潜在外来入侵甜菜孢囊线虫在中国的适生性风险分析

本文应用MAXENT与GARP两种生态位模型对甜菜孢囊线虫在中国的适生性进行了风险分析和预测。结果表明甜菜孢囊线虫可在中国17个省市生存,适生范围为26°N～48°N,77.6°E～136°E。甜菜孢囊线虫入侵的高风险区:内蒙古南部、新疆西部、河北中南部、山西东北部、宁夏、甘肃北部;中风险区:北京、天津、陕西、山西大部、内蒙古西部和东南部、吉林西部、新疆北部;低风险区:河南、陕西南部、山东、内蒙古中东部、新疆中部、辽宁、吉林大部、黑龙江南部、江苏、安徽、湖北、湖南、江西、浙江北部;而青海、新疆南部、西藏、四川、重庆、云南、贵州、广西、广东、福建、海南、内蒙古少数地区和黑龙江部分地区属于基本不发生区。我国内蒙古、新疆、辽宁等省市甜菜种植区均适合甜菜孢囊线虫发生,对上述地区的进出口岸应加强甜菜孢囊线虫的检疫工作。

Potential geographic distribution of the potential invasive species,the sugar beet cyst nematode,Heterodera schachtii,in China

The sugar beet cyst nematode,Heterodera schachtii,is one of the important quarantine nematodes in China as well as in the world. The invasion risk of this nematode is becoming a more and more serious problem with regard to international trade. It is urgent to analyze the potential geographic distribution of H. schachtii in China. MAXENT and GARP,the two models,have been widely used to predict the potential geographic distribution of alien invasive species. The potential distribution of this nematode in China had been predicted with MAXENT and GARP models. The results indicated that H. schachtii can be distributed in at least 17 provinces in China. The potential distribution region in China is between 26°N-48°N,77.6°E-136°E. Risk assessment indicated that H. schachtii could occur at the major sugar beet growing areas of North China. It was suggested that the quarantine measures at the ports in potential areas should be strengthened.