000014338 001__ 14338 000014338 005__ 20250103100932.0 000014338 02470 $$2doi$$ahttps://doi.org/10.5061/dryad.18931zd4s 000014338 037__ $$aRDM 000014338 041__ $$aeng 000014338 245__ $$aData for: Increasing aridity may threaten the maintenance of a plant defense polymorphism 000014338 260__ $$bDryad 000014338 269__ $$a2024-11-19 000014338 336__ $$aDataset 000014338 337__ $$aDataset 000014338 347__ $$bxlsx files 000014338 347__ $$br files 000014338 347__ $$brdata files 000014338 347__ $$brdm files 000014338 347__ $$bsh files 000014338 520__ $$7Abstract$$aIt is unclear how environmental change influences standing genetic variation in wild populations. Here, we characterized environmental conditions that protect vs. erode polymorphic chemical defenses in Boechera stricta (Brassicaceae), a short-lived perennial wildflower. By manipulating drought and herbivory in a four-year field experiment, we measured the effects of driver variation on vital rates of genotypes varying in defense chemistry and then assessed interacting driver effects on total fitness (estimated as each genotype’s lineage growth rate, λ) using demographic models. Drought and herbivory interacted to shape vital rates, but contrasting defense genotypes had equivalent total fitness in many environments. Defense polymorphism thus may persist under a range of conditions; however, ambient field conditions fall close to the boundary of putatively polymorphic environment space, and increasing aridity may drive populations to monomorphism. Consequently, elevated intensity and/or frequency of drought under climate change may erode genetic variation for defense chemistry in B. stricta. 000014338 536__ $$oRocky Mountain Biological Laboratory$$aGraduate Fellowship 000014338 536__ $$oRocky Mountain Biological Laboratory$$aWatt Fellowship 000014338 536__ $$oNational Institute of General Medical Sciences$$cR01 GM086496 000014338 536__ $$oNational Science Foundation$$cDEB-1753980 000014338 540__ $$a<a href="https://spdx.org/licenses/CC0-1.0.html" target="_blank">Public domain</a> 000014338 542__ $$fCC0 000014338 6531_ $$aDrought 000014338 6531_ $$aHerbivory 000014338 6531_ $$aBiological sciences 000014338 6531_ $$aBalancing selection 000014338 6531_ $$aGlucosinolates 000014338 6531_ $$aintegral projection model 000014338 6531_ $$apolymorphism 000014338 6531_ $$atotal fitness 000014338 690__ $$aBiological Sciences Division 000014338 691__ $$aEcology and Evolution 000014338 7001_ $$1https://orcid.org/0000-0003-1911-7025$$2ORCID$$aCarley, Lauren$$uUniversity of Chicago 000014338 7001_ $$1https://orcid.org/0000-0003-3439-9921$$2ORCID$$aMitchell-Olds, Tom$$uDuke University 000014338 7001_ $$1https://orcid.org/0000-0001-5914-5974$$2ORCID$$aMorris, William$$uDuke University 000014338 791__ $$aText$$eIsCitedBy$$whttps://doi.org/10.1111/ele.70039$$2DOI$$tIncreasing Aridity May Threaten the Maintenance of a Plant Defence Polymorphism 000014338 85740 $$uhttps://doi.org/10.5061/dryad.18931zd4s$$yLink to research data 000014338 908__ $$aI agree 000014338 909CO $$ooai:uchicago.tind.io:14338$$pGLOBAL_SET 000014338 983__ $$aDataset