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Pinckney, MI
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Title
Grape Vine And Lichen
Artist
Gerald Strine
Medium
Photograph - Photograph
Description
Lichens (/ˈlaɪkəns/,[1] sometimes /ˈlɪtʃəns/)[2] are composite organisms consisting of a fungus (the mycobiont) and a photosynthetic partner (the photobiont or phycobiont) growing together in a symbiotic relationship. The photobiont is usually either a green alga (commonly Trebouxia) or cyanobacterium (commonly Nostoc).[3] The morphology, physiology and biochemistry of lichens are very different from those of the isolated fungus and alga in culture. Lichens occur in some of the most extreme environments on Earth—arctic tundra, hot deserts, rocky coasts, and toxic slag heaps. However, they are also abundant as epiphytes on leaves and branches in rain forests and temperate woodland, on bare rock, including walls and gravestones, and on exposed soil surfaces (e.g., Collema) in otherwise mesic habitats. The roofs of many buildings have lichens growing on them. Lichens are widespread and may be long-lived;[4] however, many are also vulnerable to environmental disturbance, and may be useful to scientists in assessing the effects of air pollution,[5][6][7] ozone depletion, and metal contamination. Lichens have also been used in making dyes and perfumes, as well as in traditional medicines.
Uploaded
June 9th, 2013
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Viewed 197 Times - Last Visitor from New York, NY on 04/01/2024 at 12:31 AM
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