Bridging Drought Experiment and Modeling: Representing the Differential Sensitivities of Leaf Gas Exchange to Drought
Global climate change is expected to increase drought duration and intensity in certain regions while increasing rainfall in others. The quantitative consequences of increased drought for ecosystems are not easy to predict. Process-based models must be informed by experiments to determine the resili...
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doaj-fc84dd51c29845ec8a79db4b3c0b41752020-11-25T00:03:31ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2019-01-01910.3389/fpls.2018.01965409596Bridging Drought Experiment and Modeling: Representing the Differential Sensitivities of Leaf Gas Exchange to DroughtShuang-Xi Zhou0Shuang-Xi Zhou1I. Colin Prentice2I. Colin Prentice3Belinda E. Medlyn4Belinda E. Medlyn5Department of Biological Sciences, Macquarie University, Sydney, NSW, AustraliaThe New Zealand Institute for Plant and Food Research Ltd., Hawke’s Bay, New ZealandDepartment of Biological Sciences, Macquarie University, Sydney, NSW, AustraliaAXA Chair of Biosphere and Climate Impacts, Grand Challenges in Ecosystems and the Environment and Grantham Institute – Climate Change and the Environment, Department of Life Sciences, Imperial College London, Ascot, United KingdomDepartment of Biological Sciences, Macquarie University, Sydney, NSW, AustraliaHawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, AustraliaGlobal climate change is expected to increase drought duration and intensity in certain regions while increasing rainfall in others. The quantitative consequences of increased drought for ecosystems are not easy to predict. Process-based models must be informed by experiments to determine the resilience of plants and ecosystems from different climates. Here, we demonstrate what and how experimentally derived quantitative information can improve the representation of stomatal and non-stomatal photosynthetic responses to drought in large-scale vegetation models. In particular, we review literature on the answers to four key questions: (1) Which photosynthetic processes are affected under short-term drought? (2) How do the stomatal and non-stomatal responses to short-term drought vary among species originating from different hydro-climates? (3) Do plants acclimate to prolonged water stress, and do mesic and xeric species differ in their degree of acclimation? (4) Does inclusion of experimentally based plant functional type specific stomatal and non-stomatal response functions to drought help Land Surface Models to reproduce key features of ecosystem responses to drought? We highlighted the need for evaluating model representations of the fundamental eco-physiological processes under drought. Taking differential drought sensitivity of different vegetation into account is necessary for Land Surface Models to accurately model drought responses, or the drought impacts on vegetation in drier environments may be over-estimated.https://www.frontiersin.org/article/10.3389/fpls.2018.01965/fullphotosynthesisstomatal and non-stomatal limitationmesophyll conductanceVcmaxJmaxdrought acclimation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Shuang-Xi Zhou Shuang-Xi Zhou I. Colin Prentice I. Colin Prentice Belinda E. Medlyn Belinda E. Medlyn |
spellingShingle |
Shuang-Xi Zhou Shuang-Xi Zhou I. Colin Prentice I. Colin Prentice Belinda E. Medlyn Belinda E. Medlyn Bridging Drought Experiment and Modeling: Representing the Differential Sensitivities of Leaf Gas Exchange to Drought Frontiers in Plant Science photosynthesis stomatal and non-stomatal limitation mesophyll conductance Vcmax Jmax drought acclimation |
author_facet |
Shuang-Xi Zhou Shuang-Xi Zhou I. Colin Prentice I. Colin Prentice Belinda E. Medlyn Belinda E. Medlyn |
author_sort |
Shuang-Xi Zhou |
title |
Bridging Drought Experiment and Modeling: Representing the Differential Sensitivities of Leaf Gas Exchange to Drought |
title_short |
Bridging Drought Experiment and Modeling: Representing the Differential Sensitivities of Leaf Gas Exchange to Drought |
title_full |
Bridging Drought Experiment and Modeling: Representing the Differential Sensitivities of Leaf Gas Exchange to Drought |
title_fullStr |
Bridging Drought Experiment and Modeling: Representing the Differential Sensitivities of Leaf Gas Exchange to Drought |
title_full_unstemmed |
Bridging Drought Experiment and Modeling: Representing the Differential Sensitivities of Leaf Gas Exchange to Drought |
title_sort |
bridging drought experiment and modeling: representing the differential sensitivities of leaf gas exchange to drought |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Plant Science |
issn |
1664-462X |
publishDate |
2019-01-01 |
description |
Global climate change is expected to increase drought duration and intensity in certain regions while increasing rainfall in others. The quantitative consequences of increased drought for ecosystems are not easy to predict. Process-based models must be informed by experiments to determine the resilience of plants and ecosystems from different climates. Here, we demonstrate what and how experimentally derived quantitative information can improve the representation of stomatal and non-stomatal photosynthetic responses to drought in large-scale vegetation models. In particular, we review literature on the answers to four key questions: (1) Which photosynthetic processes are affected under short-term drought? (2) How do the stomatal and non-stomatal responses to short-term drought vary among species originating from different hydro-climates? (3) Do plants acclimate to prolonged water stress, and do mesic and xeric species differ in their degree of acclimation? (4) Does inclusion of experimentally based plant functional type specific stomatal and non-stomatal response functions to drought help Land Surface Models to reproduce key features of ecosystem responses to drought? We highlighted the need for evaluating model representations of the fundamental eco-physiological processes under drought. Taking differential drought sensitivity of different vegetation into account is necessary for Land Surface Models to accurately model drought responses, or the drought impacts on vegetation in drier environments may be over-estimated. |
topic |
photosynthesis stomatal and non-stomatal limitation mesophyll conductance Vcmax Jmax drought acclimation |
url |
https://www.frontiersin.org/article/10.3389/fpls.2018.01965/full |
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