The algal element of lichens is protected from UV radiation by a fungal skin.
Image: Auntie P /

One of many forms of lichen. 

Image: Van /

Lichen

Image: Torrey Ritter /
Image: Christine Phillips /

This illustration was submitted as part of an entry for the 2011 Student Design Challenge. The illustration shows a passive indoor system for filtering air and protecting employees from excess UV light.

“Others [lichens] develop minuscule branches and grow into dense curling thickets a few inches high. Their outer skin is formed by the compacted threads of the fungi and is sufficiently impermeable to prevent the loss of water from the partnership; beneath are the algal cells, kept moist and protected from harmful ultra-violet radiation by the fungal skin; and below them, in the centre of the structure, there is looser tissue, also provided by the fungus, where food and water is stored.” (Attenborough 1995:216)

Last Updated August 18, 2016