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    • Challenge Question # 5

    Cecilie Ames (cecilie@fcs.net)
    Wed, 16 Apr 1997 21:54:45 -0700

    My name is Mary Heather, and I'm from Mr. Hiday's Biology class at PUC
    Prep School. Here is my answer:

    Bioaccumulate refers to the way a toxin or other substance builds up in a
    food chain. In the loons' food chain, something such as mercury is found
    in small amounts in fishs' food. If the fish eat a lot then they have a
    higher level of mercury than their food source. In turn, loons eat the
    fish and have an even greater amount of mercury in their bodies. That is
    bioaccumulation.