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Soil Microbial Metabolic Quotient in Inner Mongolian Grasslands: Patterns and Influence Factors

文献类型：期刊论文

作者Cao Yingqiu1; Xu Li2; Zhang Zhen1; Chen Zhi2; He Nianpeng2,3,4,5
刊名CHINESE GEOGRAPHICAL SCIENCE
出版日期2019-12-01
卷号29期号:6页码:1001-1010
关键词soil respiration soil microbial biomass carbon precipitation temperature Inner Mongolian grassland
ISSN号1002-0063
DOI10.1007/s11769-019-1084-5
通讯作者Xu Li(xuli@igsnrr.ac.cn) ; Zhang Zhen(xjzhangzhen@163.com)
英文摘要Microbial metabolic quotient (MMQ) is the rate of soil microbial respiration per unit of microbial biomass, and represents the capacity of soil microbes to utilize soil organic matter. Understanding the regional variation and determinants of MMQ can help predict the responses of soil respiration rate to global climate change. Accordingly, we measured and analyzed MMQ-related data (e.g., soil basic respiration rate at 20 degrees C and soil microbial biomass) from 17 grassland sites, which located in meadow steppe, typical steppe, and desert steppe along a 1000-km transect across the Inner Mongolian grasslands, China. Results showed that MMQ varied significantly among the different grassland types (P < 0.05; desert > typical > meadow) and decreased from southwest to northeast (r = - 0.81) with increasing latitude (r = - 0.50), and with increasing mean annual precipitation (r = - 0.69). Precipitation accounted for 56% of the total variation in MMQ, whereas temperature accounted for 26%. MMQ was negatively correlated with precipitation across the Inner Mongolian grasslands. Therefore, climate change, especially in regard to precipitation, may influence soil microbial respiration and soil carbon dynamics through altering MMQ. These results highlighted the importance of spatial patterns in MMQ for accurately evaluating the responses of soil respiration to climate change at regional and global scales.
WOS关键词ORGANIC-MATTER DECOMPOSITION ; TEMPERATURE SENSITIVITY ; ENZYME-ACTIVITIES ; BIOMASS ; RESPIRATION ; PRECIPITATION ; COMMUNITIES ; TURNOVER ; CARBON ; MINERALIZATION
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000501500500008
出版者SPRINGER
源URL[http://ir.igsnrr.ac.cn/handle/311030/130322]  
专题中国科学院地理科学与资源研究所
通讯作者Xu Li; Zhang Zhen
作者单位1.Anhui Agr Univ, Resources & Environm Coll, Hefei 230036, Anhui, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
4.Northeast Normal Univ, Inst Grassland Sci, Changchun 130024, Jilin, Peoples R China
5.Minist Educ, Key Lab Vegetat Ecol, Changchun 130024, Jilin, Peoples R China
推荐引用方式
GB/T 7714		 Cao Yingqiu,Xu Li,Zhang Zhen,et al. Soil Microbial Metabolic Quotient in Inner Mongolian Grasslands: Patterns and Influence Factors[J]. CHINESE GEOGRAPHICAL SCIENCE,2019,29(6):1001-1010.
APA Cao Yingqiu,Xu Li,Zhang Zhen,Chen Zhi,&He Nianpeng.(2019).Soil Microbial Metabolic Quotient in Inner Mongolian Grasslands: Patterns and Influence Factors.CHINESE GEOGRAPHICAL SCIENCE,29(6),1001-1010.
MLA Cao Yingqiu,et al."Soil Microbial Metabolic Quotient in Inner Mongolian Grasslands: Patterns and Influence Factors".CHINESE GEOGRAPHICAL SCIENCE 29.6(2019):1001-1010.

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来源：地理科学与资源研究所

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