Effects of zebra mussels on chlorophyll, nitrogen, phosphorus and silica in north shore waters of Lake Erie effectsofzebramu00ontauoft Year: 1997 1 2 3 4 5 6 7 8 9 10 11 12 Month Rosehill 1 2 3 4 5 6 7 8 9 10 11 12 Month r Rosehil ^ '\1 \ PostZM [ a E, ^ LL n . tl^ll PreZM 30 ^ 20 u. ^ 10 t- 0 5 z : « I 0- O - 6 z •T - X z 0 1 2 3 4 5 6 7 8 9 10 11 12 Month Rosehill

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