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Spatial variation in pollinator-mediated selection on phenology, floral display and spur length in the orchid Gymnadenia conopsea
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution.ORCID iD: 0000-0001-9573-2463
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution.
2015 (English)In: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137, Vol. 208, no 4, 1264-1275 p.Article in journal (Refereed) Published
Abstract [en]

Spatial variation in plant-pollinator interactions may cause variation in pollinator-mediated selection on floral traits, but to establish this link conclusively experimental studies are needed. We quantified pollinator-mediated selection on flowering phenology and morphology in four populations of the fragrant orchid Gymnadenia conopsea, and compared selection mediated by diurnal and nocturnal pollinators in two of the populations. Variation in pollinator-mediated selection explained most of the among-population variation in the strength of directional and correlational selection. Pollinators mediated correlational selection on pairs of display traits, and on one display trait and spur length, a trait affecting pollination efficiency. Only nocturnal pollinators selected for longer spurs, and mediated stronger selection on the number of flowers compared with diurnal pollinators in one population. The two types of pollinators caused correlational selection on different pairs of traits and selected for different combinations of spur length and number of flowers. The results demonstrate that spatial variation in interactions with pollinators may result in differences in directional and correlational selection on floral traits in a plant with a semi-generalized pollination system, and suggest that differences in the relative importance of diurnal and nocturnal pollinators can cause variation in selection.

Place, publisher, year, edition, pages
2015. Vol. 208, no 4, 1264-1275 p.
National Category
Ecology
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URN: urn:nbn:se:uu:diva-275786DOI: 10.1111/nph.13555ISI: 000365393000025OAI: oai:DiVA.org:uu-275786DiVA: diva2:901161
Funder
Swedish Research CouncilSwedish Research Council Formas
Available from: 2016-02-06 Created: 2016-02-06 Last updated: 2017-11-30Bibliographically approved

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Chapurlat, ElodieÅgren, JonSletvold, Nina

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