Invasive plants often pose serious threats to the natural biodiversity of invaded ecosystems and in this way are likely to alter ecosystem services. This applies to arbuscular mycorrhizal (AM) fungi, in which the invaders have been reported to modify community structure, which facilitates their further intrusion. Information as to the impact of such invasion on AM fungal communities is insufficient and therefore needed. In particular, little is known about how AM fungal communities shift in response to individual invasive species. To ascertain whether invasion changes the structure of indigenous AM fungal communities, we examined changes in AM fungal community composition and diversity in soil and in roots of native neighboring plants in response to incursion of five invasive plant species from the family Asteraceae: Conyza canadensis, Erigeron annuus, Echinops sphaerocephalus, Solidago canadensis, and Symphyotrichum novi-belgii. We found that invasions of tested invasive plant species altered composition of the AM fungal community and reduced the diversity of AM fungi in soil and in the roots of some native plants. Statistical significance of the invasions' effects depended on composition of AM fungal communities in roots of the native plant species and/or site and was not connected with changes in soil parameters. Our results confirm the notable influence of plant invasion on indigenous AM fungal biodiversity and the need for further study in various environmental conditions.

入侵植物常常对入侵的生态系统的自然生物多样性构成严重威胁，并以此方式可能改变生态系统的服务。这适用于丛枝菌根（AM）真菌，其中据报道入侵者会改变群落结构，从而有助于其进一步入侵。关于此类入侵对AM真菌群落影响的信息不足，因此需要。特别是，关于AM真菌群落如何响应单个入侵物种而转移的情况鲜为人知。为了确定入侵是否会改变土著AM真菌群落的结构，我们检查了AM真菌群落组成的变化以及土壤和本地邻近植物根系的多样性，以应对来自菊科的五种入侵植物物种的入侵：小飞蓬，一年蓬，蓝刺头，加拿大一枝黄花，和Symphyotrichum诺维- belgii。我们发现，经过测试的入侵植物物种的入侵改变了AM真菌群落的组成，并减少了AM真菌在土壤和某些天然植物根系中的多样性。入侵影响的统计显着性取决于原生植物物种和/或位置的根中AM真菌群落的组成，并且与土壤参数的变化无关。我们的结果证实了植物入侵对原生AM真菌生物多样性的显着影响，并且需要在各种环境条件下进行进一步研究。