恶性外来入侵植物紫茎泽兰在云南的分布格局

云南省是我国紫茎泽兰入侵最早和危害最严重的地区,紫茎泽兰已对该地区的生物多样性与生态环境造成严重的危害.基于2008年该省16个州市的调查统计数据,分析了恶性外来入侵植物紫茎泽兰在云南发生的空间分布格局与不同生境条件下的发生面积及危害情况,为今后紫茎泽兰的科学防治提供参考.

Distributive pattern of malignant invasive species,Eupatorium adenophorum in Yunnan

Invasive species can alter the biological diversity, composition, structure, and function of terrestrial ecosystems. Yunnan Province is the earliest and most serious area on the exotic plant invasion. Eupatorium adenopho-rum, native to Mexico and Costa Rica of Central America, is a worldwide noxious invasive species. It occurs throughout many terrestrial areas of the world and is especially rampant in Southeast Asia, Hawaii, New Zealand, Austria and the Pacific islands. Since its invasion to China from the boundaries of Vietnam and Burma, the spread speed has been faster than anticipated. Presently, Eupatorium adenophorum can be found in Yunnan, Sichuan, Guizhou, Tibet, Guangxi, Chongqing, Taiwan and Hubei etc. provinces(autonomous regions,municipality). It spread from south to north and from west to east in southwest of China, which is considered as a threat to local e-conomy and biodiversity. The distribution pattern of this invasive plant in Yunnan Province has been mapped based on geographic information system, which can help to understand the mechanisms of its invasion and spread.