Table 1. Summary statistics for NMMDS analyses.

		Stress value			r2
Distance measure	Tips-randomized trees included?	Iteration #1	Iteration #2	Iteration #3	Iteration #1	Iteration #2	Iteration #3
RF-dist., unscaled	Yes	0.27	0.27	0.27	0.75	0.75	0.75
RF-dist., unscaled	No	0.24	0.24	0.24	0.83	0.83	0.83
Symmetric distance	Yes	0.36	0.36	0.36	0.50	0.50	0.50
Symmetric distance	No	0.35	0.34	0.34	0.55	0.56	0.56
RF-dist., rescaled	Yes	0.35	0.35	0.35	0.54	0.54	0.54
RF-dist., rescaled	No	0.34	0.34	0.34	0.60	0.60	0.59