In situ separation of root hydraulic redistribution of soil water from liquid and vapor transport

Jeffrey Warren; J. Renée Brooks; Maria I. Dragila; Frederick Meinzer

Treesearch

In situ separation of root hydraulic redistribution of soil water from liquid and vapor transport

Formally Refereed

Authors:

Jeffrey Warren, J. Renée Brooks, Maria I. Dragila, Frederick Meinzer

Year:

2011

Type:

Scientific Journal

Station:

Pacific Northwest Research Station

Source:

Oecologia. 166: 899-911

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Abstract

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.

Keywords

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

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.