24 concepts
Human-induced nitrogen input that has doubled biologically-available nitrogen on Earth
Shallow subsurface zone where river and groundwater mix, serving as a source or sink of reactive nitrogen depending on water residence times and nitrogen transformation rates
Organic carbon derived from sedimentary rocks that is often poorly quantified and influences soil organic carbon composition, age, and stability
Spatial variability in biogeochemical processes and solute sources within watersheds, particularly between shallow soil zones and deeper groundwater zones
The relationship between solute concentrations and discharge in streams, widely used as a metric for interpreting interaction of hydrological processes, chemical transport, and mineral reactions in wa...
Areas of disproportionately high biogeochemical activity or export relative to surrounding landscape