DOI: 10.1038/NGEO2440
论文题名: Persistence of dissolved organic matter in lakes related to its molecular characteristics
作者: Kellerman A.M. ; Kothawala D.N. ; Dittmar T. ; Tranvik L.J.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期: 6 起始页码: 454
结束页码: 457
语种: 英语
Scopus关键词: biodegradation
; complexity
; decomposition
; dissolved organic matter
; environmental conditions
; lacustrine environment
; nitrogen
; optical property
; persistence
; pollutant removal
; temporal analysis
; Sweden
英文摘要: Whether intrinsic molecular properties or extrinsic factors such as environmental conditions control the decomposition of natural organic matter across soil, marine and freshwater systems has been subject to debate 3. Comprehensive evaluations of the controls that molecular structure exerts on organic matter's persistence in the environment have been precluded by organic matter's extreme complexity4. Here we examine dissolved organic matter from 109 Swedish lakes using ultrahigh-resolution mass spectrometry and optical spectroscopy to investigate the constraints on its persistence in the environment. We find that degradation processes preferentially remove oxidized, aromatic compounds, whereas reduced, aliphatic and N-containing compounds are either resistant to degradation or tightly cycled and thus persist in aquatic systems. The patterns we observe for individual molecules are consistent with our measurements of emergent bulk characteristics of organic matter at wide geographic and temporal scales, as reflected by optical properties. We conclude that intrinsic molecular properties are an important control of overall organic matter reactivity. © 2015 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106175
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Limnology/Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, Uppsala, Sweden; Research Group for Marine Geochemistry, ICBM-MPI Bridging Group, University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany; Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, PO Box 7050, Uppsala, Sweden
Recommended Citation:
Kellerman A.M.,Kothawala D.N.,Dittmar T.,et al. Persistence of dissolved organic matter in lakes related to its molecular characteristics[J]. Nature Geoscience,2015-01-01,8(6)