干旱区生态环境知识资源中心(Arid): Change of soil physicochemical properties, bacterial community and aggregation during desertification of grasslands in the Tibetan Plateau

Arid

DOI	10.1111/ejss.12939
	Change of soil physicochemical properties, bacterial community and aggregation during desertification of grasslands in the Tibetan Plateau
	Zhang, Nannan; Zhong, Bo; Zhao, Chunzhang; Wang, Entao; Wang, Yanjie; Chen, Dongming; Shi, Fusun
通讯作者	Zhang, NN (corresponding author), Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China.
来源期刊	EUROPEAN JOURNAL OF SOIL SCIENCE
ISSN	1351-0754
EISSN	1365-2389
出版年	2021
卷号	72 期号:1 页码:274-288
英文摘要	The aim of this study was to evaluate the relationships among changes in the soil microstructure, soil physicochemical traits and microbial communities during desertification. Soil samples were collected from grasslands at different stages of desertification, from an area of the Tibetan Plateau. Soil aggregate fractionation and soil physicochemical properties were analysed using standard methods, and the abundance and diversity of bacteria associated with different aggregate fractions were estimated by quantitative PCR and Illumina Miseq amplicon sequencing. Sequential changes in response to desertification stages were detected in the analysed features. For instance, soil nutrients, microbial biomass C and N, water content and pH initially changed during the light desertification stage; then, the soil aggregation decreased during the intermediate stages; and finally, bacterial abundance and diversity decreased during heavy and severe desertification stages. During grassland desertification, vegetation coverage positively influenced soil aggregation by affecting soil properties (e.g., pH and SOC), whereas bacterial communities in FMi (free microaggregates) and FSC (free silt and clay) were negatively related to soil aggregation. This study reports novel information concerning the desertification process and the sequential modification of soil traits and interactions among soil physical properties (aggregate composition), soil nutrients and the soil microbial community in the grasslands of the Tibetan Plateau. Highlights Bacterial community was more sensitive in macroaggregates than in microaggregates. Composition of small macroaggregates and associated bacteria changed during desertification. Bacterial community in microaggregates, silt and clay negatively affected aggregation. Vegetation coverage affected aggregation by changing soil traits and bacterial community.
英文关键词	bacterial community desertification grassland soil aggregation Tibetan Plateau
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000604564100025
WOS关键词	ORGANIC-MATTER ; MICROBIAL BIOMASS ; AEOLIAN DESERTIFICATION ; DIVERSITY ; STRATIFICATION ; FERTILIZATION ; DEGRADATION ; VEGETATION ; DYNAMICS ; FEATURES
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/347878
作者单位	[Zhang, Nannan; Zhao, Chunzhang; Shi, Fusun] Chinese Acad Sci, Chengdu Inst Biol, Chengdu, Peoples R China; [Zhang, Nannan; Zhao, Chunzhang; Shi, Fusun] Chinese Acad Sci, Chengdu Inst Biol, Key Lab Sichuan Prov, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu, Peoples R China; [Wang, Entao] Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Mexico City, DF, Mexico; [Wang, Yanjie] Sichuan Normal Univ, Coll Life Sci, Chengdu, Peoples R China; [Chen, Dongming] Sichuan Ganzi Tibetan Autonomous Prefecture Inst, Kangding, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Nannan,Zhong, Bo,Zhao, Chunzhang,et al. Change of soil physicochemical properties, bacterial community and aggregation during desertification of grasslands in the Tibetan Plateau[J],2021,72(1):274-288.
APA	Zhang, Nannan.,Zhong, Bo.,Zhao, Chunzhang.,Wang, Entao.,Wang, Yanjie.,...&Shi, Fusun.(2021).Change of soil physicochemical properties, bacterial community and aggregation during desertification of grasslands in the Tibetan Plateau.EUROPEAN JOURNAL OF SOIL SCIENCE,72(1),274-288.
MLA	Zhang, Nannan,et al."Change of soil physicochemical properties, bacterial community and aggregation during desertification of grasslands in the Tibetan Plateau".EUROPEAN JOURNAL OF SOIL SCIENCE 72.1(2021):274-288.