Effects of zebra mussels on chlorophyll, nitrogen, phosphorus and silica in north shore waters of Lake Erie effectsofzebramu00ontauoft Year: 1997 -100 -50 Percentage Change 0 50 100 150 200 /FRP TKN Ammonium Nttrats Nitrite* Org N/lnoro N NH4/(N03+NO^ Organic N Inorganic N N/P Winter

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