Eutrophic Zone- Alot of nutrients and so supporting a dense plant population but it doesn't support animal life.
http://www.scienceclarified.com/El-Ex/Eutrophication.html
http://www.learntravelart.com/2014/03/oligotrophic-vs-eutrophic.html
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Oligotrophic Zone- This zone is where a animal can live but there is no plant life because there is not nutrients.
http://delaneynfreshwater.blogspot.com/2013/04/oligotrophic-mesotrophic-and-eutrophic.html
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