塔里木盆地3种生境土壤细菌群落多样性  

Diversity of soil bacterial communities in three habitats of theTarim Basin

作　　者：杨果 赵迪迪 王殿付 郑金水[2] 万传星[1] 张利莉[1] 罗晓霞[1] YANG Guo;ZHAO Didi;WANG Dianfu;ZHENG Jinshui;WAN Chuanxing;ZHANG Lili;LUO Xiaoxia(Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin,Xinjiang Production&Construction Corps,College of Life Sciences and Technology,Tarim University,Alar 843300,Xinjiang,China;Huazhong Agricultural University,Wuhan 430070,Hubei,China)

机构地区：[1]塔里木大学生命科学与技术学院新疆生产建设兵团塔里木盆地生物资源保护与利用重点实验室,新疆阿拉尔843300 [2]华中农业大学,湖北武汉430070

出　　处：《微生物学通报》2024年第6期2030-2048,共19页Microbiology China

基　　金：第三次新疆综合科学考察计划(2022xjkk020601);“西部之光”青年学者项目(2022-XBQNXZ-019);塔里木大学研究生科研创新项目(TDGRI202301)。

摘　　要：【背景】塔里木盆地作为中国最大的内陆盆地,是研究局部尺度细菌群落对环境反应的一个天然实验室。目前虽有学者对其细菌多样性进行了研究分析,但针对塔里木盆地植物生境细菌群落多样性及分布格局的调查分析却尚属空白。【目的】解释塔里木盆地植物生境下的细菌群落多样性及分布格局并为该地区细菌资源挖掘提供数据。【方法】通过对塔里木盆地植物生境土壤进行大尺度、系统的野外调查采样,分析了细菌的群落结构和多样性,探究了土壤细菌多样性与群落空间格局在大尺度上沿地理与气候环境梯度的变化规律,以及大陆水平上系统发育类群的组装过程。【结果】植物生境与沙漠细菌群落在物种组成、网络结构和系统发育群体的生态过程方面存在显著差异。值得注意的是,与沙土相比,植物生境细菌群落网络表现出更大的稳定性和复杂性。零模型分析表明异质选择、扩散限制为细菌群落组合中的重要生态过程。【结论】本研究揭示了塔里木盆地3种类型土壤细菌群落的多样性和驱动因素,为进一步理解全球变化背景下的干旱区生态系统安全和稳定提供了数据资料和研究基础,促进了对干旱地区植物生境生态系统的脆弱性和组装过程的理解。[Background]As the largest inland basin in China,the Tarim Basin is a natural laboratory for studying the responses of bacterial communities to the environment on a local scale.Although researchers have studied the bacterial diversity in the Tarim Basin,few of them have studied the diversity and distribution pattern of bacterial communities in plant habitats of the Tarim Basin.[Objective]This study investigated and analyzed the diversity and distribution pattern of bacterial communities in plant habitats in the Tarim Basin,laying the foundation for subsequent research on bacterial ecology in the region.[Methods]We conducted a large-scale and systematic field survey and sampling of the soil in a plant habitat of the Tarim Basin to analyze the bacterial community structure and diversity.Furthermore,we explored the changes of soil bacterial diversity and community spatial pattern along geographic and climatic gradients on a large scale and the assembly process of phylogenetic groups at the continental level.[Results]The species composition,network structures,and assembly processes of bacterial communities showed significant differences between the plant habitat and the desert habitat.Notably,the soil bacterial communities in the plant habitat showed greater stability and complexity than those in the desert habitat.The null model analysis showed that heterogeneous selection and diffusion limitation were the key ecological processes in the bacterial community assembly.[Conclusion]This study reveals the diversity and driving factors of soil bacterial communities in three habitats of the Tarim Basin.The findings provide data and research basis for understanding the safety and stability of ecosystems in the arid zone in the context of global change and give insights into the fragility and assembly processes of plant habitat ecosystems in arid zones.

关 键 词：群落组装 零模型 群落多样性 距离衰减关系 共现网络 

分 类 号：S154.3[农业科学—土壤学]