Table 3 Results of the environmental factors fitted onto the non-metric multidimensional scaling (NMDS) based on the Bray-Curtis dissimilarity index of the species presence/absence matrix as well as the species genetic distance matrix.

Levels	Data points	Factors	R²	NMDS1	NMDS2	P value
Communities	14/31	pH	0.9307	0.36577	0.3708	0.098
		Velocity	0.46271	0.88651	0.6852	0.001*
		Temperature	0.99318	0.11658	0.6973	0.001*
Bungona sp.	39/62	pH	0.96845	0.24923	0.223	0.013*
		Velocity	0.28892	−0.95735	0.6985	0.001*
		Temperature	0.59737	−0.80197	0.3675	0.001*
L. cf. vera	22/91	pH	−0.7019	−0.71228	0.0152	0.859
		Velocity	−0.87667	−0.48109	0.0422	0.659
		Temperature	−0.99639	0.08489	0.9709	0.001*
B. cf. sabahensis	53/84	pH	−0.090731	−0.99588	0.1671	0.006*
		Velocity	0.076389	−0.99708	0.333	0.001*
		Temperature	0.022417	−0.99975	0.4599	0.001*
T.sinuosus	15/62	pH	−0.15686	−0.98762	0.1128	0.437
		Velocity	0.15686	0.98762	0.1128	0.437
		Temperature	−0.15686	−0.98762	0.1128	0.437

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