Sökning: onr:"swepub:oai:lup.lub.lu.se:ec59db5f-5668-4494-b132-8117a32906fc" >
A Dynamic Model for...
A Dynamic Model for Strategies and Dynamics of Plant Water-Potential Regulation Under Drought Conditions
-
- Papastefanou, Phillip (författare)
- Technical University of Munich
-
- Zang, Christian S. (författare)
- Technical University of Munich
-
- Pugh, Thomas A.M. (författare)
- Birmingham Institute of Forest Research,University of Birmingham
-
visa fler...
-
- Liu, Daijun (författare)
- University of Birmingham
-
- Grams, Thorsten E.E. (författare)
- Technical University of Munich
-
- Hickler, Thomas (författare)
- Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science,Goethe University,Senckenberg Biodiversity and Climate Research Centre
-
- Rammig, Anja (författare)
- Technical University of Munich
-
visa färre...
-
(creator_code:org_t)
- 2020-04-28
- 2020
- Engelska.
-
Ingår i: Frontiers in Plant Science. - : Frontiers Media SA. - 1664-462X. ; 11
- Relaterad länk:
-
http://dx.doi.org/10... (free)
-
visa fler...
-
https://www.frontier...
-
https://lup.lub.lu.s...
-
https://doi.org/10.3...
-
visa färre...
Abstract
Ämnesord
Stäng
- Vegetation responds to drought through a complex interplay of plant hydraulic mechanisms, posing challenges for model development and parameterization. We present a mathematical model that describes the dynamics of leaf water-potential over time while considering different strategies by which plant species regulate their water-potentials. The model has two parameters: the parameter λ describing the adjustment of the leaf water potential to changes in soil water potential, and the parameter Δψww describing the typical ‘well-watered’ leaf water potentials at non-stressed (near-zero) levels of soil water potential. Our model was tested and calibrated on 110 time-series datasets containing the leaf- and soil water potentials of 66 species under drought and non-drought conditions. Our model successfully reproduces the measured leaf water potentials over time based on three different regulation strategies under drought. We found that three parameter sets derived from the measurement data reproduced the dynamics of 53% of an drought dataset, and 52% of a control dataset [root mean square error (RMSE) < 0.5 MPa)]. We conclude that, instead of quantifying water-potential-regulation of different plant species by complex modeling approaches, a small set of parameters may be sufficient to describe the water potential regulation behavior for large-scale modeling. Thus, our approach paves the way for a parsimonious representation of the full spectrum of plant hydraulic responses to drought in dynamic vegetation models.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Nyckelord
- climate change
- drought
- isohydricity
- leaf water potential
- plant-hydraulics
- water stress
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
Hitta via bibliotek
Till lärosätets databas