Coupled fish-hydrogeomorphic responses to urbanization in streams of Columbus, Ohio, USA.

At the assemblage level, we observed a negative relationship between D 50 (median sediment particle size) and % tolerant individuals as well as a positive trend between incision ratio and % generalists over study years.

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“Bed Characteristics + Year” was best supported for Δ % Generalists (ΔAICc = 0.00), displaying a negative trend with D 50 . Δ % Herbivores was best modeled by “Year-only” (ΔAICc = 0.00), although the “Hydrologic Variability + Year” model was also supported (ΔAICc = 0.80). Δ % Tolerant was best modeled by the “Bed Characteristics + Year + Riparian Canopy” model (ΔAICc = 0.00), with a significant negative relationship with riparian canopy cover and a negative trend with D 50 , while the “Riparian Canopy + Year” model was also supported and showed the same negative relationship with riparian canopy cover (ΔAICc = 1.28, Table 4 ).

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