Variable | Units | Value |
---|---|---|
Surface area | km2 | 62 |
Water depth | m | 50-150 |
Altitude | -2.8 | |
Natural trophic status | Hypertrophic | |
Transparency | cm | 20-60 |
Salinity | PSU | 2.8-4.0 |
Dissolved oxygen (DO) | mg l-1 | 0.0-12.0 |
pH | 7.0-8.6 |
AQS | 2.23 | 5.44 | 3.05 | 1.61 | 3.67 |
AQN | 2.33 | 4.72 | 2.84 | 1.75 | 1.68 |
WBS | 2.23 | 3.73 | 2.54 | 1.38 | 1.73 |
WBN | 2.21 | 4.21 | 3.21 | 1.27 | 1.32 |
MBE | 2.26 | 4.57 | 3.35 | 1.29 | 1.33 |
MBS | 2.21 | 4.40 | 2.94 | 1.54 | 2.28 |
MBN | 2.29 | 4.85 | 3.05 | 1.62 | 1.82 |
SBS | 2.30 | 3.91 | 2.36 | 1.85 | 2.97 |
SBW | 2.18 | 4.47 | 2.61 | 1.82 | 1.83 |
SBE | 2.18 | 4.90 | 2.85 | 1.91 | 2.60 |
Freshwater | Marine | |||
---|---|---|---|---|
TEL | PEL | TEL | PEL | |
Zn | 123 | 315 | 124 | 271 |
Cu | 35.7 | 197 | 18.7 | 108 |
Pb | 35 | 91.3 | 30.2 | 112 |
Available-P | 1.00 | ||||||
Fe-P | 0.21 | 1.00 | |||||
Al-P | 0.30 | -0.05 | 1.00 | ||||
Ca-P | 0.57 | -0.26 | 0.67 P < 0.05 |
1.00 | |||
Org -P | 0.47 | 0.31 | 0.62 | 0.42 | 1.00 | ||
Inorg -P | 0.60 | -0.02 | 0.89 P < 0.01; n = 10 |
0.91 P < 0.01; n = 10 |
0.63 | 1.00 | |
Total P | 0.59 | 0.17 | 0.83 P < 0.01; n = 10 |
0.73 P < 0.05 |
0.91 P < 0.01; n = 10 |
0.90 P < 0.01; n = 10 |
1.00 |
Site Name | Site code | Gravel |
Sand |
Mud |
Type | OM Unpublished data |
Carbonate Unpublished data |
---|---|---|---|---|---|---|---|
Aquaculture Basin (south) | AQS | 0.00 | 43.70 | 56.30 | Sandy mud | 18.00 | 41.2 |
Aquaculture Basin (north) | AQN | 0.05 | 71.71 | 28.24 | Gravelly muddy sand | 10.53 | 31.4 |
West Basin (south) | WBS | 1.02 | 49.8 | 49.18 | Gravelly muddy sand | 10.11 | 49.0 |
West Basin (north) | WBN | 2.36 | 67.88 | 29.76 | Gravelly muddy sand | 13.94 | 50.2 |
Main Basin (east) | MBE | 0.11 | 72.88 | 27.01 | Gravelly muddy sand | 17.86 | 29.6 |
Main Basin (south) | MBS | 0.00 | 72.55 | 27.45 | Muddy sand | 14.01 | 34.3 |
Main Basin (north) | MBN | 0.00 | 65.76 | 34.24 | Muddy sand | 13.08 | 37.0 |
South Basin (south) | SBS | 2.69 | 64.07 | 33.24 | Gravelly muddy sand | 6.26 | 24.7 |
South Basin (west) | SBW | 3.05 | 80.51 | 16.44 | Gravelly muddy sand | 7.52 | 39.2 |
South Basin (east) | SBE | 3.96 | 71.45 | 24.59 | Gravelly muddy sand | 5.72 | 25.0 |
Mn | 12.0-14.7 | 0.84 | 13.7 |
Zn | 34.3-61.2 | 7.72 | 48.6 |
Cu | 27.4-89.0 | 21.51 | 46.9 |
Pb | 44.5-107.6 | 21.25 | 64.2 |
Extraction step | Reactive/concentration/pH | Solid phase |
---|---|---|
1 | 1 M MgCl2 (pH = 7) | Exchangeable fraction (F1) |
2 | 1 M CH3COONa, CH3COOH (pH = 5) | Carbonate bound fraction (F2) |
3 | 0.04 M NH2OH.HCl, CH3COOH (pH = 2, 96±3oC) | Fe/Mn oxides bound fraction (F3) |
