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| Selective Leaching of Dissolved Organic Matter From Alpine Permafrost Soils on the Qinghai-Tibetan Plateau | |
Wang, Yinghui1; Xu, Yunping; Spencer, Robert G. M.; Zito, Phoebe4; Kellerman, Anne2,3; Podgorski, David4; Xiao, Wenjie1; Wei, Dandan; Rashid, Harunur; Yang, Yuanhe5
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| 2018 | |
| 发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
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| ISSN | 2169-8953 |
| 卷号 | 123期号:3页码:1005-1016 |
| 摘要 | Ongoing global temperature rise has caused significant thaw and degradation of permafrost soils on the Qinghai-Tibetan Plateau (QTP). Leaching of organic matter from permafrost soils to aquatic systems is highly complex and difficult to reproduce in a laboratory setting. We collected samples from natural seeps of active and permafrost layers in an alpine swamp meadow on the QTP to shed light on the composition of mobilized dissolved organic matter (DOM) by combining optical measurements, ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry, radiocarbon (C-14), and solid-state C-13 nuclear magnetic resonance spectroscopy. Our results show that even though the active layer soils contain large amounts of proteins and carbohydrates, there is a selective release of aromatic components, whereas in the deep permafrost layer, carbohydrate and protein components are preferentially leached during the thawing process. Given these different chemical characteristics of mobilized DOM, we hypothesize that photomineralization contributes significantly to the loss of DOM that is leached from the seasonally thawed surface layer. However, with continued warming, biodegradation will become more important since biolabile materials such as protein and carbohydrate are preferentially released from deep-layer permafrost soils. This transition in DOM leachate source and associated chemical composition has ramifications for downstream fluvial networks on the QTP particularly in terms of processing of carbon and associated fluxes. |
| 关键词 | permafrost dissolved organic matter FT-ICR MS C-13 NMR Qinghai-Tibetan Plateau global warming |
| 学科领域 | Environmental Sciences ; Geosciences, Multidisciplinary |
| DOI | 10.1002/2017JG004343 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS关键词 | CLIMATE-CHANGE ; CHEMICAL-COMPOSITION ; MOLECULAR-WEIGHT ; CARBON RELEASE ; ACTIVE LAYER ; THAW ; SPECTROSCOPY ; ECOSYSTEMS ; MASS ; BIODEGRADABILITY |
| WOS记录号 | WOS:000430181200018 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 文献子类 | Article |
| 出版地 | WASHINGTON |
| EISSN | 2169-8961 |
| 资助机构 | NSFNational Science Foundation (NSF) [DMR-1157490] ; National Basic Research Program of ChinaNational Basic Research Program of China [2014CB954001] ; China Scholarship CouncilChina Scholarship Council |
| 作者邮箱 | ypxu@shou.edu.cn |
| 作品OA属性 | Bronze |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/20737 |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Shanghai Ocean Univ, Coll Marine Sci, Shanghai Engn Res Ctr Hadal Sci & Technol, Shanghai, Peoples R China 2.Peking Univ, Coll Urban & Environm Sci, Key Lab Earth Surface Proc, Minist Educ, Beijing, Peoples R China 3.Florida State Univ, Natl High Magnet Field Lab, Geochem Grp, Tallahassee, FL 32306 USA 4.Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA 5.Univ New Orleans, Dept Chem, Pontchartrain Inst Environm Sci, New Orleans, LA 70148 USA 6.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yinghui,Xu, Yunping,Spencer, Robert G. M.,et al. Selective Leaching of Dissolved Organic Matter From Alpine Permafrost Soils on the Qinghai-Tibetan Plateau[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2018,123(3):1005-1016. |
| APA | Wang, Yinghui.,Xu, Yunping.,Spencer, Robert G. M..,Zito, Phoebe.,Kellerman, Anne.,...&Yang, Yuanhe.(2018).Selective Leaching of Dissolved Organic Matter From Alpine Permafrost Soils on the Qinghai-Tibetan Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,123(3),1005-1016. |
| MLA | Wang, Yinghui,et al."Selective Leaching of Dissolved Organic Matter From Alpine Permafrost Soils on the Qinghai-Tibetan Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 123.3(2018):1005-1016. |
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