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LICHENS Výukový materiál OR 03 - 64 Tvůrce: Mgr. Alena Výborná Tvůrce anglické verze: ThMgr. Ing. Jiří Foller Projekt: S anglickým jazykem do dalších předmětů Registrační číslo: CZ.1.07/1.1.36/03.0005 Tento projekt je spolufinancován ESF a SR ČR
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LICHENS complex composite organisms formed by ▫ heterotropgic fungus– delivers water ▫ autotrophic alga (cyanophytes) – it delivers assimilates symbiosis algae (cyanophytes) from lichens can live independently fungi not (lichenisation of fungi – the most are ascomycetes)
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LICHENS according to the appearance 3 basic types of lichen insole are distinguished: a) corticate: it attaches tightly to the foundation (hardly to separate) map lichen (on the rock surface)
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LICHENS b) foliaceous (leaf-like): overspread in a surface loose edges are irregularly lobulated tube lichen (on branches)
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LICHENS c) fruticose (bush-like): insole is furcate only in one place attached to the ground easy to remove reindeer lichen (poor soil of pine forests)
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LICHENS lichens are persistens organisms widespread in the nature, especially on extreme habitats the age of some arctic lichens is estimated – several thousand years
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LICHENS they occur on various ground: ▫ on rocks, on the tree bark, on the ground, on walls.... together with cyanophytes are held for life pioneers very sensitive to the air pollution
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Revision: 1) What are lichens composed of? ▫ algae (cyanophytes) + fungus 2) How is called the relationship between particular organisms? ▫ Symbiosis 3) When can lichens be found? ▫ On rocks, on the tree bark, on the ground, on walls.... 4) What kind of insole does reindeer lichen have ? ▫ Fruticose insole 5) What kind of insole does map lichen have ? ▫ Foliaceous insole
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Sources: DOBRORUKA, Luděk J. Přírodopis pro 7. ročník základní školy. 1. vyd. Praha: Scientia, 1998, 152 s. ISBN 80-718-3134-4 Obrázky: http://commons.wikimedia.org (osvobozeno od autorských práv)http://commons.wikimedia.org
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