水体紊动对藻类生长存在重要影响，但其干预机制尚不清晰。本项目假设存在三种干预机制，在不同紊动强度下分别起决定性作用，并以铜绿微囊藻为主要对象，设计系统的模拟试验，对其中的营养盐和光利用干预机制展开重点研究。基于铜绿微囊藻的生长增殖、光合作用特性和PI曲线，试验分析紊动对铜绿微囊藻的营养盐吸收动力学特性及竞争利用特性，以及光、营养盐梯度下紊动对铜绿微囊藻生长、竞争结果的影响。通过上述试验研究，量化紊动对铜绿微囊藻生长的影响，阐明紊动对铜绿微囊藻营养盐和光利用的干预机制；结合细胞外扩散层厚度分析，从藻细胞的营养盐输送效率、光合作用能力和机械损伤三个角度，厘清紊动对藻类生长的的干预机制；并通过人工控制紊动强度，在天然水体中进行实证试验。本项目研究成果可为进一步明晰藻类在水体生态系统中复杂因素作用下生长变化机制、探寻藻类水华的爆发机理提供重要的理论支持。

Flow turbulence has significant impact on algae growth, but the underlying intervention mechanism is still not clear. We hypothesize that there are three mechanisms which are individually determinant in different levels of turbulence intensity. The proposed project will focus on Microcystis aeruginosa and conduct a series of experiments in order to analyze the effect of flow turbulence on nutrient utilization dynamics and competition characteristics of Microcystis aeruginosa; analyze the effect of flow turbulence on light utilization of Microcystis aeruginosa with three indicators, algae growth rate, photosynthesis characteristics and PI curve; and analyze the impact of flow turbulence on Microcystis aeruginosa growth under nutrient gradients. From these experiment results, impact of flow turbulence on Microcystis aeruginosa growth can be quantified and the intervention mechanism of flow turbulence on nutrient and light utilization of Microcystis aeruginosa will be explained; via nutrient transport efficiency to algal cell (by analysis of the diffusive sublayer thickness on algal cell surface), growth rate and mechanical damage rate, the impact of flow turbulence on algae growth will be unerstood. Furthermore,the research findings will be verified in a natural lake.?It is anticipated that the research results will be of great scientific significance in order to further understand the algae growth and variation in complex aquatic ecosystems where numerous influencing factors exist and to explore the mechanism of algae bloom as well.