Multiple choice

What do you mean by secondary succession?

Ecological succession is the process of changes in the species structure of an ecological community over time. Within any community some species may become less abundant over some time, or they may even disappear from the ecosystem. Similarly, over some time interval, other species within the community may become more abundant, or new species may appear in the community from adjacent ecosystems.

  1. It defines the dominant organisms that are autotrophs, and it starts in an inorganic environment.

  2. It starts on a substance where there are no living organisms.

  3. It establishes that the causative factor behind succession is not the community itself but the physical surrounding.

  4. It describes the phenomenon whereby the organisms of a community modify the environment in such a way that the community itself is replaced by a new one.

  5. It begins on a substratum where there was living organism previously but has diminished due to some natural disaster.
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E Correct answer
Explanation

Secondary succession begins on a substratum where there was living organism previously but has diminished due to some natural disaster, e.g., grass -> shrub -> trees -> oak hickory forest. Secondary succession is much more commonly observed and studied than primary succession.

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