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    Rights: University of Waikato
    Published 17 September 2009 Referencing Hub media
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    DR CANDIDA SAVAGE
    There is a lot that's living both out in the water but also in the sediments that we don't see with our bare eyes, and what we realise is that these microorganisms are a crucial component of a food web, so by that I mean the bacteria and the small microscopic organisms that we can't see, and they are performing a vital role in terms of cycling of nutrients and also just maintaining a healthy ecosystem.