DOI: 10.1111/ele.12487
Scopus记录号: 2-s2.0-84941022537
论文题名: Thermodynamic constraints on the utility of ecological stoichiometry for explaining global biogeochemical patterns
作者: Helton A.M. ; Ardón M. ; Bernhardt E.S.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2015
卷: 18, 期: 10 起始页码: 1049
结束页码: 1056
语种: 英语
英文关键词: Carbon
; Dissimilatory microbial metabolism
; Nitrate
; Nitrogen
; Organismal stoichiometry
; Reduction-oxidation reactions
Scopus关键词: ammonium
; biogeochemical cycle
; biomass
; carbon
; concentration (composition)
; global change
; metabolism
; microbial community
; nitrate
; nitrogen
; oxidation
; reduction
; stoichiometry
; thermodynamics
; ammonium derivative
; nitric acid derivative
; biomass
; carbon cycle
; chemistry
; ecosystem
; microbiology
; nitrogen cycle
; thermodynamics
; Ammonium Compounds
; Biomass
; Carbon Cycle
; Ecosystem
; Nitrates
; Nitrogen Cycle
; Thermodynamics
; Water Microbiology
英文摘要: Carbon and nitrogen cycles are coupled through both stoichiometric requirements for microbial biomass and dissimilatory metabolic processes in which microbes catalyse reduction-oxidation reactions. Here, we integrate stoichiometric theory and thermodynamic principles to explain the commonly observed trade-off between high nitrate and high organic carbon concentrations, and the even stronger trade-off between high nitrate and high ammonium concentrations, across a wide range of aquatic ecosystems. Our results suggest these relationships are the emergent properties of both microbial biomass stoichiometry and the availability of terminal electron acceptors. Because elements with multiple oxidation states (i.e. nitrogen, manganese, iron and sulphur) serve as both nutrients and sources of chemical energy in reduced environments, both assimilative demand and dissimilatory uses determine their concentrations across broad spatial gradients. Conceptual and quantitative models that integrate rather than independently examine thermodynamic, stoichiometric and evolutionary controls on biogeochemical cycling are essential for understanding local to global biogeochemical patterns. © 2015 John Wiley & Sons Ltd/CNRS. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107861
Appears in Collections: 气候减缓与适应
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作者单位: Department of Natural Resources and the Environment, Center for Environmental Sciences and Engineering, University of Connecticut, Storrs, CT, United States; Department of Biology, East Carolina University, Greenville, NC, United States; Department of Biology, Duke University, Durham, NC, United States
Recommended Citation:
Helton A.M.,Ardón M.,Bernhardt E.S.. Thermodynamic constraints on the utility of ecological stoichiometry for explaining global biogeochemical patterns[J]. Ecology Letters,2015-01-01,18(10)