Predispersal seed herbivores, not pollinators, exert selection on floral traits via female fitness

Ecology
Amy Parachnowitsch, C M Caruso

Abstract

Herbivores that oviposit in flowers of animal-pollinated plants depend on pollinators for seed production and are therefore expected to choose flowers that attract pollinators. This provides a mechanism by which seed herbivores and pollinators could impose conflicting selection on floral traits. We measured phenotypic selection on floral traits of Lobelia siphilitica (Lobeliaceae) via female fitness to determine the relative strength of selection by pollinators and a specialist predispersal seed herbivore. We were able to attribute selection on flowering phenology to the herbivores. However, no selection could be attributed to pollinators, resulting in no conflicting selection on floral traits. Unlike pollinators, whose preference for certain floral traits does not always translate into higher fitness, any discrimination by seed herbivores is likely to decrease fitness of the preferred floral phenotype. Thus predispersal seed herbivores may be a significant agent of selection on floral traits.

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Citations

Apr 25, 2013·Heredity·J T AndersonT Mitchell-Olds
Feb 14, 2013·Journal of Experimental Botany·Beth A Krizek, Jill T Anderson
Oct 23, 2013·Proceedings of the National Academy of Sciences of the United States of America·Jon AgrenJohan Ehrlén
Oct 29, 2008·Proceedings of the National Academy of Sciences of the United States of America·Charles G WillisCharles C Davis
Nov 26, 2015·Evolution; International Journal of Organic Evolution·Emily J Austen, Arthur E Weis
May 10, 2011·Trends in Genetics : TIG·Jill T AndersonThomas Mitchell-Olds
Oct 3, 2015·Journal of Experimental Botany·Kemal Kazan, Rebecca Lyons
Jun 26, 2009·The New Phytologist·Lawrence D Harder, Steven D Johnson
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Dec 16, 2011·Journal of Evolutionary Biology·A BurkhardtG Bernasconi
Jan 10, 2012·The New Phytologist·Magdalena P Bartkowska, Mark O Johnston
Aug 21, 2010·The New Phytologist·Amy L Parachnowitsch, André Kessler
Sep 14, 2010·Journal of Evolutionary Biology·M B MorrisseyA J Wilson
Jan 10, 2012·The New Phytologist·Amy L Parachnowitsch, Marc J Lajeunesse
Aug 12, 2009·Evolution; International Journal of Organic Evolution·Richard J ReynoldsCharles B Fenster
Aug 11, 2015·Evolution; International Journal of Organic Evolution·Jill T AndersonMonica A Geber
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Dec 15, 2010·Plant Signaling & Behavior·Amy Parachnowitsch, André Kessler
Apr 19, 2017·The New Phytologist·Emily J AustenJessica R K Forrest
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Jan 29, 2019·The Journal of Animal Ecology·Alicia Valdés, Johan Ehrlén
Feb 14, 2019·BMC Plant Biology·Rafael Fonseca BenevenutoJames Polashock
Oct 29, 2020·The New Phytologist·Elena HamannJill T Anderson

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