Preliminary Investigation and Analysis of Alien Invasive Species in Qingcheng District
Based on the List of Invasive Species in Forest Grassland Wetland Ecosystem of Guangdong Province,the occurrence,spatial distribution,harm degree and risk of alien invasive species in Qingcheng District were in-vestigated,in order to provide basic basis and prevention suggestions for the comprehensive prevention and con-trol of alien invasive species and biosecurity management in Qingcheng District.A total of 37 transect lines and 146 quadrates were investigated in 8 townships(streets)and 1 state-owned forest farm in Qingcheng District.In Qingcheng district,14 alien invasive plants and 3 alien invasive invertebrates were found.The composite family was the main plant,accounting for 50.0％.In terms of origin,more than 90％of alien invasive species are native to the American region.In terms of distribution,there were 13 species in Henghe Street,11 species in Feilaixia Town,11 species in Longtang Town,10 species in Dongcheng Street,8 species in Shijiao Town,6 species in Yuantan Town,6 species in Zhouxin Street,4 species in Fengcheng Street and 4 species in Yinzhan Forest Farm.In terms of harm degree,there are 5 kinds of severe harm,9 kinds of moderate harm and 3 kinds of mild harm.In terms of risks,there are 4 special dangers,8 high dangers and 5 moderate dangers.Most of the 17 alien invasive species found in this study have serious harm degree,wide distribution and high risk,especially in the northern hilly area and the central and southern plain area of Qingcheng District.On the whole,the situation of alien spe-cies invasion in Qingcheng District is more serious.
alien invasive speciesdegree of harmrisk analysisQingcheng District
万方数据
维普
