Table 1.
Physical and chemical variables of the water samples from the six sites of Lianhuan Lake.
| The Name of the Lake | WT (°C) | DO (mg L−1) | pH | Conductivity (μs cm−1) |
COD (mg L−1) | NH4+-N (mg L−1) | WTP (mg L−1) | WTN (mg L−1) | NO2–N (mg L−1) | NO3–N (mg L−1) |
Chla (μg L−1) | SS (mg L−1) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Habuta | 22 ± 0.5 b | 7.59 ± 0.02 c | 7.84 ± 0.01 c | 654 ± 1 b | 10 ± 1 a | 1.5 ± 0.01 a | 0.1 ± 0.01 c | 1.48 ± 0.01 b | 0.14 ± 0 a | 0.17 ± 0 a | 16.3 ± 0.01 ab | 11 ± 0 b |
| Delongpao | 24.03 ± 0.95 a | 9.93 ± 0.15 a | 8.44 ± 0.17 b | 531.5 ± 50.1 d | 13.36 ± 1.71 a | 1.01 ± 0.17 c | 0.12 ± 0.01 c | 2.16 ± 0.34 a | 0.07 ± 0.02 c | 0.11 ± 0.01 b | 21.08 ± 4.18 ab | 10.67 ± 3.21 b |
| Xihulu | 21.5 ± 0.1 b | 7.36 ± 0.33 c | 8.89 ± 0.04 a | 657.33 ± 6.03 b | 5.85 ± 0.37 a | 1.43 ± 0.16 a | 0.16 ± 0.03 bc | 1.37 ± 0.28 b | 0.1 ± 0.01 b | 0.06 ± 0.01 c | 15.34 ± 1.61 ab | 16.67 ± 3.06 ab |
| Nashidai | 23.4 a | 9.95 ± 0.92 a | 8.79 ± 0.2 a | 755 ± 1.41 a | 12.14 ± 6.77 a | 1.64 ± 0.13 a | 0.18 ± 0.01 a | 1.45 ± 0.05 b | 0.12 ± 0.01 ab | 0.1 ± 0.02 bc | 21.85 ± 5.63 a | 17.5 ± 0.71 ab |
| Huoshaohei | 23.07 ± 0.15 a | 9.01 ± 0.06 b | 8.71 ± 0.02 a | 596.33 ± 0.58 c | 6.97 ± 1.31 a | 1.03 ± 0.19 bc | 0.13 ± 0.01 c | 1.5 ± 0.16 b | 0.08 ± 0.01 c | 0.1 ± 0.03 bc | 13.16 ± 3.39 c | 24.67 ± 6.51 a |
| Tiehala | 23.3 ± 0.14 a | 8.73 ± 0.18 b | 8.67 ± 0.01 ab | 595 ± 1.41 c | 11.38 ± 7.84 a | 1.36 ± 0.07 ab | 0.13 ± 0.01 bc | 1.43 ± 0.08 b | 0.09 ± 0.01 bc | 0.09 ± 0 bc | 16.56 ± 3.18 ab | 17.5 ± 4.95 ab |
Values are reported as mean ± standard error; different letters represent significant differences between treatments (p < 0.05). WT: water temperature; DO: dissolved oxygen; Conductivity: electrical conductivity; pH: pondus hydrogenii; WTP: total phosphorus in water; WTN: total nitrogen in water; NH4+-N: ammonia nitrogen; NO3−-N: nitrate nitrogen. NO2−-N: nitrous nitrogen; COD: chemical oxygen demand; Chla: chlorophyll a; SS: suspended solids. Significant variations between experimental groups were identified via ANOVA, followed by the Waller–Duncan post hoc test for pairwise comparisons.