From stimulation to suppression: How nitrogen addition changes soil respiration over time

Soil respiration (Rs), the efflux of CO₂ from soils to the atmosphere driven by root and microbial activity, is one of the largest terrestrial carbon fluxes and a primary determinant of net carbon sequestration. The important role of nitrogen in driving terrestrial carbon sequestration has long been recognized. However, the role of nitrogen in the temporal dynamics of Rs has not been well…