Dissolved organic carbon content and characteristics in relation to carbon dioxide partial pressure across Poyang Lake wetlands and adjacent aquatic systems in the Changjiang basin
文献类型：期刊论文
| 作者 | Wang, Huaxin2,4; Jiao, Ruyuan3; Wang, Fang2; Zhang, Lu1; Yan, Weijin2 |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2016-12-01 |
| 卷号 | 219页码:714-723 |
| ISSN号 | 0269-7491 |
| 关键词 | Dissolved organic carbon Carbon dioxide partial pressure Molecular weight Poyang Lake wetland High-performance size-exclusion chromatography |
| DOI | 10.1016/j.envpol.2016.07.012 |
| 通讯作者 | Yan, Weijin(yanwj@igsnrr.ac.cn) |
| 英文摘要 | Dissolved organic carbon (DOC) plays diverse roles in carbon biogeochemical cycles. Here, we explored the link between DOC and pCO(2) using high-performance size-exclusion chromatography (HPSEC) with UV254 detection and excitation emission matrix (EEM) fluorescence spectroscopy to determine the molecular weight distribution (MW) and the spectral characteristics of DOC, respectively. The relationship between DOC and pCO(2) was investigated in the Poyang Lake wetlands and their adjacent aquatic systems. The results indicated significant spatial variation in the DOC concentrations, MW distributions, and pCO(2). The DOC concentration was higher in the wetlands than in the rivers and lakes. pCO(2) was high in wetlands in which the dominant vegetation was Phragmites australis, whereas it was low in wetlands in which Carex tristachya was the dominant species. DOC was divided into five fractions according to MW, as follows: super-low MW (SLMW, <1 kDa); low MW (LMW, 1-2.5 kDa); intermediate MW (IMW, 2.5 3.5 kDa); high MW (HMW, 3.5-6 kDa); and super-high MW (SMW, > 40 kDa). Rivers contained high proportions of HMW and extremely low amounts of SLMW, whereas wetlands had relatively high proportions of SLMW. The proportion of SMW (SMWp) was particularly high in wetlands. We found that pCO(2) significantly positively correlated with the proportion of IMW, and significantly negatively correlated with SMWp. These data improve our understanding of the MW of bioavailable DOC and its conversion to CO2. The present results demonstrate that both the content and characteristics of DOC significantly affect pCO(2). pCO(2) and DOC must be studied further to help understanding the role of the wetland on the regional CO2 budget. (C) 2016 Elsevier Ltd. All rights reserved. |
| WOS关键词 | SIZE-EXCLUSION CHROMATOGRAPHY ; FRESH-WATER ; MOLECULAR-WEIGHT ; ESTUARINE WATERS ; MATTER ; RIVER ; CHINA ; DENITRIFICATION ; EMISSION ; BIOAVAILABILITY |
| 资助项目 | National Natural Science Foundation of China[21177126] ; National Natural Science Foundation of China[41371454] ; National Key Research and Development Program of China[2016YFA0601000] ; CAS Key Project[KJZD-EW-TZ-G10] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000390734100080 |
| 资助机构 | National Natural Science Foundation of China ; National Key Research and Development Program of China ; CAS Key Project |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/65392]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Yan, Weijin |
| 作者单位 | 1.Chinese Acad Sci, Nanjing Inst Geog & Limnol, Key Lab Lake & Environm, Nanjing 210008, Jiangsu, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100087, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Huaxin,Jiao, Ruyuan,Wang, Fang,et al. Dissolved organic carbon content and characteristics in relation to carbon dioxide partial pressure across Poyang Lake wetlands and adjacent aquatic systems in the Changjiang basin[J]. ENVIRONMENTAL POLLUTION,2016,219:714-723. |
| APA | Wang, Huaxin,Jiao, Ruyuan,Wang, Fang,Zhang, Lu,&Yan, Weijin.(2016).Dissolved organic carbon content and characteristics in relation to carbon dioxide partial pressure across Poyang Lake wetlands and adjacent aquatic systems in the Changjiang basin.ENVIRONMENTAL POLLUTION,219,714-723. |
| MLA | Wang, Huaxin,et al."Dissolved organic carbon content and characteristics in relation to carbon dioxide partial pressure across Poyang Lake wetlands and adjacent aquatic systems in the Changjiang basin".ENVIRONMENTAL POLLUTION 219(2016):714-723. |
入库方式： OAI收割
来源：地理科学与资源研究所
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