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Table 1

Physical and chemical characteristic of studied lakes (mean values for spring-autumn ±SD).

  Strat_lake Cer_lake1 Cer_lake2 Pot_lake1 Pot_lake2
Temperature (°C) 21.2 ± 1.1 20.7 ± 1.1 19.7 ± 0.9 21.5 ± 1.1 20.8 ± 1.0
Secchi disc visibility (m) 2.6 ± 0.13 0.4 ± 0.02 0.6 ± 0.03 0.8 ± 0.04 0.5 ± 0.02
pH 8.4 ± 0.42 8.8 ± 0.44 8.8 ± 0.44 8.2 ± 0.41 8.2 ± 0.38
Conductivity (μS · cm−1) 244 ± 12 259 ± 13 283 ± 11 380 ± 19 343 ± 17
Total suspension (mg · L−1) 2.9 ± 0.15 11.2 ± 0.56 18.4 ± 0.92 27.5 ± 1.37 37.8 ± 1.89
Dissolved oxygen (mg · L−1) 9.1 ± 0.45 12.3 ± 0.62 10.3 ± 0.59 11.5 ± 0.57 13.7 ± 0.68
NH4–N (mg · L−1) 0.098 ± 0.04 0.164 ± 0.008 0.108 ± 0.005 0.148 ± 0.007 0.091 ± 0.005
NO3–N (mg · L−1) 0.080 ± 0.004 0.156 ± 0.007 0.120 ± 0.006 0.047 ± 0.002 0.085 ± 0.004
PO4–P (mg · L−1) 0.053 ± 0.002 0.042 ± 0.002 0.054 ± 0.003 0.060 ± 0.003 0.026 ± 0.001
Ptot (mg · L−1) 0.066 ± 0.003 0.209 ± 0.011 0.231 ± 0.012 0.126 ± 0.006 0.080 ± 0.004
Chlorophyll-a (μg · L−1) 10.92 ± 0.54 46.21 ± 2.3 76.9 ± 3.8 60.43 ± 3.1 51.18 ± 2.6
TOC (mg · L−1) 4.5 ± 0.5 5.7 ± 1.1 6.5 ± 0.7 4.3 ± 0.3 5.3 ± 1.4

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