SafePlants

Lichens and Their Interactions with the Environment

This document provides insights into various aspects of lichens, including their ecological roles, growth habits, and interactions with their environment. It also touches on the use of the term "lichen" in the context of skin disorders.

Considerations for Pets

• Some lichens are described as "narcotic lichens," although their specific effects and potential danger to pets are not outlined in the text.

Considerations for Children

• The text mentions lichens growing on rocks and in cracks, which may be of interest to children exploring the outdoors.

Common Names

• Cracked Lichen
• Water Cracked Lichen
• Cracked Shield Lichens
• Narcotic Lichen

Taxonomy and Nomenclature

• Species: Acarospora aeruginosa Hasse
• Species: Acarospora immersa Fink

Distribution and Habitat

• Lichens are found in diverse environments, including rocks, bark, and soil surfaces.
• Narcotic lichens specifically grow in desolate parts of the Rockies.

Ecological Role

• Lichens contribute to the weathering and erosion of rocks by growing in cracks and fissures.
• They can both weaken the rock and protect it from exposure.
• They can trap propagules and water on rough surfaces.

Morphological Characteristics and Growth Habits

• Lichens grow on rocks, often in cracks and hollows.
• They do not have roots but anchor themselves to surfaces using rhizines.
• Crustose lichens may crack up in the center as they age.
• They can absorb and retain significant amounts of water (up to 35 times their weight).

Interactions with Other Organisms

• Lichens involve a symbiotic relationship between a fungus and an alga or cyanobacterium.
• The fungus provides water and minerals, while the alga provides organic carbon.

Quirky Facts

• One passage alludes to a theoretical "sheep-based drug cartel" in relation to "narcotic lichen".