Fig. 5

Boxplots illustrating the median, 25th and 75th percentiles and outliers for a species richness; b Ephemeroptera, Plecoptera, and Trichoptera richness (EPT) richness; c Hilsenhoff’s Biotic Index (HBI); and d percent model affinity (PMA) in all macroinvertebrate samples collected at seven sampling sites grouped by study month and year