广东省鼎湖山国家级自然保护区外来入侵植物调查

采用线路调查与样方调查相结合的方法．对鼎湖山国家级自然保护区不同功能区内的外来入侵植物进行了野外实地调查。结果表明，实验区、缓冲区和核心区都有外来入侵植物的分布。实验区样方内共发现53种植物。其中外来入侵植物计有14种。占植物总数的26．42％．外来入侵植物胜红蓟Ageratum conyzoides和小叶冷水花只fea microphylla的优势度综合值最大。在缓冲区样方内共调查到62种杂草，其中外采入侵植物14种．占植物总数的22．58％，外来入侵植物小叶冷水花、胜红蓟和三裂蟛蜞菊Wedelia trilobata的优势度综合值最大。在核心区的样方内共调查到了24种植物，外来入侵植物有3种，占植物总数的12．50％，入侵植物数量明显低于实验区和缓冲区，优势度综合值最大的外来入侵植物是草胡椒Peperomia pellucida和胜红蓟。同时对外来植物入侵途径和对保护区的生态影响也进行了分析。本调查结果将对自然保护区生物多样性的有效保护和外来入侵植物的管理提供科学依据。表3参18

A survey of invasive alien plant species in Dinghushan National Nature Reserve

The invasive Mien plant species in Dinghushan National Nature Reserve were investigated using line investigation and sample plot survey methods. The results showed that the invasive alien plant species were found in all experimental zone, the buffer zone, and core zone. There were 14 invasive alien plant species out of 53 investigated plant species, accounted for 26.42% of total plant species found in the experimental zone. In terms of the comprehensive values of dominance of invasive Mien weeds, Ageratum conyzoides and Pliea microphylla were larger than that of other plant species. In buffer zone, there were 14 invasive Mien plant species out of 62 investigated plant species, accounted for 22.58%t of total plant species. The comprehensive values of dominance of Pliea microphyUa, Ageratum conyzoides and Wedelia trilobata were larger than that of other plant species. There were only three invasive Mien plant species out of 24 investigated plant species occurred in core zone, which were clearly lower than those of experimental and buffer zones. The invasive alien plant species accounted for 12.5% of total plant species. The invasive alien plant species with the largest comprehensive values of dominance were Peperomia pellucida and Ageratum conyzoides. The introduction way and effect of the invasive alien plant species on ecosystem of Dinghushan National Nature Reserve were also discussed. The results were useful to reserve biodiversity and manage invasive Mien plant species in Dinghushan National Nature Reserve. Ch,. 3 tab. 18 ref.]