Q.Generally in summer the forest are affected by natural fire. Over a period of time it recovers itself by the process of successions. Find out the types of succession and explain.
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Start your 14-day free trial to unlock the full solution →Step 1. The chapter defines secondary succession as 'the development of a plant community in an area where an already developed community has been destroyed by some natural disturbance (Fire, flood, human activity),' giving the specific example of 'the forest destroyed by fire and excessive lumbering may be re-occupied by herbs over a period of time.'
Step 2. In the scenario described, a forest area already had an established plant community before the summer fire struck — the fire destroys this existing vegetation, but crucially the underlying soil (already built up by the earlier forest) remains in place.
Step 3. This distinguishes it from primary succession, which by definition starts on a barren area 'where no community existed before' and where no soil is present at the outset — primary succession pioneers (microbes, lichens, mosses) must build soil from scratch, a much slower process.
Step 4. Because soil cover is already present after a fire, recolonisation proceeds faster than primary succession would — annual herbs and grasses recolonise first, followed over time by shrubs and eventually trees, gradually rebuilding toward the original forest-type climax community. …
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