中文摘要：

到水质量在浮游植物上由人为的活动和它的影响影响了的学习，在表面的差异 Miaodao 群岛，在浮游植物社区的空间与时间的变化和包围 Miaodao 的五个南部的岛的表面水的环境性质流水群岛被调查，基于从2012年11月进行到2013年8月的季节的领域调查。在调查期间，从 3 个组的 109 浮游植物种类的一个总数在 Miaodao 群岛， 77 是硅藻的南部的水里被识别， 29 是 dinoflagellates，并且 3 是 chrysophytes。种类数字在冬季(73 ) 是更高的，在秋天(70 ) 节制，但是在夏天(31 ) 和春天(27 ) 降低。在秋天(5.92 ) 和冬季(4.28 ) 的种类丰富索引在夏天(2.83 ) 和春天(1.41 ) 比那高。Shannon 牛肉熏香肠差异索引在秋天(2.82 ) 高，到冬季(1.99 ) 和夏天(1.92 ) 列在后面，并且在春天(0.07 ) 低。在秋天(0.46 ) 和夏天(0.39 ) 的种类平均索引在冬季(0.32 ) 和春天(0.02 ) 比那高。根据主要部件分析( PCA )和冗余性分析( RDA )，分别地，我们在冬季在春天，在夏天的货到付款，在秋天的 pH ，和咸度和油污染物质发现了那溶解的无机的氮(吵闹)和化学的氧需求(货到付款)与浮游植物差异的分发显示出最强壮的协会。Miaodao 群岛的南部的水的空间异质是相当明显的，并且三个地区，即，东北、西南、内部岛的水区域，被簇分析(CA ) 基于关键环境变量识别。

英文摘要：

To study the water quality influenced by the anthropogenic activities and its impact on the phytoplankton diversity in the surface waters of Miaodao Archipelago, the spatiotemporal variations in phytoplankton communities and the environmental properties of the surface waters surrounding the Five Southern Islands of Miaodao Archipelago were investigated, based on seasonal field survey conducted from November 2012 to August 2013. During the survey, a total of 109 phytoplankton species from 3 groups were identified in the southern waters of Miaodao Archipelago, of which 77 were diatoms, 29 were dinoflagellates, and 3 were chrysophytes. Species number was higher in winter（73）, moderate in autumn（70）, but lower in summer（31） and spring（27）. The species richness index in autumn（5.92） and winter（4.28） was higher than that in summer（2.83） and spring（1.41）.The Shannon-Wiener diversity index was high in autumn（2.82）, followed by winter（1.99） and summer（1.92）, and low in spring（0.07）. The species evenness index in autumn（0.46） and summer（0.39） was higher than that in winter（0.32） and spring（0.02）. On the basis of principal component analysis（PCA） and redundancy analysis（RDA）, we found that dissolved inorganic nitrogen（DIN） and chemical oxygen demand（COD） in spring, COD in summer, p H in autumn, and salinity and oil pollutant in winter, respectively, showed the strongest association with the distribution of phytoplankton diversity. The spatial heterogeneity of the southern waters of Miaodao Archipelago was quite obvious, and three zones, i.e., northeastern, southwestern and inter-island water area, were identified by cluster analysis（CA） based on key environmental variables.