HoulePelletierBelisleEtAl2020

Référence

Houle, C., Pelletier, F., Belisle, M., Garant, D. (2020) Impacts of environmental heterogeneity on natural selection in a wild bird population*. Evolution, 74(6):1142-1154. (Scopus )

Résumé

Natural selection has been studied for several decades, resulting in the computation of thousands of selection estimates. Although the importance of environmental conditions on selection has often been suggested, published estimates rarely take into account the effects of environmental heterogeneity on selection patterns. Here, we estimated linear and nonlinear viability selection gradients on morphological traits of 12-day old nestlings in a wild population of tree swallows (Tachycineta bicolor) across a large-scale heterogeneous study system in southern Québec, Canada. We assessed the environmental drivers of nestling survival and evaluated their effects on strength and direction of selection gradients. Separate analyses of environmental variables showed that high temperatures and heavy rainfall caused stronger positive linear selection on morphological traits. Weaker linear selection was also measured in more extensively cultivated areas. Both strength and shape of nonlinear quadratic and correlational components of selection were modified by environmental variables. Considering all environmental variables revealed that precipitation since hatching affected patterns of linear selection on traits, while temperatures since hatching shaped nonlinear selection patterns. Our study underlines the importance of quantifying linear and nonlinear natural selection under various environmental conditions and how the evolutionary response of traits may be affected by ongoing human-induced environmental changes. © 2020 The Authors. Evolution © 2020 The Society for the Study of Evolution.

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@ARTICLE { HoulePelletierBelisleEtAl2020,
    AUTHOR = { Houle, C. and Pelletier, F. and Belisle, M. and Garant, D. },
    JOURNAL = { Evolution },
    TITLE = { Impacts of environmental heterogeneity on natural selection in a wild bird population* },
    YEAR = { 2020 },
    NOTE = { cited By 1 },
    NUMBER = { 6 },
    PAGES = { 1142-1154 },
    VOLUME = { 74 },
    ABSTRACT = { Natural selection has been studied for several decades, resulting in the computation of thousands of selection estimates. Although the importance of environmental conditions on selection has often been suggested, published estimates rarely take into account the effects of environmental heterogeneity on selection patterns. Here, we estimated linear and nonlinear viability selection gradients on morphological traits of 12-day old nestlings in a wild population of tree swallows (Tachycineta bicolor) across a large-scale heterogeneous study system in southern Québec, Canada. We assessed the environmental drivers of nestling survival and evaluated their effects on strength and direction of selection gradients. Separate analyses of environmental variables showed that high temperatures and heavy rainfall caused stronger positive linear selection on morphological traits. Weaker linear selection was also measured in more extensively cultivated areas. Both strength and shape of nonlinear quadratic and correlational components of selection were modified by environmental variables. Considering all environmental variables revealed that precipitation since hatching affected patterns of linear selection on traits, while temperatures since hatching shaped nonlinear selection patterns. Our study underlines the importance of quantifying linear and nonlinear natural selection under various environmental conditions and how the evolutionary response of traits may be affected by ongoing human-induced environmental changes. © 2020 The Authors. Evolution © 2020 The Society for the Study of Evolution. },
    AFFILIATION = { Département de biologie, Université de Sherbrooke, 2500 boulevard de l'Université, Sherbrooke, QC J1K 2R1, Canada },
    AUTHOR_KEYWORDS = { Environmental changes; morphological traits; natural selection; selection gradient; spatial selection; tree swallow },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1111/evo.13939 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85080984874&doi=10.1111%2fevo.13939&partnerID=40&md5=706afe3bac3861fe8c30b2c966cf8c21 },
}

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