TABLE 1.
Description of morphometric and environmental variables (mean ± SD) and macroinvertebrates (mean ± SD) from 13 lakes of Lianhuan Lake
| Variables | Aobao | Amuta | Beiqin | Delong | Habuta | Huoshaohei | Nashidai | Rbagu | Tiehala | Talahong | Xihulu | Yangcaohao | Yamenqi |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lake morphometrics | |||||||||||||
| Surface area (km2) | 18.4 | 37.4 | 11.7 | 7.4 | 1.4 | 41.1 | 11.6 | 24.8 | 14.0 | 52.2 | 50.6 | 6.9 | 19.1 |
| Perimeter (km) | 45.9 | 82.8 | 20.4 | 26.1 | 2.6 | 57.6 | 25.6 | 57.1 | 39.2 | 68.9 | 73.6 | 27.3 | 45.5 |
| Environmental variables | |||||||||||||
| WD (m) | 3.15 ± 0.06 | 3.10 ± 0.28 | 4.00 ± 0.10 | 2.90 ± 0.09 | 2.80 ± 0.01 | 3.23 ± 0.35 | 2.85 ± 0.05 | 3.06 ± 0.28 | 3.10 ± 0.11 | 2.73 ± 0.40 | 3.00 ± 0.01 | 2.90 ± 0.01 | 2.40 ± 0.01 |
| WT (°C) | 19.13 ± 3.16 | 21.95 ± 0.92 | 22.10 ± 2.77 | 21.17 ± 3.00 | 21.43 ± 2.79 | 20.53 ± 2.43 | 21.13 ± 2.62 | 20.09 ± 2.76 | 20.82 ± 2.65 | 20.37 ± 2.78 | 19.38 ± 1.87 | 19.77 ± 3.11 | 19.25 ± 3.32 |
| DO (mg/L) | 8.65 ± 1.39 | 8.53 ± 0.30 | 9.08 ± 0.78 | 9.12 ± 1.23 | 8.20 ± 1.04 | 9.36 ± 0.71 | 9.32 ± 1.55 | 9.01 ± 0.52 | 9.33 ± 0.71 | 9.81 ± 0.75 | 8.57 ± 1.77 | 8.72 ± 1.12 | 8.26 ± 1.20 |
| pH | 8.58 ± 0.17 | 8.78 ± 0.02 | 8.14 ± 0.10 | 8.21 ± 0.28 | 7.81 ± 0.29 | 8.57 ± 0.12 | 8.79 ± 0.09 | 8.48 ± 0.21 | 8.50 ± 0.17 | 8.62 ± 0.17 | 8.68 ± 0.18 | 8.49 ± 0.21 | 8.60 ± 0.13 |
| COND (μS/cm) | 554.08 ± 3.79 | 586.50 ± 21.92 | 440.70 ± 22.98 | 532.82 ± 116.83 | 783.00 ± 283.44 | 660.22 ± 107.94 | 741.67 ± 16.97 | 647.90 ± 134.38 | 664.17 ± 116.97 | 638.45 ± 27.51 | 756.33 ± 131.67 | 560.00 ± 7.94 | 538.70 ± 10.32 |
| CODMn (mg/L) | 5.86 ± 0.78 | 6.53 ± 0.29 | 6.43 ± 0.46 | 9.46 ± 3.06 | 8.57 ± 1.24 | 6.19 ± 0.95 | 8.72 ± 4.11 | 6.10 ± 0.43 | 7.78 ± 4.51 | 6.86 ± 0.52 | 6.16 ± 0.87 | 7.13 ± 0.37 | 6.33 ± 0.30 |
| TP (mg/L) | 0.10 ± 0.01 | 0.16 ± 0.02 | 0.06 ± 0.01 | 0.11 ± 0.02 | 0.09 ± 0.02 | 0.12 ± 0.02 | 0.16 ± 0.04 | 0.13 ± 0.08 | 0.13 ± 0.04 | 0.14 ± 0.02 | 0.15 ± 0.02 | 0.14 ± 0.06 | 0.14 ± 0.02 |
