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Hydraulic Redistribution by a Dominant, Warm-Desert Phreatophyte: Seasonal Patterns and Response to Precipitation Pulses

Citation

Hultine, Kevin R, Scott, Russell L, Cable, William L, Goodrich, David C, and Williams, David G, Hydraulic Redistribution by a Dominant, Warm-Desert Phreatophyte: Seasonal Patterns and Response to Precipitation Pulses: .

Summary

1. Hydraulic redistribution may have important consequences for ecosystem water balance where plant root systems span large gradients in soil water potential. To assess seasonal patterns of hydraulic redistribution, we measured the direction and rate of sap flow in tap-roots, lateral roots and main stems of three mature Prosopis velutina Woot. trees occurring on a floodplain terrace in semiarid south-eastern Arizona, USA. Sap-flow measurements on two of the trees were initiated before the end of the winter dormancy period, prior to leaf flush. 2 Despite the absence of crown transpiration during the dormant season, sap flow was detected in lateral roots and tap-roots of P. velutina. Reverse flow (away from the stem) in the lateral root [...]

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  • Upper Colorado River Basin

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From Source - Mendeley RIS Export <br> On - Wed Sep 19 08:08:31 MDT 2012

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Title Citation Hydraulic Redistribution by a Dominant, Warm-Desert Phreatophyte: Seasonal Patterns and Response to Precipitation Pulses

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