Sub-annual variability in historical water source use by Mediterranean riparian trees - Observatoire Hommes-Milieux Vallée du Rhône Access content directly
Reports Year : 2015

Sub-annual variability in historical water source use by Mediterranean riparian trees

Abstract

Our study investigated the seasonal variability in historical water source use of Fraxinus excelsior and Populus nigra. We utilized a new method which combines tree-ring isotopes and isotope modelling to determine how tree water use varied at the sub-annual level over 10 consecutive growing seasons (2000-2010). We conducted tree-ring micro-slicing to produce highly resolved cellulose δ18O records and back calculated the δ18O signature of the source water used for growth of each micro-slice. We compared these results to regional water δ18O signatures to infer seasonal hydrological partitioning. Fraxinus was dependent on non-growing and growing season rainfall from the vadose zone whilst Populus relied on hyporheic and regional groundwater. We observed a convergence in water use of both species from 2007 which is attributed to a decline in phreatic water access to Populus
Fichier principal
Vignette du fichier
20-WEB_Singer_OHMVR_2016.pdf (398.76 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-04549463 , version 1 (17-04-2024)

Licence

Copyright

Identifiers

  • HAL Id : hal-04549463 , version 1

Cite

Christopher Sargeant, Michael Bliss Singer. Sub-annual variability in historical water source use by Mediterranean riparian trees. University of St Andrews; University of California Santa Barbara. 2015. ⟨hal-04549463⟩
2 View
0 Download

Share

Gmail Facebook X LinkedIn More