Fueling Diversity in the Subsurface: Composition and Age of Dissolved Organic Matter in the Critical Zone

Surface ecosystems are rapidly changing on a global scale and it is important to understand how this influences aquifers in the subsurface, as groundwater quality is a major concern for future generations. Dissolved organic matter (DOM) contains molecular and isotopic signals from surface-derived inputs and from the biotic and abiotic subsurface environment and is therefore ideal to study the connectivity between both environments. Therefore, we...