Question

Are lichens harmful to humans?

Answer 1

Lichens

1. Lichens are composite organism that lives symbiotically.
2. Algae or cyanobacteria along with fungi are in a mutual association forming lichens.
3. The fungal partner is the major part and provides shelter and protection while the algae provide it with viable nutrients through photosynthesis.
4. Lichens are usually not harmful to humans but some are poisonous.
5. Wolf lichen (Letharia vulpina) is an example of poisonous lichen species that is high in vulpinic acid.
6. Lichens also act as pollution indicators as they are susceptible to pollutants and do not grow in polluted areas.