We investigated the impact of the effluent from four constructed wetlands on the structure of the macroinvertebrate and macrophyte communities in the receiving watercourses including the river Pesnica and the Sejanci Stream and Pavlovci Stream in NE Slovenia. Macroinvertebrates and macrophytes were sampled on the sites upstream and downstream of the inflows. Selected environmental parameters were also analyzed on each site. Among the measured chemical and physical parameters, the concentration of NH–N in the water was the only one that was changed significantly by the inflow from constructed wetlands (CWs). The metrics obtained on the base of the macroinvertebrate community, including the values of diversity indices, the proportion of sensitive taxa and the saprobic index, revealed no significant statistical differences between the upstream and downstream values. Inflows of effluent also have no detectable impact on macrophytes. The removal of degradable organic matter, nitrogen, phosphorus, and suspended solids from the wastewater in studied CWs was sufficient to support this situation, and this has been encouraging to construct new CWs.

中文翻译：

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夏末人工湿地的出水量对特定流域农业景观的影响

我们调查了四个人工湿地的污水对接收水道中大型无脊椎动物和大型植物群落结构的影响，包括斯洛文尼亚东北部的佩斯尼卡河、塞扬奇河和帕夫洛夫奇河。在入流上游和下游的地点对大型无脊椎动物和大型植物进行了采样。还对每个地点选定的环境参数进行了分析。在测量的化学和物理参数中，水中 NH3-N 的浓度是唯一一个因人工湿地（CW）流入而发生显着变化的参数。基于大型无脊椎动物群落获得的指标，包括多样性指数、敏感类群比例和腐生指数的值，显示上下游值之间没有显着的统计差异。污水流入对大型植物也没有可检测到的影响。在研究的化工厂中去除废水中的可降解有机物、氮、磷和悬浮固体足以支持这种情况，这鼓励了新的化工厂的建设。