lichens can be used as air pollution indicators especially sulphur dioxide. If there are no lichens in the local area but just algae it shows there is a lot of sulphur dioxide in the atmosphere. So they can be used as a environmental indicator because by of the fact they do not grow in sulphur dioxide rich atmospheres.
September 25, 2016 at 6:09 pm
Agreed! But some Lichen can grow in polluted areas. Which ones? Why are they able to do this?
KC