在蓝藻水华频发的淡水养殖生态系统中，具有慢性神经毒性的蓝藻毒素β-N-甲氨基-L-丙氨酸（BMAA）已成为一种新的污染物质，严重影响养殖生物正常的生长、发育和繁殖，尤其关系到水产品的食品质量安全问题。因此，关注和调查淡水养殖生态系统中BMAA毒素的污染特征并对其进行健康风险评估，以及研究和开发高效、安全的BMAA毒素污染调控技术显得尤为迫切和亟需。本项目通过调查我国典型淡水养殖生态系统中BMAA毒素的污染水平以及在水产品中的富集情况，初步提出基于我国国情的淡水养殖产品质量安全的BMAA毒素建议标准限值，并评估其对人体健康存在的潜在风险；同时利用微球化技术开发化感物质“没食子酸”的缓释抑藻剂，通过开展其抑藻能力、调控BMAA毒素污染效果及其生态安全性的研究，系统、科学、全面地评估利用新型化感缓释抑藻剂调控淡水养殖生态系统中BMAA毒素污染的可行性、有效性和安全性。

Cyanobacterial toxin of β-N-methylamino-L-alanine (BMAA) which possesses chronic neurotoxicity has become a new kind of pollutants in the freshwater aquaculture ecosystem with frequent occurrence of cyanobacterial blooms. It will seriously affect the normal growth, development and reproduction of the cultured species, especially related to the problem of food quality and safety of aquatic products. Therefore, the attention and investigation on the pollution characteristics of BMAA toxin and its health risk assessment in the freshwater aquaculture ecosystem, as well as the research and exploitation of efficient, safe control technology of BMAA toxin pollution are particularly urgent and desperately needed. In this project, the pollution levels of BMAA toxin and its enrichment in the aquatic products of the typical freshwater aquaculture ecosystem in China are investigated, and then the proposed standard limit of BMAA toxin for freshwater aquaculture product quality and safety will be preliminary established based on the situation of our country's, and the potential risk of BMAA existence to human health also will be evaluated. Meanwhile, the sustained-release antialgal agent of gallic acid is prepared by using the technology of microspheres. And then, the sustained-release antialgal agent will be systematically studied, including its algae-inhibition ability, control effect of BMAA toxin pollution, and its ecological safety to other aquatic organisms, in order to systematically, scientifically and comprehensively evaluate the feasibility, effectiveness and safety of using this new sustained-release antialgal agent for BMAA toxin pollution control in freshwater aquaculture ecosystems.