Fig. 4.
Benthic macroinvertebrate and fish assemblage responses by study riffle over time. a Benthic macroinvertebrate mean density (no. 0.1 m−2) (F5,70 = 12.64, p < 0.0001). b Fish density (no. 2.25 m−2) (F5,70 = 3.47, p = 0.007). c Benthic macroinvertebrate family richness (F5,70 = 19.45, p < 0.0001). d Fish species richness (F5,70 = 0.52, p = 0.975). Riffle 1 is the reference riffle, riffles 2–6 are upstream (of previous dam), and riffle 7 is downstream of the previous dam. Significant pairwise differences based are indicated by different letters a, b, and c (Tukey’s HSD: p < 0.05). For visual clarity, error bars are not included. However, please see Supplementary Material: Table S1 and Fig. S3 for details on data variability