4 | H2O2 (HNO3 pH = 2, 85 ±2oC), 3M CH3COONH4 | Organic matter and sulfide bound fraction (F4) |
5 | HNO3:HClO4 (4:1) (150oC) | Residual fraction (F5) |
Metal | Site | F1 | F2 | F3 | F4 | F5 | TM | Recovery | |||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
μg g-1 | % | μg g-1 | % | μg g-1 | % | μg g-1 | % | μg g-1 | % | μg g-1 | % | ||
Fe | AQS | 6.4 | 0.7 | 12.2 | 1.4 | 273.4 | 31.4 | 187.0 | 21.5 | 390.7 | 44.9 | 911 | 95.5 |
AQN | 6.4 | 0.7 | 12.2 | 1.4 | 298.2 | 32.9 | 200.2 | 22.1 | 388.8 | 42.9 | 898 | 100.9 | |
WBS | 6.4 | 0.7 | 12.2 | 1.4 | 248.5 | 28.7 | 211.2 | 24.4 | 388.8 | 44.8 | 901 | 96.2 | |
WBN | 6.4 | 0.8 | 16.1 | 1.9 | 248.5 | 29.5 | 191.0 | 22.7 | 381.1 | 45.2 | 851 | 99.1 | |
MBE | 6.4 | 0.7 | 16.1 | 1.9 | 271.3 | 31.4 | 187.5 | 21.7 | 383.3 | 44.3 | 912 | 94.8 | |
MBS | 6.9 | 0.8 | 16.1 | 1.9 | 271.3 | 31.7 | 174.3 | 20.4 | 387.4 | 45.3 | 909 | 94.2 | |
MBN | 6.9 | 0.8 | 16.1 | 1.8 | 301.3 | 34.0 | 174.3 | 19.7 | 387.4 | 43.7 | 920 | 96.3 | |
SBS | 6.4 | 0.7 | 20.2 | 2.3 | 278.2 | 31.9 | 187.0 | 21.5 | 379.3 | 43.5 | 911 | 95.6 | |
SBW | 6.4 | 0.8 | 12.2 | 1.5 | 242.5 | 29.0 | 191.0 | 22.8 | 384.4 | 46.0 | 860 | 97.3 | |
SBE | 9.0 | 1.1 | 12.2 | 1.5 | 242.6 | 28.9 | 191.0 | 22.8 | 384.4 | 45.8 | 858 | 97.8 | |
Mn | AQS | 19.31 | 7.77 | 64.00 | 25.76 | 62.62 | 25.21 | 56.84 | 22.88 | 45.65 | 18.38 | 260.3 | 95.5 |
AQN | 10.44 | 5.01 | 66.12 | 31.74 | 70.91 | 34.03 | 16.70 | 8.01 | 44.18 | 21.20 | 227.4 | 91.6 | |
WBS | 17.84 | 7.45 | 69.03 | 28.83 | 71.53 | 29.87 | 16.75 | 7.00 | 64.27 | 26.84 | 248.8 | 96.2 | |
WBN | 25.94 | 11.15 | 66.85 | 28.73 | 67.77 | 29.12 | 16.93 | 7.27 | 55.22 | 23.73 | 254.4 | 91.5 | |
MBE | 15.13 | 7.55 | 59.93 | 29.91 | 60.21 | 30.05 | 21.22 | 10.59 | 43.89 | 21.90 | 222.4 | 90.1 | |
MBS | 37.24 | 14.10 | 72.13 | 27.30 | 71.87 | 27.20 | 22.91 | 8.67 | 60.08 | 22.74 | 259.2 | 101.9 | |
MBN | 25.74 | 9.82 | 70.31 | 26.83 | 68.25 | 26.04 | 43.68 | 16.67 | 54.08 | 20.64 | 255.8 | 102.4 | |
SBS | 16.28 | 6.74 | 67.82 | 28.07 | 72.42 | 29.97 | 23.39 | 9.68 | 61.75 | 25.55 | 248.7 | 97.2 | |
SBW | 10.12 | 4.13 | 65.33 | 26.67 | 67.30 | 27.48 | 47.36 | 19.34 | 54.83 | 22.39 | 248.0 | 98.8 | |
SBE | 10.12 | 3.92 | 66.55 | 25.79 | 68.23 | 26.44 | 60.54 | 23.46 | 52.65 | 20.40 | 250.0 | 103.2 | |
Zn | AQS | 3.91 | 4.33 | 16.97 | 18.80 | 29.37 | 32.54 | 10.39 | 11.51 | 29.63 | 32.82 | 87.55 | 103.1 |
AQN | 4.17 | 5.58 | 10.72 | 14.33 | 28.49 | 38.09 | 5.11 | 6.83 | 26.31 | 35.17 | 80.03 | 93.5 | |
WBS | 4.04 | 5.90 | 9.90 | 14.46 | 22.53 | 32.91 | 5.07 | 7.40 | 26.92 | 39.32 | 76.73 | 89.2 | |
