中文摘要：

2008年4月至2010年3月，对珠江广州河段2个站点（中大码头和鱼珠码头）轮虫群落结构进行每月一次的调查，同时测定了透明度、叶绿素、总氮、总磷等理化指标，利用非生物环境因子对水体的营养状况进行了评价，并通过轮虫种类组成、富营养型指示种数／贫营养型指示种数（E／O）指数对水质进行评价．调查期间，共记录轮虫66种，其中污染指示轮虫46种．优势种为微型多突轮虫、裂痕龟纹轮虫、西氏三肢轮虫、角突臂尾轮虫．轮虫丰度范围为69～5200ind．／L，中大码头采样点丰度最高；高峰期均出现在枯水期．轮虫丰度与pH、氮磷比显著正相关（P〈0．05），与温度显著负相关（P〈0．05）．根据水质生态学评价指标，珠江广州河段水体已达重度富营养水平，与非生物环境因子营养状态综合评价结果一致．

英文摘要：

Community structure of rotifers was investigated segment of the Pearl River with monthly sampling from April at two different sites in the tidal Guangzhou 2008 to March 2010. Transparency, Chlorophyll a （Chl a）, Total Nitrogen （TN）, Total Phosphorus （TP） and other physicochemical parameters were also measured simultaneously. Trophic state of waters was evaluated through non-biologic environmental factors. Ecological assessment of water quality was also carried out through the analysis of species composition of rotifers and E/O index. During the survey period, 66 species of rotifer were recorded and 46 species belong to pollution indicator. Lififerotrocha subtilis, Anuraeopsis fissa, Filinia novaezealandiae and Brachionus angularis were the dominant species. The abundance of rotifers ranged from 69 to 5 200 ind./L with the highest value at Zhongda pier site, The peak value of abundance was observed in the dry season. There was significantly positive correlations between pH, nitrogen-phosphorus ratios and rotifers abundance （P 〈 0. 05 ）. A significantly negative correlation was detected between temperature and rotifers abundance （P 〈 0.05 ）. According to the ecological assessment of water quality, Guangzhou river segment had reached the level of hypereutrophication, in accordance with the comprehensive evaluation of trophic state of non-biologic environmental factors.