Question

Q.73. Give the ecological importance of lichens. ​

Answer 1

Answer:

GOOD NIGHT

Explanation:

Lichen also plays an important role in fixing nitrogen. ... This conversion of nitrogen impacts the ecosystem because when it rains, nitrates are leached from lichens and is used by soil-based plants. - Lichen needs clean air to grow. They are not able to tolerate pollution.

Answer 2

Explanation:

Ecological importance of lichens:

i. Lichens are the pioneers of vegetation, occuring on rocks.

ii. Lichens are the first plants to settle on barren rocks.

iii. Rhizoids of lichen secrete organic acids such as carbonic acids and oxalic acids due to which rocks get broken and soil formation takes place. This process is called pedogenesis.

iv. Such soils create favourable conditions for bryophytes and other higher plants to grow.

______________________,_______