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Table 2 Variations in environmental parameters
| Variables | Dry | Rainy | Norte |
|---|---|---|---|
| (symbols, unit) | (mean ± SD) | (mean ± SD) | (mean ± SD) |
| Depth (cm) | 110.7 ± 70.2 | 157.5 ± 100.2 | 118.6 ± 91.8 |
| (35 to 280) | (24.6 to 380) | (30 to 320) | |
| Transparency (cm) | 69.8 ± 29.2 | 82.5 ± 106.7 | 44.8 ± 25.5 |
| (31 to 115) | (24.6 to 380) | (25 to 100) | |
| Temperature (°C) | 24.8 ± 1.0 | 26.4 ± 1.2 | 24.7 ± 1.3 |
| (23.4 to 27) | (24.6 to 28.6) | (23.2 to 27.3) | |
| Salinity | 17.9 ± 9.9 | 10.4 ± 3.7 | 11 ± 8.6 |
| (4 to 32) | (2.4 to 14) | (2 to 27) | |
| pH | 7.3 ± 0.4 | 7.2 ± 0.3 | 8.1 ± 0.6 |
| (6.61 to 7.7) | (6.7 to 7.74) | (7.05 to 8.98) | |
| Dissolved oxygen (O2 m l−1) | 5.6 ± 0.5 | 4.8 ± 1.3 | 4.8 ± 1.2 |
| (4.9 to 6.5) | (2.52 to 6.5) | (2.6 to 6.45) | |
| Nitrites (NO2 mg l−1) | 0.00 ± 0.0 | 0.005 ± 0.006 | 0.014 ± 0.008 |
| (0.00 to 0.045) | (0.00 to 0.02) | (0.004 to 0.03) | |
| Nitrates (NO3 mg l−1) | 0.100 ± 0.1 | 1.210 ± 1.021 | 0.028 ± 0.031 |
| (0.00 to 0.4) | (0.0 to 3.0) | (0.01 to 0.11) | |
| Ammonium (NH4 (mg l−1)) | 0.6 ± 0.4 | 0.093 ± 0.057 | 0.036 ± 0.023 |
| (0.12 to 1.2) | (0.0 to 0.22) | (0.02 to 0.09) | |
| Phosphates (PO4 − mg l−1) | 0.2 ± 0.1 | 1.731 ± 2.5 | 1.867 ± 2.811 |
| (0.12 to 0.3) | (0.22 to 7.2) | (0.08 to 6.84) | |
| Bacterial density (BD (cells.ml−1 × 106)) | 2.9 ± 2.1 | 3.8 ± 1.8 | 4.5 ± 1.3 |
| (0.67 to 8.3) | (1.3 to 6.9) | (2.6 to 6.72) | |
| Bacterial biomass (BBM (μg.C.m−3)) | 2.6 ± 0.9 | 2.7 ± 1.4 | 4.3 ± 2.1 |
| (1.2 to 3.8) | (0.7 to 4.5) | (1.8 to 9.3) | |
| Chlorophyll a (CHLA (mg l−1)) | 1.2 ± 0.5 | 3.8 ± 3.9 | 0.7 ± 0.5 |
| (0.5 to 1.9) | (0.05 to 18.3) | (0.06 to 1.6) | |
| Chlorophyll b (CHLB (mg l−1)) | 0.5 ± 0.7 | 1.4 ± 1.3 | 0.8 ± 0.6 |
| (0.1 to 2.4) | (0.24 to 4.1) | (0.07 to 1.9) | |
| Chlorophyll c (CHLC (mg l−1)) | 4.0 ± 3.4 | 1.4 ± 1.3 | 0.3 ± 0.3 |
| (0.2 to 9.6) | (0.21 to 4.4) | (0.004 to 0.9) |
