Table 2 Average element accumulation rates (EARs) of the Red Sea sediment cores.
From: Declining nutrient availability and metal pollution in the Red Sea
Element | South Red Sea sediment core (N = 19) | North Red Sea sediment core (N = 24) | ||||
|---|---|---|---|---|---|---|
Year < 1870 | Year > 1870 | EAR changes | Year < 1870 | Year > 1870 | EAR changes | |
Ca | 205 ± 24.4 (a) | 168 ± 34.4 (b) | −17.8% | 1526 ± 128 (A) | 1652 ± 282 (A) | 8.29% |
Si | 144 ± 24.6 (a) | 145 ± 32.1 (a) | 0.85% | 473 ± 51.5 (A) | 531 ± 110 (A) | 12.4% |
Mg | 19.3 ± 2.37 (a) | 17.6 ± 3.41 (a) | −8.52% | 114 ± 9.42 (A) | 127 ± 26.2 (A) | 12.0% |
Na | 29.9 ± 2.94 (a) | 30.8 ± 4.72 (a) | 2.94% | 64.1 ± 6.72 (B) | 80.4 ± 25.3 (A) | 25.4% |
Fe | 19.3 ± 3.38 (a) | 18.9 ± 4.21 (a) | −1.82% | 73.3 ± 9.77 (A) | 76.6 ± 16.6 (A) | 4.56% |
TOC | 45.3 ± 5.49 (a) | 38.6 ± 8.55 (a) | −14.9% | 21.4 ± 2.16 (A) | 27.8 ± 16.9 (A) | 30.1% |
S | 7.17 ± 0.82 (a) | 5.93 ± 0.98 (b) | −17.2% | 28.0 ± 2.37 (A) | 31.8 ± 6.02 (A) | 13.4% |
TN | 6.27 ± 0.77 (a) | 5.40 ± 1.24 (a) | −14.0% | 4.27 ± 0.43 (A) | 4.30 ± 0.77 (A) | 0.85% |
P | 1.97 ± 0.22 (a) | 1.65 ± 0.33 (b) | −16.4% | 5.72 ± 0.55 (A) | 6.25 ± 1.31 (A) | 9.29% |
Zn | 0.080 ± 0.011 (a) | 0.077 ± 0.016 (a) | −3.76% | 0.33 ± 0.035 (A) | 0.38 ± 0.081 (A) | 13.8% |
V | 0.16 ± 0.035 (a) | 0.12 ± 0.039 (b) | −25.8% | 0.17 ± 0.021 (A) | 0.20 ± 0.042 (A) | 12.6% |
Ni | 0.058 ± 0.0064 (a) | 0.052 ± 0.011 (a) | −10.30% | 0.14 ± 0.019 (B) | 0.17 ± 0.034 (A) | 19.5% |
Cr | 0.054 ± 0.0073 (a) | 0.049 ± 0.011 (a) | −9.24% | 0.12 ± 0.013 (B) | 0.14 ± 0.030 (A) | 17.6% |
Cu | 0.033 ± 0.0046 (a) | 0.031 ± 0.0069 (a) | −6.85% | 0.10 ± 0.014 (A) | 0.12 ± 0.029 (A) | 14.4% |
Cd | 0.0033 ± 0.00072 (a) | 0.0025 ± 0.00067 (b) | −23.0% | 0.0056 ± 0.00057 (A) | 0.0061 ± 0.0013 (A) | 8.69% |
