Why does lichen abundance increase as the light intensity increases.

Question

I need to have a detailed answer. I am referring to all types of lichen. Please give sources. Thank you.

Answer 1

Lichens  are symbiotic associations of a fungus (the mycobiont) with a photosynthetic partner (the photobiont also known as the phycobiont) that can produce food for the lichen by photosynthesis.  Thus increasing light intensity will increase photosynthesis and productivity of the photobiont and result in increased growth just as green plants grow better in increased light.