海洋微型蓝细菌（picocyanobacteria）是海洋中最重要的初级生产者之一。原绿球藻（Prochlorococcus）和聚球藻（Synechococcus）是海洋微型蓝细菌最重要的两个类群。它们具有很高的遗传多样性，各自的基因型（genotype）对海洋环境的适应而产生多样化，形成了一系列生态型（ecotype）。原绿球藻依据对光照强度的适应分为高光适应型（high-lightadaptedecotypes）与低光适应型（low-lightadaptedecotypes）两大类，两者又分别包括一些低一级的生态型。聚球藻同样也拥有近20个已知的基因型，其中I-IV型在海洋环境中丰度最高。...Picocyanobacteria of genera Prochlorococcus and Synechococcus are among the most important primary producers in the ocean. It has been known that there are distinct genetic populations of Prochlorococcus that adapt to different marine environments, forming genotypes and ecotypes, such as the high-light adapted and low-light adapted ones which respectively dominate upper and lower euphotic zone in ...学位：理学博士院系专业：海洋与环境学院环境科学与工程系_环境科学学号：2262007015392
