We put together some material for online teaching that spans from technical aspects to hydrological content for classes. If interested, then look at the EGU HS blog post with several links that provide lots of information. Please add more resources to this post by using the commenting function.
A recent paper is the result of a collaboration between James Knighton and the VeWa Team, in which we looked into the effect of different storage and mixing assumptions within the tree for the simulation of xylem stable isotope ratios in the tracer-aided hydrological model EcH2O‐iso. Usually, there is no tree water storage (and mixing) considered in hydrological models, but we showed that adding a storage and assuming either piston flow or fully mixed conditions makes a difference for the model performance. New isotope data sets of higher sampling frequencies will allow in future studies to further investigate the storage and mixing of tree water and its potential effects on xylem water sampling and the interpretation of uptake depths comparing isotope ratios of xylem and soil water. You can find Jame's paper here and if you do not have access to Ecohydrology, please contact me for a copy of the paper.