| TN (mg/L) | 1.88 ± 1.30 | 2.24 ± 0.13 | 1.68 ± 0.23 | 2.05 ± 0.42 | 1.96 ± 0.43 | 1.51 ± 0.37 | 1.39 ± 0.36 | 1.68 ± 0.37 | 1.68 ± 0.39 | 1.60 ± 0.63 | 1.03 ± 0.35 | 1.32 ± 0.27 | 1.66 ± 0.21 |
| NH3–N (mg/L) | 0.50 ± 0.33 | 0.94 ± 0.07 | 0.31 ± 0.13 | 0.60 ± 0.44 | 0.74 ± 0.67 | 0.64 ± 0.38 | 0.96 ± 0.54 | 0.61 ± 0.36 | 0.80 ± 0.46 | 0.88 ± 0.39 | 1.02 ± 0.52 | 0.85 ± 0.49 | 0.49 ± 0.39 |
| NO3–N (mg/L) | 0.13 ± 0.05 | 0.11 ± 0.04 | 0.11 ± 0.01 | 0.13 ± 0.03 | 0.17 ± 0.01 | 0.13 ± 0.05 | 0.15 ± 0.08 | 0.10 ± 0.04 | 0.14 ± 0.05 | 0.12 ± 0.04 | 0.14 ± 0.07 | 0.12 ± 0.01 | 0.14 ± 0.01 |
| NO2–N (mg/L) | 0.07 ± 0.01 | 0.08 ± 0.01 | 0.02 ± 0.01 | 0.05 ± 0.02 | 0.07 ± 0.06 | 0.06 ± 0.02 | 0.10 ± 0.03 | 0.07 ± 0.04 | 0.07 ± 0.02 | 0.10 ± 0.02 | 0.10 ± 0.01 | 0.10 ± 0.03 | 0.07 ± 0.01 |
| Chla (μg/L) | 11,729.16 ± 2806.38 | 27,989.89 ± 437.44 | 584.50 ± 249.58 | 10,790.53 ± 8225.70 | 7756.34 ± 7417.86 | 10,513.54 ± 8122.56 | 13,350.05 ± 1148.69 | 9597.12 ± 7388.88 | 13,021.56 ± 9734.60 | 11,838.68 ± 9424.08 | 12,613.44 ± 9412.88 | 16,046.17 ± 1354.47 | 13,793.77 ± 7584.95 |
| SS (mg/L) | 12.50 ± 10.79 | 28.00 ± 11.31 | 6.00 ± 3.68 | 9.33 ± 7.21 | 6.66 ± 3.79 | 23.11 ± 8.88 | 22.17 ± 14.99 | 15.56 ± 9.05 | 24.17 ± 17.01 | 20.00 ± 7.35 | 20.66 ± 3.64 | 23.66 ± 9.24 | 12.00 ± 1.41 |
| Macroinvertebrates | |||||||||||||
| Abundance (ind./m2) | 728.0 ± 392.0 | 1056.0 ± 354.2 | 496.0 ± 206.8 | 869.3 ± 150.3 | 1754.7 ± 768.0 | 736.0 ± 119.7 | 1013.3 ± 723.9 | 794.7 ± 274.4 | 629.3 ± 324.3 | 394.7 ± 300.6 | 1296.0 ± 1172.7 | 160.0 ± 22.6 | 504.0 ± 216.0 |
| Biomass (g/m2) | 3.4 ± 2.0 | 15.8 ± 5.3 | 25.9 ± 10.8 | 59.4 ± 56.4 | 156.8 ± 92.5 | 2.6 ± 0.9 | 11.6 ± 10.0 | 18.7 ± 17.9 | 34.2 ± 33.0 | 3.7 ± 2.2 | 4.3 ± 3.1 | 4.8 ± 4.0 | 1.6 ± 1.2 |
The bold environmental variables and macroinvertebrates indicate significant differences (p < .05) among lakes based on Kruskal–Wallis test. Environmental variable abbreviations are described in Section 2.