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Lower, single or multicellular plant organisms, which as plankton can become microscopically small or, as a seaweed, up to 50 meters long. They are the oldest group of plants on earth and inhabit almost all wet areas of life with more than 50,000 species. Some forms live as lichens in symbiosis with mushrooms or as corals in marine polyps. Algae and lichens are involved in weathering and soil formation processes such as in the transformation of humus involved. They play a role mainly in chemical weathering, in which the released vegetable acids contribute to the slow dissolution of basic rocks, such as limestones. As part of Paleozoic marine sediments, algae formed the biogenic basis of sedimentary rocks, such as diatoms for the diatomaceous, If necessary, algae are used in viticulture pesticides (Algicides) used. See also below soil type. geology and Weingarten Care,
Image: By Luis Fernández García , CC By -SA 2.1 es , link
Wetterkreuz 19, 91058 Erlangen, Germany