Articles | Volume 23, issue 4
https://doi.org/10.5194/hess-23-2129-2019
https://doi.org/10.5194/hess-23-2129-2019
Research article
 | 
26 Apr 2019
Research article |  | 26 Apr 2019

Unexplained hydrogen isotope offsets complicate the identification and quantification of tree water sources in a riparian forest

Adrià Barbeta, Sam P. Jones, Laura Clavé, Lisa Wingate, Teresa E. Gimeno, Bastien Fréjaville, Steve Wohl, and Jérôme Ogée

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Hydrogen isotope fractionation affects the identification and quantification of tree water sources in a riparian forest
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Revised manuscript not accepted
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Cited articles

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Short summary
Plant water sources of a beech riparian forest were monitored using stable isotopes. Isotopic fractionation during root water uptake is usually neglected but may be more common than previously accepted. Xylem water was always more depleted in δ2H than all sources considered, suggesting isotopic discrimination during water uptake or within plant tissues. Thus, the identification and quantification of tree water sources was affected. Still, oxygen isotopes were a good tracer of plant source water.