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作 者 ：王庆,刘丽君,杨宇峰*

期 刊 ：生态学报 2010年 30卷 13期 页码：3385~3395

关键词：轮虫；时空分布；浑浊度；典范对应分析；营养评价；

Keywords:rotifer, spatio-temporal distribution, turbidity, canonical correspondence analysis, nutrition evaluation,

摘 要 ：2006年8月至2007年8月,对广东省某水库4个站点轮虫群落的周年变化进行了调查分析，同时测定了浑浊度、叶绿素、总氮、总磷等理化因子。调查期间，共记录轮虫41种，以臂尾轮属和异尾轮属种类居多，全年以广布多肢轮虫(Polyarthra vulgaris)和尖尾疣毛轮虫(Synchaeta stylata)为主要优势种；轮虫丰度范围为6-1966 ind./L，以库心和大坝处的轮虫丰度较高，高峰期出现在夏秋季。相关分析显示叶绿素浓度对轮虫群落有重要影响。典范对应分析(CCA)表明,采样站点具有明显的空间异质性。CCA分析还表明浑浊度和透明度是影响轮虫空间分布的重要因子，水温和叶绿素浓度是影响轮虫群落结构季节变化的主要因子。CCA排序可将轮虫分为3个类群，优势种广布多肢轮虫位于CCA坐标轴的原点附近，表明其所受环境因子影响较小。根据相关加权营养状态指数（TLI），该水库处于中营养型。

Abstract:A survey of rotifers was carried out at four sites in a reservoir in Guangdong Province, from August 2006 to August 2007. Turbidity, Chlorophyll a (Chl a), Total Nitrogen (TN), Total Phosphorus (TP) were measured. Forty-one species of rotifers were recorded during the survey. The dominant species were Polyarthra vulgaris and Synchaeta stylata. The rotifer densities ranged from 6 to 1966 ind./L. There was a significant positive correlation between rotifer densities and chlorophyll a concentrations. Canonical correspondence analysis (CCA) was applied to explore the relationship between rotifer species and environmental parameters. The result of CCA showed that turbidity, transparency, temperature and chlorophyll a concentration were the most important factors regulating the composition and temporal-spatial dynamics of the rotifers community. Trophic state indexes (TLI) based on data of TN, TP, CODMN and chlorophyll a concentration ranged from 30 to 40, indicated the reservoir was in the meso-trophic level.

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