Table 5.
Mean (±SE) organic carbon (Corg) stocks in 1 m-thick soils, and long-term (millennia) soil accretion rates and soil Corg sequestration rates based on 14C from four different locations in the Central Red Sea.
| Location | n cores | Corg Stock-in 1 m thick soil | 14C soil accretion rate | Carbon Sequestration using 14C |
|---|---|---|---|---|
| g Corg m-2 | mm yr-1 | g Corg m-2 yr-1 | ||
| Thuwal Island | 8 | 3034 ± 416b | 1.8 ± 1a | 5.5 ± 3.4a |
| Economic City | 8 | 3838 ± 291b | 0.4 ± 0.1a | 1.6 ± 0.2a |
| Petro Rabigh | 6 | 2471 ± 470b | 0.6 ± 0.1a | 1.5 ± 0.4a |
| Khor Alkharar | 7 | 7618 ± 1530a | 0.6 ± 0.2a | 5 ± 2.8a |
| R 2 | 0.5 | 0.1 | 0.1 | |
| F ratio | 7.8** | 1.2 ns | 0.8 ns | |
| All | 29 | 4246 ± 533 | 0.9 ± 0.3 | 3.5 ± 1.1 |
R 2 and F ratio correspond to an ANOVA testing for significant differences between locations. *P value between 0.01 and 0.05, **P value < 0.01 for significant differences between depths, whereas (ns) means not significant. Columns linked with the same letter did not differ significantly among themselves (Tukey HSD multiple comparison post-hoc test, P > 0.05).