Q10 of 67 Page 101

Among bryophytes, lichens and fern which one is a pioneer species in a xeric succession?

• Lichens are the pioneer species, which are the first to invade the bare land.


• Lichen releases acidic chemicals which cause weathering in rocks.


• Weathering results in formation of soil and releases minerals required for the growth of seral communities.


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In the North East region of India, during the process of jhum cultivation, forests are cleared by burning and left for regrowth after a year of cultivation. How would you explain the regrowth of forest in ecological term?

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