Decoupling of N and P aggravated upward along food chains in an urban river ecosystem

doi:10.1016/j.chemosphere.2022.137555

	Decoupling of N and P aggravated upward along food chains in an urban river ecosystem
	An, Shenqun ; Yan, Zhengbing 1; Song, Ying 2; Fu, Qiang 2; Ge, Feiyang ; Wu, Zehao ; An, Wei 3; Han, Wenxuan 4
	2023
发表期刊	CHEMOSPHERE
ISSN	0045-6535
卷号	313
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.
关键词	Nitrogen and phosphorus stoichiometry Trophic level Nutrient decoupling Stoichiometric homeostasis Nutrient imbalance
学科领域	Environmental Sciences
DOI	10.1016/j.chemosphere.2022.137555
收录类别	SCI
语种	英语
WOS关键词	WASTE-WATER ; FRESH-WATER ; STOICHIOMETRIC HOMEOSTASIS ; PHOSPHORUS STOICHIOMETRY ; ECOLOGICAL STOICHIOMETRY ; COMMUNITY COMPOSITION ; NUTRIENT LIMITATION ; NITROGEN ; GROWTH ; PHYTOPLANKTON
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000904126400001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
文献子类	Article
出版地	OXFORD
EISSN	1879-1298
资助机构	National Key Research and Development Program of China [2018YFC0507200]
作者邮箱	hanwenxuan@cau.edu.cn
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/29133
专题	植被与环境变化国家重点实验室
作者单位	1.China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Beijing Drainage Grp Co Ltd, Beijing 100124, Peoples R China 4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 5.China Agr Univ, Coll Resources & Environm Sci, 2 West Yuanmingyuan Rd, Beijing 100193, Peoples R China
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.
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.
MLA	An, Shenqun,et al."Decoupling of N and P aggravated upward along food chains in an urban river ecosystem".CHEMOSPHERE 313(2023).

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