Marine heterotrophic nanoflagellate ( HNF ), as a key link in microbial loop, plays an important role in the material cycle, energy flow and nutrient remineralization of marine ecosystems. 微型异养鞭毛虫作为海洋微食物环的关键环节之一,在海洋生态系统的物质循环、能量流动和营养盐再生等方面扮演极其重要的角色,是当代海洋微食物环研究的重要对象。