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  Lichen grows on rocks in a barren area.
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  Lichen eats rock and creates a gap where soil can gather. Lichen is a pioneer species.
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  Small plants and shrubbery grow in the soil created by the rocks and lichen.
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  foliage starts to grow in the increasingly fertile soil.
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  Small trees start growing among the other plants.
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  Large trees grow and has completed the Climax Community.
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  Climax Community is Struck by Lightning and nearly all burned down.
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  Out of the ashes, new trees start growing.
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  Small tres and shrubbery start regrowing.
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  Forest has completely regrown.
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  Eutrophication is pretty much the excess growth of an environment, mainly lakes. Natural Eutrophication is where a lake naturally becomes more productive, which can take hundreds of years. Artificial Eutrophication however, speeds up this process immensely because of all the fertilizer from human activities.Too much can be a problem as Eutrophication reduces dissolved oxygon in the water and can cause organisms to die.
