气候变化领域集成服务门户(CCPortal): Edaphic factors control microbial biomass and elemental stoichiometry in alpine meadow soils of the Tibet Plateau

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DOI	10.1007/s11104-024-06578-x
	Edaphic factors control microbial biomass and elemental stoichiometry in alpine meadow soils of the Tibet Plateau
	Zhang, Yun; Yang, Yongsheng; Osborne, Bruce; Zhou, Huakun; Wu, Juying; Zhang, Weiwei; Zou, Junliang
发表日期	2024
ISSN	0032-079X
EISSN	1573-5036
英文摘要	Background and aimsMany meadows are experiencing severe degradation due to the effects of global climate change and other human-related activity, especially overgrazing. The impact of grazing may however vary in different sites, but the dynamics and mechanisms associated with grazing-related meadow degradation on soil microbial biomass structure and function in different locations are still unclear.MethodsTo address this we examined three alpine meadows with different grazing sites in northwest China, which included grazing in winter and summer, in each of which there were four degradation gradients, varying from no degradation to severe degradation.ResultsAt the Maqin site, grazing during the summer resulted in higher concentrations of microbial carbon (MBC), nitrogen (MBN), and phosphorus (MBP) compared to grazing during winter. Undegraded meadows (ND) also had higher MBC concentrations compared to low (LD), medium (MD), or severely degraded (SD) ones at the three sites. However, the homeostasis analysis revealed that the elemental stoichiometries were strictly controlled, despite significant degradation-related effects on the concentrations of MBC, MBN, and MBP, indicating relatively stable coupling relationships among C, N, and P.ConclusionThe random forest and partitioning variation analyses showed that edaphic factors play the more important roles in regulating microbial biomass and elemental composition in the different sites. Overall, these results suggest that the effects of degradation on soil microbial biomass concentrations and the stoichiometries are context dependent, particularly with regard to the impact of background soil properties, demonstrating that site conditions must be considered when predicting how grassland ecosystems will respond to grazing-related degradation.
英文关键词	Grazing; Soil degradation; Microbial biomass; Elemental stoichiometries; Alpine meadow; Grassland; Homeostasis
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS记录号	WOS:001176803000006
来源期刊	PLANT AND SOIL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/308969
作者单位	Beijing Academy of Agriculture & Forestry Sciences (BAAFS); Chinese Academy of Sciences; University College Dublin; University College Dublin
推荐引用方式 GB/T 7714	Zhang, Yun,Yang, Yongsheng,Osborne, Bruce,et al. Edaphic factors control microbial biomass and elemental stoichiometry in alpine meadow soils of the Tibet Plateau[J],2024.
APA	Zhang, Yun.,Yang, Yongsheng.,Osborne, Bruce.,Zhou, Huakun.,Wu, Juying.,...&Zou, Junliang.(2024).Edaphic factors control microbial biomass and elemental stoichiometry in alpine meadow soils of the Tibet Plateau.PLANT AND SOIL.
MLA	Zhang, Yun,et al."Edaphic factors control microbial biomass and elemental stoichiometry in alpine meadow soils of the Tibet Plateau".PLANT AND SOIL (2024).