滑石矿开采对着生藻群落结构和水环境的影响

发布时间：2018-06-26 14:27

  本文选题：滑石矿 + 着生藻群落　； 参考：《环境科学》2017年09期

【摘要】：为了解滑石矿开采对河流水生态环境的影响,分别于2015年11月、2016年4月和2016年7月这3个时期对汤河(太子河重要支流)上游6个监测断面(TH01~TH02为参照河段,TH03~TH04为受损河段,TH05~TH06为恢复河段)的水质状况和着生藻群落进行了调查分析.利用Mann-Whitney U检验分析比较了各河段水环境因子和着生藻群落结构组成的差异;利用Spearman相关性分析、典范对应分析(canonical correspondence analysis)和t值双标图(t value biplot)分析水环境因子与着生藻群落结构的相互关系.结果表明:(1)与参照河段和恢复河段相比,受损河段的Mg、Se、As、Fe、Mo、EC、HCO-3、NO-3和p H均值最高.其中,Mg、Mo、As、EC、HCO-3在受损河段与其他河段间存在显著差异(P0.05).(2)与其他河段相比,受损河段的着生藻密度、物种丰富度、具柄硅藻百分比、曲壳藻属(Achnanthes sp.)相对丰度均最小,可运动硅藻百分比、双菱藻属(Surirella sp.)相对丰度和舟形藻属(Navicula sp.)相对丰度最大,其中物种丰富度在受损河段与其他河段间存在显著差异(P0.05).(3)EC、HCO-3和Mg对研究区域的着生藻群落结构有显著影响,且均与物种丰富度、具柄硅藻百分比显著相关(P0.05).
[Abstract]:In order to understand the influence of talc mining on river water ecological environment, Water quality and algal flora in the upper reaches of Tanghe River (important tributaries of the princeling River) were monitored in November 2015, April 2016 and July 2016, respectively. The investigation and analysis were carried out. Mann-Whitney U test was used to analyze the differences of water environmental factors and the composition of algal community in each reach, and Spearman correlation analysis was used. Canonical correspondence analysis (canonical correspondence analysis) and t value double plot (t value biplot) were used to analyze the relationship between water environmental factors and algal community structure. The results show that: (1) compared with the reference and restoration reaches, the damaged reach has the highest mean values of HCO-3no-3 and pH in the damaged reach. There was significant difference in HCO-3 between the damaged reach and other reaches (P0.05). (2). Compared with other reaches, the algae density, species richness, diatom percentage and (Achnanthes sp.) in the damaged reach were higher than those in other sections. The relative abundance is the smallest, the percentage of movable diatoms, Surirella sp. Relative abundance and Navicula sp. There was significant difference in species richness between the damaged reach and other reaches (P0.05). (3). ECHCO-3 and mg had significant effects on the community structure of algal communities in the study area, and were significantly correlated with species richness and the percentage of diatoms with stalks (P0.05).
【作者单位】： 辽宁大学环境学院;中国环境科学研究院流域水生态保护技术研究室;北京师范大学水科学研究院;
【基金】：国家水体污染控制与治理科技重大专项(2012ZX07501001) 国家自然科学基金项目(41571050)
【分类号】：X173;X82
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本文编号：2070680