Variable | IS1 | IS2 | IS3 | BS1 | BS2 | BS3 | BS4 |
---|---|---|---|---|---|---|---|
OC (%) | 0.76–1.93 (0.93 ± 0.15) | 0.76–5.22 (6.72 ± 1.14) | 0.81–1.3 (0.92 ± 0.1) | 1.12–2.41 (1.5 ± 0.26) | 0.92–1.34 (1.13 ± 0.09) | 0.92–1.56 (1.10 ± 0.12) | 1.13–1.73 (1.27 ± 0.12) |
TN (%) | 0.057–0.15 (0.068 ± 0.012) | 0.062–0.11 (0.074 ± 0.009) | 0.043–0.092 (0.065 ± 0.011) | 0.1–0.105 (0.082 ± 0.01) | 0.045–0.066 (0.052 ± 0.004) | 0.056–0.073 (0.065 ± 0.004) | 0.05–0.08 (0.06 ± 0.006) |
OC/TN ratio | 11.43–16.19 (13.52 ± 1.20) | 10.56–48 (14 ± 5.98) | 11.48–19.41 (14 ± 1.74) | 15.57–27 (18 ± 1.99) | 16.16–25.58 (22 ± 1.83) | 14.67–21.48 (17 ± 1.25) | 18.58–30.56 (21 ± 2.31) |
δ13C (‰) | −21.55 to −14.76 (−18.88 ± 0.97) | −26.8 to −16.26 (−19.64 ± 2.38) | −21.56 to −10.96 (−16.41 ± 2.14) | −23.54 to −16.4 (−19.42 ± 1.76) | −17.44 to −13.77 (−15.28 ± 0.88) | −18.32 to −15.1 (−16.73 ± 0.73) | −19.79 to −13.14 (−15.49 ± 1.27) |
δ15N (‰) | 0.09–12.24 (3.88 ± 0.76) | 3.06–5.16 (4.09 ± 0.45) | 3.28–5.6 (4.48 ± 0.56) | 0.05–17.55 (0.016 ± 0.0017) | 1.61–11.76 (5.02 ± 1.81) | 2.35–4.14 (3.31 ± 0.33) | 1.61–4.13 (2.99 ± 0.4) |