Fig. 3From: Water quality impacts of small-scale hydromodification in an urban stream in Connecticut, USADissolved oxygen (a), nitrate concentration (b), and total phosphorus concentration (c) at the four sampling sites in the North Branch Park River. Bars indicate the mean ± 1 SE. The (a, b) markings above the columns indicate the groups identified with the Tukey test (α = 0.05)Back to article page