随着有害棕囊藻藻华在中国沿海的不断扩展与加剧，棕囊藻成为有害藻华的研究热点，而其分类及多样性研究至今仍未被充分重视，目前中国沿海正式报道的仅"球形棕囊藻”1种。因此，本项目在发现了中国沿海新记录种——心形棕囊藻和扬棕囊藻的基础上，拟采用形态学、遗传学和分子生物学相结合的办法，借助流式细胞分选和高通量测序等先进技术，对我国沿海棕囊藻的种类及遗传多样性进行系统研究：（1）明确中国沿海棕囊藻种类的形态学和分子生物学的鉴定特征；（2）发现并描述我国沿海棕囊藻新记录种和/或新种，提供系统全面的棕囊藻种类名录；（3）阐明棕囊藻在我国沿海的生态分布及地理种群遗传多样性特征。以上研究结果将解答我国沿海棕囊藻的分类与地理分布特征等关键科学问题，有望发现棕囊藻的新记录种或新种，丰富中国海域棕囊藻的种类及遗传多样性研究，对于深入研究其藻华的发生机制、传播扩散及防治对策等都具有重要的理论与实际意义。

With the expansion and reoccurrence of harmful Phaeocystis blooms in China seas, it has, therefore, been the subject of intensive studies of harmful algae bloom. However, classification and genetic diversity of this genus are still not clear since only one "Phaeocystis globosa" species was reported along China coastal waters. Therefore, this project intends to apply a multidisciplinary approach including morphology, genetics and molecular biology: 1) to identify the morphology and molecular characterization of different Phaeocystis species or strains in China seas; 2) to investigate and describe new record or new species of Phaeocystis to China seas; 3) combined with the genetic database, to further analyze the phylogenetics and biogeographics of Phaeocystis species along the coastal waters of China and even the world. The ultimate aim of the present study is to explore the species and genetic diversity of Phaeocystis and their geographical distribution in China seas in order to promote a better understanding of the formation and migration of Phaeocystis blooms.