Table 1.
Heterotrophic substrate incorporation, turnover times, and growth rates determined from incubations with radiolabeled thymidine (TdR) and leucine (Leu).
| Community incorporation (pmol TdR or Leu L−1 h−1) | Community incorporation (nmol C L−1 d−1) | Growth Rate (d−1)x 10−3 | Doubling Time (days) | Cellular C Turnover Time (days) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| TdR | Leu | TdR | Leu | TdR | Leu | TdR | Leu | TdR | Leu | |
| Cast 1 | 0.01 | 0.08 | 0.61 | 0.25 | 5.0 | 2.0 | 138 | 338 | 209 | 511 |
| Cast 2 | 0.04 | 0.12 | 1.7 | 0.38 | 1.4 | 3.0 | 50 | 224 | 61 | 339 |
| Cast 3 | 0.03 | 0.08 | 1.1 | 0.24 | 9.0 | 2.0 | 76 | 350 | 116 | 537 |
| Average (SD) | 0.03 (0.01) | 0.09 (0.02) | 1.1 (0.5) | 0.29 (0.08) | 9.0 (5.0) | 2.0 (1.0) | 88 (46) | 304 (70) | 129 (75) | 462 (108) |