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Table 1

Lake water characteristics during the 22 weeks of experiments

Time (week)Microbial biomass (109 cell.cm−2)Temperature (°C)pHCOD (mg.L−1)NH3-N (mg.L−1)TN (mg.L−1)TP (mg.L−1)DO (mg.L−1)TSS (mg.L−1)Grass height (mm)
0.089 ± 0.055 25.5 7.0 40.5 ± 12.7 1.06 ± 0.27 4.53 ± 1.28 0.413 ± 0.125 1.85 ± 0.42 132.1 ± 33.4 1.8 ± 1.2 
0.237 ± 0.157 24.5 6.9 34.8 ± 9.3 1.25 ± 0.43 4.27 ± 0.97 0.439 ± 0.138 1.82 ± 0.40 117.6 ± 27.8 6.2 ± 2.3 
0.723 ± 0.273 26.6 7.1 37.7 ± 13.6 0.87 ± 0.19 4.35 ± 0.10 0.395 ± 0.102 2.03 ± 0.46 102.3 ± 23.6 9.1 ± 4.5 
1.38 ± 0.57 24.7 6.8 32.5 ± 10.3 1.06 ± 0.23 3.71 ± 0.93 0.357 ± 0.095 2.47 ± 0.35 92.5 ± 19.5 10.3 ± 3.6 
2.52 ± 1.03 30.5 7.0 30.6 ± 8.8 1.12 ± 0.17 3.59 ± 0.82 0.362 ± 0.082 2.52 ± 0.43 73.8 ± 15.3 11.5 ± 2.9 
10 3.83 ± 1.38 33.8 7.2 28.4 ± 12.6 0.87 ± 0.12 3.32 ± 0.78 0.376 ± 0.087 2.48 ± 0.48 79.2 ± 17.8 12.2 ± 1.8 
12 3.51 ± 1.12 34.2 7.1 26.8 ± 9.5 0.92 ± 0.14 3.18 ± 0.74 0.327 ± 0.073 2.73 ± 0.57 52.6 ± 12.7 12.0 ± 1.9 
14 3.72 ± 1.54 32.8 7.3 24.3 ± 8.6 0.73 ± 0.15 2.67 ± 0.63 0.345 ± 0.081 2.79 ± 0.42 37.8 ± 5.6 12.3 ± 1.1 
16 4.11 ± 1.86 33.6 7.1 25.7 ± 8.3 1.08 ± 0.11 2.53 ± 0.65 0.301 ± 0.065 2.95 ± 0.45 30.3 ± 4.5 12.4 ± 1.2 
18 4.02 ± 1.27 28.5 6.9 23.5 ± 7.8 0.81 ± 0.16 2.46 ± 0.51 0.319 ± 0.056 2.87 ± 0.52 31.7 ± 5.7 12.2 ± 1.5 
20 3.97 ± 1.18 30.7 7.2 20.4 ± 9.2 0.83 ± 0.18 2.64 ± 0.47 0.328 ± 0.061 2.81 ± 0.48 36.1 ± 6.3 12.3 ± 1.2 
22 3.83 ± 1.02 27.6 7.0 22.7 ± 7.3 0.87 ± 0.14 2.58 ± 0.45 0.306 ± 0.063 2.93 ± 0.46 33.7 ± 5.8 12.1 ± 1.5 
Time (week)Microbial biomass (109 cell.cm−2)Temperature (°C)pHCOD (mg.L−1)NH3-N (mg.L−1)TN (mg.L−1)TP (mg.L−1)DO (mg.L−1)TSS (mg.L−1)Grass height (mm)
0.089 ± 0.055 25.5 7.0 40.5 ± 12.7 1.06 ± 0.27 4.53 ± 1.28 0.413 ± 0.125 1.85 ± 0.42 132.1 ± 33.4 1.8 ± 1.2 
0.237 ± 0.157 24.5 6.9 34.8 ± 9.3 1.25 ± 0.43 4.27 ± 0.97 0.439 ± 0.138 1.82 ± 0.40 117.6 ± 27.8 6.2 ± 2.3 
0.723 ± 0.273 26.6 7.1 37.7 ± 13.6 0.87 ± 0.19 4.35 ± 0.10 0.395 ± 0.102 2.03 ± 0.46 102.3 ± 23.6 9.1 ± 4.5 
1.38 ± 0.57 24.7 6.8 32.5 ± 10.3 1.06 ± 0.23 3.71 ± 0.93 0.357 ± 0.095 2.47 ± 0.35 92.5 ± 19.5 10.3 ± 3.6 
2.52 ± 1.03 30.5 7.0 30.6 ± 8.8 1.12 ± 0.17 3.59 ± 0.82 0.362 ± 0.082 2.52 ± 0.43 73.8 ± 15.3 11.5 ± 2.9 
10 3.83 ± 1.38 33.8 7.2 28.4 ± 12.6 0.87 ± 0.12 3.32 ± 0.78 0.376 ± 0.087 2.48 ± 0.48 79.2 ± 17.8 12.2 ± 1.8 
12 3.51 ± 1.12 34.2 7.1 26.8 ± 9.5 0.92 ± 0.14 3.18 ± 0.74 0.327 ± 0.073 2.73 ± 0.57 52.6 ± 12.7 12.0 ± 1.9 
14 3.72 ± 1.54 32.8 7.3 24.3 ± 8.6 0.73 ± 0.15 2.67 ± 0.63 0.345 ± 0.081 2.79 ± 0.42 37.8 ± 5.6 12.3 ± 1.1 
16 4.11 ± 1.86 33.6 7.1 25.7 ± 8.3 1.08 ± 0.11 2.53 ± 0.65 0.301 ± 0.065 2.95 ± 0.45 30.3 ± 4.5 12.4 ± 1.2 
18 4.02 ± 1.27 28.5 6.9 23.5 ± 7.8 0.81 ± 0.16 2.46 ± 0.51 0.319 ± 0.056 2.87 ± 0.52 31.7 ± 5.7 12.2 ± 1.5 
20 3.97 ± 1.18 30.7 7.2 20.4 ± 9.2 0.83 ± 0.18 2.64 ± 0.47 0.328 ± 0.061 2.81 ± 0.48 36.1 ± 6.3 12.3 ± 1.2 
22 3.83 ± 1.02 27.6 7.0 22.7 ± 7.3 0.87 ± 0.14 2.58 ± 0.45 0.306 ± 0.063 2.93 ± 0.46 33.7 ± 5.8 12.1 ± 1.5 
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