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Bridging drought experiment and modeling: Representing the differential sensitivities of leaf gas exchange to drought
Title: | Bridging drought experiment and modeling: Representing the differential sensitivities of leaf gas exchange to drought |
Authors: | Zhou, S-X Prentice, IC Medlyn, BE |
Item Type: | Journal Article |
Abstract: | 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. |
Issue Date: | 15-Jan-2019 |
Date of Acceptance: | 18-Dec-2018 |
URI: | http://hdl.handle.net/10044/1/66205 |
DOI: | https://dx.doi.org/10.3389/fpls.2018.01965 |
ISSN: | 1664-462X |
Publisher: | Frontiers Media |
Journal / Book Title: | Frontiers in Plant Science |
Volume: | 9 |
Copyright Statement: | © 2019 Zhou, Prentice and Medlyn. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY - https://creativecommons.org/licenses/by/4.0/). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
Sponsor/Funder: | AXA Research Fund Commission of the European Communities |
Funder's Grant Number: | AXA Chair Programme in Biosphere and Climate Impacts 787203 |
Keywords: | Science & Technology Life Sciences & Biomedicine Plant Sciences photosynthesis stomatal and non-stomatal limitation mesophyll conductance V-cmax J(max) drought acclimation flux measurement land surface model TERM WATER-STRESS OPTIMAL STOMATAL CONDUCTANCE DECREASED RUBISCO ACTIVITY MESOPHYLL CONDUCTANCE QUERCUS-ILEX HYDRAULIC TRAITS TREE MORTALITY CLIMATE-CHANGE PHOTOSYNTHETIC CAPACITY NONSTOMATAL LIMITATIONS |
Publication Status: | Published |
Article Number: | 1965 |
Online Publication Date: | 2019-01-15 |
Appears in Collections: | Department of Life Sciences Faculty of Natural Sciences |