Table 1 Mean of the water quality parameters on each sampling date. Data for the natural hypersaline reference state were obtained from Vidal-Abarca (1985).
From: Response of biotic communities to salinity changes in a Mediterranean hypersaline stream
2003 disturbed conditions | 2004 re-established conditions | 1983 Reference conditions | |||
|---|---|---|---|---|---|
Water quality variables | J3 | O3 | J4 | O4 | July |
Maximum daily temperature (° C) | 31.4 | 26.2 | 33.7 | 29.3 | 35 |
Minimum daily temperature (° C) | 20.1 | 19.2 | 20.3 | 12.3 | |
Mean daily temperature (° C) | 25.1 | 21.9 | 25.5 | 19.4 | |
Discharge (L s-1) | 31.48 | 262.16 | 33.47 | 13.23 | |
Conductividad (mS cm-1) | 11.81 | 6.4 | 69.3 | 99 | 170 |
Salinity (g L-1) | 6.8 | 3.5 | 47.5 | 76.4 | 100 |
Maximum dissolved oxygen (mg L-1) | 16.45 | 23.1 | 16.78 | 18.17 | |
Minimum dissolved oxygen (mg L-1) | 2.22 | 5.89 | 2.3 | 4.91 | |
Mean oxygen saturation (%) | 116.43 | 111.7 | 143.69 | 152.98 | |
Suspended solids (mg L-1) | 1.63 | 8.15 | 3.64 | 5.5 | |
Chlorophyll a (mg L-1) | 4.22 | 1.52 | 25.12 | 0.83 | |
NO3-N (mg L-1) | 0.22 | 1.98 | 1.47 | 0 | 1.13 |
NO2-N (mg L-1) | 0.018 | 0.011 | 0.23 | 2.34 | 0.1 |
NH4-N (mg L-1) | 0.25 | 0.15 | 0.89 | 2.69 | 0.63 |
DIN (mg L-1) | 0.49 | 2.14 | 2.59 | 5.03 | 1.86 |
PO4-P (μg L-1) | 8.68 | 10.78 | 0 | 1.61 | 0.5 |