The Royal Society
Browse
rspb20181713_si_001.pdf (456.73 kB)

Appendix S1 - S5 from Rapid reshaping: the evolution of morphological changes in an introduced beach daisy

Download (456.73 kB)
journal contribution
posted on 2019-08-23, 14:28 authored by Claire R. Brandenburger, William B. Sherwin, Stephanie M. Creer, Robert Buitenwerf, Alistair G. B. Poore, Richard Frankham, Patrick B. Finnerty, Angela T. Moles
Thousands of species have been introduced to new ranges worldwide. These introductions provide opportunities for researchers to study evolutionary changes in form and function in response to new environmental conditions. However, almost all previous studies of morphological change in introduced species have compared introduced populations to populations from across the species' native range, so variation within native ranges probably confounds estimates of evolutionary change. In this study, we used microsatellites to locate the source population for the beach daisy Arctotheca populifolia that had been introduced to eastern Australia. We then compared four introduced populations from Australia with their original South African source population in a common-environment experiment. Despite being separated for less than 100 years, source and introduced populations of A. populifolia display substantial heritable morphological differences. Contrary to the evolution of increased competitive ability hypothesis, introduced plants were shorter than source plants, and introduced and source plants did not differ in total biomass. Contrary to predictions based on higher rainfall in the introduced range, introduced plants had smaller, thicker leaves than source plants. Finally, while source plants develop lobed adult leaves, introduced plants retain their spathulate juvenile leaf shape into adulthood. These changes indicate that rapid evolution in introduced species happens, but not always in the direction predicted by theory.

History

Usage metrics

    Proceedings of the Royal Society B: Biological Sciences

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC