3.1 Nitrate and DOC effects
To assess broad differences in stream chemistry between burned and unburned watersheds, we first compared the mean pseudo yield metric for nitrate and DOC. Nitrate was not significantly different between burned and unburned watersheds (2.5\(\frac{\text{mg}\ \text{NO}_{3}^{-}-N}{L{\bullet\text{km}}^{2}\bullet\text{yr}}\)for burned and 1.3\(\frac{\text{mg}\ \text{NO}_{3}^{-}-N}{L{\bullet\text{km}}^{2}\bullet\text{yr}}\)for unburned; one-way ANOVA: F-value = 0.152; df = 1,181; p-value = 0.697; Fig. S3). Similarly, variation did not significantly differ between burned (sd: 10.38, range: [0:87]) and unburned watersheds (sd: 10.5, range: [0:15]; Levene’s: F-value = 0.746; df = 1,181; p-value = 0.389; Fig. S4).
In a similar fashion to nitrate, the mean yield for DOC (4.7\(\frac{\text{mg}\ \text{DOC}-C}{L{\bullet\text{km}}^{2}\bullet\text{yr}}\)for burned and 6.5\(\ \frac{\text{mg}\ \text{DOC}-C}{L{\bullet\text{km}}^{2}\bullet\text{yr}}\)for unburned) were not significantly different from each other (one-way ANOVA: F-value = 1.11; df = 1,92; p-value = 0.294; Fig. S5). Likewise, the variation of the yield metric for DOC did not significantly differ between burned (sd: 11.0, range: [0.01:79]) and unburned (sd: 12.6, range: [0.01:52]) watersheds (Levene’s: F-value = 0.638; df = 1,92; p-value = 0.427; Fig. S6).