Global separation of plant transpiration from groundwater and streamflow

@article{Evaristo2015GlobalSO,
  title={Global separation of plant transpiration from groundwater and streamflow},
  author={Jaivime Evaristo and Scott Jasechko and Jeffrey J. McDonnell},
  journal={Nature},
  year={2015},
  volume={525},
  pages={91-94}
}
Current land surface models assume that groundwater, streamflow and plant transpiration are all sourced and mediated by the same well mixed water reservoir—the soil. However, recent work in Oregon and Mexico has shown evidence of ecohydrological separation, whereby different subsurface compartmentalized pools of water supply either plant transpiration fluxes or the combined fluxes of groundwater and streamflow. These findings have not yet been widely tested. Here we use hydrogen and oxygen… 
Characterizing the Fluxes and Age Distribution of Soil Water, Plant Water, and Deep Percolation in a Model Tropical Ecosystem
Recent field observations indicate that in many forest ecosystems, plants use water that may be isotopically distinct from soil water that ultimately contributes to streamflow. Such an assertion has
Hydrology: The diversified economics of soil water
  • G. Bowen
  • Environmental Science, Medicine
    Nature
  • 2015
TLDR
Building on prior but limited studies, Jaivime Evaristo et al. have assembled a dataset of hydrogen and oxygen isotopes — drawn from widely distributed sites — and show that ecohydrological separation is the rule.
Relative contribution of groundwater to plant transpiration estimated with stable isotopes
TLDR
The connectivity between groundwater pools and plant water may be quantitatively larger and more widespread than reported by recent global estimations based on isotopic averaged values, and Earth System Models should account for the feedbacks between transpiration and groundwater recharge.
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