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Collema nigrescens is gelatinous, without internal structure for its parts. A lichen ( / ˈlaɪkən / LY-kən, UK also / ˈlɪtʃən / LITCH-ən) is a symbiosis of algae or cyanobacteria living among filaments of multiple fungi species, along with a yeast embedded in the cortex or "skin", in a mutualistic relationship.
Lichen, any of about 15,000 species of plantlike organisms that consist of a symbiotic association of algae (usually green) or cyanobacteria and fungi. They are found worldwide and occur in a variety of environmental conditions. Learn about lichen biology with this article.
- The Editors of Encyclopaedia Britannica
Learn what lichens are, how they are formed by symbiosis of fungi and algae or bacteria, and what are their different types and structures. Find out where lichens are found, how they respond to environmental stress, and what are their uses and importance.
Learn about the symbiotic association between fungi and algae or cyanobacteria that forms lichens, their diversity, ecology and evolution. Explore the different types, colours and forms of lichens and how to identify them.
May 29, 2024 · Beyond the main fungal partner and single-celled algae, lichens often harbor a diverse community of bacteria, other fungi, and even tiny multicellular animals like tardigrades and nematodes. So, lichens are actually miniature ecosystems teeming with a diverse community of microbes.
Feb 11, 2023 · Learn about lichens, symbiotic associations between fungi and algae or cyanobacteria. Find out how lichens grow, reproduce, and contribute to the biosphere and human culture.
Lichens are organisms often found growing on bark, leaves, rocks, and even walls. The lichen Letharia vulpina (L.) by Jason Hollinger, used under CC BY-SA 3.0 A lichen looks like one organism but is, in fact, a combination of two very different types of organisms.
