Lichens are symbiotic communities of vastly different organisms that have evolved intimately together for billions of years. The fungus provides shelter, water and nutrients. The algae (or sometimes cyanobacteria) provides energy in the form of sugar from photosynthesis. Just recently scientists discovered that most lichens have a third organism – a yeast – also living in symbiosis. Many of the 20,000 known species of lichen are miniature self-contained ecosystems.   – Peter Worthington

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  • Faith Shields
    Posted at 17:49h, 07 June Reply

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    • Admin
      Posted at 09:01h, 06 July Reply

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  • homepage
    Posted at 20:01h, 22 July Reply

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  • borvestinkral
    Posted at 10:49h, 22 August Reply

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