Table 2.
Physical and chemical characteristics (mean ± standard deviation) in sediment upstream and downstream of Gongguoqiao hydroelectric dam.
| Site | WC (%) | OM (%) | TN (mg·g−1 DW) | TP (mg·g−1 DW) | Microbial Activity (µg FDA g−1 DW h−1) |
Bacterial Abundance (×107 cell·g−1 DW) |
|---|---|---|---|---|---|---|
| Dry season | ||||||
| S1 | 50.8 ± 4.0 | 2.7 ± 3.5 | 5.4 ± 0.3 | 4.3 ± 1.2 | 2.5 ± 0.0 | 5.94 ± 0.42 |
| S2 | 79.4 ± 4.6 | 0.8 ± 0.2 | 4.8 ± 0.2 | 2.5 ± 0.1 | 2.0 ± 0.1 | 1.40 ± 0.04 |
| S3 | 69.0 ± 3.6 | 1.4 ± 0.3 | 5.0 ± 0.2 | 2.5 ± 0.1 | 1.6 ± 0.3 | 3.16 ± 0.78 |
| S4 | 65.8 ± 0.4 | 3.6 ± 2.0 | 5.7 ± 0.1 | 3.9 ± 0.1 | 3.8 ± 0.9 | 8.30 ± 1.780 |
| Normal season | ||||||
| S1 | 55.2 ± 8.7 | 13.0 ± 2.1 | 4.3 ± 0.1 | 5.77 ± 0.6 | 1.7 ± 0.2 | 8.24 ± 1.00 |
| S2 | 79.2 ± 6.8 | 2.6 ± 0.5 | 3.5 ± 0.1 | 3.8 ± 0.3 | 0.3 ± 0.0 | 1.91 ± 0.31 |
| S3 | 64.9 ± 5.2 | 4.9 ± 0.6 | 4.2 ± 0.2 | 5.9 ± 0.3 | 0.8 ± 0.3 | 7.31 ± 0.68 |
| S4 | 68.0 ± 3.8 | 2.6 ± 0.0 | 4.5 ± 0.4 | 8.2 ± 0.0 | 0.6 ± 0.1 | 6.33 ± 3.43 |
| Wet season | ||||||
| S1 | 56.1 ± 4.0 | 2.2 ± 0.2 | 2.4 ± 3.0 | 0.9 ± 0.0 | 0.6 ± 0.1 | 1.76 ± 0.34 |
| S2 | 79.8 ± 0.9 | 1.2 ± 0.1 | 1.7 ± 1.4 | 0.5 ± 0.0 | 0.8 ± 0.3 | 1.82 ± 0.1 |
| S3 | 76.8 ± 0.1 | 0.8 ± 0.0 | 5.2 ± 0.0 | 0.9± 0.2 | 0.6 ± 0.2 | 1.61 ± 0.95 |
| S4 | 66.9 ± 0.2 | 1.5 ± 0.4 | 4.1 ± 0.5 | 1.2 ± 0.2 | 0.6 ± 0.2 | 2.77 ± 0.41 |