气候变化领域集成服务门户(CCPortal): Thermodynamic constraints on the utility of ecological stoichiometry for explaining global biogeochemical patterns

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DOI	10.1111/ele.12487
	Thermodynamic constraints on the utility of ecological stoichiometry for explaining global biogeochemical patterns
	Helton A.M.; Ardón M.; Bernhardt E.S.
发表日期	2015
ISSN	1461-023X
EISSN	1461-0248
卷号	18 期号:10
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.
英文关键词	Carbon; Dissimilatory microbial metabolism; Nitrate; Nitrogen; Organismal stoichiometry; Reduction-oxidation reactions
学科领域	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
语种	英语
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
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118636
作者单位	Department of Natural Resources and the Environment, Center for Environmental Sciences and Engineering, University of Connecticut, Storrs, CT 06269, United States; Department of Biology, East Carolina University, Greenville, NC 27858, United States; Department of Biology, Duke University, Durham, NC 27708, United States
推荐引用方式 GB/T 7714	Helton A.M.,Ardón M.,Bernhardt E.S.. Thermodynamic constraints on the utility of ecological stoichiometry for explaining global biogeochemical patterns[J],2015,18(10).
APA	Helton A.M.,Ardón M.,&Bernhardt E.S..(2015).Thermodynamic constraints on the utility of ecological stoichiometry for explaining global biogeochemical patterns.Ecology Letters,18(10).
MLA	Helton A.M.,et al."Thermodynamic constraints on the utility of ecological stoichiometry for explaining global biogeochemical patterns".Ecology Letters 18.10(2015).