Increasing numbers of fungal species have been described recently from semi-natural grassland soils, raising the conservation interest of these species-rich habitats. Here, we characterize the soil fungal community inhabiting six fairy rings in a montane grassland of the Eastern Pre-Pyrenees through fungal DNA metabarcoding of ITS2 amplicons. Distinct soil fungal communities were observed outside of the rings compared to inside the ring areas. Higher abundances of fungi belonging to Pleosporales and Eurotiales were observed outside fairy rings, whereas zones belonging to the fairy rings showed higher abundances of Agaricales. Fungal diversity was higher inside the rings than outside. We found diverse saprotrophic or putative saprotrophic taxa associated with the studied rings, including the genera Clavaria, Psathyrella, Tricholoma, Amanita and Lycoperdon. These findings highlight the importance of particular keystone taxa in the structuring of fungal communities and their effect on the overall grassland fungal community.

近来，从半天然草原土壤中发现了越来越多的真菌物种，提高了对这些物种丰富的生境的保护兴趣。在这里，我们通过ITS2扩增子的真菌DNA metabarcoding表征了东部比利牛斯山脉山地草原上居住在六个仙人环上的土壤真菌群落。与环内相比，在环外观察到不同的土壤真菌群落。在仙女环之外观察到了更多的属于蕨类和欧洲鸡的真菌，而属于仙女环的区域则显示了更高的蛤higher菌。环内部的真菌多样性要高于外部。我们发现与所研究的环相关的各种腐化或假定的腐化类群，包括Clavaria属，沙眼菌，口蘑，鹅膏菌和狼疮。这些发现突出了特定基石分类群在真菌群落结构中的重要性及其对整个草地真菌群落的影响。