TRUFFAUT, Laura; CHANCEREL, Emilie; DUCOUSSO, Alexis; DUPOUEY, Jean-Luc; BADEAU, Vincent; EHRENMANN, François; KREMER, Antoine

doi:10.1111/nph.14561

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TRUFFAUT, Laura
Biodiversité, Gènes & Communautés [BioGeCo]

CHANCEREL, Emilie
Biodiversité, Gènes & Communautés [BioGeCo]

DUCOUSSO, Alexis
Biodiversité, Gènes & Communautés [BioGeCo]

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Article de revue

Ce document a été publié dans

New Phytologist. 2017, vol. 215, n° 1, p. 126-139

Wiley

Résumé en anglais

Large-scale tree distribution changes have received considerable attention but underlying demo-genetic mechanisms are less well documented. We used a diachronic approach to track species shifts in a mixed oak stand (Quercus petraea-Quercus robur) at a fine spatiotemporal scale. Species assignment was made using single nucleotide polymorphism (SNP) fingerprints employing clustering and parentage analysis. Mating patterns and reproductive success were assessed by parentage analysis. Plot-based inventories of soil parameters and sapling densities provided ecological and demographic information, respectively. Sapling density and reproductive success was higher in Q. petraea than in Q. robur, and were correlated with a spatial expansion of Q. petraea (50% to 67% of the area). Admixed trees resulting from hybridization and backcrossing between the two species were more frequent under the Q. robur canopy. We suspect that species' differential responses to ongoing environmental changes and interspecific competition are the predominant factors accounting for the recruitment success of Q. petraea, while human interference, differential reproduction and hybridization (and backcrossings) are probably of more limited importance. We anticipate in mixed Q. petraea-Q. robur stands, under current ongoing environmental change, that these processes will be enhanced, at least in the western part of the distribution of the two species.< Réduire

Mots clés

approche diachronique

hybridation

quercus petraea

quercus robur

polymorphisme des nucléotides simples

changement environnemental

Mots clés en anglais

admixture

demography

recruitment

regeneration phase

hybridization

sessile oak

pedunculate oak

Single nucleotide polymorphism

DOI

http://dx.doi.org/10.1111/nph.14561

Project ANR

COntinental To coastal Ecosystems: evolution, adaptability and governance - ANR-10-LABX-0045
Recherches Avancées sur l'Arbre et les Ecosytèmes Forestiers - ANR-11-LABX-0002

Origine

Importé de hal

Unités de recherche

BioGeCo (Biodiversité Gènes & Communautés) - UMR 1202