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Release of Oregon white oak from overtopping Douglas-fir: effects on soil water and microclimate.

Author(s):

W.D. Devine
C.A. Harrington

Year:

2007

Publication type:

Scientific Journal (JRNL)

Primary Station(s):

Pacific Northwest Research Station

Source:

Northwest Science. 81(2): 112-124

Description

Many former Oregon white oak woodland and savanna stands in the coastal Pacific Northwest have been invaded and subsequently overtopped by Douglas-fir during the past century. We examined soil water and microclimate conditions near overtopped oak trees and near oak trees that had been released from Douglas-fir. In each of the three study years, volumetric soil water content declined from ~25 percent to ~10 percent during the early-to-mid growing season near all trees, but this decline was delayed approximately 1 month in the released condition. Throughfall from May through July was increased by release, particularly during light rain events when Douglas-fir crowns intercepted a substantial fraction of total precipitation. Release from Douglas-fir also increased soil temperature, maximum air temperature, and maximum vapor pressure deficit.

Citation

Devine, W.D.; Harrington, C.A. 2007. Release of Oregon white oak from overtopping Douglas-fir: effects on soil water and microclimate. Northwest Science. 81(2): 112-124

Publication Notes

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https://www.fs.usda.gov/treesearch/pubs/29662