TY - JOUR
T1 - Mechanisms of woody-plant mortality under rising drought, CO2 and vapour pressure deficit
AU - McDowell, Nate G
AU - Sapes, Gerard
AU - Pivovaroff, Alexandria
AU - Adams, Henry D
AU - Allen, Craig D
AU - Anderegg, William R. L
AU - Arend, Matthias
AU - Breshears, David D
AU - Brodribb, Tim
AU - Choat, Brendan
AU - Cochard, Herve
AU - De Caceres, Miquel
AU - De Kauwe, Martin G
AU - Grossiord, Charlotte
AU - Hammond, William M
AU - Hartmann, Henrik
AU - Hoch, Gunter
AU - Kahmen, Ansgar
AU - Klein, Tamir
AU - Mackay, D. Scott
AU - Mantova, Marylou
AU - Martinez-Vilalta, Jordi
AU - Medlyn, Belinda E
AU - Mencuccini, Maurizio
AU - Nardini, Andrea
AU - Oliveira, Rafael S
AU - Sala, Anna
AU - Tissue, David T
AU - Torres-Ruiz, Jose M
AU - Trowbridge, Amy M
AU - Trugman, Anna T
AU - Wiley, Erin
AU - Xu, Chonggang
N1 - Publisher Copyright: © 2022, This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.
PY - 2022/5
Y1 - 2022/5
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85126847182&partnerID=8YFLogxK
U2 - https://doi.org/10.1038/s43017-022-00272-1
DO - https://doi.org/10.1038/s43017-022-00272-1
M3 - مقالة مرجعية
SN - 2662-138X
VL - 3
SP - 294
EP - 308
JO - Nature reviews. Earth & environment
JF - Nature reviews. Earth & environment
IS - 5
ER -