| DOI: | 10.2172/1169520
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| 报告号: | DOE-MSSTATE-SC6879
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| 报告题名: | Exploratory Research - Using Volatile Organic Compounds to Separate Heterotrophic and Autotrophic Forest Soil Respiration |
| 作者: | Roberts, Scott D; Hatten, Jeffrey A
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| 出版年: | 2015
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| 发表日期: | 2015-02-09
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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: | Volatile organic compounds
; soil organic matter, soil carbon
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| 中文主题词: | 土壤
; 碳
; 土壤呼吸
; 挥发性有机化合物
; 土壤含水量
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| 主题词: | SOILS
; CARBON
; SOIL RESPIRATION
; VOLATILE ORGANIC COMPOUNDS
; SOIL MOISTURE
|
| 英文摘要: | The initial focus of this project was to develop a method to partition soil respiration into its components (autotrophic, heterotrophic etc.) using the fingerprint of volatile organic compounds (VOCs) from soils. We were able to identify 63 different VOCs in our study; however, due to technical difficulties we were unable to take reliable measurements in order to test our hypotheses and develop this method. In the end, we changed the objectives of the project. Our new objectives were to characterize the effects of species and soil moisture regime on the composition of soil organic matter. We utilized the soils from the greenhouse experiment we had established for the soil VOC study and determined the lignin biomarker profiles of each of the treatments. We found that moisture had a significant effect on the carbon content of the soils with the low moisture treatments having higher carbon content than the high moisture treatments. We found that the relative yield of syringyl phenols (SP), ligin (Lig), and substituted fatty acids (SFA) were elevated in deciduous planted pots and reduced in conifer planted pots relative to plant-free treatments. Our results suggest nuttall oak preserved lignin and SFA, while loblolly pine lost lignin and SFA similarly to the plant free treatments. Since we did not find that the carbon concentrations of the soils were different between the species, nuttall oak probably replaced more native soil carbon than loblolly pine. This suggests that relative to loblolly pine, nuttall oak is a priming species. Since priming may impact soil carbon pools more than temperature or moisture, determining which species are priming species may facilitate an understanding of the interaction that land use and climate change may have on soil carbon pools. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1169520
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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/41960
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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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| Recommended Citation: | |
Roberts, Scott D,Hatten, Jeffrey A. Exploratory Research - Using Volatile Organic Compounds to Separate Heterotrophic and Autotrophic Forest Soil Respiration. 2015-01-01.
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