Table 4.
Mean (±SE) organic carbon (Corg) stocks in 10 cm-thick soils, and short-term (since 1900) soil accretion rates and soil Corg sequestration rates based on 210Pb from four different locations in the Central Red Sea.
| Location | n cores | Corg Stock-in 10 cm thick soil | 210Pb soil accretion rate | Carbon sequestration using 210Pb (normalized to 1900) |
|---|---|---|---|---|
| g Corg m−2 | mm yr−1 | g Corg m−2 yr−1 | ||
| Thuwal Island | 8 | 530 ± 146b | 2.1 ± 0.7 | 10 ± 3c |
| Economic City | 8 | 531 ± 58b | 2.2 ± 0.7* | 16 ± 6b |
| Petro Rabigh | 6 | 382 ± 153b | 2.4 ± 1.0 | 9 ± 4d |
| Khor Alkharar | 7 | 1541 ± 430a | 0.7 ± 0.1 to 3.7 ± 0.7 | 23 ± 1a |
| R 2 | 0.4 | 0.1 | 0.9 | |
| F ratio | 5** | 0.8 ns | 10030** | |
| All | 29 | 744 ± 140 | 2.2 ± 0.7 | 15 ± 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).
*Here refers to the mean sediment accretion rate of the locations where 210Pb could be used to establish a geochronology.