Justify that lichens are the pioneer organisms.
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Lichens are the pioneer organisms in the new terrarns
which colonise bare rocks. mountains and clitfs.
corrode the rocks and accumulate a certain amount
mmerals and organic matter, The plants like mossess and
grasses appear later in succession. utilising the first
formed by lichens, Lichens thus. can convert a barren
area Into one that can support vegetation.