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    • Group of earthworms.
    Rights: Lara Bieleski Published 18 June 2008 Size: 380 KB Referencing Hub media

    Changes in the functioning of the nervous systems of worms are used to measure levels of soil pollution. The numbers of earthworms in the soil can also be used to indicate the health of the soil.

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      Bioindicators

      A bioindicator is a living organism that gives us an idea of the health of an ecosystem. Some organisms are very sensitive to pollution in their environment, so if pollutants are present, the ...

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