TABLE 1.

Spearman's correlations (R values) between transformed environmental variables and taxonomic (Bray-Curtis distance) and phylogenetic (UniFrac distance) community compositions as determined via partial Mantel tests

Factor	Taxonomic composition		Phylogenetic composition
	R	P	R	P
pH	0.725	0.001a	0.789	0.001a
TOC (mg · liter−1)	0.340	0.010b	0.328	0.016b
TFe (mg · liter−1)	−0.020	0.563	−0.059	0.736
Area (km2)	−0.164	0.926	−0.197	0.967
NOx− (mg · liter−1)	0.223	0.076	0.187	0.077
TP (mg · liter−1)	−0.115	0.783	−0.111	0.811
Conductivity (μS · cm−1)	−0.114	0.862	−0.068	0.733
TN (mg · liter−1)	−0.168	0.967	−0.164	0.960

^aP < 0.01.

^bP < 0.05.