South African Iridaceae with rapid and profuse seedling emergence are more likely to become naturalized in other regions
Article first published online: 14 MAY 2007
Journal of Ecology
Volume 95, Issue 4, pages 674–681, July 2007
How to Cite
VAN KLEUNEN, M. and JOHNSON, S. D. (2007), South African Iridaceae with rapid and profuse seedling emergence are more likely to become naturalized in other regions. Journal of Ecology, 95: 674–681. doi: 10.1111/j.1365-2745.2007.01250.x
- Issue published online: 14 MAY 2007
- Article first published online: 14 MAY 2007
- Received 29 January 2007; revision accepted 23 March 2007Editor: Angela Moles
- alien species;
- exotic species;
- introduced species;
- seed mass.
- 1Plant invasions constitute a large biological problem and screening protocols are needed to assess the invasive potential of species considered for introduction. However, insufficient information is available on species characteristics associated with successful establishment outside their native range.
- 2We tested experimentally whether seed and seedling emergence characteristics and early growth of seedlings are associated with naturalization of South African Iridaceae. In a common garden experiment, we compared these characteristics between 30 species that have become naturalized elsewhere and 30 congeneric species that have been introduced elsewhere but have failed to become naturalized.
- 3The average seed mass did not differ between naturalized and non-naturalized species but seedlings of naturalized species emerged faster and more profusely than their non-naturalized congeners. As a consequence of fast seedling emergence, naturalized species reached a larger size early in the season than did non-naturalized species.
- 4The results of our study indicate that rapid and profuse seedling emergence play important roles during naturalization, at least for Iridaceae from South Africa.