Hydraulic lift and its influence on the water content of the rhizosphere: an example from sugar maple, Acer saccharum

@article{Emerman2004HydraulicLA,
  title={Hydraulic lift and its influence on the water content of the rhizosphere: an example from sugar maple, Acer saccharum},
  author={Steven H. Emerman and Todd E. Dawson},
  journal={Oecologia},
  year={2004},
  volume={108},
  pages={273-278}
}
Hydraulic lift, the transport of water from deep in the soil through plant root systems into the drier upper soil layers, has been demonstrated in several woody plant species. Here the volume of water involved in hydraulic lift by a mature sugar maple tree is estimated. Twenty-four intact soil cores were collected from the vicinity of a sugar maple tree at the same positions at which thermocouple psychrometers had been placed. Desorption measurements were made on the soil cores and the data… 
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TLDR
Hydraulic lift need not only occur in arid or semi-arid environments where chronic water deficits prevail, but can be important in relatively mesic environments when subjected to periodic soil water deficits, that plants neighboring trees which conduct hydraulic lift can use a significant proportion of this water source, and that the HLW source can effectively ameliorate the influence of drought on the performance and growth of neighboring vegetation.
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