Research Article
Assessment of the Trophic Status of the South Lagoon of Tunis (Tunisia, Mediterranean Sea): Geochemical and Statistical Approaches
Table 1
Statistical summary of physicochemical parameters and nutrients in South Lagoon of Tunis.
| | Depth (m) | T (°C) | pH | DO (mg/L) | Salinity (‰) | Conductivity (S/cm) | SPM (mg/L) | NH4+ (mg/L) | NO2− (mg/L) | NO3− (mg/L) | Ortho-P (mg/L) | Chl-a (µg/L) | Pheo (µg/L) | Turbidity (100 NTU) | Transparency (m) |
| July campaign | Minimum | 2 | 28.8 | 8.48 | 3 | 48.3 | 56.8 | 0.025 | 0.071 | 0.079 | 9.295 | 2.129 | 1.108 | 4.424 | 8 | 1.3 | Maximum | 5.4 | 30 | 8.95 | 4.4 | 49.1 | 57.7 | 0.043 | 0.117 | 0.095 | 14.429 | 2.409 | 3.324 | 8.759 | 24 | 2 | Average | 2.9 | 29.5 | 8.72 | 3.5 | 48.6 | 57.1 | 0.034 | 0.088 | 0.087 | 11.593 | 2.275 | 2.137 | 6.230 | 15.7 | 1.5 | February campaign | Minimum | 1.8 | 15.1 | 8.5 | 6.2 | 47.5 | 55.9 | 0.019 | 0.043 | 0.550 | 3.070 | 1.601 | 0.997 | 0.598 | 1 | 1.5 | Maximum | 4.2 | 17.5 | 8.94 | 11 | 48.4 | 56.9 | 0.032 | 0.052 | 0.901 | 15.580 | 2.958 | 2.659 | 2.726 | 9 | 1.8 | Average | 2.7 | 15.9 | 8.73 | 8 | 48.1 | 56.6 | 0.027 | 0.046 | 0.643 | 9.423 | 1.790 | 1.994 | 1.612 | 4 | 1.6 | Gulf of Tunis (July) | — | 22.7 | 7.57 | 6.9 | 43.5 | 51.1 | | 0.244 | 0.11 | 1.375 | 0.465 | | | | | Nonpoint source | — | 24.7 | 7.55 | 3.9 | 6.1 | 7.12 | | 0.291 | 0.399 | 11.063 | 1.283 | | | | | Point sources | — | 24.7 | 7.63 | 3.9 | 51.8 | 51.8 | | 0.018 | 0.063 | 11.265 | 1.243 | | | | |
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