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Pacific Southwest Research Station

 
Pacific Southwest
Research Station

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Research Notes

Title: Diurnal fluctuation in moisture content of ponderosa pine and whiteleaf manzanita leaves

Author: Philpot, Charles W.

Date: 1965

Source: Res. Note PSW-RN-067. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 7 p

Station ID: RN-PSW-066

Description: Leaves of ponderosa pine and whiteleaf manzanita were sampled for moisture content during three 24-hour periods--one in the summer of 1963, and two in the summer of 1964. There was a diurnal fluctuation in the leaf moisture content which was highest at night and at a minimum some time during the day. The diurnal range in moisture content decreased as the summer progressed. Two minimums, one in the morning and one in the afternoon, occurred in both species. Inactivity of wildfires at night may be due in part to increased moisture in living fuel.

Keywords: Arctostaphylos viscida; California; coniferous forests; fire behavior; fuel moisture; Great Basin and Pacific Slope States; leaves; live fuels; Manzanita; moisture; North America; Pinus ponderosa; second growth forests; transpiration; USA

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Citation

Philpot, Charles W. 1965. Diurnal fluctuation in moisture content of ponderosa pine and whiteleaf manzanita leaves. Res. Note PSW-RN-067. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 7 p.

Last Modified: Aug 29, 2016 10:17:16 AM