Table 4.
Calculated Trichodesmium N2 fixation rate in the South China Sea and the Kuroshio with literature reports of estimated N2 fixation in the adjacent area.
| Location | N2 fixation rate (μmolNm−3d−1) | Method | Primary production (mgCm−2d−1) | Nitrate-uptake-based new production | Reference |
|---|---|---|---|---|---|
| Southeastern ECS | 126 | ARA | 70 | ||
| Kuroshio | 55 | 70,71 | |||
| ECS (Trichodesmium erythraeum) | 279 | ARA | 71 | ||
| ECS (Trichodesmium thiebautii) | 685 | ||||
| Kuroshio winter | 2.4 | 15N2 gas bubble | 530 | 270 | 4 |
| Kuroshio spring | 34.7 | 540 | 140 | ||
| Kuroshio summer | 168.1 | 510 | 160 | ||
| SCS winter | 1.2 | 620 | 230 | ||
| SCS spring | 7.3 | 500 | 210 | ||
| SCS summer | 12.6 | 360 | 80 | ||
| SCS autumn | 5.0 | 540 | 250 | ||
| ECS Kuroshio | 1.29 | ARA | 400.3 | This study | |
| Luzon Strait | 7.01 | 381.7 | |||
| SCS basin | 0.0031 | 445.1 | |||
| SCS shelf | 0.012 | 242.7 |
ARA = acetylene reduction assay.