Table 3.
Abundance of 16S rRNA, nifH, nifD, and mcrA genes in sediments of the 12 sampling stations of the northern South China Sea
| Sampling station | Mean no. of target genes g of sediment−1 (SE) |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Bacterial 16S rRNA | Archaeal 16S rRNA | Total nifH | ANME nifH | ANME nifD | Total mcrA | Subgroup a-b mcrA | Subgroup c-d mcrA | Subgroup e mcrA | Subgroup f mcrA | |
| A3 | 1.52 × 1011 (3.84 × 1010) | 5.47 × 109 (4.29 × 108) | 2.63 × 107 (1.25 × 106) | NDa | ND | 6.80 × 105 4.18 × 104 | ND | ND | 4.45 × 104 (2.91 × 102) | 2.36 × 103 (1.61 × 102) |
| CF6 | 2.68 × 1010 (3.57 × 109) | 2.42 × 109 (8.43 × 107) | 2.04 × 106 (1.76 × 103) | 1.07 × 103 (2.69 × 10) | 1.42 × 103 (6.45 × 10) | 4.58 × 105 1.02 × 104 | 1.69 × 103 (1.19 × 102) | 1.62 × 103 (3.02 × 10) | ND | 1.86 × 103 (1.79 × 102) |
| CF8 | 2.82 × 1010 (1.37 × 109) | 1.65 × 109 (1.59 × 108) | 8.50 × 105 (7.19 × 104) | ND | ND | 2.75 × 105 6.92 × 103 | 2.56 × 10 (2.22) | ND | ND | 4.81 × 102 (1.64 × 10) |
| CF11 | 6.17 × 1010 (1.51 × 1010) | 1.20 × 109 (8.42 × 107) | 1.60 × 106 (5.46 × 104) | 3.31 × 103 (1.15 × 102) | 3.59 × 103 (5.79 × 10) | 3.05 × 105 1.71 × 104 | 1.26 × 102 (5.91) | 4.27 × 103 (3.98 × 102) | 2.55 × 103 (2.09 × 102) | 3.53 × 102 (1.91 × 10) |
| CF14 | 4.93 × 1010 (2.30 × 109) | 1.16 × 109 (3.07 × 107) | 3.17 × 106 (2.64 × 105) | 4.59 × 103 (2.24 × 102) | 3.89 × 103 (6.06 × 10) | 5.78 × 105 4.44 × 104 | 2.40 × 102 (2.26 × 10) | 3.87 × 103 (2.75 × 10) | 1.37 × 103 (7.81) | 6.62 × 102 (5.66 × 10) |
| CF15 | 1.30 × 1011 (5.59 × 109) | 4.95 × 109 (2.67 × 107) | 1.35 × 106 (1.22 × 105) | 8.16 × 103 (4.65 × 102) | 5.84 × 103 (1.69 × 102) | 3.30 × 105 1.90 × 104 | 4.39 × 102 (1.59 × 10) | 5.58 × 103 (1.39 × 102) | 3.23 × 103 (1.89 × 10) | 1.79 × 103 (1.63 × 102) |
| E407 | 2.80 × 1010 (2.49 × 109) | 1.51 × 109 (4.53 × 107) | 9.83 × 105 (3.58 × 104) | 5.94 × 102 (3.97 × 10) | 3.24 × 102 (3.03 × 10) | 5.12 × 105 5.81 × 103 | 3.87 × 102 (1.10 × 10) | 3.67 × 102 (9.45) | 2.32 × 103 (2.99 × 10) | 3.36 × 103 (3.71 × 10) |
| E422 | 3.05 × 1010 (2.31 × 109) | 1.05 × 109 (7.62 × 107) | 1.64 × 106 (2.95 × 104) | 3.88 × 102 (3.29 × 10) | 1.55 × 103 (6.88 × 10) | 3.50 × 105 2.52 × 104 | 7.84 × 102 (6.82 × 10) | 4.97 × 102 (2.18 × 10) | 2.09 × 103 (1.58 × 102) | 4.47 × 102 (3.95 × 10) |
| E501 | 9.39 × 1010 (1.01 × 1010) | 6.03 × 109 (4.42 × 108) | 5.65 × 107 (3.79 × 106) | ND | ND | 9.57 × 105 4.62 × 104 | ND | ND | 4.78 × 103 (1.36 × 102) | ND |
| E504 | 1.44 × 1011 (5.15 × 1010) | 1.73 × 1010 (9.52 × 108) | 1.20 × 107 (1.09 × 106) | ND | ND | 1.83 × 106 9.04 × 104 | 1.12 × 102 (6.24) | ND | 3.97 × 103 (3.89 × 102) | ND |
| E505 | 6.07 × 1010 (5.33 × 109) | 5.48 × 109 (2.34 × 108) | 4.34 × 106 (3.40 × 104) | ND | ND | 1.61 × 106 3.67 × 104 | 1.43 × 102 (1.06 × 10) | ND | 3.48 × 103 (9.64 × 10) | ND |
| E801 | 3.13 × 1010 (2.19 × 109) | 1.32 × 109 (2.34 × 107) | 3.18 × 106 (3.97 × 104) | ND | ND | 7.41 × 105 5.33 × 104 | ND | ND | ND | ND |
a
ND, not detectable.