“…The success of exotic plants in invading some communities has been attributed to superiority of the exotic over the native species in some measurable traits, such as reproductive and dispersal capabilities, seedling establishment and survivorship, genome size, phenotypic plasticity, growth related characteristics, plant height, susceptibility to herbivory and pathogens, phenology, mutualistic interactions, allelopathy and plant-soil relationships (Pattison et al 1998;Smith and Knapp 2001;Ridenour and Callaway 2001;Cadotte et al 2005, Barrat-Segretain 2005, Orr 2005). Shiferaw et al (2004) reported that P. juliflora is equipped with a number of biological characteristics related to seed dormancy, germination and dispersal that can facilitate its rapid invasion of new areas (see also El-Keblawy and Al-Rawai 2005). In addition, P. juliflora has great ability to resprout with quick coppice growth from stumped/damaged trees, making it a very strong competitive invader (Shiferaw et al 2004).…”