Table 3.

The abundance of the nifH and bacterial 16S rRNA genes in the sediments of the Bohai Sea.

Sampling station	Mean copy no. of target genes g−1 sediment (SE)
	nifH	Bacterial 16S rRNA*
B1	7.21 × 107 (2.70 × 106)	1.99 × 1010 (1.30 × 109)
B3	2.95 × 107 (2.65 × 106)	5.04 × 109 (2.09 × 108)
B5	5.99 × 107 (5.75 × 106)	5.17 × 109 (1.71 × 108)
B7	1.45 × 108 (3.07 × 106)	8.00 × 109 (6.19 × 108)
B8	1.22 × 108 (9.57 × 106)	1.86 × 1010 (1.60 × 109)
B10	2.77 × 108 (1.01 × 107)	1.45 × 1010 (1.33 × 109)
B11	7.42 × 108 (4.26 × 107)	1.66 × 1010 (5.43 × 108)
B12	8.70 × 108 (7.46 × 107)	1.33 × 1010 (2.82 × 108)
B14	9.28 × 108 (5.40 × 107)	1.16 × 1010 (1.16 × 109)
B15	4.34 × 108 (3.88 × 107)	1.06 × 1010 (8.64 × 108)
B16	2.42 × 108 (1.90 × 107)	3.25 × 109 (4.08 × 108)
B19	2.63 × 109 (2.22 × 108)	1.76 × 1010 (7.52 × 108)
B20	9.45 × 108 (3.87 × 107)	2.10 × 1010 (6.29 × 108)
B22	5.54 × 108 (4.14 × 107)	1.83 × 1010 (6.02 × 108)

^*The bacterial 16S rRNA gene abundance data were obtained from a previous study (Dang et al., 2013b).