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Long-term phosphorus addition enhances the biodegradability of dissolved organic carbon in a nitrogen-limited temperate freshwater wetland
文献类型：期刊论文
| 作者 | R. Mao, X. H. Zhang, S. Y. Li and C. C. Song |
| 刊名 | Science of the Total Environment
 |
| 出版日期 | 2017 |
| 卷号 | 605页码:332-336 |
| 通讯作者 | 毛瑢 |
| 中文摘要 | Phosphorus (P) enrichment is expected to strongly influence dissolved organic carbon (DOC) biodegradation. However, the relationship between P availability and DOC biodegradation is largely unknown in nitrogen (N)limited ecosystems. Here, we investigated the changes in the ratio of DOC to dissolved total nitrogen (DTN), specific UV absorbance at 254 nm(SUVA(254)), and DOC biodegradation in surface water and soil pore water (0-15 cm depth) following eight years of multi-level P addition (0, 1.2, 4.8, and 9.6 g Pm-2 year(-1)) in an N-limited freshwater marsh in Northeast China. We found that P addition caused an increase in DOC biodegradation in surface water and soil pore water, irrespective of the P addition levels. Compared with the control treatment, the P addition rates of 1.2, 4.8, and 9.6 g Pm-2 year(-1) increasedDOC biodegradation by 20.7%, 15.2%, and 14.5% in surface waters, and 11.3%, 9.4%, and 12.0% in soil pore waters, respectively. The DOC biodegradationwas separately negatively correlated with the DOC: DTN ratio and SUVA(254), indicating that the positive effect of P addition on DOC biodegradation was caused by the elevated N concentration and the reduced DOC aromaticity. Our findings suggest that P enrichment enhances the biodegradability of DOC through increased N availability and altered DOC chemical composition, which would accelerate DOC loss from the waters and alter ecosystem C balance in N-limited temperate wetlands. (C) 2017 Elsevier B.V. All rights reserved. |
| WOS记录号 | WOS:000408275500036 |
| 源URL | [http://ir.iga.ac.cn/handle/131322/7559]  |
| 专题 | 东北地理与农业生态研究所_湿地与全球变化学科组 |
| 推荐引用方式 GB/T 7714 | R. Mao, X. H. Zhang, S. Y. Li and C. C. Song. Long-term phosphorus addition enhances the biodegradability of dissolved organic carbon in a nitrogen-limited temperate freshwater wetland[J]. Science of the Total Environment,2017,605:332-336. |
| APA | R. Mao, X. H. Zhang, S. Y. Li and C. C. Song.(2017).Long-term phosphorus addition enhances the biodegradability of dissolved organic carbon in a nitrogen-limited temperate freshwater wetland.Science of the Total Environment,605,332-336. |
| MLA | R. Mao, X. H. Zhang, S. Y. Li and C. C. Song."Long-term phosphorus addition enhances the biodegradability of dissolved organic carbon in a nitrogen-limited temperate freshwater wetland".Science of the Total Environment 605(2017):332-336. |
入库方式： OAI收割
来源：东北地理与农业生态研究所
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