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Table 2
The mean and standard deviation (SD) of environmental variables measured in eight creeks feeding Lake Sapanca (T: water temperature, EC: specific conductance, DO: dissolved oxygen, PO4–P: orthophosphate, TP: total phosphorus, NO3-N: nitrate-nitrogen, NO2-N: nitrite-nitrogen, Si: soluble silica).
| Variable | 1st station | 2nd station | 3rd station | 4th station | 5th station | 6th station | 7th station | 8th station |
|---|---|---|---|---|---|---|---|---|
| T (°C) | 17.44 ± 7.68 | 15.39 ± 6.76 | 15.82 ± 4.62 | 13.72 ± 4.95 | 14.51 ± 6.52 | 13.79 ± 6.31 | 14.37 ± 5.13 | 15.68 ± 4.64 |
| pH | 8.09 ± 0.31 | 8.02 ± 0.26 | 8.07 ± 0.22 | 8.13 ± 0.18 | 8.17 ± 0.22 | 8.24 ± 0.14 | 8.20 ± 0.16 | 8.27 ± 0.16 |
| EC (μS cm−1) | 511.20 ± 88.96 | 304.17 ± 74.14 | 362.76 ± 57.40 | 230.53 ± 114.04 | 191.78 ± 64.36 | 170.19 ± 56.13 | 214.99 ± 62.06 | 329.52 ± 93.05 |
| DO (mg L−1) | 3.40 ± 2.24 | 3.02 ± 1.54 | 3.23 ± 2.07 | 3.72 ± 2.16 | 3.55 ± 2.02 | 4.32 ± 2.04 | 4.28 ± 2.28 | 3.99 ± 2.32 |
| PO4–P (mg L−1) | 0.07 ± 0.16 | 0.08 ± 0.07 | 0.08 ± 0.12 | 0.04 ± 0.07 | 0.04 ± 0.04 | 0.02 ± 0.02 | 0.11 ± 0.24 | 0.20 ± 0.34 |
| TP (mg L−1) | 0.12 ± 0.21 | 0.09 ± 0.05 | 0.09 ± 0.06 | 0.04 ± 0.03 | 0.12 ± 0.13 | 0.05 ± 0.04 | 0.28 ± 0.17 | 0.24 ± 0.20 |
| NO3-N (mg L−1) | 1.17 ± 1.01 | 0.44 ± 0.51 | 0.72 ± 0.68 | 0.28 ± 0.30 | 0.34 ± 0.34 | 0.10 ± 0.14 | 0.34 ± 0.37 | 0.33 ± 0.29 |
| NO2-N (mg L−1) | 0.02 ± 0.04 | 0.02 ± 0.02 | 0.01 ± 0.01 | 0.01 ± 0.01 | 0.01 ± 0.01 | 0.01 ± 0.01 | 0.01 ± 0.01 | 0.03 ± 0.05 |
| Si (mg L−1) | 14.35 ± 8.03 | 12.50 ± 10.28 | 14.91 ± 14.20 | 12.85 ± 15.84 | 14.46 ± 9.16 | 15.42 ± 21.57 | 16.33 ± 15.53 | 26.35 ± 19.47 |
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