Status and Trends of Biological Invasions in China

【摘要】：Using document survey,filed survey and expert consultation,the invasive alien species(IAS) in the terrestrial ecosystem,inland water ecosystem and marine ecosystem of China were investigated. 488 IAS whose information include name,taxonomy,distribution,origin,site and time firstly identified, pathway,damage,nutrient circumstance,and habitant were identified.Among those IAS,species of Plantae,Animalia,Fungi,Vira,Procaryotae,Protista were 266,170,26,12,11,3 respectively,and these species accounted for 54.51%,34.84%,5.33%,2.46%,2.25%,0.61%respectively.392 IAS were analyzed on their invading years.The results showed,occurrence of 31 IAS before 1850,the number of IAS newly identified increasing totally after 1850,209 IAS account for 53.32%after 1950.Sites where IAS were firstly identified mainly distributed in the coastal region,Yunnan Province and Xinjiang Uyghur Autonomous Region,but trend of northward shift of sites was observed.Although unintentional introduction was primary invasion pathway recently,the percentage of intentional introduction almost equaled to of unintentional introduction.America,Europe and Asia were main origins of IAS of China.The number of IAS decreased from coastal region towards inland gradually.