Concepts

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

Geographic patterns in biodiversity and chemical diversity across latitudinal and environmental gradients

The association of uranium with different solid-phase mineral forms that influences uranium mobility between solid and water phases