TABLE 6.

Fixation indices, average pairwise differences, nucleotide diversity, and unique sequences of nirK clone libraries as calculated by Arlequin^a

Site	FST	Avg pairwise difference (θ[π])	Nucleotide diversityb	No. of unique OTU
R89	0.030	89 (44)	0.25 (0.12)*	23
R97	0.033	83 (37)	0.24 (0.11)*	21
R00	0.042	66 (29)	0.19 (0.01)†	28
R01	0.043	64 (27)	0.18 (0.01)†	17
R03	0.045	62 (28)	0.17 (0.09)†	18

^aSee reference 8.

^bValues sharing the same symbol are not statistically different, based on pairwise Student's t test (P ≤ 0.05).