Impacts of Wastewater Effluent on Temperate Stream Fish Assemblage Structure Author Hoyer, Kelly A., Central Michigan University, Department of Biology, Mount Pleasant, Michigan 48858; ORCID: 0000 - 0001 - 9198 - 5893 hoyer1ka@cmich. edu Author Geheber, Aaron D. University of Central Missouri, Department of Biological and Clinical Sciences, Warrensburg, Missouri 64093; ORCID: 0000 - 0001 - 9599 - 9475 geheber@ucmo.edu. text Ichthyology & Herpetology 2024 2024-06-28 112 2 217 228 http://dx.doi.org/10.1643/i2022089 journal article 10.1643/i2022089 2766-1520 13749214

Table 2. Similarity percentage (SIMPER) showing species contributions (Contrib%) to dissimilarity between East and West Fork sites. West and East Fork average abundance (Av.Abund) columns list the transformed mean abundances for species in both forks, ‘Diss/SD’ represents the ratio between the average dissimilarity and standard deviation, and the cumulative % (Cum.%) column lists the cumulative dissimilarity across species with a 90% cutoff. The average dissimilarity between the East and West Forks was 58.74%.

Species	West Fork Av.Abund	East Fork Av.Abund
			Av.Diss	Diss/SD	Contrib%	Cum.%
Etheostoma spectabile	4.38	2.34	13.7	1.53	23.32	23.32
Etheostoma flabellare	0	2.26	11.97	1.73	20.38	43.7
Chrosomus erythrogaster	1.36	0.24	6.23	0.78	10.61	54.3
Noturus exilis	0.32	1.15	6.16	1.19	10.49	64.79
Cottus bairdii	1.32	1.72	5.97	1.27	10.17	74.96
Campostoma sp.	1.15	0.45	5.62	1.18	9.57	84.54
Luxilus zonatus	0.71	0.2	3.82	0.84	6.51	91.05