. Effects of zebra mussels on chlorophyll, nitrogen, phosphorus and silica in north shore waters of Lake Erie . 50 40 ^ 30^ E 20 ^ 10 0 -10 1 2 3 4 5 6 7 8 9 10 11 12 Month Elgin PreZM PostZM - . V 5" - z e. - 0 1 1 2 3 4 5 6 7 8 9 10 11 12 Month

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Keywords: ., bookcentury1900, bookcollectiongovernmentpubli, bookleafnumber22