Figure 2
From: Origin and hydrodynamics of xylem sap in tree stems, and relationship to root uptake of soil water
Changes in sap δD values (‰) in sapwood, intermediate wood (the sapwood–heartwood boundary), and heartwood of sugi trees (n = 2) in the D2O tracer test conducted at the Abiko site from 2 July to 2 December 2019. (a) South side of sugi tree S1, (b) north side of sugi tree S1, (c) south side of sugi tree S2, (d) north side of sugi tree S2. B.G. is the background level of δD values (‰) in xylem sap collected on 2 July before the tracer test started.
