Convergence of soil nitrogen isotopes across global climate gradients (original) (raw)

AI-generated Abstract

This study quantifies global patterns of terrestrial nitrogen (N) cycling by analyzing the 15N/14N ratio of soil organic matter across various climate gradients. Synthesizing data from over 6000 soil samples, findings reveal strong relationships between nitrogen isotopes, climate variables such as mean annual temperature (MAT) and precipitation (MAP), and soil properties like organic carbon and clay concentrations. The results indicate that in hot and dry ecosystems, soil organic matter is more enriched in 15N compared to cold and wet ecosystems, with implications for understanding ecosystem N cycling and global gaseous nitrogen loss.