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[目的]对我国东江流域河岸带外来入侵植物进行调查分析,并对其进行风险评估。[方法]野外调查主要采用样方调查与线路调查相结合的方法,覆盖整个东江流域。其中干流共设52个样点,支流87个样点,累计设置样方624个;风险评估采用多指标综合评价法,设立了6个一级指标,25个二级指标。[结果]经过近2年对东江流域河岸带外来入侵植物进行的详细调查,该流域共发现外来入侵植物51种,隶属于17科38属。对这51种外来入侵植物进行了风险级别评价,结果表明,藿香蓟等18种入侵植物风险评估得分在60分以上,属于高风险级别;土荆芥等26种入侵植物风险评估得分在30～60之间,属于中风险级别;毛花雀稗等7种入侵植物风险评估得分在30分以下,属于低风险级别。[结论]为我国东江流域河岸带的保护和管理以及该流域水环境的治理和功能区划提供了基础资料。
[Objective] The investigation and analysis of the alien invasive plants in the riparian zone of Dongjiang River in our country and risk assessment. [Method] The field survey mainly adopted the method of combining quadrat investigation and route survey to cover the entire Dongjiang River valley. Among them, there are 52 sample points in total and 87 sample points in the mainstream, with a total of 624 samples being set up. The risk assessment adopts the multi-index comprehensive evaluation method and establishes 6 first-level indicators and 25 second-level indicators. [Result] After nearly 2 years of detailed investigation of alien invasive plants in riparian zone of Dongjiang River, 51 alien invasive plants were found in this basin, belonging to 38 genera and 17 families. The risk assessment of 51 invasive alien plants was carried out. The results showed that the risk assessment scores of 18 invasive plants such as Ageratum were more than 60, which were at high risk level. The risk assessment scores of 26 invasive plants such as Nepetaphylla were 30 ~ 60, belong to the risk level; Catharanthesporum seven kinds of invasive plant risk assessment score of 30 points or less, are low-risk level. [Conclusion] This article provided the basic information for the protection and management of the riparian zone in the Dongjiang River basin in our country, as well as the governance and functional zoning of the water environment in the river basin.