The relative importance of sexual reproduction and clonal growth for the long-term maintenance of crowberry populations is poorly understood. Our objective was to characterize reproductive output, recruitment and clonal growth in different populations along a fire chronosequence at the treeline. Our research hypothesis was that sexual reproduction would be more important in younger sites, but that clonal growth would be prevalent in older sites. We quantified cover and reproductive output and reconstructed the establishment chronology of the crowberry populations. The positive relationship between crowberry cover and site age is mainly attributable to the presence of a tree cover at older sites. Fruit production, lower in forested sites, and seed viability were not related to site age. Recruitment of individuals appeared to be relatively similar between sites, while the number of clonal individuals increased with the time elapsed since the last fire. Our results partially support our research hypothesis. While clonal growth is more important for population maintenance at older sites, the species keeps investing in sexual reproduction, even when dominant.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 23 • No. 3-4