DOI: 10.1016/j.scitotenv.2019.135413
论文题名: Ecoenzymatic stoichiometry and microbial nutrient limitations in rhizosphere soil along the Hailuogou Glacier forefield chronosequence
作者: Li Q. ; Liu Y. ; Gu Y. ; Guo L. ; Huang Y. ; Zhang J. ; Xu Z. ; Tan B. ; Zhang L. ; Chen L. ; Xiao J. ; Zhu P.
刊名: Science of the Total Environment
ISSN: 489697
出版年: 2020
卷: 704 语种: 英语
英文关键词: Ecoenzymatic stoichiometry
; Glacier chronosequence
; Microbial nutrient limitation
; Rhizosphere
Scopus关键词: Bacteria
; Ecosystems
; Enzyme activity
; Fatty acids
; Global warming
; Nitrogen
; Nutrients
; Organic carbon
; Phospholipids
; Plants (botany)
; Stoichiometry
; Chronosequences
; Dissolved organic carbon
; Microbial community structures
; Nitrogen and phosphorus
; Nutrient limitations
; Phospholipid fatty acids
; Rhizosphere
; Rhizosphere microbial communities
; Soils
; acetylglucosaminidase
; beta glucosidase
; carbon
; catechol oxidase
; cellulose 1,4 beta cellobiosidase
; cytosol aminopeptidase
; dissolved organic matter
; fatty acid
; nitrogen
; organic carbon
; peroxidase
; chronosequence
; community structure
; enzyme activity
; glacier
; microbial community
; nutrient limitation
; rhizosphere
; stoichiometry
; Article
; biogeochemical cycling
; carbon cycling
; China
; chronosequence
; community structure
; controlled study
; correlation analysis
; ecoenzymatic stoichiometry
; enzyme activity
; glacier
; Hailuogou Glacier
; microbial activity
; microbial biomass
; microbial community
; microbial nutrient limitation
; microbiological phenomena and functions
; nitrogen cycling
; nonhuman
; nutrient limitation
; phosphorus cycling
; Populus
; Populus purdomii
; priority journal
; redundancy analysis
; rhizosphere
; rhizospheric microorganism
; soil
; soil analysis
; soil microflora
; soil property
; spatial analysis
; stoichiometry
; trend study
; China
; Hailuogou Glacier
; Sichuan
; Bacteria (microorganisms)
; Populus
英文摘要: Mountain glaciers retreat at an increased rate under global warming, resulting in exposed barren surfaces for primary succession. Soil microbes are an important driver of ecosystem processes. Although variations in soil microbes after deglaciation have been studied extensively, the roles of rhizosphere soil microbes in the biogeochemistry cycle during primary succession are less understood. In this study, Populus purdomii was present throughout the 123-year chronosequence as a representative tree species. We therefore investigated variations in the rhizosphere enzyme activity, microbial community structure, and ecoenzymatic stoichiometry of P. purdomii along Hailuogou Glacier chronosequences. The objective was to determine changes in rhizosphere enzyme activities and microbial communities, as well as the effects of nutrient limitation on rhizosphere microbes. According to the results, the enzyme activities and microbial group biomass in rhizosphere soil all showed a bimodal trend and were highest at the 43rd or 123rd year, and enzyme activity varied with succession time but not microbial community structure. The rhizosphere soil bacterial community was the dominant community during the 123-year chronosequence. Ecoenzymatic stoichiometry indicated nitrogen restrictions on microbial activity throughout primary succession, with early succession stages (5–15 years) showing greater carbon restriction than late succession stages. Moreover, redundancy and correlation analyses demonstrated that soil microbial phospholipid fatty acid biomass was an important factor for increases in enzyme activities and that enzyme activities in turn played important roles in carbon, nitrogen and phosphorus cycling in rhizosphere soil. Additionally, rhizosphere soil microbial development significantly affected soil organic carbon, total nitrogen and dissolved organic carbon accumulation. Overall, our study links the rhizosphere microbial community and activity to successional chronosequences, providing a deeper understanding of the dynamics of ecosystem succession. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159232
Appears in Collections: 气候变化与战略
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作者单位: Key Laboratory of Ecological Forestry Engineering of Sichuan Province, Institute of Ecology & Forests, Sichuan Agricultural University, Chengdu, 611130, China; Department of Microbiology, College of Resource Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China; College of Landscape Architecture, Sichuan Agricultural University, Chengdu, 611130, China; Key Laboratory of Southwest China Wildlife Resources Conservation, Ministry of Education, Nanchong, Sichuan 637009, China
Recommended Citation:
Li Q.,Liu Y.,Gu Y.,et al. Ecoenzymatic stoichiometry and microbial nutrient limitations in rhizosphere soil along the Hailuogou Glacier forefield chronosequence[J]. Science of the Total Environment,2020-01-01,704