Table 2 Soil properties of the Ardley Island temporal gradient
Plot/Est. age [BP] | Horizon | Horizon Depth [cm] | Texture | Skeleton [%] | Color (moist) | pH | C org [%] | C/N | δ13C [‰] | Classification |
|---|---|---|---|---|---|---|---|---|---|---|
P1/650-200 | O | 1–0 |  | - |  |  | 30.0 | 20.1 | −24.22 | Eutric |
AC1 | 0–5 | S | 62 | 10 YR 1.7/1 | 5.24 | 1.16 | 10.6 | −23.25 | Arenosol | |
AC2 | 5–15 | S | 68 | 10 YR 2/2 |  | 6.2 | 15.0 | −23.31 |  | |
2C | > 15 |  |  |  |  |  |  |  |  | |
P2/1400-650 | O | 1–0 |  | - |  | 3.98 | 22.7 | 13.0 | −24.44 | Dystric |
AC1 | 0–5 | S | 94 | 10 YR 1.7/1 | 4.58 | 10.9 | 13.4 | −23.50 | Arenosol | |
AC2 | 5–15 | S | 93 | 10 YR 2/2 | 4.98 | 5.33 | 13.1 | −23.41 |  | |
C | > 15 |  | 84 |  | 5.29 | 1.49 | 12.5 | −23.16 |  | |
P3/2200-1000 | O | 1–0 |  | - |  |  | 28.3 | 16.5 | −24.47 | Dystric |
AC1 | 0–5 | LS | 56 | 10 YR 1.7/1 | 4.49 | 13.8 | 17.1 | −23.88 | Arenosol | |
AC2 | 5–15 | LS | 70 | 10 YR 2/2 | 4.82 | 9.14 | 13.0 | −23.80 |  | |
C | > 15 |  |  |  | 5.03 | 0.99 | 7.7 | −24.14 |  | |
P4/4400-2300 | O | 1–0 |  | - |  |  | 20.2 | 12.3 | −25.01 | Dystric |
AC | 0–5 | LS | 80 | 10 YR 1.7/1 | 4.63 | 6.93 | 12.9 | −24.07 | Arenosol | |
2 AC | 5–10 | LS | 54 | 10 YR 2/2 | 4.81 | 6.67 | 12.1 | −23.78 |  | |
3 AC | 10–15 | LS | 91 | 10 YR 2/3 | 5.13 | 4.31 | 11.1 | −23.58 |  | |
P5/5000 | O | 1–0 |  | - |  |  | 18.5 | 13.2 | −24.62 | Dystric |
AC | 0–7 | LS | 94 | 10 YR 2/2 | 4.56 | 8.70 | 12.9 | −24.20 | Arenosol | |
2 AC | 7–12 | LS | 71 | 10 YR 2/2 | 4.75 | 7.44 | 11.9 | −23.73 |  | |
3 AC | 12–17 | LS | 98 | 10 YR 3/2 |  | 5.12 | 10.1 | −23.31 |  | |
P6/7200 | O | < 1 |  | - | 10 YR 2/2 |  | 36.8 | 16.2 | −24.90 | Dystric |
OC | 0–5 | Sil | 30 | 10 YR 1.7/2 | 4.38 | 14.6 | 12.6 | −24.61 | Arenosol | |
2OC | 5–13 | LS | 88 | 7.5 YR 1.7/1 | 4.38 | 19.1 | 13.1 | −24.67 |  | |
2 AC | 13–20 | LS | 87 | 10 YR 2/2 |  | 12.5 | 12.8 | −24.49 |  |