DOI: 10.1007/s10533-016-0191-y
Scopus记录号: 2-s2.0-84959476104
论文题名: Microbial carbon use efficiency: accounting for population, community, and ecosystem-scale controls over the fate of metabolized organic matter
作者: Geyer K.M. ; Kyker-Snowman E. ; Grandy A.S. ; Frey S.D.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 127, 期: 2018-02-03 起始页码: 173
结束页码: 188
语种: 英语
英文关键词: Carbon cycling
; Carbon use efficiency
; Microbial ecology
; Microbial metabolism
Scopus关键词: biogeochemistry
; biomass
; carbon flux
; carbon sequestration
; community dynamics
; growth rate
; metabolism
; microbial activity
; microbial ecology
; population dynamics
; soil microorganism
; soil organic matter
; spatiotemporal analysis
; terrestrial environment
; thermodynamics
英文摘要: Microbial carbon use efficiency (CUE) is a critical regulator of soil organic matter dynamics and terrestrial carbon fluxes, with strong implications for soil biogeochemistry models. While ecologists increasingly appreciate the importance of CUE, its core concepts remain ambiguous: terminology is inconsistent and confusing, methods capture variable temporal and spatial scales, and the significance of many fundamental drivers remains inconclusive. Here we outline the processes underlying microbial efficiency and propose a conceptual framework that structures the definition of CUE according to increasingly broad temporal and spatial drivers where (1) CUEP reflects population-scale carbon use efficiency of microbes governed by species-specific metabolic and thermodynamic constraints, (2) CUEC defines community-scale microbial efficiency as gross biomass production per unit substrate taken up over short time scales, largely excluding recycling of microbial necromass and exudates, and (3) CUEE reflects the ecosystem-scale efficiency of net microbial biomass production (growth) per unit substrate taken up as iterative breakdown and recycling of microbial products occurs. CUEE integrates all internal and extracellular constraints on CUE and hence embodies an ecosystem perspective that fully captures all drivers of microbial biomass synthesis and decay. These three definitions are distinct yet complementary, capturing the capacity for carbon storage in microbial biomass across different ecological scales. By unifying the existing concepts and terminology underlying microbial efficiency, our framework enhances data interpretation and theoretical advances. © 2016, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83413
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: Department of Natural Resources & the Environment, University of New Hampshire, Durham, NH, United States
Recommended Citation:
Geyer K.M.,Kyker-Snowman E.,Grandy A.S.,et al. Microbial carbon use efficiency: accounting for population, community, and ecosystem-scale controls over the fate of metabolized organic matter[J]. Biogeochemistry,2016-01-01,127(2018-02-03)