气候变化领域集成服务门户(CCPortal): Excessive climate warming exacerbates nitrogen limitation on microbial metabolism in an alpine meadow of the Tibetan Plateau: Evidence from soil ecoenzymatic stoichiometry

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DOI	10.1016/j.scitotenv.2024.172731
	Excessive climate warming exacerbates nitrogen limitation on microbial metabolism in an alpine meadow of the Tibetan Plateau: Evidence from soil ecoenzymatic stoichiometry
	Cai, Mengke; Zhang, Yangjian; Zhao, Guang; Zhao, Bo; Cong, Nan; Zhu, Juntao; Zheng, Zhoutao; Wu, Wenjuan; Duan, Xiaoqing
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	930
卷号	930
英文摘要	Soil ecoenzymatic stoichiometry reflects the dynamic equilibrium between microorganism's nutrient requirements and resource availability. However, uncertainties persist regarding the key determinants of nutrient restriction in relation to microbial metabolism under varying degrees of warming. Our long-term and multi-level warming field experiment (control treatment, +0.42 degrees C, +1.50 degrees C, +2.55 degrees C) in a typical alpine meadow unveiled a decline in carbon (C)- and nitrogen (N)-acquired enzymes with escalating warming magnitudes, while phosphorus (P)-acquired enzymes displayed an opposite trend. Employing enzymatic stoichiometry modeling, we assessed the nutrient limitations of microbial metabolic activity and found that C and N co-limited microbial metabolic activities in the alpine meadow. Remarkably, high-level warming (+2.55 degrees C) exacerbated microbe N limitation, but alleviate C limitations. The structural equation modeling further indicated that alterations in soil extracellular enzyme characteristics (SES) were more effectively elucidated by microbial characteristics (microbial biomass C, N, P, and their ratios) rather than by soil nutrients (total nutrient contents and their ratios). However, the microbial control over SES diminished with higher levels of warming magnitude. Overall, our results provided novel evidence that the factors driving microbe metabolic limitation may vary with the degree of warming in Tibet alpine grasslands. Changes in nutrient demand for microorganism ' s metabolism in response to warming should be considered to improve nutrient management in adapting to different future warming scenarios.
英文关键词	Microbial metabolism; Ecoenzymatic stoichiometry; High level warming; Enzyme vector model; Tibetan plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001237450600001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/299075
作者单位	Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS
推荐引用方式 GB/T 7714	Cai, Mengke,Zhang, Yangjian,Zhao, Guang,et al. Excessive climate warming exacerbates nitrogen limitation on microbial metabolism in an alpine meadow of the Tibetan Plateau: Evidence from soil ecoenzymatic stoichiometry[J],2024,930.
APA	Cai, Mengke.,Zhang, Yangjian.,Zhao, Guang.,Zhao, Bo.,Cong, Nan.,...&Duan, Xiaoqing.(2024).Excessive climate warming exacerbates nitrogen limitation on microbial metabolism in an alpine meadow of the Tibetan Plateau: Evidence from soil ecoenzymatic stoichiometry.SCIENCE OF THE TOTAL ENVIRONMENT,930.
MLA	Cai, Mengke,et al."Excessive climate warming exacerbates nitrogen limitation on microbial metabolism in an alpine meadow of the Tibetan Plateau: Evidence from soil ecoenzymatic stoichiometry".SCIENCE OF THE TOTAL ENVIRONMENT 930(2024).