TABLE 3.

ANOSIM of the nifH, nirK, and nirS OTU from the three sites following application of a 1% threshold^a

Gene and station comparison	R statistic of 1% threshold data based on:
	Presence/absence	Relative abundance
nifH
Station 1 vs 2	0.15	0.41
Station 1 vs 3	0.91	1.0
Station 2 vs 3	0.85	1.0
Global R	0.62	0.80
nirK
Station 1 vs 2	−0.333	−0.259
Station 1 vs 3	0.204	0.333
Station 2 vs 3	0.056	0.037
Global R	−0.012	0.012
nirS
Station 1 vs 2	0.07	0.33
Station 1 vs 3	0.44	0.52
Station 2 vs 3	0.02	0.33
Global R	0.18	0.42

^aSimilarity was calculated based on presence/absence and relative abundance. P < 0.01 in all cases for the pairwise comparisons.