气候变化领域集成服务门户(CCPortal): The stoichiometry of soil microbial biomass determines metabolic quotient of nitrogen mineralization

CCPortal

DOI	10.1088/1748-9326/ab6a26
	The stoichiometry of soil microbial biomass determines metabolic quotient of nitrogen mineralization
	Li Z.; Zeng Z.; Tian D.; Wang J.; Fu Z.; Wang B.; Tang Z.; Chen W.; Chen H.Y.H.; Wang C.; Yi C.; Niu S.
发表日期	2020
ISSN	17489318
卷号	15 期号:3
英文摘要	Soil nitrogen (N) mineralization is crucial for the sustainability of available soil N and hence ecosystem productivity and functioning. Metabolic quotient of N mineralization (Q min), which is defined as net soil N mineralization per unit of soil microbial biomass N, reflects the efficiency of soil N mineralization. However, it is far from clear how soil Q min changes and what are the controlling factors at the global scale. We compiled 871 observations of soil Q min from 79 published articles across terrestrial ecosystems (croplands, forests, grasslands, and wetlands) to elucidate the global variation of soil Q min and its predictors. Soil Q min decreased from the equator to two poles, which was significant in the North Hemisphere. Soil Q min correlated negatively with soil pH, total soil N, the ratio of soil carbon (C) to N, and soil microbial biomass C, and positively with mean annual temperature and C:N ratio of soil microbial biomass at a global scale. Soil microbial biomass, climate, and soil physical and chemical properties in combination accounted for 41% of the total variations of global soil Q min. Among those predictors, C:N ratio of soil microbial biomass was the most important factor contributing to the variations of soil Q min (the standardized coefficient = 0.39) within or across ecosystem types. This study emphasizes the critical role of microbial stoichiometry in soil N cycling, and suggests the necessity of incorporating soil Q min into Earth system models to better predict N cycling under environmental change. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	dominant driver; global warming; metabolic quotient; natural ecosystems; nitrogen cycling; stoichiometry of microbial biomass
语种	英语
scopus关键词	Biomass; Ecosystems; Forestry; Global warming; Metabolism; Mineralogy; Nitrogen; Stoichiometry; Sustainable development; dominant driver; Metabolic quotient; Microbial biomass; Natural ecosystem; Nitrogen cycling; Soils; ecosystem function; global warming; metabolism; microbial activity; mineralization; nitrogen cycle; physicochemical property; soil carbon; soil ecosystem; soil microorganism; soil nitrogen; stoichiometry
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154181
作者单位	Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Key Laboratory of Agricultural Environment in Universities of Shandong, College of Resources and Environment, Shandong Agricultural University, Taian, 271018, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China; Faculty of Natural Resources Management, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada; State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China; School of Earth and Environmental Sciences, Queens College of the City University of New YorkNY 11367, United States
推荐引用方式 GB/T 7714	Li Z.,Zeng Z.,Tian D.,et al. The stoichiometry of soil microbial biomass determines metabolic quotient of nitrogen mineralization[J],2020,15(3).
APA	Li Z..,Zeng Z..,Tian D..,Wang J..,Fu Z..,...&Niu S..(2020).The stoichiometry of soil microbial biomass determines metabolic quotient of nitrogen mineralization.Environmental Research Letters,15(3).
MLA	Li Z.,et al."The stoichiometry of soil microbial biomass determines metabolic quotient of nitrogen mineralization".Environmental Research Letters 15.3(2020).