浙江南麂列岛外来入侵植物调查及其入侵性分析

Investigation and Invasive Analysis of Alien Invasive Plants in Nanji Islands,Zhejiang Province

通过野外实地调查及查阅相关文献资料确定南麂列岛外来入侵植物种类,结合海岛环境建立风险评估体系,提出管理建议.结果表明:从科属组成看,南麂列岛共有外来入侵植物40种,隶属14科31属.其中,菊科(Asteraceae)最多,占总数的27.50%;从入侵源看,来源于南美洲的外来入侵植物种类最多,占入侵植物总数的55.00%;从生活型看,外来种类中草本植物占了绝大多数,占总种数的82.50%;从入侵方式看,引入途径以无意引入最多,有22种,占总数的55.00%;从危害程度看,风险等级高的有7种,中等的有27种,低的有6种.评估结果与保护区内外来入侵植物现状基本相符.

The alien invasive plant species( AIPs) in Nanji Islands were identified based on the related literatures and field investigations.With the combination of the local ecological environment of Nanji Islands,the risk assessment index system of invasive plants was set up,and the management suggestions were put forward.The results showed that: On the families and genera of the AIPs,there were 40 species of invasive alien plants in Nanji Islands,belonging to 14 families and 31 genera.Of all the AIPs,the species of Asteraceae( account for 27.50%)were more abundant than those of the other families.On the source of the AIPs,the proportion of AIPs from South America was the highest,which was 55.00% of the total AIPs in Nanji Islands.On the biotype,most of the AIPs were herbal species,accounting for 82. 50% of the total AIPs. On the invasive pathway,22 species( 55. 00%)were introduced unintentionally.On the risk level,the number of AIPs with the level of high,medium and low risk was 7,27 and 6,respectively.The results were basically consistent with the status quo of AIPs in the reserve.