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Show some love for nature's hero

The Sentinel

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January 15, 2026

LICHENS ARE OFTEN DISMISSED AS STAINS BUT THEY'RE INCREDBLY BENEFICIAL TO US AND OUR ECOSYSTEM

- DIARMUID GAVIN

RECENTLY I was asked how to remove stains from a path. My initial reaction was to suggest a power wash as this will usually leave the place spick and span. However on closer inspection the stains appeared to be a form of plant life, namely lichens, growing on the path.

Lichens are a unique combination of two different organisms. They combine a fungus and an algae or cyanobacteria. These live together, the fungus providing shelter for the algae, and the algae providing carbohydrates via photosynthesis in turn. This is an example of a symbiotic relationship which is mutually beneficial to both species.

FLERE HISTORIER FRA The Sentinel

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