Which one is first colonizer of bare rock/pioneer community in xerarch?

Annual herb

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Perennial herb

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Lichen/Moss

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Scrub

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Forest

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Solution

The correct option is C Lichen/Moss
Xerarch originally refers to dry habitat. A dry habitat can sustain only a certain number of living organisms. These organisms can live in the xerarch ecosystems. Crustose lichens and mosses are the ones that grow in a xerarch. Lichens are one of the most primitive organisms. They existed even when the lithosphere was not there.
So, option C is the correct answer.

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Similar questions

Q. Which of the following would appear as pioneer organisms on bare rocks?

Q. Which of the following would appear as the pioneer organisms on bare rocks ?

Q. Name the pioneer species on a bare rock. How do they help in establishing the next type of vegetation? Mention the type of climax community that will ultimately get established.

Q. Starting from the pioneer species, trace the sequence that follows in an ecological succession on a bare rock, until climax community is reached in an ecosystem. Name this type of succession. [3 marks]

With respect to the given assertion and reason, choose the right option

Assertion [A]: Lichens are the primary colonizers of bare rocks.
Reason [R]: Lichens are called pioneer organisms.

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