Our research focuses on the interactions between climate, vegetation and geology on freshwater resources across different temporal and spatial scales. Specifically, we work to elucidate the biological and physical feedback mechanisms that influence hydrogeochemical conditions across ecosystems.  To accomplish this task we collect and utilize extensive field datasets (spanning 1-30 years), analyze natural tracers (isotopes and bulk geochemistry), examine physical parameters (e.g., groundwater and surface water le vels, sap flow and soil mositure) and apply hydrogeochemical models to investigate groundwater-surface water interactions, examine ecohydrologic drivers of landscape patterns and quantify the role of vegetation in governing weathering processes.