June 02, 2017
Pragmatic Hydraulic Theory Predicts Stomatal Responses to Climatic Water Deficits
Model validated particularly well against multiple empirical datasets.
The Science
This study introduces a new approach to modeling stomatal function based on trait-based hydraulics.
The Impact
This model will radically simplify, yet improve, Earth system models, once incorporated.
Summary
Earth system models do not simulate stomatal conductance, and hence photosynthesis, correctly. Here, a team from the Next-Generation Ecosystem Experiments (NGEE)–Tropics project introduce a modeling approach that is simple yet mechanistically accurate. The model validated particularly well against multiple empirical datasets. Furthermore, the researchers propose ways this model can be incorporated into Earth system models, thus greatly improving their realism and accuracy.
Principal Investigator
Nate McDowell
Pacific Northwest National Laboratory
[email protected]
Program Manager
Daniel Stover
U.S. Department of Energy, Biological and Environmental Research (SC-33)
Environmental System Science
[email protected]
Funding
Funding was provided by the Next-Generation Ecosystem Experiments (NGEE)–Tropics project of the Office of Biological and Environmental Research, within the U.S. Department of Energy (DOE) Office of Science, and by the National Science Foundation (NSF).
References
Sperry, J. S., Y. Wang, B. T. Wolfe, and D. S. Mackay, et al. "Pragmatic hydraulic theory predicts stomatal responses to climatic water deficits." New Phytologist 212 (3), 577–589 (2016). http://dx.doi.org/10.1111/nph.14059.