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For many years, people used to think lichens were one species. The alga or bacteria provides food through photosynthesis. A lichen is a combination of two organisms, a green alga or cyanobacterium and an ascomycete fungus, living in a symbiotic relationship. The fungus of lichens have a mutualistic symbiotic relationship with algae. The fungal component is called mycobiont while the algae component is called phycobiont. These forests are found in the cold nutrient-rich water off the coast of California. 25+ different algal species are involved in associations, with the majority of them green algae (although some species are cyanobacteria ( … A lichen is a combination of two organisms, a green alga or cyanobacterium and an ascomycete fungus, living in a symbiotic relationship. Whereas algae normally grow only in aquatic or extremely moist environments, lichens can potentially be found on almost any surface (especially rocks) or as epiphytes (meaning that they grow on other plants). Paul G. Wiegman Sun., January 7, 2007 12:00 a.m. | Sunday, January 7, 2007 12:00 a.m. Join the conversation () Email Newsletters . B. Mycobiont: primary mycobiont are mainly Ascomycota, with a few Basidiomycota; recent evidence suggests that Basidiomycota might be a second partner C. Lichens come in different forms - hairlike, crustose, foliose, fructicose, clubby. The identification of lichen as a composite organism of cyanobacteria or algae and fungi dates back 150 years, representing the first identification of such intimate symbiosis. A. Lichens are a symbiotic relationship between a mycobiont (fungal partner) and photobiont (green algae or cyanobacteria). TribLIVE's Daily and Weekly email newsletters deliver the news you want and information you need, right to your inbox. Ed Reschke /Oxford Scientific/Getty Images. The fungi provide protection and moisture to the algae, and the algae feed the fungi with photosynthetic nutrients. Lichens are sensitive to atmospheric pollution. Whereas algae normally grow only in aquatic or extremely moist environments, lichens can potentially be found on almost any surface (especially rocks) or as epiphytes (meaning that they grow on other plants). Lichens result from the symbiotic union between fungi and algae or fungi and cyanobacteria. The symbiotic relationship between algae and fungi is lichen . A lichen is a symbiotic association of an alga and a fungus--mutualism. The prevailing definition of a lichen is that it arises from a symbiosis between a fungus and a photosynthesizing alga or bacteria. Lichens:an obligate symbiotic relationship & mycorrhizae. This species is very common and grows on bark of all kinds of trees in partial shade or sun. Symbiosis. Lichen represents symbiotic relationship. User: Kelp are multicellular photosynthetic protists that make up kelp forests. Weegy: Lichens represent a symbiotic relationship between algae and fungi. 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