Effects of zebra mussels on chlorophyll, nitrogen, phosphorus and silica in north shore waters of Lake Erie effectsofzebramu00ontauoft Year: 1997 ^ : Blenheim 15 § 10 5 a. o o 0 1 o -5 FYeZM \ V? PostZM 1 2 3 4 5 6 7 8 9 10 11 12 Month Blenheim 1 2 3 4 5 6 7 8 9 10 11 12 Month . -«.r : Blenheim sd -; PreZM

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