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首页> 外文期刊>The Science of the Total Environment >Chemical mixtures and fluorescence in situ hybridization analysis of natural microbial community in the Tiber river
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Chemical mixtures and fluorescence in situ hybridization analysis of natural microbial community in the Tiber river

机译：塔伯河天然微生物群落原位杂交分析的化学混合物及荧光

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The Water Framework Directive (WFD) regulates freshwater and coastal water quality assessment in Europe. Chemical and ecological water quality status is based on measurements of chemical pollutants in water and biota together with other indicators such as temperature, nutrients, species compositions (phytoplankton, microalgae, benthos and fish) and hydromorphological conditions. However, in the current strategy a link between the chemical and the ecological status is missing. In the present WFD, no microbiological indicators are foreseen for integrating the different anthropogenic pressures, including mixtures of chemicals, nutrients and temperature changes, to provide a holistic view of the freshwater ecosystem water quality. The main aim of this work was to evaluate if natural microbial populations can be valuable indicators of multiple stressors (e.g. chemical pollutants, temperature, nutrients etc.) to guide preventive and remediation actions by water authorities. A preliminary survey was conducted to identify four sites reflecting a contamination gradient from the source to the mouth of a river suitable to the objectives of the European Marie Curie project, MicroCoKit. The River Tiber (Italy) was selected as a pilot case study to investigate the correlation between bacteria taxa and the chemical status of the river. The main physicochemical parameters, inorganic elements, organic pollutants and natural microbial community composition were assessed at four selected sites corresponding to pristine, agricultural, industrial and urban areas for three consecutive years. The overall chemical results indicated a correspondence between different groups of contaminants and the main contamination sources at the selected sampling points. Phylogenetic analysis of the microbial community analyzed by Fluorescence In Situ Hybridization method (FISH) revealed differences among the four sampling sites which could reflect an adaptive bacterial response to the different anthropogenic pressures. (C) 2019 The Authors. Published by Elsevier B.V.
机译：水框架指令（WFD）在欧洲调节淡水和沿海水质评估。化学和生态水质的状态是基于水和生物群中的化学污染物的测量以及温度，营养素，物种组合物（植物植物，微藻，Benthos和鱼类）和水形式化条件等其他指标。然而，在目前的策略中，化学物质与生态状态之间的联系丢失。在目前的WFD中，未预见微生物指标，用于整合不同的人体压力，包括化学品，营养和温度变化的混合物，以提供淡水生态系统水质的整体视图。这项工作的主要目的是评估自然的微生物种群是否可以是多重压力源的有价值指标（例如化学污染物，温度，营养素等），以指导水当局的预防和修复行动。进行了初步调查，以确定从源头到河口的污染梯度的四个地点适合欧洲玛丽居里项目，微张专家的目标。选择河脚脚（意大利）作为试验案例研究，以研究细菌分类群与河流的化学地位。在连续三年与原始，农业，工业和城市地区对应的四个选定地点评估主要物理化学参数，无机元素，有机污染物和天然微生物群落组成。整体化学结果表明不同污染物组与所选采样点的主要污染源之间的对应关系。用荧光分析的微生物群体的系统发育分析（鱼类）分析的微生物群体（鱼类）揭示了四种采样位点的差异，这可能反映对不同人为压力的适应性细菌反应。 （c）2019年作者。由elsevier b.v出版。

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