Table 2. The effect of GX addition on pre-filtered (5-μm) surface water collected in June 2014 and incubated under the dark and DCMU conditions for two days.
| Parameter | Units | Initial filtered (T0) | Control-no addition (T48) | GX addition (T48) | GX: Control (ratio) |
|---|---|---|---|---|---|
| Bacterial abundance | Cell × 108 L−1 | 3.14 | 3.78 ± 0.57 | 6.58 ± 0.42 | 1.8 ± 0.3 |
| Bacterial respiration | μg C L−1 d−1 | N.A. | 211 ± 26 | 304 ± 19 | 1.5 ± 0.2 |
| Bacterial production | μg C L−1 d−1 | 0.48 ± 0.08 | 1.09 ± 0.06 | 1.94 ± 0.10 | 1.8 ± 0.2 |
| TEP | μg GX L−1 | 19 | 45 ± 20 | 103 ± 24 | 2.9 ± 1.7 |
| Chl.a | μg L−1 | 0.14 | 0.03 ± 0.01 | 0.02 ± 0.02 | 0.8 ± 1.0 |
| Primary production | μg C L−1 d−1 | 0.89 | 0.08 ± 0.02 | 0.04 ± 0.01 | 0.5 ± 0.2 |
Values are the averages and their standard deviations from three replicates and their corresponding GX: Control ratio. N.A. means the data are not available. Significance was tested by one-way ANOVA and a Fisher LSD means comparison test, P < 0.05.