Table 1 Physico-chemical parameters, annual mean standard deviation, and total range values from NyF and CVA streams (Patagonia, Argentina)

Physical parameters

Mean ± SD

Range

Mean ± SD

Range

  Water temperature (°C)

10.4 ± 2.7

7.6 to 13.6

6.5 ± 2.4

4.0 to 9.4

  Wet width (m)

21.1 ± 3.1

17.5 to 25.0

7.2 ± 2.9

4.6 to 11.0

  Depth (m)

0.2 ± 0.1

0.19 to 0.32

0.2 ± 0.0

0.20 to 0.28

  Water velocity (ms⁻¹)

0.8 ± 0.2

0.68 to 1.0

1.1 ± 0.2

0.93 to 1.15

  Discharge (m³ s⁻¹)

4.6 ± 2.4

2.71 to 8.0

1.9 ± 0.9

0.92 to 3.08

  Boulder

20

15

  Cobble

25

30

  Pebble

10

15

  Gravel

30

25

  Sand

15

15

Chemical parameters

Mean ± SD

Range

Mean ± SD

Range

  Conductivity (μS cm⁻¹)

114.0 ± 2.7

112.0 to 118.0

50.0 ± 14.0

38.0 to 63.0

  Dissolved oxygen (mg l⁻¹)

8.8 ± 1.6

7.7 to 11.1

11.1 ± 1.7

9.7 to 13.0

  pH

7.6 ± 0.4

7.2 to 7.9

7.3 ± 0.1

7.1 to 7.4

  Turbidity (TNU)

4.2 ± 3.9

2.0 to 10.0

10.0 ± 15.0

0 to 27.0

  Ammonium (μg L⁻¹)

1.05 ± 0.5

0.6 to 1.6

0.86 ± 0.7

0 to 1.7

  Nitrate + nitrite nitrogen (μg L⁻¹)

0.18 ± 0.2

0.1 to 0.3

0.17 ± 0.2

0 to 0.3

  Soluble reactive phosphate (μg L⁻¹)

0.37 ± 0.0

0.3 to 0.4

0.53 ± 0.2

0.2 to 0.7

  Total suspended solids (mg L⁻¹)

2.74 ± 0.8

1.7 to 3.6

2.38 ± 1.8

0.7 to 4.4