Identification of Fine-Scale Marine Benthic Ecoclines by Multiple Parallel Ordination

Table 3

Procrustes correlation coefficients (𝑟) between parallel DCA and GNMDS ordinations, Kendall’s tau correlations (𝜏₁ and 𝜏₂) between corresponding axes for each abundance range (𝑅₁--𝑅_max), and percent stress for GNMDS ordinations. The abundance ranges indicated by bold-face numbers represent no (𝑅₁), intermediate (𝑅₃₂), and a strong (𝑅_max = 571) weight given to abundance (see Section 2.6 for explanation of selection criteria).

Range	𝑅	𝜏1	𝜏2	Stress
𝑅1 (qual)	0.779	0.831	0.243	20.3
𝑅2	0.821	0.905	0.249	19.1
𝑅4	0.838	0.889	0.296	17.6
𝑅8	0.844	0.852	0.291	15.7
𝑅16	0.865	0.862	0.339	14.4
𝑅32	0.883	0.873	0.418	13.6
𝑅64	0.904	0.873	0.481	13.2
𝑅128	0.932	0.889	0.481	13.4
𝑅256	0.935	0.894	0.481	13.4
𝑅max (raw)	0.923	0.915	0.423	12.9