Appendix A. Distribution of ambient nitrate concentrations and molar nitrate:orthophosphate ratios among streams used in this study, with photos of the experimental design and measured nutrient diffusion rates.

Distribution of ambient nitrate concentrations and molar nitrate:orthophosphate ratios among streams used in this study, with photos of the experimental design and measured nutrient diffusion rates.本研究所用溪流的环境硝酸盐（nitrate）浓度及硝-正磷酸盐（orthophosphate）摩尔比的分布特征，附带实验设计实拍照片及实测营养盐扩散速率的照片。