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Number and biomass of prokaryotes in the world
| Environment | No. of prokaryotic cells, × 1028 | Pg of C in prokaryotes* |
|---|---|---|
| Aquatic habitats | 12 | 2.2 |
| Oceanic subsurface | 355 | 303 |
| Soil | 26 | 26 |
| Terrestrial subsurface | 25–250 | 22–215 |
| Total | 415–640 | 353–546 |
Calculated as described in the text.
