Differential summer water use by Pinus edulis and Juniperus osteosperma reflects contrasting hydraulic characteristics.

  title={Differential summer water use by Pinus edulis and Juniperus osteosperma reflects contrasting hydraulic characteristics.},
  author={Adam G West and Kevin R. Hultine and Timothy L Jackson and James R Ehleringer},
  journal={Tree physiology},
  volume={27 12},
Previous studies of pinyon-juniper woodlands show that Pinus edulis Engelm. makes better use of soil water from summer precipitation pulses than does co-occurring Juniperus osteosperma (Torr.) Little. To investigate the basis of this difference, we examined seasonal variation in cavitation and hydraulic conductance. Pinus edulis remained isohydric over the growing season. Minimum water potentials never fell below -2.3 MPa, and the extent of xylem cavitation remained near constant during the dry… CONTINUE READING


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