Global dataset on patterns and drivers of stream nitrogen uptake across biomes

This dataset contains measurements of nutrient uptake and stream ecosystem characteristics collected through field experiments across the globe since 1990. Specifically, it includes ammonium and nitrate uptake rates derived from in situ nutrient additions (both constant-rate and slug additions) conducted across multiple stream sites. In addition to nutrient uptake data, the dataset provides associated environmental variables, including stream discharge, light availability (as light inputs), and canopy cover. Background concentrations of dissolved inorganic nitrogen (DIN) and dissolved organic carbon (DOC) are reported, along with specific ultraviolet absorbance (SUVA) as a proxy for DOC quality. The dataset also includes stream metabolic rates (gross primary production, ecosystem respiration), offering insights into ecosystem function in relation to nutrient dynamics. This dataset is intended to support research on pattterns and drivers of nitrogen cycling in running waters across large spatial scales.