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I , <br />E <br />11 <br />March, 1994 <br />m 200 <br />0 <br />150 <br />�o I <br />100 <br />I I <br />° 50 <br />CL -50 2 <br />1 E <br />E <br />- 600 -400 -200 -100 -10 10 100 200 400 600 0 <br />(Upstream) Distance From Discharge (Downstream) o <br />> 300 <br />O <br />-6 250 <br />c <br />in 200 <br />+ 150 <br />0 <br />is 100 <br />U 50 <br />a <br />w 0 <br />October, 1994 <br />r <br />I <br />r <br />rt <br />g <br />2-x <br />x <br />N <br />E <br />1 <br />- 600 -400 -200 -100 -10 10 100 200 400 600 0 M <br />(Upstream) Distance From Discharge (Downstream) o <br />Figure 3. Spring and fall plots of EPT /C ratios with standard deviations (upper part of each <br />plot), and bars showing total numbers per square meter for Ephemeroptera, Plecoptera, <br />Trichoptera, and Chironimidae combined. <br />