Abstract：
Aerobic composting increases the content of soluble nutrients and facilitates the safe treatment of livestock manure. Although different taxa play crucial roles in maintaining ecological functionality, the succession patterns of community composition and assembly of rare and abundant subcommunities during aerobic composting under antibiotic stress and their contributions to ecosystem functionality remain unclear. Therefore, this study used 16 S rRNA gene sequencing technology to reveal the response mechanisms of diverse microbial communities and the assembly processes of abundant and rare taxa to amoxicillin during aerobic composting. The results indicated that rare taxa exhibited distinct advantages in terms of diversity, community composition, and ecological niche width compared with abundant taxa, highlighting their significance in maintaining ecological community dynamics. In addition, deterministic (heterogeneous selection) and stochastic processes (dispersal limitation) play roles in the community succession and functional dynamics of abundant and rare subcommunities. The findings of this study may contribute to a better understanding of the relative importance of deterministic and stochastic assembly processes in composting systems, and the ecological functions of diverse microbial communities, ultimately leading to improved ecological environment.
摘要：
好氧堆肥增加了可溶性营养物质的含量，有利于畜禽粪便的安全处理。尽管不同的分类单元在维持生态功能方面发挥着至关重要的作用，抗生素胁迫下有氧堆肥过程中群落组成和稀有丰富亚群落组装的演替模式及其对生态系统功能的贡献尚不清楚。因此,本研究利用16SrRNA基因测序技术揭示了好氧堆肥过程中不同微生物群落的响应机制以及丰富和稀有类群对阿莫西林的组装过程。结果表明，稀有分类单元在多样性方面表现出明显的优势，社区组成,与丰富的类群相比，生态位宽度，强调它们在维持生态社区动态方面的重要性。此外,确定性（异质选择）和随机过程（分散限制）在丰富和稀有亚群落的群落演替和功能动态中起作用。这项研究的结果可能有助于更好地了解堆肥系统中确定性和随机性组装过程的相对重要性，以及不同微生物群落的生态功能，最终导致生态环境的改善。
