Smart tracers are compounds that change under specific conditions. Thus their applications are a bit more specialized than that of general salt (or other) conservative or reactive solutes. In this case, the rezasurin/resorufin approach is used as an example to evaluate stream metabolic activity.
This video is also available with English and Mandarin translations.
Films Produced by Ryan Vachon
This community video was contributed by: Michael Gooseff, Kamini Singha, Jancoba Dorley, Joel Singley, Timothy Covino, and Ricardo Gonzalez-Pinzon.
This material is based upon work supported by the National Science Foundation under Grant Numbers: NSF EAR-1642399, NSF EAR-1642368, NSF EAR-1642402, and NSF EAR-1642403.