| DOI: | 10.1002/2015GL064765
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| 论文题名: | Positive priming of terrestrially derived dissolved organic matter in a freshwater microcosm system |
| 作者: | Bianchi T.S.; Thornton D.C.O.; Yvon-Lewis S.A.; King G.M.; Eglinton T.I.; Shields M.R.; Ward N.D.; Curtis J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9573
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| EISSN: | 1944-9304
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| 出版年: | 2015
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| 卷: | 42, 期:13 | | 起始页码: | 5460
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| 结束页码: | 5467
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| 语种: | 英语
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| 英文关键词: | dissolved organic matter
; organic carbon cycling
; priming
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| Scopus关键词: | Biogeochemistry
; Biological materials
; Budget control
; Carbon dioxide
; Dissolution
; Gas emissions
; Greenhouse gases
; Organic compounds
; Stream flow
; Continental shelves
; Controlled experiment
; Dissolved organic carbon
; Dissolved organic matters
; Hydroelectric reservoirs
; Microcosm experiments
; Organic carbon cycling
; priming
; Organic carbon
; alga
; carbon cycle
; carbon dioxide
; dissolved organic matter
; fieldwork
; freshwater environment
; greenhouse gas
; microcosm
; remineralization
; algae
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| 英文摘要: | The role of priming processes in the remineralization of terrestrially derived dissolved organic carbon (TDOC) in aquatic systems has been overlooked. We provide evidence for TDOC priming using a lab-based microcosm experiment in which TDOC was primed by the addition of 13C-labeled algal dissolved organic carbon (ADOC) or a 13C-labeled disaccharide (trehalose). The rate of TDOC remineralization to carbon dioxide (CO2) occurred 4.1±0.9 and 1.5±0.3 times more rapidly with the addition of trehalose and ADOC, respectively, relative to experiments with TDOC as the sole carbon source over the course of a 301h incubation period. Results from these controlled experiments provide fundamental evidence for the occurrence of priming of TDOC by ADOC and a simple disaccharide. We suggest that priming effects on TDOC should be considered in carbon budgets for large-river deltas, estuaries, lakes, hydroelectric reservoirs, and continental shelves. Key Points Priming of organic matter exists in aquatic systems Ramifications of this work have major implications on greenhouse gas emissions First evidence for lab conditions of priming setting stage for more fieldwork. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938151613&doi=10.1002%2f2015GL064765&partnerID=40&md5=fdbd65c9ad656394ba1e1d0ec5e3f590
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9188
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Department of Geological Sciences, University of Florida, Gainesville, FL, United States
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| Recommended Citation: | |
Bianchi T.S.,Thornton D.C.O.,Yvon-Lewis S.A.,et al. Positive priming of terrestrially derived dissolved organic matter in a freshwater microcosm system[J]. Geophysical Research Letters,2015-01-01,42(13).
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