Plant water relations of five obligate ripar-ian species were studied along California's North Fork Kings River. Diurnal stomatal conductance, transpi-ration, and xylem pressure potentials were measured throughout the 1986 growing season and in mid-season in 1987. Patterns were similar for all species although absolute values varied considerably. Maximum stomatal conductance occurred early in the day and season during favorable environmental conditions and decreased as air temperature and the vapor pressure difference between the leaf and air increased. Maximum transpiration rates occurred in mid-morning and mid-summer resulting in estimated daily water losses per unit sunlit leaf area of 163-328 mol H2O m-2. Predawn xylem pressure poten-tials remained high in 1986 when streamflows averaged 1.41 m3/s (50 cfs), however they were notably lower in 1987 at 0.7 m3/s (25 cfs).
Biological diversity; North fork King's River; Range management; Revegetation; Riparian habitat; Riparian systems; Stomatal conductance; Stream diversion; Stream flows; Threatened and endangered species; Trees; Xylem pressure potentials
Desert Ecology | Environmental Health and Protection | Environmental Monitoring | Fresh Water Studies | Plant Biology | Systems Biology | Terrestrial and Aquatic Ecology
Nachlinger, J. L.,
Smith, S. D.,
Risser, R. J.
Riparian plant water relations along the north fork of the Kings River, California.
Proceedings of the California Riparian Systems Conference
US Forest Service.
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