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首页> 外文期刊>The Science of the Total Environment >Long-term ecological effects of the red mud disaster in Hungary: Regeneration of red mud flooded areas in a contaminated industrial region
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Long-term ecological effects of the red mud disaster in Hungary: Regeneration of red mud flooded areas in a contaminated industrial region

机译：匈牙利赤泥灾难的长期生态影响：受污染的工业区中赤泥淹没区的再生

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As one of the most severe ecological disasters ever to take place in Europe, the 2010 red mud accident has left behind long-term environmental impact, prompting the need for monitoring of soil biodiversity. Red mud (wet storage solution) can be regarded as a complex mixture of contaminants due to its extreme alkalinity and the presence of potentially toxic trace elements. After-effect investigations on soil properties and soil microarthropods were carried out in three distinct habitat types (agricultural land, grassland, woodland) in the red mud affected area. Soils in the red mud affected area were moderately to strongly alkaline (pH 7.5 to 8.5). Total content of trace metals Cd, Ni, Cr exceeded threshold concentrations for soil. Acari and Collembola were by far the most abundant taxa, while important groups like Pauropoda, Protura and Symphyla were completely absent from the samples of red mud affected plots. These observations were also reflected by the low values of the soil biological quality (QBS-ar) index. Independently of habitat types, total collembolan abundance tended to be lower in the contaminated area when compared with nearby control samples. Typical species distribution of Collembola communities in the contaminated area generally included one or two very common and abundant species and more, relatively rare species of low abundance. In the red mud affected open habitats, a distinct eudominance of Brachystomella parvula and Parisotoma notabilis was observed; whereas in contaminated woodland Parisotoma notabilis formed the bulk of the community with Sphaeridia pumilis, Folsomia manolachei and F. quadrioculata being subdominant. Species sensitive to alkalinity and red mud components (e.g. Hypogastrura vernalis, Lepidocyrtus tomosvaryi) were completely absent or were present only in limited numbers in the contaminated samples. (C) 2018 Elsevier B.V. All rights reserved.
机译：作为欧洲有史以来最严重的生态灾难之一，2010年的赤泥事故已经对长期环境造成了不利影响，因此需要对土壤生物多样性进行监测。赤泥（湿存储溶液）由于其极高的碱度和潜在的有毒微量元素的存在，可以被视为污染物的复杂混合物。在红泥影响区的三种不同的生境类型（农业用地，草地，林地）中进行了土壤特性和土壤微节肢动物的后效应调查。赤泥受影响地区的土壤呈中度至强碱性（pH 7.5至8.5）。痕量金属Cd，Ni，Cr的总含量超过了土壤的阈值浓度。到目前为止，Acari和Collembola是最丰富的分类单元，而受红泥影响的样地样本中完全没有Pauropoda，Protura和Symphyla等重要群体。这些观察结果还反映在土壤生物质量（QBS-ar）指数较低的情况下。独立于栖息地类型，与附近的对照样品相比，受污染区域的总血栓菌素丰度往往较低。受污染地区的Collembola群落的典型物种分布通常包括一种或两种非常普遍和丰富的物种，以及更多，相对稀有的低丰度物种。在受红泥影响的开放式生境中，观察到短小芽孢杆菌和Notateotoma notabilis的明显优势。而在受污染的林地中，Notnotoma notabilis构成了群落的主体，其中以Sphaeridia pumilis，Folsomia manolachei和F. quadrioculata为主。完全不存在对碱度和赤泥成分敏感的物种（例如，Hypogastrura vernalis，Lepidocyrtus tomosvaryi）或仅在有限数量的受污染样品中存在。 （C）2018 Elsevier B.V.保留所有权利。

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