RivestLajoieWattsEtAl2021

Référence

Rivest, S., Lajoie, G., Watts, D.A., Vellend, M. (2021) Earlier spring reduces potential for gene flow via reduced flowering synchrony across an elevational gradient. American Journal of Botany, 108(3):538-545. (Scopus )

Résumé

Premise: One of the best-documented ecological responses to climate warming involves temporal shifts of phenological events. However, we lack an understanding of how phenological responses to climate change vary among populations of the same species. Such variability has the potential to affect flowering synchrony among populations and hence the potential for gene flow. Methods: To test whether an earlier start of the growing season affects the potential for gene flow among populations, we quantified the distributions of flowering times of two spring-flowering plants (Trillium erectum and Erythronium americanum) over 6 years along an elevational gradient. We developed a novel model-based metric of potential gene flow between pairs of populations to quantify the potential for pollen-mediated gene flow based on flowering phenology. Results: Earlier onset of spring led to greater separation of peak flowering dates across the elevational gradient for both species investigated, but was only associated with a reduction in potential gene flow in T. erectum, not E. americanum. Conclusions: Our study suggests that climate change could decrease gene flow via phenological separation among populations along climatic gradients. We also provide a novel method for quantifying potential pollen-mediated gene flow using data on flowering phenology, based on a quantitative, more biologically interpretable model than other available metrics. © 2021 Botanical Society of America

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@ARTICLE { RivestLajoieWattsEtAl2021,
    AUTHOR = { Rivest, S. and Lajoie, G. and Watts, D.A. and Vellend, M. },
    JOURNAL = { American Journal of Botany },
    TITLE = { Earlier spring reduces potential for gene flow via reduced flowering synchrony across an elevational gradient },
    YEAR = { 2021 },
    NOTE = { cited By 0 },
    NUMBER = { 3 },
    PAGES = { 538-545 },
    VOLUME = { 108 },
    ABSTRACT = { Premise: One of the best-documented ecological responses to climate warming involves temporal shifts of phenological events. However, we lack an understanding of how phenological responses to climate change vary among populations of the same species. Such variability has the potential to affect flowering synchrony among populations and hence the potential for gene flow. Methods: To test whether an earlier start of the growing season affects the potential for gene flow among populations, we quantified the distributions of flowering times of two spring-flowering plants (Trillium erectum and Erythronium americanum) over 6 years along an elevational gradient. We developed a novel model-based metric of potential gene flow between pairs of populations to quantify the potential for pollen-mediated gene flow based on flowering phenology. Results: Earlier onset of spring led to greater separation of peak flowering dates across the elevational gradient for both species investigated, but was only associated with a reduction in potential gene flow in T. erectum, not E. americanum. Conclusions: Our study suggests that climate change could decrease gene flow via phenological separation among populations along climatic gradients. We also provide a novel method for quantifying potential pollen-mediated gene flow using data on flowering phenology, based on a quantitative, more biologically interpretable model than other available metrics. © 2021 Botanical Society of America },
    AFFILIATION = { Department of Biology, University of Ottawa, Ottawa, ON K1N 6N5, Canada; Département des Sciences Biologiques, Université du Québec à Montréal, Montréal, QC H2X 1Y4, Canada; Département de Biologie, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada },
    AUTHOR_KEYWORDS = { climate change; elevation gradient; flowering synchrony; gene flow; phenology; populations; spring ephemerals },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1002/ajb2.1627 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85102690538&doi=10.1002%2fajb2.1627&partnerID=40&md5=1c46ab61521709e6170dc035a1fc3fb5 },
}

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