Appendix 1 - Geographic, Regional and Local Variables (Variables Excluded from Subsequent

Appendix 1 - Geographic, regional and local variables (variables excluded from subsequent analyses in bold)

Variable / Mean / SE / Min. / Max.
Geographical
Latitude / 38º258312 / 0º042837 / 37º733914 / 39º514051
Longitude / 27º006820 / 0º150962 / 25º147241 / 26º66531
Regional
Natural vegetation area (%) / 45.53 / 1.98 / 0.00 / 100.00
Pasture area (%) / 21.83 / 1.12 / 0.00 / 70.18
Agriculture (%) / 3.20 / 0.31 / 0.00 / 26.37
Forest area (%) / 26.70 / 1.34 / 0.00 / 96.84
Urban area (%) / 0.95 / 0.09 / 0.00 / 10.89
Local
Altitude (m) / 257.42 / 13.42 / 3.00 / 734.00
Temperature (ºC) / 15.80 / 0.17 / 9.40 / 31.00
pH / 7.41 / 0.04 / 4.79 / 9.30
Dissolved oxygen (%) / 100.74 / 0.44 / 70.70 / 120.00
Conductivity (µS cm-1) / 208.91 / 24.94 / 22.10 / 7300.00
Total suspended solids (mg L-1) / 6.94 / 0.92 / 0.15 / 154.00
Ammonium (µg NH4 L-1) / 0.03 / 0.00 / 0.01 / 0.55
Nitrate (µg NO3 L-1) / 0.46 / 0.03 / 0.01 / 3.36
Nitrite (µg NO2 L-1) / 0.01 / 0.00 / 0.00 / 0.05
Total inorganic nitrogen (µg N L-1) / 0.49 / 0.03 / 0.03 / 3.38
Inorganic phosphorus (µg P L-1) / 68.93 / 4.17 / 1.50 / 750.00
Total phosphorus (µg P L-1) / 77.04 / 4.22 / 1.50 / 800.00
Soluble reactive phosphorus / 52.89 / 3.24 / 0.72 / 742.25
Sulphate (mg SO42- L-1) / 6.55 / 0.69 / 0.80 / 146.00
Sodium (mg Na L-1) / 28.69 / 1.79 / 2.90 / 216.00
Chloride (mg Cl L-1) / 30.81 / 7.28 / 4.50 / 2200.00
Iron (mg Fe L-1) / 0.40 / 0.03 / 0.02 / 3.30
Biological Oxygen Demand (mg O2L-1) / 1.31 / 0.06 / 0.00 / 7.00
Chemical Oxygen Demand (mg O2L-1) / 5.81 / 0.37 / 0.97 / 47.00
Total Coliforms (ufc 100 mL-1) / 3645.63 / 320.74 / 5.00 / 30000.00