ArticleEcology and evolution2026
Distribution Patterns and Environmental Correlates of Invasive Plants Along an Urbanization Gradient in a Medium-Sized Mountainous City of Southwest China.
Article in Ecology and evolution, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Against the backdrop of ongoing urban expansion, alien plant invasions are closely linked to the stability of urban ecosystems. However, few studies have documented invasive plant distribution and their statistical associations with landscape variables in mountainous medium-sized cities, which serve as critical urban-rural transition zones. This study selected Anning City, a representative mountainous medium-sized city in Yunnan, Southwest China, as the research case. We established 63 standard sampling plots spanning urban, suburban, and exurban zones along an urbanization gradient. Canonical Correspondence Analysis (CCA) and Monte Carlo permutation tests were adopted to quantify statistical associations between six major macro-environmental variables and invasive plant spatial distribution, and to characterize the distribution features of invasive plants for reference in targeted monitoring work. The main observations are summarized as follows: (1) A total of 66 alien invasive plant species belonging to 24 families and 51 genera were recorded. Asteraceae was the most abundant family, accounting for 25.75% of all taxa; 68.18% of species originated from the Americas, and annual and biennial herbs dominated the community (75.75%), which tend to occur abundantly in frequently disturbed habitats. (2) This local dataset captured a site-specific trend where invasion abundance declines as urbanization intensity rises: the total number of invasive species increased from urban to suburban and exurban zones, yet significant gradient differentiation only existed in plant abundance rather than species richness. Suburban and exurban plots had similar abundance values (
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