approached significanceP = 0.051
Mean fucoxanthin concentrations (a biomass marker for diatoms) ranged from 0.02 to 1.48 μg/mg AFDM in periphyton ( Figure S8 ), with significantly higher concentrations in Stream 1 compared to the REF stream (Tukey’s test, P < 0.05), and a difference that approached significance in Stream 2 (Tukey’s test, P = 0.051).