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Soil water and nutrient availability interactively modify pollinator-mediated directional and correlational selection on floral display
Xihua Univ, Sch Architecture & Civil Engn, Chengdu 610039, Peoples R China..ORCID iD: 0000-0003-1029-7680
Sichuan Agr Univ, Coll Landscape Architecture, Chengdu 611130, Peoples R China..
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution.ORCID iD: 0000-0002-9868-3449
Sichuan Agr Univ, Coll Landscape Architecture, Chengdu 611130, Peoples R China..
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2023 (English)In: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137, Vol. 237, no 2, p. 672-683Article in journal (Refereed) Published
Abstract [en]
  • The individual and combined effects of abiotic factors on pollinator-mediated selection on floral traits are not well documented.
  • To examine potential interactive effects of water and nutrient availability on pollinator-mediated selection on three floral display traits of Primula tibetica, we manipulated pollination and nutrient availability in a factorial experiment, conducted at two common garden sites with different soil water content (natural vs addition).
  • We found that both water and nutrient availability affected floral trait expression in P. tibetica and that hand pollination increased seed production most when both nutrient content and water content were high, indicating joint pollen and resource limitation. We documented selection on all floral traits, and pollinators contributed to directional and correlational selection on plant height and number of flowers. Soil water and nutrient availability interactively influenced the strength of both pollinator-mediated directional and correlational selection, with significant selection observed when nutrient or water availability was high, but not when none or both were added.
  • The results suggest that resource limitation constrains the response of P. tibetica to among-individual variation in pollen receipt, that addition of nutrients or water leads to pollinator-mediated selection and that effects of the two abiotic factors are nonadditive.
Place, publisher, year, edition, pages
New Phytologist Foundation , 2023. Vol. 237, no 2, p. 672-683
Keywords [en]
context dependence, factorial experiment, floral evolution, interactive effects, pollinator-mediated directional and correlational selection, soil water and nutrient availability
National Category
Ecology Botany Evolutionary Biology
Identifiers
URN: urn:nbn:se:uu:diva-502264DOI: 10.1111/nph.18537ISI: 000888395600001PubMedID: 36229922OAI: oai:DiVA.org:uu-502264DiVA, id: diva2:1759106
Available from: 2023-05-24 Created: 2023-05-24 Last updated: 2023-05-24Bibliographically approved

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Sletvold, Nina

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