What is the definition of a pioneer species? What are some examples?
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Pioneer species are hardy species which are the first to colonize previously disrupted or damaged ecosystems, beginning a chain of ecological succession that ultimately leads to a more biodiverse steady-state ecosystem. For example:

    Barren sand - Lyme grass, Sea couch grass, Marram grass
    Salt water - green algae, Marine eel grass, Pickleweed, and Cordgrass
    Clear water - algae, mosses, Freshwater eel grass
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I dunno u tell me that's why im here

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The pioneer species is the species that regrow in an area that once housed an ecosystem. After it was damaged or destroyed, this organism was the first organism to survive there again
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