as hurricanes, fires, tsunamis, earthquakes, etc. These kinds of events modify the population of an ecosystem but not it all.  So we can say that secondary succession can happen after or without a primary succession.

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