The proportion of alien invasive species originating from America, Europe, Asia, Africa and Oceania were 55.1%, 21.7%, 9.9%, 8.1% and 0.6%, respectively.

• 来源于美洲、欧洲、亚洲、非洲、大洋洲的外来入侵物种分别占 5 5 .；1%25、2 1