Hydraulic lift in a neotropical savanna

M. Z. Moreira, F. G. Scholz, S. J. Bucci, Leonel Sternberg, G. Goldstein, F. C. Meinzer, A. C. Franco

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

1. We report hydraulic lift in the savanna vegetation of central Brazil (Cerrado). Both heat-pulse measurements and isotopic (deuterium) labelling were used to determine whether hydraulic lift occurred in two common species, and whether neighbouring small shrubs and trees were utilizing this water. 2. Both techniques showed water uptake by tap-roots and reverse flow of water in lateral roots. Roots transferred hydraulically lifted water to the soil, and small shrubs and trees neighbouring the labelled individuals were labelled by deuterated water. 3. Isotopic mass-balance equations and sap-flow measurements showed that water taken up by the central tap-root in each individual constituted only a small percentage of total flux of water through the treated plants. Mass-balance equations also indicated that small shrubs and trees neighbouring the treated plants utilized only a few thousandths of a per cent of the label. 4. The small proportion of water uptake by the tap-root of these two species may be limiting hydraulic lift in this system, unless sinker roots descending from lateral roots contribute to hydraulic lift.

Original languageEnglish
Pages (from-to)573-581
Number of pages9
JournalFunctional Ecology
Volume17
Issue number5
DOIs
StatePublished - Oct 1 2003

Fingerprint

savanna
savannas
fluid mechanics
tap roots
hydraulics
shrubs
water
water uptake
shrub
hydraulic systems
mass balance
deuterium
sap flow
cerrado
water flow
flow measurement
heat
Brazil
vegetation
soil

Keywords

  • Deuterium labelling
  • Heat pulse
  • Hydraulic lift
  • Neotropical savanna
  • Soil water redistribution

ASJC Scopus subject areas

  • Ecology

Cite this

Moreira, M. Z., Scholz, F. G., Bucci, S. J., Sternberg, L., Goldstein, G., Meinzer, F. C., & Franco, A. C. (2003). Hydraulic lift in a neotropical savanna. Functional Ecology, 17(5), 573-581. https://doi.org/10.1046/j.1365-2435.2003.00770.x

Hydraulic lift in a neotropical savanna. / Moreira, M. Z.; Scholz, F. G.; Bucci, S. J.; Sternberg, Leonel; Goldstein, G.; Meinzer, F. C.; Franco, A. C.

In: Functional Ecology, Vol. 17, No. 5, 01.10.2003, p. 573-581.

Research output: Contribution to journalArticle

Moreira, MZ, Scholz, FG, Bucci, SJ, Sternberg, L, Goldstein, G, Meinzer, FC & Franco, AC 2003, 'Hydraulic lift in a neotropical savanna', Functional Ecology, vol. 17, no. 5, pp. 573-581. https://doi.org/10.1046/j.1365-2435.2003.00770.x
Moreira MZ, Scholz FG, Bucci SJ, Sternberg L, Goldstein G, Meinzer FC et al. Hydraulic lift in a neotropical savanna. Functional Ecology. 2003 Oct 1;17(5):573-581. https://doi.org/10.1046/j.1365-2435.2003.00770.x
Moreira, M. Z. ; Scholz, F. G. ; Bucci, S. J. ; Sternberg, Leonel ; Goldstein, G. ; Meinzer, F. C. ; Franco, A. C. / Hydraulic lift in a neotropical savanna. In: Functional Ecology. 2003 ; Vol. 17, No. 5. pp. 573-581.
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