Figure 7.4 Sample streamscapes at two different proportions of obstacles and with two different obstacle size distributions. (a) 5% obstacles; size (mean ± SD) 2 ± 1 cells; (b) 15% obstacles, size 2 ± 1 cells; (c) 5% obstacles, size 6 ± 1 cells; (d) 15% obstacles, size 6 ± 1 cells