DOI: 10.1002/2014GL059428
论文题名: Tracing the long-term microbial production of recalcitrant fluorescent dissolved organic matter in seawater
作者: Jørgensen L. ; Stedmon C.A. ; Granskog M.A. ; Middelboe M.
刊名: Geophysical Research Letters
ISSN: 0094-10172
EISSN: 1944-9903
出版年: 2014
卷: 41, 期: 7 起始页码: 2481
结束页码: 2488
语种: 英语
英文关键词: bioavailability
; dissolved organic matter
; DOC
; fluorescence
; microbial respiration
; recalcitrant DOM
Scopus关键词: Biochemistry
; Biodegradation
; Biological materials
; Carbon
; Fluorescence
; bioavailability
; Dissolved organic matters
; DOC
; Microbial respiration
; recalcitrant DOM
; Substrates
; bioavailability
; dissolved organic matter
; fluorescence
; long-term change
; microbial activity
; prokaryote
; respiration
; seawater
; Prokaryota
英文摘要: The majority of dissolved organic matter (DOM) in the ocean is resistant to microbial degradation, yet its formation remains poorly understood the fluorescent fraction of DOM can be used to trace the formation of recalcitrant DOM (RDOM). A long-term (> 1-year) experiment revealed 27-52% removal of dissolved organic carbon and a nonlinear increase in RDOM fluorescence associated with microbial turnover of semilabile DOM. This fluorescence was also produced using glucose as the only initial carbon source, suggesting that degradation of prokaryote remnants contributes to RDOM. Our results indicate that the formation of a fluorescent RDOM component depends on the bioavailability of the substrate: the less labile, the larger the production of fluorescent RDOM relative to organic carbon remineralized the anticipated increase in microbial carbon demand due to ocean warming can potentially force microbes to degrade less labile substrates, thereby increasing RDOM production and stimulating ocean carbon storage. Key Points Optical properties of DOM can be used to trace production of recalcitrant DOM Production of recalcitrant DOM is associated with microbial activity Less labile DOM shifts microbial activity towards production of recalcitrant DOM © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84897954756&doi=10.1002%2f2014GL059428&partnerID=40&md5=0d82d257461a46eb5f308016b7535764
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7436
Appears in Collections: 气候减缓与适应
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作者单位: Marine Biological Section, University of Copenhagen, Helsingør, Denmark
Recommended Citation:
Jørgensen L.,Stedmon C.A.,Granskog M.A.,et al. Tracing the long-term microbial production of recalcitrant fluorescent dissolved organic matter in seawater[J]. Geophysical Research Letters,2014-01-01,41(7).