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Table 4 Average values (±DE) of environmental variables recorded at surface and deeper strata of each sampling site in Caucahue Channel. REF = references sites; Q1, Q9, Q11 = mussel farms; Q2, Q6, Q12 = salmon farms

From: Macrofauna community patterns in a Chiloe Island channel used intensely for aquaculture: the ecological status of its benthic environment

Variable REF Q 1 Q 9 Q 11 Q 2 Q 6 Q 12
Depth (m) 56.57 ± 37.41 41 ± 0 50 ± 0 26 ± 0 50 ± 0 30 77 ± 0
Surface Temperature (°C) 10.53 ± 0.15 10.51 ± 0.07 10.62 ± 0.06 10.55 ± 0.02 10.14 ± 0.24 10.49 10.73 ± 0.08
Bottom Temperature (°C) 10.54 ± 0.12 10.61 ± 0.13 10.78 ± 0.13 10.73 ± 0.14 10.42 ± 0.14 10.63 10.81 ± 0.11
Surface Conductivity (mS/cm) 36.09 ± 0.21 35.92 ± 0.16 35.81 ± 0.32 35.52 ± 1.12 35.16 ± 0.58 36.04 36.18 ± 0.10
Bottom Conductivity (mS/cm) 36.24 ± 0.09 36.23 ± 0.12 36.37 ± 0.13 36.4 ± 0.14 35.88 ± 0.54 36.33 36.48 ± 0.15
Surface TDS (g/l) 32.43 ± 0.12 32.28 ± 0.09 32.09 ± 0.31 31.9 ± 0.99 31.92 ± 0.34 32.41 32.3 ± 0.06
Bottom TDS (g/l) 32.53 ± 0.06 32.47 ± 0.04 32.45 ± 0.07 32.52 ± 0.03 32.5 ± 0.02 32.55 32.52 ± 0.05
Surface Salinity 32.49 ± 0.14 32.33 ± 0.11 32.13 ± 0.34 31.91 ± 1.10 31.81 ± 0.49 32.46 32.39 ± 0.05
Bottom Salinity 32.59 ± 0.09 32.55 ± 0.05 32.54 ± 0.07 32.61 ± 0.03 32.58 ± 0.04 32.64 32.62 ± 0.06
Surface Dissolved Oxygen (mg/l) 7.53 ± 0.37 7.04 ± 0.85 7.38 ± 0.52 7.56 ± 0.47 7.17 ± 0.22 6.96 7.46 ± 0.46
Bottom Dissolved Oxygen (mg/l) 6.77 ± 0.55 6.55 ± 0.76 6.84 ± 0.57 6.48 ± 0.48 6.52 ± 0.21 6.63 6.81 ± 0.53
Surface pH 8.36 ± 0.05 8.34 ± 0.06 8.25 ± 0.02 8.32 ± 0.05 8.35 ± 0.11 8.33 8.17 ± 0.08
Bottom pH 8.32 ± 0.03 8.33 ± 0.05 8.25 ± 0.01 8.33 ± 0.04 8.30 ± 0.04 8.39 8.19 ± 0.03
Surface Redox (mV) 26.09 ± 9.96 28.69 ± 4.46 27.16 ± 7.41 23.88 ± 5.64 38.71 ± 13.16 34.6 23.39 ± 9.64
Bottom Redox (mV) 28.75 ± 8.15 31.71 ± 6.63 24.78 ± 4.22 21.5 ± 5.98 43.83 ± 12.75 50.5 21.01 ± 7.25
TOM (%) 3.03 ± 2.14 2.41 ± 1.83 3.78 ± 1.57 2.81 ± 1.19 2.3 ± 0.79 2.04 3.65 ± 2.22
Mean (μm) 276.42 ± 188.53 715.07 ± 843.18 604.94 ± 564.50 347.2 ± 153.59 191.04 ± 82.41 174.02 324.79 ± 352.05
Sorting (μm) 189.9 ± 100.81 359.83 ± 353.21 487.17 ± 304.34 337.63 ± 161.46 208.3 ± 108.64 122.67 315.13 ± 323.78
Gravel (%) 0.36 ± 0.01 22.55 ± 0.38 14.02 ± 0.23 1.83 ± 0.03 0.67 ± 0.01 0.03 5.53 ± 0.14
Sand (%) 84.08 ± 0.18 74.45 ± 0.38 77.05 ± 0.20 88.19 ± 0.06 76.06 ± 0.17 94.7 72.89 ± 0.16
Mud (%) 15.56 ± 0.18 2.99 ± 0.02 8.93 ± 0.10 9.98 ± 0.07 23.28 ± 0.18 5.27 21.58 ± 0.14