. Effects of zebra mussels on chlorophyll, nitrogen, phosphorus and silica in north shore waters of Lake Erie . o 76 78 80 82 84 86 88 90 92 94 Year Elgin (summer) > I *" 0 J\h +95% -Pred. -95% 76 78 80 82 84 86 88 90 92 94 Year ' Rosehill 1 (summer) ,, ^ "^ 'â â ⢠-^ o >^ 0 VI -M II f 76 78 80 82 84 86 88 90 92 94 Year Figure 18. ARIMA forecasts of fall silica and summer total phosphorus concentrations for the post zebra mussel period at the five Lake Erie sampling locations. Measured data points lying outside the +95%
. Effects of zebra mussels on chlorophyll, nitrogen, phosphorus and silica in north shore waters of Lake Erie . o 76 78 80 82 84 86 88 90 92 94 Year Elgin (summer) > I *" 0 J\h +95% -Pred. -95% 76 78 80 82 84 86 88 90 92 94 Year ' Rosehill 1 (summer) ,, ^ "^ 'â â ⢠-^ o >^ 0 VI -M II f 76 78 80 82 84 86 88 90 92 94 Year Figure 18. ARIMA forecasts of fall silica and summer total phosphorus concentrations for the post zebra mussel period at the five Lake Erie sampling locations. Measured data points lying outside the +95% confidence envelope of a forecast imply a significant deviation from those expected on the basis of the pre-zebra mussel data. 21
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