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Deyeuxia angustifolia  (Komarov) Y. L Chang is an herb species originating from the birch forests in the Changbai Mountain. Recently, this species has been found encroaching into large areas in the western slopes of the alpine tundra in the Changbai Mountain, threatening the tundra ecosystem. In this study, we systematically assessed the response of the rhizosphere soil microbial to  D. angustifolia  encroaching in alpine tundra by conducting experiments for two vegetation types (shrubs and herbs) by real-time PCR and Illumina Miseq sequencing methods. The treatments consisted of  D. angustifolia  sites (DA), native sites (NS, NH) and encroaching sites (ES, EH). Our results show that (1) Rhizosphere soil properties of the alpine tundra were significantly impacted by  D. angustifolia  encroaching; microbial nutrient cycling and soil bacterial communities were shaped to be suitable for  D. angustifolia  growth; (2) The two vegetation community rhizosphere soils responded differently to  D. angustifolia  encroaching; (3) By encroaching into both vegetation communities,  D. angustifolia  could effectively replace the native species by establishing positive plant-soil feedback. The strong adaptation and assimilative capacity contributed to  D. angustifolia  encroaching in the alpine tundra. Our research indicates that  D. angustifolia  significantly impacts the rhizosphere soil microbial of the alpine tundra.

Response of rhizosphere soil microbial to Deyeuxia angustifolia encroaching in two different vegetation communities in alpine tundra