Table of Contents
Journal of Botany
Volume 2015, Article ID 167186, 4 pages
http://dx.doi.org/10.1155/2015/167186
Research Article

Purpose of Introduction as a Predictor of Invasiveness among Introduced Shrubs in Rwanda

College of Science and Technology, University of Rwanda, Huye Campus, P.O. Box 117, Butare, Rwanda

Received 19 June 2014; Revised 9 January 2015; Accepted 12 January 2015

Academic Editor: Curtis C. Daehler

Copyright © 2015 Jean Leonard Seburanga. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The introduced shrub flora in Rwanda was analyzed and the risk of invasion was assessed based on the species’ purposes of introduction. The results showed that more than half of invasive alien shrubs in Rwanda were introduced as ornamentals. They include Agave americana L., Bryophyllum proliferum Bowie ex Hook., Caesalpinia decapetala (Roth) Alston, Lantana camara L., and Tithonia diversifolia (Hemsley) A. Gray. However, these represented only 3.16% of the total number of introduced ornamental shrubs. At the time when the study was conducted, no introduced food crop had become invasive. Species introduced for purposes other than food or culinary use showed higher likelihood of becoming invasive.