Iowa Natural Heritage Foundation

Nature Walk: Lichens & Ice

Posted on February 18, 2013 at 10:00 AM by Taylor Eisenhauer

All Rights Reserved Carl Kurtz

Lichens are primitive plants that may colonize tree bark, rock surfaces, shingles, tile roofs, or steel implements exposed to the weather. On this old walnut tree the deeply furrowed bark has been coated with ice after a freezing rain. It’s texture is enhanced by the ice and enriched in color by surface wetness. Lichens have a symbiotic relationship with fungi and algae. The fungus is incapable of producing its own food except by decomposition, but through its partnership with algae it is able to produce food by photosynthesis.

The phenomenon that occurs when lichens and ice mix is just one of many unique seasonal wonders. What are some of your other favorites?

If you are interested in purchasing a print or requesting information on possible use for any of these photographs, please contact Carl at cpkurtz@netins.net.

Categories: Blog Posts

Tagged As: Nature walk

Stay connected

14 July

Heritage Valley Summer Seed Harvest (Waukon)

Heritage Valley

19 July

RAGBRAI Expo

Orange City

20 July

RAGBRAI Route Booth

Milford

© 2025 Iowa Natural Heritage Foundation. All rights reserved.