近十年来，我国水库逐步成为越来越多城镇的饮用水水源地，尽管富营养化是湖库型水源地最突出的污染问题，严重威胁水生态健康与供水安全，但是对亚热带分层水库营养状态波动的时空规律及其机理的认知非常有限。本项目拟选择福建省厦门、漳州、泉州典型水库型水源地考察气候、水文、水质特征；综合利用氮、磷、透明度、叶绿素、以及微型生物（藻类、细菌、原生动物）等多指标研究水体营养状态时空变化的特征与规律，确定藻类水华发生的敏感库区和敏感时期；在分子、种群、群落水平研究微型生物群落结构与功能对分层水库富营养化的响应与反馈，揭示营养状态变动的微生态学机理和内源驱动机制。在理论方面，本研究将为我国海峡西岸地区水库富营养化和藻类水华防控提供科技支持；在实践方面，将为水库型水源地生态管理与保护、水质生物监测与预警提供可靠的数据支持。

Reservoirs in southeast China are important water resources for economic and social sustainable development, although few have been studied previously. During the past decade, growing population and increasing demands for water shifted the focus of many reservoirs from flood control and irrigation water to drinking water. However, eutrophication has become the most prominent and serious pollution problem for drinking water sources in China. Many studies have been made on eutrophication in large shallow lakes, but little is known about deep reservoirs in Fujian province, subtropical China. This project will investigate the tempo-spatial characteristics and microbial mechanisms of trophic state variation in the stratified reservoirs based on multi-parameters (nitrogen, phosphorus, chlorophyll a, Secchi disk transparency and microbial community) with emphasis on both structure and function of microorganisms (algae, bacteria and protozoa) in the subtropical Fujian province. This study will fill a major gap in the knowledge of the trophic state variation of Fujian stratified reservoirs while also contributing to research on microbial ecology and diversity during eutrophication process. This study will have direct theoretical implication for the eutrophication management and algal bloom control and practical implication for sustainable reservoir management and protection, water quality biomonitoring and early warning.