An altitudinal cline in UV floral pattern corresponds with a behavioral change of a generalist pollinator assemblage

Ecology
Matthew H Koski, Tia-Lynn Ashman

Abstract

Spatial variation in pollinator communities or behaviors can underlie floral diversification. Floral traits in the UV spectrum are common and mediate plant-pollinator interactions, but the role of pollinators in driving or maintaining their geographic variation has not been fully explored. We identify an altitudinal cline of increasing relative size of the UV bullseye pattern in Argentina anserina (Rosaceae) flowers, and assess whether pollination context contributes to clinal variation. At four sites that varied in altitude, we document the pollinator assemblage, and pollinator preference and visitation behavior. We then determine how pollinator visits affected pollen receipt and export. Finally, we describe how the functional relationship between UV floral phenotype and pollen receipt changed with altitude. Floral UV bullseye size increased with altitude, which corresponded with a change from a hymenopteran- to a dipteran-dominated pollinator assemblage. While dipteran and hymenopteran preferences for bullseye size were similar, flowers with large bullseyes received more foraging visits than those with small bullseyes at higher altitude. The reverse was observed at the lower altitudes; pollinators approached large-bullseye fl...Continue Reading

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Citations

Nov 1, 2016·Evolution; International Journal of Organic Evolution·Matthew H Koski, Tia-Lynn Ashman
May 2, 2017·Annals of Botany·Brook T MoyersLoren H Rieseberg
Jul 13, 2016·Annals of Botany·Marcelo Reginato, Fabián A Michelangeli
Jun 27, 2017·Ecology and Evolution·Tia L HarrisonJohn R Stinchcombe
Jun 28, 2018·Oecologia·Pedro Joaquim BergamoVinícius Lourenço Garcia de Brito
Mar 1, 2020·The New Phytologist·Matthew H Koski
Jul 2, 2019·The New Phytologist·Monica BorghiAlisdair R Fernie
Aug 16, 2016·American Journal of Botany·Andrea E BerardiDouglas R Taylor
Mar 4, 2021·Proceedings. Biological Sciences·Cierra N Sullivan, Matthew H Koski
Sep 19, 2020·Current Biology : CB·Matthew H KoskiTia-Lynn Ashman
May 25, 2021·Frontiers in Plant Science·Priscila TunesElza Guimarães
Jun 1, 2021·American Journal of Botany·Amanda E MartinsMaria Gabriela G Camargo
Jan 18, 2022·Evolution; International Journal of Organic Evolution·Matthew H KoskiNishanth Tharayil

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