Mechanisms of woody-plant mortality under rising drought, CO2 and vapour pressure deficit

McDowell, Nate G. and Sapes, Gerard and Pivovaroff, Alexandria and Adams, Henry D. and Allen, Craig D. and Anderegg, William R. L. and Arend, Matthias and Breshears, David D. and Brodribb, Tim and Choat, Brendan and Cochard, Herve and De Caceres, Miquel and De Kauwe, Martin G. and Grossiord, Charlotte and Hammond, William M. and Hartmann, Henrik and Hoch, Günter and Kahmen, Ansgar and Klein, Tamir and Mackay, Scott D. and Mantova, Marylou and Martínez-Vilalta, Jordi and Medlyn, Belinda E. and Mencuccini, Maurizio and Nardini, Andrea and Oliveira, Rafael S. and Sala, Anna and Tissue, David T. and Torres-Ruiz, José M. and Trowbridge, Amy M. and Trugman, Anna T. and Wiley, Erin and Xu, Chonggang. (2022) Mechanisms of woody-plant mortality under rising drought, CO2 and vapour pressure deficit. Nature Reviews Earth & Environment, 3 (5). pp. 294-308.

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Official URL: https://edoc.unibas.ch/89417/

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Drought-associated woody-plant mortality has been increasing in most regions with multi-decadal records and is projected to increase in the future, impacting terrestrial climate forcing, biodiversity and resource availability. The mechanisms underlying such mortality, however, are debated, owing to complex interactions between the drivers and the processes. In this Review, we synthesize knowledge of drought-related tree mortality under a warming and drying atmosphere with rising atmospheric CO2. Drought-associated mortality results from water and carbon depletion and declines in their fluxes relative to demand by living tissues. These pools and fluxes are interdependent and underlay plant defences against biotic agents. Death via failure to maintain a positive water balance is particularly dependent on soil-to-root conductance, capacitance, vulnerability to hydraulic failure, cuticular water losses and dehydration tolerance, all of which could be exacerbated by reduced carbon supply rates to support cellular survival or the carbon starvation process. The depletion of plant water and carbon pools is accelerated under rising vapour pressure deficit, but increasing CO2 can mitigate these impacts. Advancing knowledge and reducing predictive uncertainties requires the integration of carbon, water and defensive processes, and the use of a range of experimental and modelling approaches.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Integrative Biologie > Physiological Plant Ecology (Kahmen)
UniBasel Contributors:Kahmen, Ansgar and Hoch, Günter
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:06 Sep 2022 11:52
Deposited On:06 Sep 2022 11:52

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