关键词: 邻苯二甲酸双(2-乙基己基)酯(DEHP), 通菜, 水稻土, 累积效应

Abstract: Recent researches demonstrated that Merremia boisiana is a photophilou s heliophyte liana rather than a sciophyte, which has a wide ecological adaptabi lity a nd contains the allelochemicals, one of invasion mechanisms of invasive species. In China, M. boisiana had a distribution in Yunnan, Guangxi, and Guangdong Pro vinc es, but its distribution in Fujian Province has not been confirmed. Guangzhou City and its vicinity are becoming a new distribution area of M. boisiana due to i ts northward invasion from Hainan under global warming. However, M. boisiana is not really a kind of tropical plants, but one of the tropical and subtropical el ements. The tropic of cancer is the north boundary of M. boisiana distributi on, and thereby, there is a high possibility that M. boisiana is a latent lo cal species activated by global warming. M. boisiana causes widespread disas ter in its holotype locality (Vietnam) and its original distribution center (Hai nan Province), which is not consistent with the existing viewpoint that the inva sive species cannot spread to be a disaster owing to the natural enemies in orig in, while suggests that there are no fatal natural enemies in the origin. The widel y spreading to be a disaster is originated from the intrinsic ecosystem being de stroyed by disturbances, which causes the worsened, broken, and heterogeneous ha bitat. The reduced community biodiversity and functional group diversity intensi fy the invasive possibility of exotic communities and provide chance for invasiv e species. Therefore, the viewpoint that the invasion of M. boisiana is non-selective should be modified, and the prevention measures of M. boisiana remain to be break through. Integrative control should be the first choice. Addit ionally, protecting the natural ecosystem from disturbance, and reconstructing a nd optimizing the destroyed ecosystem would be the necessary strategies and meas ures.

Key words: di(2-ethylhexyl) phthalate (DEHP), Ipomoea aquatica, Paddy soil, Accumulation