SCHERMER, Éliane; BEL-VENNER, Marie-Claude; GAILLARD, Jean‐michel; BOULANGER, Vincent; DRAY, Stéphane; LE RONCÉ, Iris; OLIVER, Gilles; CHUINE, Isabelle; DELZON, Sylvain; VENNER, Samuel

doi:10.1111/nph.16224

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SCHERMER, Éliane
Ecologie quantitative et évolutive des communautés [LBBE]

BEL-VENNER, Marie-Claude
Ecologie quantitative et évolutive des communautés [LBBE]
Université de Lyon
Université Claude Bernard Lyon 1 [UCBL]

GAILLARD, Jean‐michel

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Article de revue

Ce document a été publié dans

New Phytologist. 2019-09-30, vol. 225, n° 3, p. 1181-1192

Wiley

Résumé en anglais

Many perennial plants display masting, that is, fruiting with strong interannual variations, irregular and synchronized between trees within the population. Here, we tested the hypothesis that the early flower phenology in temperate oak species promotes stochasticity into their fruiting dynamics, which could play a major role in tree reproductive success. From a large field monitoring network, we compared the pollen phenology between temperate and Mediterranean oak species. Then, focusing on temperate oak species, we explored the influence of the weather around the time of budburst and flowering on seed production, and simulated with a mechanistic model the consequences that an evolutionary shifting of flower phenology would have on fruiting dynamics. Temperate oak species release pollen earlier in the season than do Mediterranean oak species. Such early flowering in temperate oak species results in pollen often being released during unfavorable weather conditions and frequently results in reproductive failure. If pollen release were delayed as a result of natural selection, fruiting dynamics would exhibit much reduced stochastic variation. We propose that early flower phenology might be adaptive by making mast-seeding years rare and unpredictable, which would greatly help in controlling the dynamics of seed consumers.< Réduire

Mots clés

pollen phenology

Mots clés en anglais

masting

oak species

resource budget model

stochastic mast seeding

DOI

http://dx.doi.org/10.1111/nph.16224

Project ANR

PROJET AVENIR LYON SAINT-ETIENNE - ANR-11-IDEX-0007
Dynamiques eco-évolutives des maladies infectieuses - ANR-11-LABX-0048
Impact du changement climatique sur la reproduction et la regeneration des arbres forestiers

Origine

Importé de hal

Unités de recherche

BioGeCo (Biodiversité Gènes & Communautés) - UMR 1202