| DOI: | 10.2172/1238149
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| 报告号: | DOE-WHRC--07053
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| 报告题名: | Partitioning CO<sub>2</sub> fluxes with isotopologue measurements and modeling to understand mechanisms of forest carbon sequestration |
| 作者: | Davidson, Eric A.; Saleska, Scott; Savage, Kathleen; Finzi, Adrien; Moorcroft, Paul; Wehr, Richard
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| 出版年: | 2016
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| 发表日期: | 2016-02-18
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| 总页数: | 23
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| 国家: | 美国
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| 语种: | 英语
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| 英文关键词: | ForestÍž carbonÍž partitioningÍž eddy fluxesÍž belowground allocationÍž isotopes
|
| 中文主题词: | 碳
; 植被
; 同位素
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| 主题词: | CARBON
; VEGETATION
; ISOTOPES
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| 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). |
| URL: | http://www.osti.gov/scitech/servlets/purl/1238149
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/42255
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1238149.pdf（3208KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Davidson, Eric A.,Saleska, Scott,Savage, Kathleen,et al. Partitioning CO<sub>2</sub> fluxes with isotopologue measurements and modeling to understand mechanisms of forest carbon sequestration. 2016-01-01.
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