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首页> 外文期刊>Advances in limnology >Abundance and spatial variability of invertebrate com-munities in the River Lahn (Germany) and their relation to hyporheic properties
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Abundance and spatial variability of invertebrate com-munities in the River Lahn (Germany) and their relation to hyporheic properties

机译：拉恩河（德国）无脊椎动物群落的丰富度和空间变异性及其与流变性质的关系

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摘要

In the present study the effects of high level treated wastewater on the composition and dis-tribution of hyporheic fauna were examined. The physico-chemical environment and the quantity and quality of organic material in the interstitial pore system showed strong gradients along longitudinal, horizontal and depth profiles of two riffles upstream and downstream of the outlet of a wastewater treat-ment plant (WWTP). Also, interstitial invertebrate assemblages showed characteristic distribution pat-terns. In the downwelling zone of riffle A upstream of the WWTP, the invertebrate taxa Diptera, Cope-poda, Cladocera and Ephemeroptera accounted for 75 % of the total abundance, while in the down-welling zone of riffle B, 200 m downstream of the WWTP, the most abundant taxa were Nematoda, Oligochaeta and Isopoda accounting for a total of 65 % of the interstitial assemblage. Correlations between invertebrates and environmental parameters showed a shift from a carbon-controlled inverte-brate community in riffle A to a community controlled by toxic effects of wastewater in riffle B. Hydro-logical exchange processes had a substantially impact on the environmental conditions in the hyporhe-ic zone of riffle A. In contrast the composition and the dominance structure of the interstitial assem-blage in riffle B was clearly controlled by the effects of wastewater on the environmental conditions.
机译：在本研究中，研究了高处理废水对流变动物群的组成和分布的影响。间隙孔系统中的理化环境以及有机物质的数量和质量在废水处理厂（WWTP）出口上游和下游的两个浅滩的纵向，水平和深度剖面上显示出强烈的梯度。此外，间质无脊椎动物集合显示出特征性的分布模式。在污水处理厂上游浅滩A的下沉带中，无脊椎动物类群双翅目，足类，da藜和星翅目占总丰度的75％，而在污水处理厂下游浅滩B的约200m处。 ，最丰富的分类单元是线虫纲，寡纲纲和等足纲，共占间质组合的65％。无脊椎动物与环境参数之间的相关性表明，从浅滩A的碳控制无脊椎动物社区转变为浅滩B的废水有毒影响所控制的社区。水文交换过程对河床的环境条件有重大影响。相比之下，浅滩B的间隙集合体的组成和优势结构显然受到废水对环境条件的影响的控制。

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