Grant, Stanley B.Gomez-Velez, Jesus D.Ghisalberti, Marco2019-09-172019-09-172018-090043-1397http://hdl.handle.net/10919/93730New experimental techniques are allowing, for the first time, direct visualization of mass and momentum transport across the sediment-water interface in streams. These experimental insights are catalyzing a renaissance in our understanding of the role stream turbulence plays in a host of critical ecosystem services, including nutrient cycling. In this commentary, we briefly review the nature of stream turbulence and its role in hyporheic exchange and nutrient cycling in streams. A simple process-based model, borrowed from biochemical engineering, provides the link between empirical relationships for grain-scale turbulent mixing and nutrient processing at reach, catchment, continental, and global scales.application/pdfenCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 InternationalstreamsTurbulencenutrientshyporheicbiogeochemistrysedimentArticle - Refereedhttps://doi.org/10.1029/2018WR0230785491944-7973