摘要
【目的】了解敦煌盆地周边典型植物群落微生物群落结构特征及其影响因素。【方法】以甘肃省敦煌市三道泉典型植物群落为研究对象,选择芦苇(Phragmites australis,P)、甘草(Glycyrrhiza uralensis,G)、骆驼刺(Alhagi camelorum,A)3种典型植物群落,并以裸地(C)作为对照,基于高通量测序技术研究典型植物群落土壤微生物群落结构特征与影响因素。【结果】研究区内的植被通过改变土壤理化性质影响了土壤微生物群落组成和多样性。植被类型对土壤真菌丰富度和细菌丰富度的影响各异,甘草提高了土壤真菌和细菌多样性,芦苇和骆驼刺仅提高了土壤细菌多样性。甘草群落与骆驼刺群落土壤真菌和细菌群落结构均相似。芦苇群落土壤真菌群落结构的主要驱动因素为碱性磷酸酶、脲酶和碱解氮;甘草和骆驼刺群落土壤真菌群落结构的主要驱动因素为有效磷;裸地土壤真菌群落结构的主要驱动因素为土壤pH。芦苇、甘草和骆驼刺群落土壤细菌群落结构的主要驱动因素分别为脲酶和有效磷,而裸地土壤细菌群落结构的主要驱动因素是土壤pH。【结论】揭示了三道泉区域典型植物群落土壤微生物多样性、群落结构分布特征及其主要驱动因素,可以为该区域干旱区荒漠化防治与植被恢复提供理论依据。
【Objective】Our aim is to understand the structural characteristics of microbial communities in typical plant communities around the Dunhuang Basin and the factors affecting them.【Method】Taking the typical plant community in Sandaoquan Region of Dunhuang City,Gansu Province as the research object,three typical plant communities of Phragmites australis(P),Glycyrrhiza uralensis(G)and Alhagi camelorum(A)were selected,and bare ground(C)was used as the control,based on high-throughput sequencing technology to study the structural characteristics and influencing factors of the soil microbial community of the typical plant communities.【Result】Vegetation in the study area affected soil microbial community composition and diversity by changing soil physicochemical properties,and different vegetation types had different effects on soil fungal and bacterial abundance,with G.uralensis increasing soil fungal and bacterial diversity while P.australis and A.camelorum only increased soil bacterial diversity.The soil fungal and bacterial community structure was similar in both the G.uralensis and A.camelorum communities,with alkaline phosphatase,urease and alkali-hydrolyzable nitrogen as the main drivers of soil fungal community structure in the P.australis community;available phosphorus as the main driver of soil fungal community structure in the G.uralensis and A.camelorum communities;and soil pH value as the main driver of soil fungal community structure in the bare ground.Soil bacterial community structure of P.australis,G.uralensis and A.camelorum communities was mainly driven by urease and available phosphorus,respectively,while soil pH value was the main driver of soil bacterial community structure of bare ground.【Conclusion】The soil microbial diversity and community structure distribution characteristics of typical plant communities in the Sandaoquan region and their main driving factors were revealed,which can provide theoretical basis for land desertification control and vegetation restoration in the arid zone of the region.
作者
岳雪娇
黄沛
李永华
朱躲萍
姚斌
扆凡
纪署光
黄占军
Yue Xuejiao;Huang Pei;Li Yonghua;Zhu Duoping;Yao Bin;Yi Fan;Ji Shuguang;Huang Zhanjun(Institute of Desertification Studies,Chinese Academy of Forestry,Beijing 100091,China;Institute of Ecological Conservation and Restoration,Chinese Academy of Forestry,Beijing 100091,China;State Forestry Administration Dunhuang Desert Ecosystem Location Research Station,Dunhuang 736200,China;National Forestry Bureau’s Kumtage Desert Ecosystem Location Research Station,Dunhuang 736200,China;Saibei Forest Farm,Zhangjiakou 075000,China)
出处
《陆地生态系统与保护学报》
2023年第3期37-47,共11页
Terrestrial Ecosystem and Conservation
基金
“十三五”国家重点研发计划项目课题(2020YFF0305905)
中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2020ZE005)。
关键词
敦煌三道泉
典型植物群落
土壤微生物
分布特征
驱动因素
Sandaoquan Region of Dunhuang
typical plant community
soil microorganism
distribution characteristics
driving factors
