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Functional diversity reduces the risk of hydraulic failure in tree mixtures through hydraulic disconnection

hal.structure.identifierEcologie des Forêts Méditerranéennes [URFM]
dc.contributor.authorMORENO, Myriam
hal.structure.identifierEcologie des Forêts Méditerranéennes [URFM]
dc.contributor.authorSIMIONI, Guillaume
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
dc.contributor.authorCOCHARD, Hervé
hal.structure.identifierEnvironnement Méditerranéen et Modélisation des Agro-Hydrosystèmes [EMMAH]
dc.contributor.authorDOUSSAN, Claude
hal.structure.identifierEcologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes [UMR Eco&Sols]
dc.contributor.authorGUILLEMOT, Joannès
hal.structure.identifierEcologie des Forêts Méditerranéennes [URFM]
dc.contributor.authorDECARSIN, Renaud
hal.structure.identifierEcologie des Forêts Méditerranéennes [URFM]
dc.contributor.authorFERNANDEZ-CONRADI, Pilar
hal.structure.identifierEcologie des Forêts Méditerranéennes [URFM]
dc.contributor.authorDUPUY, Jean-Luc
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorTRUEBA, Santiago
hal.structure.identifierEcologie des Forêts Méditerranéennes [URFM]
dc.contributor.authorPIMONT, François
hal.structure.identifierEcologie des Forêts Méditerranéennes [URFM]
dc.contributor.authorRUFFAULT, Julien
hal.structure.identifierEcologie des Forêts Méditerranéennes [URFM]
dc.contributor.authorMARTIN-STPAUL, Nicolas
dc.date.accessioned2023-11-20T17:24:12Z
dc.date.available2023-11-20T17:24:12Z
dc.date.issued2023-06-11
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/185713
dc.description.abstractEnForest ecosystems are increasingly threatened by anthropogenic pressures, especially by the increase in drought frequency and intensity. Tree species mixtures could improve resilience to diverse global anthropogenic pressures. However, there is still little consensus on how tree diversity affects water stress. Although some studies suggest that mixing species with different drought response strategies could be beneficial, the underlying mechanisms have seldom been identified. By combining a greenhouse experiment and a soil-plant-atmosphere hydraulic model, we explored whether mixing a drought avoidant (Pinus halepensis) and a drought tolerant (Quercus ilex) tree species could reduce plant water stress (defined as the risk of hydraulic failure) during extreme drought, compared to their respective monocultures. Our experiment showed that mixing species with divergent drought response strategies had a neutral effect on the droughtavoidant species and a positive effect on the drought-tolerant species. The model simulations further suggested that the beneficial effect of mixture on plant water stress during extreme drought was related to changes in the hydraulic connection of the plant from both the soil and the atmosphere. The ability of the drought-avoidant species to disconnect from the soil and the atmosphere limits its exposure to water stress, whereas the ability of the drought-tolerant species to increase its hydraulic connection to the soil lowers its hydraulic risk. This study brings a new insight on the mechanisms and traits combinations improving drought resistance in diversified forests and plantations, with important implications for forest management under climate change.
dc.language.isoen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/
dc.subject.enForest
dc.subject.enfunctional diversity
dc.subject.endrought resistance
dc.subject.entree hydraulic
dc.subject.ensafety margins
dc.title.enFunctional diversity reduces the risk of hydraulic failure in tree mixtures through hydraulic disconnection
dc.typeDocument de travail - Pré-publication
dc.identifier.doi10.1101/2023.06.09.544345
dc.subject.halSciences de l'environnement
dc.subject.halSciences du Vivant [q-bio]
bordeaux.hal.laboratoriesBioGeCo (Biodiversité Gènes & Communautés) - UMR 1202*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionINRAE
hal.identifierhal-04236496
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04236496v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2023-06-11&rft.au=MORENO,%20Myriam&SIMIONI,%20Guillaume&COCHARD,%20Herv%C3%A9&DOUSSAN,%20Claude&GUILLEMOT,%20Joann%C3%A8s&rft.genre=preprint


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