Table 1.
Monthly average physical and chemical properties across all lagoons.
| April (n = 13) | June (n = 15) | August (n = 57) | |
|---|---|---|---|
| Salinity | 35.6 (4.4) | 5.4 (9.9) | 22.5 (6.8) |
| Temperature (°C) | −2.0 (0.3) | 2.0 (1.5) | 8.9 (2.9) |
| DO (mg l−1) | 12.1 (2.1) | 13.4 (1.0) | 10.7 (1.3) |
| Chl a (μg l−1) | 0.042 (0.03) | 2.3 (3.8) | 0.38 (0.4) |
| pH | 7.5 (0.3) | 7.9 (0.3) | 7.9 (0.2) |
| BA (× 108 cells/L) | 4.0 (4.5) | 6.6 (2.9) | 8.7 (5.5) |
| DOC (μmol) | 107.9 (23.2) | 211.3 (57.2) | 109.9 (37.7) |
| DON (μmol) | 5.4 (6.6) | 6.6 (2.9) | 6.4 (2.0) |
| DOC:DON | 15.6 (11.8) | 45.4 (43.5) | 18.5 (7.5) |
| SUVA254 | 2.3 (1.1) | 3.5 (0.5) | 2.6 (1.0) |
| S275–295 | −0.014 (0.005) | −0.014 (0.001) | −0.014 (0.004) |
| TDN (mg/l) | 0.18 (0.09) | 0.13 (0.03) | 0.10 (0.02) |
| NO3 (μmol) | 2.8 (2.0) | 1.2 (1.6) | 0.081 (0.3) |
| NH4 (μmol) | 4.9 (10.5) | 1.4 (1.6) | 0.3 (0.7) |
| POC (μg l−1) | 106.6 (119.7) | 538.4 (152.3) | 216.4 (75.7) |
| PN (μg l−1) | 17.9 (22.5) | 74.4 (19.3) | 36.6 (12.9) |
| POC:PN | 6.7 (1.3) | 7.3 (1.2) | 6.0 (0.9) |
| POC δ13C (‰) | −26.7 (1.3) | −28.5 (1.4) | −26.8 (2.6) |
| PN δ15N (‰) | 5.2 (2.4) | 4.7 (2.3) | 6.5 (1.7) |
| H2O-δ18O | −3.7 (0.5) | −15.3 (3.2) | −6.4 (3.0) |
BA, bacterial abundance.
Standard deviations are given in parentheses.