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Environmental patterns of adaptation after range expansion in Leontodon longirostris : The effect of phenological events on fitness‐related traits

hal.structure.identifierCREAF - Centre for Ecological Research and Applied Forestries
dc.contributor.authorPEDRO, Manuel
hal.structure.identifierCREAF - Centre for Ecological Research and Applied Forestries
dc.contributor.authorMAYOL, Maria
hal.structure.identifierCREAF - Centre for Ecological Research and Applied Forestries
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorGONZALÉZ-MARTÍNEZ, Santiago
hal.structure.identifierCREAF - Centre for Ecological Research and Applied Forestries
dc.contributor.authorREGALADO, Ingrid
hal.structure.identifierCREAF - Centre for Ecological Research and Applied Forestries
dc.contributor.authorRIBA, Miquel
dc.date.issued2022
dc.identifier.issn0002-9122
dc.description.abstractEnPremise Because of expected range shifts associated with climate change, there is a renewed interest in the evolutionary factors constraining adaptation, among which are genetic bottlenecks, drift, and increased mutational load after range expansion. Here we study adaptation in the short-lived species Leontodon longirostris showing reduced genetic diversity and increased genetic load along an expansion route. Methods We assessed the phenological patterns of variation, and their effect on fitness-related traits, on 42 L. longirostris populations and six populations of the sister taxa L. saxatilis in a common garden located within the current range of both species. The comparison among L. longirostris populations allowed us to test for genetic clines consistent with local adaptation, whereas the comparison between taxa provided evidence for common adaptive features at the species level. Results We found significant within-species variability for most traits, as well as differences with its close relative L. saxatilis. In general, seeds from drier, warmer, and unpredictable habitats showed overall lower and more restricted conditions for germination, seedlings emerged later and plants flowered earlier. Consequently, genotypes from arid and unpredictable environments attained smaller reproductive sizes and allocated more biomass to reproduction. Flowering time had the strongest direct effect on total plant size, but seedling emergence also showed an important indirect effect. Conclusions Our results show the crucial role of phenological patterns in shaping adaptive clines for major life-history stage transitions. Furthermore, the genetic load observed in L. longirostris does not seem to preclude adaptation to the climatic variability encountered along the expansion route.
dc.language.isoen
dc.publisherBotanical Society of America
dc.subject.enAsteraceae
dc.subject.enbiomass allocation
dc.subject.enexpansion load
dc.subject.enflowering time
dc.subject.engermination
dc.subject.enLeontodon longirostris
dc.subject.enLeontodon saxatilis
dc.subject.enlife-history evolution
dc.subject.enphenology
dc.subject.enrange expansion
dc.title.enEnvironmental patterns of adaptation after range expansion in Leontodon longirostris : The effect of phenological events on fitness‐related traits
dc.typeArticle de revue
dc.identifier.doi10.1002/ajb2.1815
dc.subject.halSciences de l'environnement
bordeaux.journalAmerican Journal of Botany
bordeaux.peerReviewedoui
hal.identifierhal-03629052
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03629052v1
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