Table 1. Analysis of Similarities (ANOSIM) to detect possible differences in nematode community structure among the four environmental factors.

Factors	R	p	Pair-wise test
Atoll		n.s.	–
Exposure	0.24	<0.001	–
Slope	0.15	<0.01	<10° vs. 10°–50° (R = 0.18; p < 0.01); <10° vs. >50° (R = 0.20; p < 0.01); >50° vs. 10°–50°(n.s.)
Depth	0.23	<0.001	25–50 m vs. >50 m (R = 0.44; p < 0.001); <25 m vs. >50 m (R = 0.25; p < 0.04); 25–50 m vs. <25 m (R = 0.13; p < 0.05)

Note:

n.s., not significant differences; R, ratio that compares the mean of ranked dissimilarities between groups to the mean of ranked dissimilarities within groups; p, probability level.