南宁市城区园林绿地系统外来入侵植物风险评估

Risk Assessment of Alien Invasive Plants in Green Space System of Nanning

开展南宁市城区园林绿地系统外来入侵植物风险评估,为建立外来植物入侵预警机制和制定防控措施提供科学依据。通过实地调查和文献查阅,调查南宁市城区园林绿地系统外来入侵植物种类及入侵状况,并通过多指标综合评判,构建城区园林绿地系统外来入侵植物风险评价体系。结果显示,外来入侵植物有116种,隶属32科88属;以菊科最多(24属31种),其它种类较多的依次为豆科8属12种、禾本科8属9种、大戟科4属8种、苋科4属6种和茄科3属6种。风险评估结果表明,高危害风险外来入侵植物有22种,占18.96%;中等危害风险有67种,占57.76%;低危害风险有27种,占23.28%。南宁市城区园林绿地系统外来入侵植物种类繁多,危害风险大,建议相关部门重视外来入侵植物防控工作。

Risk assessment of alien invasive plants in green space system of Nanning was carried out, which could provide scientific basis for establishing forewarning mechanism of alien invasive plants and formulating prevention and control measures. Based on field investigation and reported data, species and invasive status of alien invasive plants in urban areas of Nanning were investigated, and by comprehensive evaluation of many indexes, risk assessment system of alien invasive plants in green space system was structured. Results showed that there were 116 species of alien invasive plants belonging to 88 genera and 32 families. Among them, family with the most numerous species was Asteraceae including 31 species of 24 genera, followed by Leguminosae(12 species of 8 genera), Gramineae(9 species of 8 genera), Euphorbiaceae(8 species of 4 genera), Amaranthaceae(6 species of 4 genera) and Solanaceae(6 species of 3 genera). 22 species were high risk, accounting for18.96%;67 species were medium risk, accounting for 57.76%;27 species were low risk, accounting for 23.28%. Species of alien invasive plants in green space system of Nanning were abundant with severe threat. It was suggested that relevant departments should pay more attention to prevention and control of alien invasive plants.