Decoupling of N and P aggravated upward along food chains in an urban river ecosystem
文献类型：期刊论文
| 作者 | An, Shenqun; Yan, Zhengbing; Song, Ying; Fu, Qiang; Ge, Feiyang; Wu, Zehao; An, Wei ; Han, Wenxuan
|
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2023 |
| 卷号 | 313页码:137555-1-8 |
| ISSN号 | 0045-6535 |
| 关键词 | Nitrogen and phosphorus stoichiometry Trophic level Nutrient decoupling Stoichiometric homeostasis Nutrient imbalance |
| 英文摘要 | Anthropogenic input of nutrient has profoundly influenced water quality and aquatic organisms, however, large and unbalanced nitrogen (N) and phosphorus (P) inputs (decoupling) can lead to a range of ecological health problems such as eutrophication. Whether and how the decoupling varies along the aquatic food chain remains poorly addressed. Here we chose an urban river ecosystem in the cosmopolis region of Beijing, with reclaimed water as the entire replenishment water source over 20 years, to demonstrate the decoupling pattern of N vs P across trophic levels. Results showed that organism C, N and P concentration increased, but N:P ratio decreased upward along the food chains, suggesting that this decoupling of N and P increased as trophic level ascends. Compared with natural freshwater ecosystem, the decoupling of N and P was aggravated in the reclaimed water river. Moreover, the homeostasis of N and P were higher at higher relative to lower trophic levels, and higher in macro-food chain relative to planktonic food chain. This study, for the first time, revealed the increasing decoupling of N vs P upward along the major food chains in an urban aquatic ecosystem, and could improve the understanding of nutrient cycling at the food chain level under human disturbance, and provide useful information for ecological restoration and eutrophication control of urban wetlands replenished with reclaimed water. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/48562]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 作者单位 | 1.Research Center for Eco-Environmental Sciences (RCEES) 2.Institute of Botany, CAS 3.Chinese Academy of Sciences 4.China Agricultural University |
| 推荐引用方式 GB/T 7714 | An, Shenqun,Yan, Zhengbing,Song, Ying,et al. Decoupling of N and P aggravated upward along food chains in an urban river ecosystem[J]. CHEMOSPHERE,2023,313:137555-1-8. |
| APA | An, Shenqun.,Yan, Zhengbing.,Song, Ying.,Fu, Qiang.,Ge, Feiyang.,...&Han, Wenxuan.(2023).Decoupling of N and P aggravated upward along food chains in an urban river ecosystem.CHEMOSPHERE,313,137555-1-8. |
| MLA | An, Shenqun,et al."Decoupling of N and P aggravated upward along food chains in an urban river ecosystem".CHEMOSPHERE 313(2023):137555-1-8. |
入库方式： OAI收割
来源：生态环境研究中心
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