IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Stoichiometry of soil microbial biomass carbon and microbial biomass nitrogen in China's temperate and alpine grasslands
Zhao, Huan1,2; Sun, Jian2; Xu, Xingliang2; Qin, Xiaojing3
2017-11-01
Source PublicationEUROPEAN JOURNAL OF SOIL BIOLOGY
ISSN1164-5563
Volume83Pages:1-8
SubtypeArticle
AbstractSoil microorganisms play a key role in terrestrial ecological processes, especially in soil organic matter (SOM) formation and nutrient recycling. To perform these essential functions, microbes require mineral nutrients and labile C from the soil solution in amounts that roughly follow the Redfield ratio. However, it remains unclear how soil microorganisms maintain their C:N stoichiometry in grassland ecosystems. Here, we explored the patterns of microbial biomass C (MBC) and N (MBN), along with their controlling factors, using published data on alpine and temperate grasslands across northwestern China (from Inner Mongolia to Tibet). We tested the hypothesis that soil microbial biomass is more sensitive to climate factors than to edaphic factors. The results showed that MBC (670.0 mg kg(-1)), MBN (78.5 mg kg(-1)), and the ratio of MBC to MBN (10.9:1) in alpine grasslands were greater than in temperate grasslands (MBC = 317.4 mg kg(-1), MBN = 59.9 mg kg(-1), MBC:MBN = 6.2:1). Soil MBC in temperate grasslands had a stronger relationship with MBN (y = 0.83x - 0.33, r(2) = 0.53, p < 0.01) than in alpine grasslands (y = 0.62x + 0.09, r(2) = 0.29, p < 0.01). Climate factors were more sensitive than edaphic factors for MBC and MBN in both grasslands, but climate factors explained only 26% of the variation. These findings demonstrate that climate generally affects microbial C:N stoichiometry more strongly than do edaphic factors in alpine and temperate grasslands. However, some biotic factors could be more influential than climatic factors, necessitating further investigation. (C) 2017 Elsevier Masson SAS. All rights reserved.
KeywordMicrobial Biomass Carbon Microbial Biomass Nitrogen Climatic Factors Edaphic Factors Alpine Grasslands Temperate Grasslands
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.ejsobi.2017.09.007
WOS Subject ExtendedEnvironmental Sciences & Ecology ; Agriculture
Indexed BySCI
WOS KeywordCLIMATE-CHANGE ; ENVIRONMENTAL-FACTORS ; SEMIARID GRASSLAND ; TIBETAN PLATEAU ; INNER-MONGOLIA ; SURFACE SOILS ; MICROORGANISMS ; ECOSYSTEM ; PLANTS ; ROOTS
Language英语
WOS SubjectEcology ; Soil Science
WOS IDWOS:000418988200001
Funding OrganizationState Key Research Development Program of China(2016YFC0501803 ; National Natural Science Foundation of China(41501057) ; Youth Innovation Research Team Project(LENOM2016Q0003) ; Construction Service Program for Cultivating Feature Institution of the Chinese Academy of Sciences(TSYJS05) ; 2016YFC0501802)
PublisherELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/20813
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorSun, Jian
Affiliation1.Chengdu Univ Technol, Chengdu 610000, Sichuan, Peoples R China
2.Chinese Acad Sci, Synth Res Ctr Chinese Ecosyst Res Network, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610000, Sichuan, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Huan,Sun, Jian,Xu, Xingliang,et al. Stoichiometry of soil microbial biomass carbon and microbial biomass nitrogen in China's temperate and alpine grasslands[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2017,83:1-8.
APA Zhao, Huan,Sun, Jian,Xu, Xingliang,&Qin, Xiaojing.(2017).Stoichiometry of soil microbial biomass carbon and microbial biomass nitrogen in China's temperate and alpine grasslands.EUROPEAN JOURNAL OF SOIL BIOLOGY,83,1-8.
MLA Zhao, Huan,et al."Stoichiometry of soil microbial biomass carbon and microbial biomass nitrogen in China's temperate and alpine grasslands".EUROPEAN JOURNAL OF SOIL BIOLOGY 83(2017):1-8.
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