角毛藻的种类丰富度和细胞丰度具有典型的季节性特征。
The species richness and cell abundance of Chaetoceros were characterized by a typical seasonal pattern.
种类丰富度和细胞丰度在季节分布上表现为春夏季高于秋冬季，而在空间分布上总体表现为湾口高，向内湾逐渐降低。
Temporally, the species richness and cell abundance of Chaetoceros were characterized by a typical seasonal pattern, with the highest in spring and summer and the lowest in autumn and winter.
生物丰度指数提高了10.43，说明南京市区生物丰富程度有很大改观；
Moreover, biological abundance index increases by 10.43, indicating that the biological diversity changes a lot positively during four years.
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