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首页> 外文期刊>Environmental toxicology and chemistry >ECOLOGICAL HEALTH ASSESSMENTS BASED ON WHOLE EFFLUENT TOXICITY TESTS AND THE INDEX OF BIOLOGICAL INTEGRITY IN TEMPERATE STREAMS INFLUENCED BY WASTEWATER TREATMENT PLANT EFFLUENTS
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ECOLOGICAL HEALTH ASSESSMENTS BASED ON WHOLE EFFLUENT TOXICITY TESTS AND THE INDEX OF BIOLOGICAL INTEGRITY IN TEMPERATE STREAMS INFLUENCED BY WASTEWATER TREATMENT PLANT EFFLUENTS

机译：基于污水处理厂污水影响下温带全生态毒性测度和生物完整性指数的生态健康评估

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Whole effluent toxicity (WET) tests and ecosystem health assessments, based on test guidelines of U.S. Environmental Protection Agency (U.S. EPA) and index of biological integrity (IBI), were conducted on various streams located in Youngsan River watershed, Korea. The WET tests showed that about 33 and 82% of wastewater treatment plants (WWTPs) exhibited significant toxicity to Daphnia magna and Selenastrum capricornutum, respectively. Small WWTPs with low discharge volumes contributed less than 1% to the total stream toxicity. Fish community compositions and trophic guild analysis showed that the diversity index was greater in the control than in impacted streams, and the proportion of omnivore species was less in the control. Also, ecosystem health assessments, based on the IBI, showed distinct differences between the control and impacted sites of WWTPs. Model values of the IBI, based on 12 stream data sets, averaged 28, which is judged as a fair to poor condition according to the U.S. EPA criteria. The mean IBI in the control sites was 42, indicating good stream condition, whereas the impacted sites was scored 21, indicating poor condition. Overall, WET tests and ecosystem health assessments suggested the WWTP effluents had evident toxic effects on the biota, and impacted the species compositions and trophic guilds, resulting in degradation of the stream ecosystem health.
机译：根据美国环境保护署（U.S. EPA）的测试指南和生物完整性指数（IBI），对位于韩国永山河流域的各种溪流进行了整体废水毒性（WET）测试和生态系统健康评估。 WET测试显示，大约33％和82％的废水处理厂（WWTP）分别对大型蚤（Daphnia magna）和癸硒硒（Selenastrum capricornutum）表现出显着的毒性。排放量低的小型污水处理厂对总流毒性的贡献不到1％。鱼的群落组成和营养协会分析表明，对照中的多样性指数大于受影响河流中的，而对照中杂食动物种类的比例则较小。此外，基于IBI的生态系统健康评估显示，污水处理厂的控制站点和受影响站点之间存在明显差异。根据12个流数据集，IBI的模型值平均为28，根据美国EPA的标准，该模型的判断为中等至差。对照地点的平均IBI为42，表明溪流状况良好，而受影响地点的得分为21，表明状况较差。总体而言，WET测试和生态系统健康评估表明，污水处理厂废水对生物群具有明显的毒性作用，并影响了物种组成和营养协会，导致河流生态系统健康状况恶化。

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