Effect of long-term phosphorus addition on the quantity and quality of dissolved organic carbon in a freshwater wetland of Northeast China | |
Mao, Rong1,2; Li, Si-Yue2![]() | |
刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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2017-05-15 | |
卷号 | 586页码:1032-1037 |
关键词 | Chemical Composition Eutrophication Fertilization Global Change Optical Properties Temperate Wetland |
ISSN号 | 0048-9697 |
DOI | 10.1016/j.scitotenv.2017.02.084 |
英文摘要 | Understanding how P enrichment alters the quantity and quality of dissolved organic carbon (DOC) is important, because of their role in regulating the C cycle. Here, we established a four-level P addition experiment (0, 1.2,4.8, and 9.6 g Pm-2 year(-1)) in a N-limited freshwater wetland in the Sanjiang Plain, Northeast China. The aim of this study was to examine the effects of eight years of P addition on DOC concentration, SUVA(254) (Abs(254)/DOC concentration, indicating the aromaticity of DOC), C:C ratio (Abs(400)/DOC concentration, indicating the proportion of colored humic substances in DOC), and E4:E6 ratio (Abs(465)/Abs(665), indicating the molecular size of humic substances) in surface water and soil pore water (0-15 cm depth) during the growing season (June through September). Our results showed similar changing trends in concentration and optical properties of DOC following eight years of P addition in the both surface water and soil pore water across the sampling dates. Generally, P addition decreased DOC concentration, SUVA254, and C:C ratio, and increased E4:E6 ratio, irrespective of P addition levels. These altered optical properties of DOC indicated that P addition decreased the molecular weight and aromaticity of DOC, and thus increased the quality of DOC. These results suggest P enrichment substantially reduces the quantity of DOC in N-limited temperate freshwater wetlands, and imply that increased DOC quality following P addition can further provide a positive feedback to decreased DOC pool. (C) 2017 Elsevier B.V. All rights reserved. |
资助项目 | National Natural Science Foundation of China[31570479] ; National Natural Science Foundation of China[41125001] ; National Natural Science Foundation of China[41471056] ; Youth Innovation Promotion Association of CAS[2013152] ; Hundred Talent Program of the Chinese Academy of Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000398758800098 |
内容类型 | 期刊论文 |
源URL | [http://172.16.51.4:88/handle/2HOD01W0/227] ![]() |
专题 | 生态过程与重建研究中心 |
作者单位 | 1.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Wetland Ecol & Environm, Changchun 130102, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China |
推荐引用方式 GB/T 7714 | Mao, Rong,Li, Si-Yue,Zhang, Xin-Hou,et al. Effect of long-term phosphorus addition on the quantity and quality of dissolved organic carbon in a freshwater wetland of Northeast China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,586:1032-1037. |
APA | Mao, Rong,Li, Si-Yue,Zhang, Xin-Hou,Wang, Xian-Wei,&Song, Chang-Chun.(2017).Effect of long-term phosphorus addition on the quantity and quality of dissolved organic carbon in a freshwater wetland of Northeast China.SCIENCE OF THE TOTAL ENVIRONMENT,586,1032-1037. |
MLA | Mao, Rong,et al."Effect of long-term phosphorus addition on the quantity and quality of dissolved organic carbon in a freshwater wetland of Northeast China".SCIENCE OF THE TOTAL ENVIRONMENT 586(2017):1032-1037. |
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