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Hydraulic redistribution of soil water in two old-growth coniferous forests: quantifying patterns and controls.

Publication ,  Journal Article
Warren, JM; Meinzer, FC; Brooks, JR; Domec, J-C; Coulombe, R
Published in: The New phytologist
January 2007

Although hydraulic redistribution of soil water (HR) by roots is a widespread phenomenon, the processes governing spatial and temporal patterns of HR are not well understood. We incorporated soil/plant biophysical properties into a simple model based on Darcy's law to predict seasonal trajectories of HR. We investigated the spatial and temporal variability of HR across multiple years in two old-growth coniferous forest ecosystems with contrasting species and moisture regimes by measurement of soil water content (theta) and water potential (Psi) throughout the upper soil profile, root distribution and conductivity, and relevant climate variables. Large HR variability within sites (0-0.5 mm d(-1)) was attributed to spatial patterns of roots, soil moisture and depletion. HR accounted for 3-9% of estimated total site water depletion seasonally, peaking at 0.16 mm d(-1) (ponderosa pine; Pinus ponderosa) or 0.30 mm d(-1) (Douglas-fir; Pseudotsuga menziesii), then declining as modeled pathway conductance dropped with increasing root cavitation. While HR can vary tremendously within a site, among years and among ecosystems, this variability can be explained by natural variability in Psi gradients and seasonal courses of root conductivity.

Duke Scholars

Published In

The New phytologist

DOI

EISSN

1469-8137

ISSN

1469-8137

Publication Date

January 2007

Volume

173

Issue

4

Start / End Page

753 / 765

Related Subject Headings

  • Water
  • Washington
  • Trees
  • Soil
  • Seasons
  • Plant Transpiration
  • Plant Roots
  • Plant Biology & Botany
  • Oregon
  • Ecosystem
 

Citation

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ICMJE
MLA
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Warren, J. M., Meinzer, F. C., Brooks, J. R., Domec, J.-C., & Coulombe, R. (2007). Hydraulic redistribution of soil water in two old-growth coniferous forests: quantifying patterns and controls. The New Phytologist, 173(4), 753–765. https://doi.org/10.1111/j.1469-8137.2006.01963.x
Warren, Jeffrey M., Frederick C. Meinzer, J Renée Brooks, Jean-Christophe Domec, and Rob Coulombe. “Hydraulic redistribution of soil water in two old-growth coniferous forests: quantifying patterns and controls.The New Phytologist 173, no. 4 (January 2007): 753–65. https://doi.org/10.1111/j.1469-8137.2006.01963.x.
Warren JM, Meinzer FC, Brooks JR, Domec J-C, Coulombe R. Hydraulic redistribution of soil water in two old-growth coniferous forests: quantifying patterns and controls. The New phytologist. 2007 Jan;173(4):753–65.
Warren, Jeffrey M., et al. “Hydraulic redistribution of soil water in two old-growth coniferous forests: quantifying patterns and controls.The New Phytologist, vol. 173, no. 4, Jan. 2007, pp. 753–65. Epmc, doi:10.1111/j.1469-8137.2006.01963.x.
Warren JM, Meinzer FC, Brooks JR, Domec J-C, Coulombe R. Hydraulic redistribution of soil water in two old-growth coniferous forests: quantifying patterns and controls. The New phytologist. 2007 Jan;173(4):753–765.
Journal cover image

Published In

The New phytologist

DOI

EISSN

1469-8137

ISSN

1469-8137

Publication Date

January 2007

Volume

173

Issue

4

Start / End Page

753 / 765

Related Subject Headings

  • Water
  • Washington
  • Trees
  • Soil
  • Seasons
  • Plant Transpiration
  • Plant Roots
  • Plant Biology & Botany
  • Oregon
  • Ecosystem