WBN | 5.67 | 5.63 | 27.47 | 27.26 | 31.11 | 30.88 | 5.08 | 5.04 | 31.42 | 31.19 | 99.45 | 101.3 | |
MBE | 8.98 | 8.26 | 30.19 | 27.78 | 31.85 | 29.31 | 5.19 | 4.77 | 32.45 | 29.86 | 111.60 | 97.4 | |
MBS | 5.35 | 7.10 | 15.38 | 20.38 | 23.94 | 31.73 | 5.09 | 6.75 | 25.68 | 34.04 | 83.08 | 90.8 | |
MBN | 5.03 | 5.58 | 20.33 | 22.54 | 27.40 | 30.38 | 7.87 | 8.73 | 29.58 | 32.78 | 95.23 | 94.7 | |
SBS | 4.36 | 7.86 | 2.57 | 4.64 | 19.78 | 35.65 | 5.28 | 9.52 | 23.49 | 42.34 | 62.45 | 88.8 | |
SBW | 4.36 | 5.90 | 11.50 | 15.57 | 24.15 | 32.69 | 5.59 | 7.57 | 28.27 | 38.27 | 84.63 | 87.3 | |
SBE | 5.61 | 6.31 | 15.86 | 17.82 | 29.14 | 32.74 | 7.20 | 8.09 | 31.18 | 35.04 | 86.78 | 102.6 | |
Cu | AQS | 1.39 | 4.51 | 3.16 | 10.27 | 3.62 | 11.79 | 3.52 | 11.46 | 19.05 | 61.97 | 28.30 | 108.6 |
AQN | 0.41 | 1.92 | 2.74 | 12.92 | 3.31 | 15.64 | 2.59 | 12.22 | 12.14 | 57.30 | 24.73 | 85.7 | |
WBS | 0.73 | 1.96 | 3.31 | 8.93 | 3.48 | 9.39 | 2.70 | 7.28 | 26.86 | 72.45 | 43.05 | 86.1 | |
WBN | 1.40 | 2.33 | 4.60 | 7.66 | 3.90 | 6.49 | 2.82 | 4.70 | 47.33 | 78.83 | 58.13 | 103.3 | |
MBE | 1.18 | 1.55 | 7.02 | 9.27 | 4.22 | 5.57 | 4.43 | 5.84 | 58.88 | 77.77 | 73.05 | 103.6 | |
MBS | 0.74 | 1.97 | 5.69 | 15.20 | 3.80 | 10.15 | 2.85 | 7.62 | 24.34 | 65.06 | 43.85 | 85.3 | |
MBN | 0.63 | 1.78 | 6.49 | 18.46 | 3.72 | 10.59 | 2.64 | 7.52 | 21.66 | 61.64 | 40.00 | 87.9 | |
SBS | 0.45 | 2.24 | 2.40 | 11.91 | 3.78 | 18.77 | 2.64 | 13.14 | 10.85 | 53.94 | 22.50 | 89.4 | |
SBW | 0.28 | 1.37 | 2.75 | 13.65 | 3.07 | 15.25 | 2.97 | 14.76 | 11.07 | 54.97 | 21.70 | 92.8 | |
SBE | 0.87 | 4.19 | 2.61 | 12.55 | 3.49 | 16.82 | 2.94 | 14.17 | 10.85 | 52.28 | 22.53 | 92.1 | |
Pb | AQS | 1.51 | 9.90 | 5.48 | 35.83 | 2.29 | 15.00 | 1.84 | 12.03 | 4.16 | 27.24 | 18.02 | 84.9 |
AQN | 1.51 | 6.06 | 5.09 | 20.36 | 1.84 | 7.36 | 1.64 | 6.58 | 14.90 | 59.64 | 23.82 | 104.9 | |
WBS | 1.00 | 6.56 | 1.78 | 11.70 | 1.58 | 10.41 | 2.03 | 13.41 | 8.79 | 57.93 | 16.02 | 94.7 | |
WBN | 2.16 | 6.68 | 1.91 | 5.89 | 1.71 | 5.27 | 2.16 | 6.68 | 24.45 | 75.48 | 31.82 | 101.8 | |
MBE | 1.78 | 5.27 | 1.97 | 5.85 | 2.36 | 7.00 | 2.29 | 6.81 | 25.29 | 75.07 | 39.26 | 85.8 | |
MBS | 1.97 | 8.63 | 6.71 | 29.39 | 2.30 | 10.05 | 1.84 | 8.05 | 10.02 | 43.88 | 26.04 | 87.7 | |
MBN | 2.10 | 11.60 | 2.36 | 13.03 | 1.90 | 10.52 | 1.78 | 9.81 | 9.96 | 55.04 | 20.42 | 88.6 | |
SBS | 1.78 | 10.78 | 5.02 | 30.49 | 2.03 | 12.33 | 2.10 | 12.76 | 5.54 | 33.64 | 18.22 | 90.4 | |
SBW | 2.03 | 11.97 | 1.78 | 10.44 | 1.84 | 10.82 | 2.03 | 11.97 | 9.31 | 54.79 | 19.80 | 85.8 | |
SBE | 1.71 | 12.72 | 2.30 | 17.11 | 2.23 | 16.59 | 2.03 | 15.15 | 5.16 | 38.43 | 15.78 | 85.0 |