斑地锦(Euphorbia maculata)入侵特征、地理分布和风险评估

Through the collation of literature and data, on the basis of understanding the biological and ecological characteristics, historical and geographical distribution, diffusion mode, etc. of Didijin, two risk assessment systems are adopted, namely the Australia (or New Zealand) Risk Assessment System (WRA ) And the Central European Risk Assessment System (WG-WRA) to assess its invasion risk. Ban Di Jin is native to North America and was first discovered in the 1940s in China’s southeastern coastal area; currently, it has been in 25 provinces in China 70 The city has a distribution and shows a trend of continuously expanding its distribution area over time. Biandijin is a poisonous plant of the Euphorbiaceae, with large seed yield and strong tolerance, adapting to a variety of climatic environments, it can be used in farmland, lawn, It is built and naturalized in various habitats such as roadsides and wasteland. Once the invasion is successful, it threatens the local ecological security and biodiversity. The risk assessment results show that the WG-WRA score is 22 points, and the invasion level is medium risk II The WRA risk assessment score is 29 points, which has a high risk of invasion; among them, the scores of agriculture and environment are 16 points and 15 points respectively. Both risk assessments show that Ban Di Jin has a higher invasion in China The risk is that exotic plants need to cause warnings. Therefore, we must strengthen the forecast and monitoring of bramble, and do the corresponding prevention and control work.