Transpiration by dryland oaks: studies in the south-western United States and Northern Israel |
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Authors: | Peter F Ffolliott Gerald J Gottfried Yehezkel Cohen Gabriel Schiller |
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Institution: | a School of Renewable Natural Resources, College of Agriculture, University of Arizona, 325 Biological Sciences, East Bldg, P.O. Box 210043, Tucson, AZ 85721 0043, USA;b Rocky Mountain Research Station, USDA Forest Service, Phoenix, AZ, USA;c Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel |
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Abstract: | Increased understanding of transpiration by dryland oaks in the woodlands of the south-western United States and northern Israel has been obtained from studies in the two countries. Transpiration was estimated in both studies by the heat pulse velocity (HPV) method in stands of Quercus emoryi, a drought-deciduous species growing in the south-western United States, and stands supporting Q. ithaburensis, a deciduous oak, and Q. calliprinos, an evergreen oak, in northern Israel. Estimates of daily transpiration rates by individual trees and annual transpiration amounts on a stand basis indicate that depending on the species and stand structure, 45–80% of the precipitation inputs to the stands sampled are represented by transpiration component of the respective hydrologic cycles. |
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Keywords: | Dryland oaks Quercus Transpiration Water use Sap flow Heat pulse velocity method |
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