Isotopic offsets between bulk plant water and its  sources are larger in cool and wet environments

de la Casa, Javier; Barbeta, Adrià; Rodríguez-Uña, Asun; Wingate, Lisa; Ogée, Jérôme; Gimeno, Teresa E.

doi:https://doi.org/10.5194/hess-26-4125-2022

Articles | Volume 26, issue 15

https://doi.org/10.5194/hess-26-4125-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/hess-26-4125-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 26, issue 15

Research article

|

08 Aug 2022

Research article |

| 08 Aug 2022

Isotopic offsets between bulk plant water and its sources are larger in cool and wet environments

Javier de la Casa, Adrià Barbeta, Asun Rodríguez-Uña, Lisa Wingate, Jérôme Ogée, and Teresa E. Gimeno

Supplement

https://doi.org/10.5194/hess-26-4125-2022-supplement

Data sets

Global dataset of stable isotopes in plant water and its sources J. de la Casa, A. Barbeta, A. Rodriguez-Uña, L. Wingate, J. Ogée and T. E. Gimeno https://doi.org/10.6084/m9.figshare.20079434.v1

Data: Water stable isotope signature of soil and xylem samples under different land use systems L. Schwendenmann and F. Jost https://doi.org/10.17608/k6.auckland.8067338.v1

Data: H and O isotope signatures of soil and xylem samples, cacao agroforest L. Schwendenmann https://doi.org/10.17608/k6.auckland.8067449.v1

ERA5 monthly averaged data on single levels from 1979 to present H. Hersbach, B. Bell, P. Berrisford, G. Biavati, A. Horányi, J. Muñoz Sabater, J. Nicolas, C. Peubey, R. Radu, I. Rozum, D. Schepers, A. Simmons, C.Soci, D. Dee, and J.-N. Thépaut: https://doi.org/10.24381/cds.f17050d7

Short summary

Recently, studies have been reporting mismatches in the water isotopic composition of plants and soils. In this work, we reviewed worldwide isotopic composition data of field and laboratory studies to see if the mismatch is generalised, and we found it to be true. This contradicts theoretical expectations and may underlie an non-described phenomenon that should be forward investigated and implemented in ecohydrological models to avoid erroneous estimations of water sources used by vegetation.