Soil As Levels and Bioaccumulation in Suaeda salsa and Phragmites australis Wetlands of the Yellow River Estuary, China

Table 1

Soil properties in both Suaeda salsa and Phragmites australis wetlands in summer and autumn.

	Suaeda salsa wetlands		Phragmites australis wetlands
	Summer	Autumn	Summer	Autumn
Moisture (%)	25 ± 1.26^Aa	25 ± 0.34^Aa	27.49 ± 0.97^Aa	25.43 ± 1.13^Aa
BD (g/cm^3)	1.83 ± 0.01^Aa	1.84 ± 0.04^Aa	1.82 ± 0.03^Aa	1.81 ± 0.03^Aa
Porosity	30.94 ± 0.22^Aa	26.40 ± 0.34^Bb	31.32 ± 0.68^Aa	25.43 ± 0.27^Bb
pH	8.42 ± 0.07^Aa	7.91 ± 0.07^Bb	8.36 ± 0.07^Aa	8.29 ± 0.12^Ba
Salinity ()	1.35 ± 0.24^Aa	1.46 ± 0.27^Aa	1.35 ± 0.47^Aa	0.78 ± 0.43^Bb
SOM (%)	6.06 ± 0.35^Aa	7.17 ± 1.29^Aa	5.60 ± 0.49^Aa	6.89 ± 0.99^Aa
As (mg/kg)	36.22 ± 2.25^Aa	28.48 ± 3.63^Ab	37.49 ± 2.13^Aa	23.27 ± 2.73^Bb
As storage (kg/ha)	133.02 ± 8.41^Aa	104.70 ± 12.79^Aa	137.18 ± 10.09^Aa	83.80 ± 8.81^Bb
TS (mg/kg)	609.31 ± 23.19^Aa	687.11 ± 46.40^Aa	554.20 ± 38.89^Ba	528.87 ± 11.46^Ba
TP (mg/kg)	674.48 ± 15.19^Aa	627.97 ± 15.91^Ab	657.31 ± 23.74^Aa	612.18 ± 17.97^Aa

BD: bulk density; SOM: soil organic matter; TP: total phosphorus; TS: total sulfur.
Different letters (AB) indicate significant differences in soil properties between Phragmites australis and Suaeda salsa in the same season.
Different numbers (ab) indicate significant differences in soil properties between summer and autumn in the same wetlands. SE means the standard error.