Modelled hydraulic redistribution by sunflower (Helianthus annuus L.) matches observed data only after including night-time transpiration
Neumann, Rebecca B.
Cardon, Zoe G.
Rockwell, Fulton E.
Zwieniecki, Maciej A.
Holbrook, N. Michele
MetadataShow full item record
KeywordHydraulic redistribution; Hydraulic lift; Helianthus annuus; Sunflower; Nighttime transpiration; Soil texture
The movement of water from moist to dry soil layers through the root systems of plants, referred to as hydraulic redistribution (HR), occurs throughout the world and is thought to influence carbon and water budgets and ecosystem functioning. The realized hydrologic, biogeochemical, and ecological consequences of HR depend on the amount of redistributed water, while the ability to assess these impacts requires models that correctly capture HR magnitude and timing. Using several soil types and two eco-types of sunflower (Helianthus annuus L.) in split-pot experiments, we examined how well the widely used HR modeling formulation developed by Ryel et al. (2002) matched experimental determination of HR across a range of water potential driving gradients. H. annuus carries out extensive nighttime transpiration, and though over the last decade it has become more widely recognized that nighttime transpiration occurs in multiple species and many ecosystems, the original Ryel et al. (2002) formulation does not include the effect of nighttime transpiration on HR. We developed and added a representation of nighttime transpiration into the formulation, and only then was the model able to capture the dynamics and magnitude of HR we observed as soils dried and nighttime stomatal behavior changed, both influencing HR.
Author Posting. © The Author(s), 2013. This is the author's version of the work. It is posted here by permission of John Wiley & Sons for personal use, not for redistribution. The definitive version was published in Plant, Cell & Environment 37 (2014): 899-910, doi:10.1111/pce.12206.
Suggested CitationPreprint: Neumann, Rebecca B., Cardon, Zoe G., Teshera-Levye, Jennifer, Rockwell, Fulton E., Zwieniecki, Maciej A., Holbrook, N. Michele, "Modelled hydraulic redistribution by sunflower (Helianthus annuus L.) matches observed data only after including night-time transpiration", 2013-09, https://doi.org/10.1111/pce.12206, https://hdl.handle.net/1912/6724
Showing items related by title, author, creator and subject.
Validation of the remotely sensed nighttime sea surface temperature in the shallow waters at the Dongsha Atoll Pan, Xiaoju; Wong, George T. F.; DeCarlo, Thomas M.; Tai, Jen-Hua; Cohen, Anne L. (Terrestrial, Atmospheric and Oceanic Sciences, 2017-06)Fine scale temperature structures, which are commonly found in the top few meters of shallow water columns, may result in deviations of the remotely sensed night-time sea surface temperatures (SST) by the MODIS-Aqua sensor ...
Application of DMSP/OLS nighttime light images : a meta-analysis and a systematic literature review Huang, Qingxu; Yang, Xi; Gao, Bin; Yang, Yang; Zhao, Yuanyuan (MDPI AG, 2014-07-25)Since the release of the digital archives of Defense Meteorological Satellite Program Operational Line Scanner (DMSP/OLS) nighttime light data in 1992, a variety of datasets based on this database have been produced and ...
Short-term variability in nighttime scattering strength levels at one site in the eastern Algero-Provençal Basin Doutt, James A. (Woods Hole Oceanographic Institution, 1986-03)A sequence of nine nighttime, broadband volume scattering strength measurements obtained in 1973 over a period of approximately one hour was used to study the short-term variability of scattering strength in 100 Hz bands ...