Abstract：
Vegetation cover has been consistently reported to be a factor influencing soil biota. Massive spreading of invasive plants may transform native plant communities, changing the quality of habitats as a result of modification of soil properties, most often having a directional effect on soil microorganisms and soil fauna. One of the most numerous microarthropods in the litter and soil is Acari. It has been shown that invasive plants usually have a negative effect on mites. We hypothesized that invasive Spiraea tomentosa affects the structure of the Uropodina community and that the abundance and species richness of Uropodina are lower in stands monodominated by S. tomentosa than in wet meadows free of this alien species. The research was carried out in wet meadows, where permanent plots were established in an invaded and uninvaded area of each meadow, soil samples were collected, soil moisture was determined and the mites were extracted. We found that Uropodina mite communities differed in the abundance of individual species but that the abundance and richness of species in their communities were similar. S. tomentosa invasion led primarily to changes in the quality of Uropodina communities, due to an increase in the shares of species from forest and hygrophilous habitats. Our results suggest that alien plant invasion does not always induce directional changes in mite assemblages, and conclude that the impact of an alien species on Uropodina may cause significant changes in the abundance and richness of individual species without causing significant changes in the abundance and diversity of their community.
摘要：
据报道，植被覆盖一直是影响土壤生物区系的一个因素。入侵植物的大规模传播可能会改变本地植物群落，由于土壤特性的改变而改变了栖息地的质量，最常见的是对土壤微生物和土壤动物有方向性的影响。凋落物和土壤中数量最多的微节肢动物之一是Acari。已经表明，入侵植物通常对螨虫有负面影响。我们假设入侵的毛绣线菊会影响Uropodina群落的结构，并且在以S.tomentosa为主的林分中，Uropodina的丰度和物种丰富度低于没有这种外来物种的湿草甸。这项研究是在潮湿的草地上进行的，在每个草地的入侵和未入侵区域建立永久地块，收集了土壤样本，测定土壤水分并提取螨虫。我们发现Uropodina螨群落的单个物种的丰度不同，但其群落中物种的丰度和丰富度相似。S.tomentosa的入侵主要导致Uropodina社区质量的变化，由于来自森林和潮湿栖息地的物种份额增加。我们的结果表明，外来植物的入侵并不总是引起螨组合的方向变化，并得出结论，外来物种对Uropodina的影响可能会导致单个物种的丰度和丰富度发生重大变化，而不会导致其群落的丰度和多样性发生重大变化。
