Partitioning CO<sub>2</sub> fluxes with isotopologue measurements and modeling to understand mechanisms of forest carbon sequestration

doi:10.2172/1238149

GSTDTAP > 地球科学

DOI	10.2172/1238149
报告编号	DOE-WHRC--07053
来源ID	OSTI ID: 1238149
	Partitioning CO₂ fluxes with isotopologue measurements and modeling to understand mechanisms of forest carbon sequestration
	Davidson, Eric A.; Saleska, Scott; Savage, Kathleen; Finzi, Adrien; Moorcroft, Paul; Wehr, Richard
	2016-02-18
出版年	2016
页数	23
语种	英语
国家	美国
领域	地球科学
英文摘要	1. Project Summary and Objectives This project combines automated in situ observations of the isotopologues of CO₂ with root observations, novel experimental manipulations of belowground processes, and isotope-enabled ecosystem modeling to investigate mechanisms of below- vs. aboveground carbon sequestration at the Harvard Forest Environmental Measurements Site (EMS). The proposed objectives, which have now been largely accomplished, include: A. Partitioning of net ecosystem CO₂ exchange (NEE) into photosynthesis and respiration using long-term continuous observations of the isotopic composition of NEE, and analysis of their dynamics ; B. Investigation of the influence of vegetation phenology on the timing and magnitude of carbon allocated belowground using measurements of root growth and indices of belowground autotrophic vs. heterotrophic respiration (via trenched plots and isotope measurements); C. Testing whether plant allocation of carbon belowground stimulates the microbial decomposition of soil organic matter, using in situ rhizosphere simulation experiments wherein realistic quantities of artificial isotopically-labeled exudates are released into the soil; and D. Synthesis and interpretation of the above data using the Ecosystem Demography Model 2 (ED2).
英文关键词	ForestÍž carbonÍž partitioningÍž eddy fluxesÍž belowground allocationÍž isotopes
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/7331
专题	地球科学
推荐引用方式 GB/T 7714	Davidson, Eric A.,Saleska, Scott,Savage, Kathleen,et al. Partitioning CO₂ fluxes with isotopologue measurements and modeling to understand mechanisms of forest carbon sequestration,2016.