Extended Data Fig. 8: Field sampling sites, lithology, DON, DIC, and \({\mathbf{DON}}-{{\mathbf{PO}}}_{\mathbf{4}}^{{\mathbf{3}}{\mathbf{-}}}\) relationship in Malang, Indonesia in carbonate- and non-carbonate-dominated rivers.
From: Carbonate weathering enhances nitrogen assimilatory uptake in rivers globally
(a) DON distribution and DIC zonation; (b) \({\rm{DON}}-{{\rm{PO}}}_{4}^{3-}\) relationship in carbonate- and non-carbonate-dominated regions. The boxes include 25–75% of overall data. The black points, the black line inside the box, and the lines outside the boxes represent the mean value, median value, and 1.5 IQR, respectively. (c) the \({{\rm{PO}}}_{4}^{3-}\) comparison (d) the DON comparison between carbonate- and non-carbonate-dominated rivers. The two-sided Mann–Whitney test is applied to evaluate the difference between carbonate and non-carbonate regions, where p < 0.01 represents highly significant, p < 0.05 represents significant, otherwise there is no statistical significance. The solid lines in (b) are the linear regression fits, and the shades denote 95% confidence bands.
