Nitrogen dynamics is a research area that focuses on the cycling and transformations of nitrogen in various ecosystems, including terrestrial, aquatic, and marine environments. This field examines the processes of nitrogen fixation, nitrification, denitrification, and nitrogen mineralization, as well as the impacts of human activities such as agriculture and pollution on nitrogen cycling. Understanding nitrogen dynamics is important for managing ecosystems, mitigating the impacts of nitrogen pollution on water quality and greenhouse gas emissions, and improving agricultural practices to increase nitrogen use efficiency.