Variation of soil microbial carbon use efficiency (CUE) and its Influence mechanism in the context of global environmental change: a review

PeerJ

article

Samuel Adingo¹  Jie-Ru Yu²  Liu Xuelu²  Xiaodan Li³  Sun Jing²  Zhang Xiaong¹ 

[1] College of Forestry, Gansu Agricultural University;College of Resources and Environment, Gansu Agricultural University;School of Management, Gansu Agricultural University

关键词: Carbon utilization efficiency;    Soil microorganisms;    Ecological stoichiometry;    Microbial community;    Nutrient limitation;   

DOI  :  10.7717/peerj.12131

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Soil microbial carbon utilization efficiency (CUE) is the efficiency with which microorganisms convert absorbed carbon (C) into their own biomass C, also referred to as microorganism growth efficiency. Soil microbial CUE is a critical physiological and ecological parameter in the ecosystem’s C cycle, influencing the processes of C retention, turnover, soil mineralization, and greenhouse gas emission. Understanding the variation of soil microbial CUE and its influence mechanism in the context of global environmental change is critical for a better understanding of the ecosystem’s C cycle process and its response to global changes. In this review, the definition of CUE and its measurement methods are reviewed, and the research progress of soil microbial CUE variation and influencing factors is primarily reviewed and analyzed. Soil microbial CUE is usually expressed as the ratio of microbial growth and absorption, which is divided into methods based on the microbial growth rate, microbial biomass, substrate absorption rate, and substrate concentration change, and varies from 0.2 to 0.8. Thermodynamics, ecological environmental factors, substrate nutrient quality and availability, stoichiometric balance, and microbial community composition all influence this variation. In the future, soil microbial CUE research should focus on quantitative analysis of trace metabolic components, analysis of the regulation mechanism of biological-environmental interactions, and optimization of the carbon cycle model of microorganisms’ dynamic physiological response process.

【 授权许可】

CC BY