Ponds | Depth (cm) | pH | Ec (μS.cm −1 ) | Visibility (cm) | NO 3 − (mg.L −1 ) | PO 4-P (mg.L −1 ) | NH 4 + (mg.L −1 ) |
---|---|---|---|---|---|---|---|
Small artificial ponds (n = 75) | |||||||
ABCD | 29.92 | 7.09 | 13.78 | 12.08 | 0.97 | 0.18 | 0.05 |
ABC | 29.87 | 7.09 | 10.06 | 14.75 | 0.44 | 0.25 | 0.12 |
ABD | 29.28 | 7.08 | 12.30 | 14.46 | 0.64 | 0.14 | 0.08 |
ACD | 29.57 | 7.17 | 11.26 | 12.94 | 0.56 | 0.20 | 0.11 |
BCD | 29.57 | 7.11 | 12.07 | 20.74 | 0.67 | 0.18 | 0.15 |
BC | 29.66 | 7.29 | 5.62 | 15.38 | 1.19 | 0.40 | 0.07 |
BD | 29.37 | 7.33 | 5.67 | 21.25 | 0.88 | 0.18 | 0.11 |
CD | 30.11 | 7.32 | 5.53 | 18.68 | 0.79 | 0.33 | 0.07 |
sd | 0.10 | 0.04 | 1.21 | 1.24 | 0.08 | 0.03 | 0.01 |
Large artificial (n = 75) | |||||||
ABCD | 41.83 | 7.53 | 8.29 | 12.07 | 1.46 | 0.15 | 0.06 |
ABC | 37.73 | 7.23 | 9.31 | 8.06 | 2.03 | 0.24 | 0.08 |
ABD | 46.31 | 7.12 | 2.80 | 8.00 | 0.87 | 0.11 | 0.03 |
ACD | 38.99 | 7.16 | 8.60 | 6.47 | 2.33 | 1.82 | 0.05 |
BCD | 39.10 | 7.39 | 7.53 | 11.33 | 2.80 | 0.60 | 0.06 |
sd | 1.53 | 0.08 | 1.16 | 1,07 | 0.34 | 0.32 | 0.01 |