DOI: 10.1007/s10533-016-0217-5
Scopus记录号: 2-s2.0-84969793985
论文题名: Eco-enzymatic stoichiometry and enzymatic vectors reveal differential C, N, P dynamics in decaying litter along a land-use gradient
作者: Fanin N. ; Moorhead D. ; Bertrand I.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 129, 期: 2018-01-02 起始页码: 21
结束页码: 36
语种: 英语
英文关键词: Decomposition
; Extracellular enzymes
; Microbial metabolism
; Soil microorganisms
; Stoichiometry
Scopus关键词: bacterium
; carbon
; decomposition
; environmental gradient
; enzyme activity
; fungus
; land use
; litter
; metabolism
; microbial activity
; microbial community
; nitrogen
; nutrient dynamics
; phosphorus
; soil microorganism
; stoichiometry
; Bacteria (microorganisms)
; Fagus sylvatica
; Festuca arundinacea
; Fungi
; Robinia pseudoacacia
; Triticum aestivum
英文摘要: To evaluate carbon (C), nitrogen (N), and phosphorus (P) dynamics during the decomposition process, we investigated the temporal variability of extracellular enzymatic activities (EEA) associated with C, N, and P acquisition in microbial communities from different land uses. We hypothesized that EEA ratios would reveal different primary resource requirements with respect to microbial demand, depending on soil properties, litter type and the relative proportion of bacteria:fungi in the microbial community. To test this hypothesis, we implemented an experiment using four litters (Triticum aestivum, Fagus sylvatica,Festuca arundinacea and Robinia pseudoacacia) in four soils (cropland, plantation, prairie and forest) located in close proximity to one another on the same parent material. Analyses of EEA showed that overall N requirement increased relative to P during litter decay, but C requirement increased more rapidly than either N or P in most of these ecosystems. Soil type was the main factor controlling N versus P requirement whereas litter type was the primary driver of C versus nutrient requirement. Shifts in EEA were related to changes in metabolic quotient (C respired per unit biomass) but there was no evidence that the relative proportion of fungi:bacteria drove changes in EEA. We concluded that the use of EEA as a proxy of microbial resource demand improved our understanding of temporal shifts in resource requirements to microbial communities, their associated respiration efficiency and dynamics of C and nutrients among different ecosystems. © 2016, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83381
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: INRA, UMR 614 FARE, 2 Esplanade Roland Garros, Reims, France; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden; Department of Environmental Science, University of Toledo, Toledo, OH, United States; INRA, UMR 1222 Eco&Sols, 2 Place Viala, Montpellier, France
Recommended Citation:
Fanin N.,Moorhead D.,Bertrand I.. Eco-enzymatic stoichiometry and enzymatic vectors reveal differential C, N, P dynamics in decaying litter along a land-use gradient[J]. Biogeochemistry,2016-01-01,129(2018-01-02)