| 高寒湿地演替过程对土壤细菌多样性的影响 |
| 摘要点击 736 全文点击 185 投稿时间：2024-03-28 修订日期：2024-05-11 |
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| 中文关键词 高寒湿地 高寒湿草甸 高寒草甸 土壤细菌 演替 |
| 英文关键词 alpine wetland alpine wet meadow alpine meadow soil bacteria succession |
| 作者 | 单位 | E-mail | | 道日娜 | 青海大学农牧学院, 三江源区高寒草地生态省部共建重点实验室, 西宁 810016 | daorrna@163.com | | 张英 | 青海大学农牧学院, 三江源区高寒草地生态省部共建重点实验室, 西宁 810016 | zhangying2019@126.com | | 李希来 | 青海大学农牧学院, 三江源区高寒草地生态省部共建重点实验室, 西宁 810016 | | | 李强 | 青海大学农牧学院, 三江源区高寒草地生态省部共建重点实验室, 西宁 810016 | | | 马林雄 | 青海大学农牧学院, 三江源区高寒草地生态省部共建重点实验室, 西宁 810016 | | | 铁晓龙 | 青海大学农牧学院, 三江源区高寒草地生态省部共建重点实验室, 西宁 810016 | |
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| 中文摘要 |
| 本研究旨在探究高寒湿地演变过程中土壤细菌群落结构与多样性的变化特征及其响应规律,并识别影响土壤细菌群落变化的主导因子,以期为高寒湿地生态系统的恢复治理提供科学依据. 选取高寒湿地演替过程中的3种不同类型（原始高寒湿地、高寒湿草甸和高寒草甸）,采用高通量测序技术分析土壤细菌群落的组成和多样性变化. 结果发现：①变形菌门（Proteobacteria）和酸杆菌门（Acidobacteria）是主要的优势菌门,其相对丰度均超过20.08%；在高寒湿地中,亚硝化单胞菌科（Nitrosomonadaceae）和RB41属为优势菌；而在高寒湿草甸和高寒草甸中,Chthoniobacteraceae科和Candidatus_Udaeobacter属占主导地位；②尽管群落多样性未表现出显著变化,但土壤细菌群落结构在不同演替阶段存在显著差异（P<0.05）；③群落主要以新陈代谢为核心功能；④Mantel测试和Pearson相关性分析揭示土壤pH值和全磷（TP）含量是驱动高寒湿地演替过程中土壤细菌多样性的关键因素. 在高寒湿地逆向演替过程中,土壤pH以及养分发生改变,这些变化共同作用于土壤细菌的群落结构和多样性. |
| 英文摘要 |
| This study aims to explore the characteristics of change and the rules of response of the soil bacterial community structure and diversity during the evolution of alpine wetlands. It also seeks to identify the leading factors affecting changes in the soil bacterial community, with the goal of providing a scientific basis for the restoration and management of alpine wetland ecosystems. Three different types of wetlands （original alpine wetland, alpine wet meadow, and alpine meadow） were selected to represent the succession process of alpine wetlands. The composition and diversity of the soil bacterial communities were analyzed using high-throughput sequencing technology. The findings revealed the following： ① Proteobacteria and Acidobacteria were the predominant bacteria, with their relative abundance exceeding 20.08%. In the alpine wetland, Nitrosomonadaceae and RB41 were the dominant bacteria. Meanwhile, Chthoniobacteraceae and Candidatus_Udaeobacter were the dominant genera in the alpine wet meadow and alpine meadow, respectively. ② Although no significant change was observed in community diversity, significant differences were present in the structure of the soil bacterial community at different succession stages （P<0.05）. ③ Metabolism was a core function. ④ The Mantel test and Pearson correlation analysis indicated that soil pH and total phosphorus （TP） content were the primary factors influencing soil bacterial diversity throughout the succession process of alpine wetlands. During the process of reversed succession in alpine wetlands, changes in soil pH and nutrient content occur, and these changes collectively influence the structure and diversity of the soil bacterial community. |
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