Subjects: Biology >> Botany >> Applied botany submitted time 2021-04-13 Cooperative journals: 《广西植物》
Abstract： Naturalization is the basic premise for exotic plants to surmount a series of obstacles and become invasive plants. It is helpful to prevent and control plant invasion for studying the species composition and distribution of naturalized plants. Based on literature reports and specimen records, this paper firstly makes statistics on naturalized plants in 126 prefecture-level cities in 12 provinces in western China, include all vascular plants, and analyzes the plant composition and temporal and spatial distribution characteristics. The results were as follows: There were 826 species of naturalized plants belonging to 107 families and 473 genera in the western region, accounting for about 75.16% of the 1 099 species of naturalized plants in the country. In terms of time, according to regression fitting, the cumulative growth of naturalized plants in the western region was stable before the 15th century, and then showed a Logistic pattern of growth. The growth rate was the largest in 1936. At present, the growth rate slowed down but the proportion of unintentional introduction was significantly higher than that in other periods. Spatially, the number and density of species are increasing from northwest to southeast and inland to the border, and there is a phenomenon of strong provincial capitals. Regression tree analysis shows that annual precipitation, GDP, average annual temperature and cropland ratio are the main driving factors for the distribution pattern of naturalized plants in the western region. This study enriches the basic data of naturalized plants in the western region, finds out the current situation of alien plant invasion in the western region, and provides scientific basis for its comprehensive control.
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