Table 2 Solute concentrations and DOM molecular composition of the reference (Chilnualna) streamwater in Yosemite National Park, California, USA. Streamwater was sampled from the reference site >100 years after the last fire. Values shown are means ± (standard error)

Solutes

N = 8

 DOC (mg L⁻¹)

2.14 (0.43)

 DON (mg L⁻¹)

0.078 (0.008)

 TDN (mg L⁻¹)

0.12 (0.02)

 NO₃⁻ (mg L⁻¹)

0.028 (0.010)

 NH₄⁺ (μL⁻¹)

12.13 (2.88)

 Ca²⁺ (mg L⁻¹)

2.41 (0.23)

 Cl⁻ (mg L⁻¹)

3.69 (0.08)

 Na⁺ (mg L⁻¹)

2.84 (0.14)

 K⁺ (mg L⁻¹)

0.30 (0.03)

 Mg²⁺ (mg L⁻¹)

0.26 (0.03)

 SO₄²⁺ (mg L⁻¹)

0.10 (0.01)

 PO₄³⁻ (μL⁻¹)

1.32 (0.43)

DOM composition

N = 4

 SUVA₂₅₄ (mg C L⁻¹ m⁻¹)

4.29 (0.66)

 E₂:E₃

5.19 (0.53)

 Arom:Oxy ratio

0.04 (0.01)

 Aromatic (%)

0.71 (0.23)

 Unsaturated (%)

0.57 (0.18)

 Oxygenated (%)

21.20 (1.73)

 Functionalized aliphatics (%)

13.08 (0.29)

 Aliphatics (%)

64.43 (1.43)