Lichens

Lichens

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Credit: COLIN CUTHBERT/SCIENCE PHOTO LIBRARY

Caption: Lichens on rock. Lichen is a symbiotic organism comprising an alga and a fungus. The fungus provides a buffer against harsh conditions for the alga, in return for carbohydrates, which the alga produces by photosynthesis. Lichens are often used as indicator species, as the health of their populations are linked to air pollution.

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Keywords: algae, algal, fungal, fungus, lichen, lichens, mutualism, mutualistic, mycological, mycology, natureplant, rock, symbiont, symbiosis, symbiotic organism

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