干旱区生态环境知识资源中心(Arid): Carbon-water Cycling in the Critical Zone: Understanding Ecosystem Process Variability Across Complex Terrain

Arid

DOI	10.2172/1257514
报告编号	DOE-Colorado--06968
来源ID	OSTI_ID: 1257514
	Carbon-water Cycling in the Critical Zone: Understanding Ecosystem Process Variability Across Complex Terrain
	Barnard, Holly [Univ. of Colorado, Boulder, CO (United States)]; Brooks, Paul [Univ. of Utah, Salt Lake City, UT (United States); Univ. of Arizona, Tucson, AZ (United States)]
英文摘要	One of the largest knowledge gaps in environmental science is the ability to understand and predict how ecosystems will respond to future climate variability. The links between vegetation, hydrology, and climate that control carbon sequestration in plant biomass and soils remain poorly understood. Soil respiration is the second largest carbon flux of terrestrial ecosystems, yet there is no consensus on how respiration will change as water availability and temperature co-vary. To address this knowledge gap, we use the variation in soil development and topography across an elevation and climate gradient on the Front Range of Colorado to conduct a natural experiment that enables us to examine the co-evolution of soil carbon, vegetation, hydrology, and climate in an accessible field laboratory. The goal of this project is to further our ability to combine plant water availability, carbon flux and storage, and topographically driven hydrometrics into a watershed scale predictive model of carbon balance. We hypothesize: (i) landscape structure and hydrology are important controls on soil respiration as a result of spatial variability in both physical and biological drivers: (ii) variation in rates of soil respiration during the growing season is due to corresponding shifts in belowground carbon inputs from vegetation; and (iii) aboveground carbon storage (biomass) and species composition are directly correlated with soil moisture and therefore, can be directly related to subsurface drainage patterns.
出版年	2016
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	54 ENVIRONMENTAL SCIENCES ; 58 GEOSCIENCES ; 59 BASIC BIOLOGICAL SCIENCES
URL	http://www.osti.gov/scitech/servlets/purl/1257514
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/271323
推荐引用方式 GB/T 7714	Barnard, Holly [Univ. of Colorado, Boulder, CO ,Brooks, Paul [Univ. of Utah, Salt Lake City, UT ,Univ. of Arizona, Tucson, AZ . Carbon-water Cycling in the Critical Zone: Understanding Ecosystem Process Variability Across Complex Terrain,2016.