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Critical soil moisture thresholds of plant water stress in terrestrial ecosystems

hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
dc.contributor.authorFU, Zheng
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
dc.contributor.authorCIAIS, Philippe
hal.structure.identifierNASA Goddard Space Flight Center [GSFC]
dc.contributor.authorFELDMAN, Andrew
hal.structure.identifierDepartment of Earth and Environmental Engineering [New York]
dc.contributor.authorGENTINE, Pierre
hal.structure.identifierMathématiques et Informatique Appliquées [MIA Paris-Saclay]
dc.contributor.authorMAKOWSKI, David
hal.structure.identifierDepartment of Life Sciences
dc.contributor.authorPRENTICE, I
hal.structure.identifierDepartment of Biological Systems Engineering
dc.contributor.authorSTOY, Paul
hal.structure.identifierMax Planck Institute for Biogeochemistry [MPI-BGC]
dc.contributor.authorBASTOS, Ana
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorJ.-P., Wigneron
dc.date.accessioned2024-04-08T11:44:29Z
dc.date.available2024-04-08T11:44:29Z
dc.date.issued2022
dc.identifier.issn2375-2548
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195154
dc.description.abstractEnPlant water stress occurs at the point when soil moisture (SM) limits transpiration, defining a critical SM threshold ( crit). Knowledge of the spatial distribution of  crit is crucial for future projections of climate and water resources. Here, we use global eddy covariance observations to quantify  crit and evaporative fraction (EF) regimes. Three canonical variables describe how EF is controlled by SM: the maximum EF (EF max),  crit , and slope (S) between EF and SM. We find systematic differences of these three variables across biomes. Variation in  crit , S, and EF max is mostly explained by soil texture, vapor pressure deficit, and precipitation, respectively, as well as vegetation structure. Dryland ecosystems tend to operate at low  crit and show adaptation to water deficits. The negative relationship between  crit and S indicates that dryland ecosystems minimize  crit through mechanisms of sustained SM extraction and transport by xylem. Our results further suggest an optimal adaptation of local EF-SM response that maximizes growing-season evapotranspiration and photosynthesis.
dc.language.isoen
dc.publisherAmerican Association for the Advancement of Science (AAAS)
dc.rights.urihttp://creativecommons.org/licenses/by-nc/
dc.title.enCritical soil moisture thresholds of plant water stress in terrestrial ecosystems
dc.typeArticle de revue
dc.identifier.doi10.1126/sciadv.abq7827
dc.subject.halPlanète et Univers [physics]
bordeaux.journalScience Advances
bordeaux.pageeabq7827
bordeaux.volume8
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.issue44
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-04050797
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04050797v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Science%20Advances&rft.date=2022&rft.volume=8&rft.issue=44&rft.spage=eabq7827&rft.epage=eabq7827&rft.eissn=2375-2548&rft.issn=2375-2548&rft.au=FU,%20Zheng&CIAIS,%20Philippe&FELDMAN,%20Andrew&GENTINE,%20Pierre&MAKOWSKI,%20David&rft.genre=article


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