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Shade tolerance controls the spectrum of crown sizes and its response to local competition across European and North American tree species. Implications for light interception strategies

hal.structure.identifierLaboratoire des EcoSystèmes et des Sociétés en Montagne [UR LESSEM]
dc.contributor.authorTOUZOT, Laura
hal.structure.identifierLaboratoire des EcoSystèmes et des Sociétés en Montagne [UR LESSEM]
dc.contributor.authorBEAUCHAMP, Nathéo
hal.structure.identifierLaboratoire des EcoSystèmes et des Sociétés en Montagne [UR LESSEM]
dc.contributor.authorBARANGER, Anne
hal.structure.identifierLaboratoire des EcoSystèmes et des Sociétés en Montagne [UR LESSEM]
dc.contributor.authorCOURBAUD, Benoit
hal.structure.identifierOffice National des Forêts [ONF]
dc.contributor.authorCORDONNIER, Thomas
hal.structure.identifierUniversity Stefan cel Mare of Suceava [USU]
dc.contributor.authorOLIVIER, Bouriaud
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
hal.structure.identifierSwiss Federal Institute for Forest, Snow and Landscape Research WSL
dc.contributor.authorETZOLD, Sophia
hal.structure.identifierSwiss Federal Institute for Forest, Snow and Landscape Research WSL
dc.contributor.authorFISCHER, Christophe
hal.structure.identifierSwiss Federal Institute for Forest, Snow and Landscape Research WSL
dc.contributor.authorGESSLER, Arthur
hal.structure.identifierUniversity of Bristol [Bristol]
dc.contributor.authorJUCKER, Tommaso
dc.contributor.authorRUIZ-BENITO, Paloma
dc.contributor.authorZAVALA, Miguel
hal.structure.identifierLaboratoire des EcoSystèmes et des Sociétés en Montagne [UR LESSEM]
dc.contributor.authorKUNSTLER, Georges
dc.date.accessioned2025-07-25T02:02:06Z
dc.date.available2025-07-25T02:02:06Z
dc.date.issued2025-05-27
dc.identifier.issn0030-1299
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/207379
dc.description.abstractEnThe size of a tree and its crown are key drivers of its ability to intercept light. These characteristics are also constrained by biomechanical and hydraulic limitations, leading to tremendous variations in crown size and tree height between species. To date, there is no consensus on how covariation between crown characteristics (i.e. tree height, crown diameter and relative crown depth) control the spectrum of crown sizes, nor on the species characteristics (i.e. species climate niche or functional traits) that govern their variation. Using species‐specific allometric relationships accounting for local competition data on individual crown characteristics of tree species across Europe and North America, we showed that the spectrum of tree crown size is mainly driven by two independent axes: one correlating tree height with relative crown depth, and another linking crown diameter to crown volume. While both angiosperms and gymnosperms exhibited similar patterns of covariation for these crown characteristics, distinct ecological strategies emerged for maximum tree height. We also highlighted that shade‐tolerant species were characterized by wider and deeper crowns and showed reduced sensitivity to local competition in relative crown depth, indicating enhanced competitive resilience. Finally, simulations of light interception in virtual stands performed using a ray tracing algorithm highlighted the importance of different crown characteristics in various competitive contexts. Tree height was the primary determinant of light interception in low competitive contexts, common in early successional stages, whereas relative crown depth and crown diameter played a more significant role in high‐competitive contexts typical of late succession. These findings suggest that shade‐tolerant species, with their deeper crowns, are better equipped to intercept light under competition and ultimately emphasize the ability of shade tolerance to improve the realism of forest dynamic models as it can be used as an indicator of crown size and its response to competition.
dc.language.isoen
dc.publisherNordic Ecological Society
dc.title.enShade tolerance controls the spectrum of crown sizes and its response to local competition across European and North American tree species. Implications for light interception strategies
dc.typeArticle de revue
dc.identifier.doi10.1002/oik.10603
dc.subject.halSciences de l'environnement
bordeaux.journalOikos
bordeaux.hal.laboratoriesBioGeCo (Biodiversité Gènes & Communautés) - UMR 1202*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-05139377
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-05139377v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Oikos&rft.date=2025-05-27&rft.eissn=0030-1299&rft.issn=0030-1299&rft.au=TOUZOT,%20Laura&BEAUCHAMP,%20Nath%C3%A9o&BARANGER,%20Anne&COURBAUD,%20Benoit&CORDONNIER,%20Thomas&rft.genre=article


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