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Table 1 Concentrations [range (avg ± SD)] of OC, TN, OC/TN ratio, δ13C, and δ15N in the Sundarban sediments

From: Sources and dynamics of sedimentary organic matter in Sundarban mangrove estuary from Indo-Gangetic delta

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)