DOI: 10.1002/2014MS000358
Scopus记录号: 2-s2.0-84928789001
论文题名: Sensitivity of decomposition rates of soil organic matter with respect to simultaneous changes in temperature and moisture
作者: Sierra C ; A ; , Trumbore S ; E ; , Davidson E ; A ; , Vicca S ; , Janssens I
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 7, 期: 1 起始页码: 335
结束页码: 356
语种: 英语
英文关键词: Biogeochemistry
; Biological materials
; Carbon
; Climate change
; Ecology
; Ecosystems
; Enzyme activity
; Functions
; Moisture
; Organic carbon
; Organic compounds
; Oxygen supply
; Soil moisture
; Soils
; Water content
; Climate feedbacks
; Global environmental change
; Heterotrophic respiration
; Laboratory experiments
; Mathematical functions
; Soil organic carbon
; Soil temperature
; Terrestrial ecosystems
; Temperature
; carbon cycle
; concentration (composition)
; data set
; decomposition
; environmental change
; microbial activity
; moisture content
; numerical model
; oxygen
; sensitivity analysis
; soil organic matter
; soil temperature
; temperature effect
; terrestrial ecosystem
; theoretical study
英文摘要: The sensitivity of soil organic matter decomposition to global environmental change is a topic of prominent relevance for the global carbon cycle. Decomposition depends on multiple factors that are being altered simultaneously as a result of global environmental change; therefore, it is important to study the sensitivity of the rates of soil organic matter decomposition with respect to multiple and interacting drivers. In this manuscript, we present an analysis of the potential response of decomposition rates to simultaneous changes in temperature and moisture. To address this problem, we first present a theoretical framework to study the sensitivity of soil organic matter decomposition when multiple driving factors change simultaneously. We then apply this framework to models and data at different levels of abstraction: (1) to a mechanistic model that addresses the limitation of enzyme activity by simultaneous effects of temperature and soil water content, the latter controlling substrate supply and oxygen concentration for microbial activity; (2) to different mathematical functions used to represent temperature and moisture effects on decomposition in biogeochemical models. To contrast model predictions at these two levels of organization, we compiled different data sets of observed responses in field and laboratory studies. Then we applied our conceptual framework to: (3) observations of heterotrophic respiration at the ecosystem level; (4) laboratory experiments looking at the response of heterotrophic respiration to independent changes in moisture and temperature; and (5) ecosystem-level experiments manipulating soil temperature and water content simultaneously. © 2015. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76036
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Max Planck Institute for Biogeochemistry, Jena, Germany; Woods Hole Research Center, Falmouth, MA, United States; Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium
Recommended Citation:
Sierra C,A,, Trumbore S,et al. Sensitivity of decomposition rates of soil organic matter with respect to simultaneous changes in temperature and moisture[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,7(1)