Table 2.
Characteristics of sediments from P. australis (P), S. alterniflora (S) and transition (T) stands in the Dongtan salt marsh in the Yangtze estuary.
| Sample | pH | Temperature (°C) | Conductivity (mS) | Sulfate (mg kg −1) | TC (% of dry soil) | TN (% of dry soil) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Spring | Summer | Spring | Summer | Spring | Summer | Spring | Summer | Spring | Summer | Spring | Summer | |
| Pa | 6.1 ± 0.1 | 7.1 ± 0.1 | 15.4 ± 0.9 | 27.9 ± 0.1 | ND | 7.8 ± 0.6 | 242.4 | 272.2 | 2.1 | 2 | 0.14 | 0.14 |
| Pb | 5.9 ± 0.1 | 7.1 ± 0.1 | 14.8 ± 0.2 | 28.1 ± 0.1 | 7.5 ± 1.2 | 7.3 ± 0.2 | 224.7 | 275.4 | 2.4 | 2 | 0.21 | 0.14 |
| Ta | 6.2 ± 0.2 | 7.1 ± 0.1 | 15.9 ± 0.4 | 27.5 ± 0.2 | ND | 8.2 ± 1.1 | 287.3 | 331 | 2.7 | 2.5 | 0.19 | 0.18 |
| Tb | 5.9 ± 0.1 | 7.3 ± 0.4 | 16.3 ± 0.3 | 28.1 ± 0.1 | 6.6 ± 0.5 | 7.7 ± 0.5 | 245.3 | 254.7 | 3.1 | 2.6 | 0.22 | 0.18 |
| Sa | 5.8 ± 0.2 | 6.9 ± 0.1 | 15.5 ± 0.4 | 27.8 ± 0.2 | ND | 9.4 ± 0.7 | 263.4 | 331.8 | 3.3 | 3.5 | 0.25 | 0.23 |
| Sb | 6.2 ± 0.2 | 7.4 ± 0.4 | 13.5 ± 0.4 | 27.9 ± 0.1 | 8.2 ± 0.8 | 7.4 ± 0.3 | 326.6 | 325 | 3.5 | 3.3 | 0.24 | 0.22 |
In the sample names, ‘a’ and ‘b’ represent the replicate sampling locations.
Values given for pH, temperature and conductivity are the means ± standard deviations of 5 replicate measurements, but sulfate was measured once (from the mixed samples) in the lab. ND, not determined.