The species structure of land snail communities inhabiting the meadow herb layer has been studied in the periods of relatively high emissions from the Middle Ural Copper Smelter (2006–2008) and after their almost complete reduction (2015–2017). No snails were found in the impact zone during these periods. In the background and buffer zones, their species richness during the second period decreased by a factor of two, and their abundance, by a factor of up to three, which was due to weather fluctuations (drought in 2016). The impact of drought was more distinct in the buffer zone, but two species (Discus ruderatus and Vitrina pellucida) appeared there and increased in abundance during the second period. The processes of recovery in land snail communities may be explained by normalization of soil pH and calcium content and also by an increase in the proportion of graminoids in the herb layer, which provided for stabilization of microclimatic conditions.

中文翻译：

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铜冶炼厂减排后的草原蜗牛群落

在中乌拉尔铜冶炼厂排放量相对较高的时期（2006-2008 年）和几乎完全减少之后（2015-2017 年），研究了栖息在草甸草本层的陆蜗牛群落的物种结构。在这些时期，撞击区没有发现蜗牛。在背景和缓冲区中，由于天气波动（2016 年干旱），它们在第二阶段的物种丰富度下降了两倍，而其丰富度则下降了多达三倍。干旱对缓冲区的影响更为明显，但有两个物种（铁饼和透明玻璃）在第二阶段出现并增加。