| 河口区新建河道轮虫群落演替及与水环境的关系 |
| 摘要点击 2645 全文点击 1484 投稿时间：2014-01-02 修订日期：2014-04-29 |
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| 中文关键词 临港B港河道 轮虫 群落结构 演替 生态学评价 |
| 英文关键词 Lin'gang B Gang River rotifer community structure succession ecological assessment |
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| 中文摘要 |
| 于2011年12月~2012年11月对上海一河口性新建河道（临港新城B港河道）的轮虫群落结构进行为期1 a的调查研究，结果表明，调查期间该水体共检出轮虫23种，其中污染指示种19种；轮虫的种类数随河道建成时间的延长呈逐月上升趋势，从2种增加到13种；优势种在时间尺度上的演替明显，由开始的单一优势种螺形龟甲轮虫（Keratella cochlearis）向多种轮虫共同占优势转变，新建成的B港水体中的轮虫群落结构与外河水体（芦潮引河）存在明显的差异. 相关性分析表明，B港水体中轮虫总密度与温度、叶绿素a显著正相关（P<0.05），但与盐度无显著相关性；除螺形龟甲轮虫外，其他主要种类的密度均与营养盐浓度、盐度呈负相关关系（P<0.05）. 临港B港河道轮虫各月间的相似性指数较低，说明临港B港河道水体生态系统尚未稳定，仍处于不断变化中；但是轮虫的丰富度Margalef指数、多样性指数Shannon-Wiener指数逐月增大、E/O值逐渐下降. |
| 英文摘要 |
| The community structures of rotifers were surveyed in Lin'gang B Gang River, a new estuarial river in Shanghai, from December 2011 to November 2012. A total of 23 rotifer species were identified, of which 19 species were the indicator of environmental pollution. Rotifer species' number rose monthly from 2 to 13. A conspicuous succession of dominant species was observed from a single dominant species (Keratella cochlearis) to several species. The rotifer community structure of Lin'gang B Gang River differs with that of the outer water body (Lu Chaoyin River). Pearson analysis showed that the rotifers' density had a significant correlation with water temperature and chlorophyll-a (P<0.05), but had no significant correlation with salinity; the densities of dominant species (except Keratella cochlearis) presented negatively correlations with concentration of nutrients and salinity (P<0.05). The low species similarity index between every month demonstrated that aquatic ecosystem of Lin'gang B Gang River was in the unstable state. However, the increase of Margalef index and Shannon-Wiener index of rotifers and the decline of E/O value monthly showed the water environment of Lin'gang B Gang. River was improved. |
