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Aridity and competition drive fire resistance trait covariation in mountain trees

hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
hal.structure.identifierRisques, Ecosystèmes, Vulnérabilité, Environnement, Résilience [RECOVER]
hal.structure.identifierÉcole Pratique des Hautes Études [EPHE]
dc.contributor.authorFRÉJAVILLE, Thibaut
hal.structure.identifierUniversity of Stirling
dc.contributor.authorVILÀ‐CABRERA, Albert
hal.structure.identifierRisques, Ecosystèmes, Vulnérabilité, Environnement, Résilience [RECOVER]
dc.contributor.authorCURT, Thomas
hal.structure.identifierÉcole Pratique des Hautes Études [EPHE]
dc.contributor.authorCARCAILLET, Christopher
dc.date.issued2018
dc.identifier.issn2150-8925
dc.description.abstractEnFire resistance traits drive tree species composition in surface-fire ecosystems, but how they covary at different scales of variation and with the environment is not well documented. We assessed the covariation of bark thickness (BT), tree height, and crown base-to-height ratio across Alpine forests, after accounting for the effects of tree diameter and competition for light on individual trait variation. Traits consistently correlated across individuals and communities, although the variance of BT mainly occurred among species, whereas crown elevation traits varied mainly within species. Aridity, temperature, and competition contributed to explain the variation of fire resistance traits among and within species, driving a trade-off between fire resistance and the ability to compete for light. Thick-barked species (fire-tolerant) that self-prune their lower branches (flame-avoiders) dominated the most fire-prone and flammable communities in sub-Mediterranean southern Alps, whereas thin-barked tree species that grow tall (competition for light) dominated the least fire-prone communities in the northern Alps. Our findings suggest a long-term interaction between mountain tree species and fire regime. Higher allocation to trunk elongation occurs in moist and shade environments, while higher allocation to thicken the bark and distancing the crown base from surface fuels occurs in open-canopy, dry forests where fire spreads with higher intensity.
dc.language.isoen
dc.publisherEcological Society of America
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.title.enAridity and competition drive fire resistance trait covariation in mountain trees
dc.typeArticle de revue
dc.identifier.doi10.1002/ecs2.2493
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalEcosphere
bordeaux.page1-11
bordeaux.volume9
bordeaux.issue12
bordeaux.peerReviewedoui
hal.identifierhal-02623331
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02623331v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Ecosphere&rft.date=2018&rft.volume=9&rft.issue=12&rft.spage=1-11&rft.epage=1-11&rft.eissn=2150-8925&rft.issn=2150-8925&rft.au=FR%C3%89JAVILLE,%20Thibaut&VIL%C3%80%E2%80%90CABRERA,%20Albert&CURT,%20Thomas&CARCAILLET,%20Christopher&rft.genre=article


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