Buffelgrass (Cenchus ciliaris) is a drought-tolerant invasive grass in the Americas and Australia that significantly impacts native plant communities and ecosystems. Despite the clear need to develop a comprehensive understanding of how buffelgrass is able to invade and rapidly establish in arid ecosystems, there is still a lack of knowledge as to if and how this weed might change the soil microbiome in a way that affects its dominance in the presence of management. We investigated the effect of buffelgrass on soil microbial communities in areas that have either been exposed to or not exposed to glyphosate in Saguaro National Park, Arizona USA. We found that buffelgrass roots in invaded areas are surrounded by a distinct soil community that includes a greater number of nitrifiers than in uninvaded soil. We also observed increases in arbuscular mycorrhizal fungi, ectomycorrhizal fungi and methanotrophs with buffelgrass invasion compared to uninvaded soil. Finally, we found no evidence of glyphosate effects on the soil microbiome. Overall, our study results suggest that buffelgrass can escape the limitation of nutrient availability in arid ecosystems by directly or indirectly modifying the soil microbiome. The competitive dominance of buffelgrass in arid systems might be indirectly enhanced by nitrifiers and fungal symbionts, which are often involved in rapid biomass accumulation. This work highlights the importance of soil microbiome considerations in weed science research.

水牛草（Cenchus ciliaris）是美洲和澳大利亚的耐旱入侵草，对当地植物群落和生态系统有重大影响。尽管明确需要全面了解水牛草如何在干旱的生态系统中入侵和快速建立，但仍然缺乏有关这种杂草是否以及如何以影响其在土壤中的优势的方式改变土壤微生物组的知识。管理层的存在。我们在美国亚利桑那州的Saguaro国家公园研究了水草对土壤微生物群落的影响，该区域已接触或未接触草甘膦。我们发现，入侵地区的水牛草根被独特的土壤群落所包围，该土壤群落比未入侵的土壤中包含的硝化剂数量更多。我们还观察到丛枝菌根真菌的增加，与未侵袭的土壤相比，外生菌根真菌和甲烷氧化菌具有水牛草入侵。最后，我们没有发现草甘膦对土壤微生物组的影响的证据。总体而言，我们的研究结果表明，水牛草可以通过直接或间接改变土壤微生物组来摆脱干旱生态系统中养分利用率的限制。水牛在干旱系统中的竞争优势可能通过硝化剂和真菌共生体间接增强，而硝化剂和真菌共生体通常参与快速的生物量积累。这项工作突出了杂草科学研究中土壤微生物组考量的重要性。我们的研究结果表明，水牛草可以通过直接或间接改变土壤微生物组来摆脱干旱生态系统中养分利用率的限制。水牛在干旱系统中的竞争优势可能通过硝化剂和真菌共生体间接增强，而硝化剂和真菌共生体通常参与快速的生物量积累。这项工作突出了杂草科学研究中土壤微生物组考量的重要性。我们的研究结果表明，水牛草可以通过直接或间接改变土壤微生物组来摆脱干旱生态系统中养分利用率的限制。水牛在干旱系统中的竞争优势可能通过硝化剂和真菌共生体间接增强，而硝化剂和真菌共生体通常参与快速的生物量积累。这项工作突出了杂草科学研究中土壤微生物组考量的重要性。