Small urban centres as launching sites for plant invasions in natural areas: insights from South Africa

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Non-native species in urban environments: patterns, processes, impacts and challenges (2017, background): “McLean et al. (2017) show, for small urban centres in South Africa, that many non-native plant species enter towns via the horticultural ornamental trade and that half of the most abundant non-native species in towns have established naturalized populations outside urban areas.”
How do invasive species travel to and through urban environments? (2017, background): “Cities present a complex network of vectors that facilitate alien species movement—both within these environments, and subsequently into surrounding, natural areas (von der Lippe and Kowarik 2008; McLean et al. 2017).”
The status of biological invasions and their management in South Africa (2018, background): “Invasions in urban areas are particularly noteworthy both given the legal requirement for municipalities to report on biological invasions, and as urban areas are often the initial sites for introductions from which invasions spread (McLean et al. 2017; Padayachee et al. 2017).”