褶皱臂尾轮虫适应性耐受棕囊藻的生存对策响应及其机制研究

频繁暴发的棕囊藻赤潮给相关海域生态系统带来严重危害。从生态系统的视角，通过原位复壮对赤潮藻类摄食能力强的浮游动物种群，提高下行效应，增强食物链的能量流动通量，有助于减轻有害藻类的危害。褶皱臂尾轮虫是海域生态系统的重要生态功能类群，能够快速清除棕囊藻种群，具有控制早期棕囊藻赤潮的潜力。但是，由于棕囊藻自身营养成分的限制，褶皱臂尾轮虫种群长期以棕囊藻为食物时，其生存策略如何调整及其内在机制是亟待探索的关键科学问题。鉴于这种思考，本项目拟研究褶皱臂尾轮虫摄食不同质量食物（小球藻和不同生长阶段棕囊藻）时其生活史特征与种群动态变化及机制，建立轮虫关键生活史参数与其食物及自身各类营养成分的关系，同时侧重解析轮虫种群长期摄食棕囊藻的适应性生存对策响应及其机制。本研究有助于模拟评估轮虫实际应用于控制棕囊藻的可持续能力，对于揭示轮虫对食物质量的适应性生存对策响应机制也具有重要的基础理论意义。

The frequent outbreak of Phaeocystis blooms has brought serious harm to the related marine ecosystem. From the perspective of the whole ecosystem, in-situ strengthening the specific zooplankton population with strong feeding ability on harmful algae can improve the top-down effect and enhance the energy flow flux of the food chain, which is helpful to alleviate the harm of harmful algae. Brachionus plicatilis is an important ecological functional group in marine ecosystem, and it can quickly remove the population of Phaeocystis and has the potential to control the early stage of Phaeocystis blooms. However, due to the limitation of the nutritional components of Phaeocystis, how B. plicatilis population fed on Phaeocystis for a long time adjusts its survival strategy and the underlying mechanism are the key scientific issues to be explored urgently. In view of this idea, this project will study the life history characteristics and population dynamics of the rotifer B. plicatilis fed on different quality food (Chlorella vulgaris and Phaeocystis at different population growth stages), establish the relationship between the key parameters of life history of rotifer and the various nutrients of rotifer and its food, and specially focuses on the analysis of adaptive survival strategy response and the underlying mechanism of rotifer fed on Phaeocystis for a long time. This study is helpful to evaluate the sustainable capacity of practical application of rotifer feeding in the control of Phaeocystis, and it also has importantly theoretical significance for revealing the response mechanism of adaptive survival strategies of rotifer to food quality.