Temporal controls on dissolved organic carbon biodegradation in subtropical rivers: Initial chemical composition versus stoichiometry
文献类型：期刊论文
| 作者 | Mao, Rong1,2; Li, Siyue1
|
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2019-02-15 |
| 卷号 | 651页码:3064-3069 |
| 关键词 | Biodegradability Carbon dioxide production Nutrient availability Riverine C cycle The Three Gorges Reservoir area |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2018.10.220 |
| 通讯作者 | Li, Siyue(syli2006@163.com) |
| 英文摘要 | Dissolved organic carbon (DOC) plays an indispensable role in biogeochemical cycles and ecosystem services in rivers. However, little is known about the seasonal variations of DOC biodegradation in subtropical rivers. Here, we investigated the concentrations of DOC, dissolved total nitrogen ( DIN), and dissolved total phosphorus (DTP), humikation index (HIX), fluorescence index (FI), and DOC biodegradation in 57 rivers in the dry and wet seasons in the Three Gorges Reservoir area, China, and the aims were to clarify the temporal changes in DOC biodegradation and its driving factors in these subtropical rivers. Compared with dry season, DIN and DTP concentrations, and HIX value were greater, and Fl value was lower in the wet season. However, DOC biodegradation remained unchanged across the two sampling seasons. Further, DOC biodegradation negatively correlated with DOC:DTP ratio, DTN:DTP ratio, and Fl in the dry season, but only with HIX in the wet season. These findings emphasis that, despite unchanged DOC biodegradation, the key factors driving DOC biodegradation shift from C:N:P stoichiometry in the dry season to initial chemical composition in the wet season in subtropical rivers. Our results regarding the temporal patterns of DOC biodegradation and the underlying mechanisms bear important implications for a better understanding of C dynamics in subtropical river ecosystems. (C) 2018 Elsevier B.V. All rights reserved. |
| 资助项目 | Hundred Talent Program of the Chinese Academy of Sciences[R53A362Z10] ; National Natural Science Foundation of China[31670473] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000450551600131 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/7060]  |
| 专题 | 生态水文研究中心 |
| 通讯作者 | Li, Siyue |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecohydrol, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 2.Jiangxi Agr Univ, Key Lab Silviculture, Coinnovat Ctr Jiangxi Typ Trees Cultivat & Utiliz, Coll Forestry, Nanchang 330045, Jiangxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mao, Rong,Li, Siyue. Temporal controls on dissolved organic carbon biodegradation in subtropical rivers: Initial chemical composition versus stoichiometry[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,651:3064-3069. |
| APA | Mao, Rong,&Li, Siyue.(2019).Temporal controls on dissolved organic carbon biodegradation in subtropical rivers: Initial chemical composition versus stoichiometry.SCIENCE OF THE TOTAL ENVIRONMENT,651,3064-3069. |
| MLA | Mao, Rong,et al."Temporal controls on dissolved organic carbon biodegradation in subtropical rivers: Initial chemical composition versus stoichiometry".SCIENCE OF THE TOTAL ENVIRONMENT 651(2019):3064-3069. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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