Effects of zebra mussels on chlorophyll, nitrogen, phosphorus and silica in north shore waters of Lake Erie effectsofzebramu00ontauoft Year: 1997 76 78 80 82 84 86 88 90 92 94 Year â ; Elgin (spring) o z + 1 04 1 '^^ . r â â '' A . i\ . 1 Pr^ 1^ 0 z 76 78 80 82 84 86 88 90 92 94 Year ^ : Dunnville (spring) â \'\. MZ-V 76 78 80 82 84 86 88 90 92 94 Year 76 78 80 82 84 86 88 90 92 94 Year

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