淮河干流大型底栖动物群落结构及水质生物学评价

发布时间：2018-06-29 18:05

本文选题：淮河 + 大型底栖动物　；参考：《长江流域资源与环境》2017年11期

【摘要】：2011年3月、6月、9月和12月对淮河干流大型底栖动物群落进行了取样调查,共采集到大型底栖动物4门41科94种。结果分析表明,淮河干流大型底栖动物群落结构具有一定的时空变化。在时间尺度上,生物密度呈极显著的季节性变化(p=0.002),其最大值332.5 ind./m2出现在6月,最小值96.6 ind./m2则出现在9月;生物量的变化趋势与生物密度不同步,其最大值155.8 g/m2出现在9月,最小值40.0 g/m2则出现在3月,且季节性差异不显著。冗余分析(RDA)结果表明,溶解氧、盐度、溶解性总固体、水温和底质类型是影响底栖动物群落结构的主要环境因子。Shannon-Wiener多样性指数的季节性变化不显著,Margalef丰富度指数的季节性差异极显著(p=0.000);自上游至下游,这2个指数的变化规律表现出高度的一致性,其水质评价结果表明淮河干流水质总体上处于中度污染的水平。
[Abstract]:In March, June, September and December of 2011, the macrobenthic fauna communities in the main stream of Huaihe River were sampled and investigated. A total of 94 species of macrobenthos, 41 families and 4 families, were collected. The results showed that the community structure of macrobenthos in the main stream of Huaihe River had some temporal and spatial changes. On the time scale, the biological density showed a significant seasonal variation (p0. 002), the maximum value of 332.5 ind./m2 appeared in June, the minimum value of 96. 6 ind./m2 appeared in September, and the change trend of biomass was out of step with the biological density, and the maximum value of 155.8 g/m2 appeared in September. The minimum value of 40.0 g/m2 appeared in March, and the seasonal difference was not significant. Redundancy analysis (RDA) results show that dissolved oxygen, salinity, solubility of total solids, Water temperature and sediment type are the main environmental factors affecting the community structure of benthic fauna. The seasonal variation of Shannon-Wiener diversity index is not significant. The seasonal difference of Margalef richness index is extremely significant (p0. 000). The changes of the two indices showed a high consistency, and the results of water quality evaluation showed that the water quality of the main stream of the Huaihe River was generally at the level of moderate pollution.
【作者单位】：淮北师范大学生命科学学院;安徽大学资源与环境工程学院生态工程与生物技术安徽省重点实验室;
【分类号】：Q958.8;X826

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