干旱区生态环境知识资源中心(Arid): Soil properties rather than plant production strongly impact soil bacterial community diversity along a desertification gradient on the Tibetan Plateau

Arid

DOI	10.1111/grs.12269
	Soil properties rather than plant production strongly impact soil bacterial community diversity along a desertification gradient on the Tibetan Plateau
	Zong, Ning 1; Shi, Peili 1,2
通讯作者	Zong, Ning
来源期刊	GRASSLAND SCIENCE
ISSN	1744-6961
EISSN	1744-697X
出版年	2020
卷号	66 期号:4 页码:197-206
英文摘要	Grassland desertification is an important environmental issue that has detrimental impacts on the sustainable development of grasslands and human residential environments. Soil microbial community structure might dramatically change during desertification processes because microorganisms are one of the major drivers of ecological processes through their interactions with plants and soil. However, knowledge on the driving factors of microbial diversity changes during the desertification process in alpine grasslands is still lacking. Using a spatial sequence instead of a time successional sequence method, five desertification gradients in alpine steppe were chosen to investigate the changes in soil properties, plants and microbial communities during grassland desertification and to determine the factors that drive microbial community changes. Community coverage, species diversity indices and aboveground biomass gradually decreased from potential to severely heavy desertification gradients (HDs), while species richness and belowground biomass showed unimodal patterns (p < .05). Soil water content and total nitrogen showed gradual decreasing trends, while soil bulk density and gravel content showed opposite trends (p < .05). In addition, both the Shannon diversity index and the Chao1 richness index of soil bacteria increased gradually. The structural equation model showed that of the factors, soil total nitrogen (82.3% of total effect) and soil bulk density (41.4% of total effect) were the most important soil factors affecting soil bacterial diversity. However, community aboveground (43.4% of total effect) and belowground production (13.9% of total effect) were not the primary factors affecting soil microbial diversity. This result suggests that soil microbial diversity during grassland desertification is primarily driven by changes in soil properties, and the effects of vegetation composition and production are relatively small. These findings contribute to the mechanistic understanding of soil microbial diversity by linking changes in soil properties and plant production during desertification processes in alpine ecosystems.
英文关键词	alpine grassland desertification gradient driving factor plant production soil microbial diversity
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000505531400001
WOS关键词	BELOW-GROUND BIOMASS ; OXIDIZING BACTERIA ; ALPINE GRASSLANDS ; NITROGEN ADDITION ; ORGANIC-CARBON ; RESPONSES ; ECOSYSTEM ; DESERT ; LAND ; VEGETATION
WOS类目	Agriculture, Multidisciplinary ; Agronomy
WOS研究方向	Agriculture
EI主题词	2020-01-05
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312391
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Lhasa Natl Ecol Res Stn, 11A,Datun Rd, Beijing 100101, Peoples R China; 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zong, Ning,Shi, Peili. Soil properties rather than plant production strongly impact soil bacterial community diversity along a desertification gradient on the Tibetan Plateau[J]. 中国科学院地理科学与资源研究所,2020,66(4):197-206.
APA	Zong, Ning,&Shi, Peili.(2020).Soil properties rather than plant production strongly impact soil bacterial community diversity along a desertification gradient on the Tibetan Plateau.GRASSLAND SCIENCE,66(4),197-206.
MLA	Zong, Ning,et al."Soil properties rather than plant production strongly impact soil bacterial community diversity along a desertification gradient on the Tibetan Plateau".GRASSLAND SCIENCE 66.4(2020):197-206.