Table 1 Soil biogeochemical properties in different sites.

From: Exotic Spartina alterniflora invasion increases CH4 while reduces CO2 emissions from mangrove wetland soils in southeastern China

Soil biogeochemical properties

Mud

KO

AM

SA

pH

7.34 ± 0.04 ab

7.23 ± 0.11 ab

7.50 ± 0.02 a

7.04 ± 0.11 b

Salinity

9.27 ± 0.02 b

10.63 ± 0.83 b

11.77 ± 0.74 b

14.53 ± 0.15 a

EC (ms/cm)

1.70 ± 0.07 b

1.98 ± 0.24 ab

2.33 ± 0.25 ab

2.64 ± 0.05 a

Water content (%)

39.39 ± 0.19 c

43.69 ± 1.28 bc

44.78 ± 0.53 b

50.47 ± 1.30 a

TC (mg/g DW)

9.31 ± 1.78 b

12.57 ± 0.38 ab

14.53 ± 0.81 a

12.20 ± 0.15 ab

TOC (mg/g DW)

8.63 ± 0.15 b

10.72 ± 0.12 a

10.94 ± 0.88 a

10.48 ± 0.11 a

CN ratio

9.03 ± 0.30 b

10.60 ± 0.27 ab

11.47 ± 0.81 a

9.90 ± 0.07 ab

Organic matter content (%)

14.81 ± 0.56 b

16.26 ± 0.85 ab

18.96 ± 0.88 a

18.12 ± 0.15 a

MBC (mg/kg DW)

59.80 ± 24.92 c

189.18 ± 43.63 bc

221.65 ± 21.30 ab

356.17 ± 37.63 a

SO42āˆ’ concentration (mg/L)

843.18 ± 32.54 a

657.87 ± 24.30 a

423.17 ± 19.59 b

332.53 ± 10.89 b

NH4+ concentration (µg/g DW)

14.86 ± 0.24 a

15.12 ± 1.79 a

17.13 ± 1.99 a

16.52 ± 0.08 a

NO3āˆ’ concentration (µg/g DW)

1.48 ± 0.13 a

1.19 ± 0.02 a

1.08 ± 0.08 a

1.40 ± 0.10 a

NO2āˆ’ concentration (µg/g DW)

0.02 ± 0.01 a

0.01 ± 0.01 a

0.01 ± 0.01 a

0.01 ± 0.01 a

Invertase activity (mg/d/g DW)

1.12 ± 0.10 b

1.44 ± 0.19 b

2.56 ± 0.15 b

5.05 ± 0.88 a

β-glucosidase activity (mg/d/g DW)

1.53 ± 0.70 a

2.35 ± 0.18 a

2.54 ± 0.22 a

3.69 ± 0.75 a

  1. Data are given in 0–20 cm of soil depth. Mud: bare mudflat; KO: K. obovata; AM: A. marina; SA: S. alterniflora. Different lowercase letters in each column indicate a significant difference (p < 0.05). TC: total carbon; TOC: total organic carbon; MBC: microbial biomass carbon; EC: electrical conductivity; DW: dry weight. Data were presented as mean ± SE.