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    Author(s): Jeffrey M. Warren; J. Renée Brooks; Maria I. Dragila; Frederick C. Meinzer
    Date: 2011
    Source: Oecologia. 166: 899-911
    Publication Series: Scientific Journal (JRNL)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (1.21 MB)

    Description

    Nocturnal increases in water potential and water content in the upper soil profile are often attributed to root water efflux, a process termed hydraulic redistribution (HR). However, unsaturated liquid or vapor flux of water between soil layers independent of roots also contributes to the daily recovery in water content, confounding efforts to determine the actual magnitude of HR. We estimated liquid and vapor soil water fluxes and their impacts on quantifying HR in a seasonally dry ponderosa pine (Pinus ponderosa) forest by applying existing datasets of water potential, water content, and temperature to soil water transport equations.

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    Citation

    Warren, Jeffrey M.; Brooks, J. Renée; Dragila, Maria I.; Meinzer, Frederick C. 2011. In situ separation of root hydraulic redistribution of soil water from liquid and vapor transport. Oecologia. 166: 899-911.

    Keywords

    diffusivity, hydraulic lift, ponderosa pine, hydraulic conductivity, vapor flow

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