Lichens

On boulders may live some colorful lichens, a "marriage" of algae and fungi. In this partnership, the algae photosynthesize to provide nutrients while the fungi provide protection from environmental extremes. Lichens help to break down rock, a first step in soil formation.

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Lichens

Also see:

Biological Soil Crusts

Although the soil surface may look like dirt to you, it is full of living organisms that are a vital part ...

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