Nonlinear responses of ecosystem carbon fluxes to nitrogen deposition in an old-growth boreal forest

doi:10.1111/ele.13906

	Nonlinear responses of ecosystem carbon fluxes to nitrogen deposition in an old-growth boreal forest
	Xing, Aijun 1; Du, Enzai 2; Shen, Haihua 1; Xu, Longchao ; de Vries, Wim 3; Zhao, Mengying 1; Liu, Xiuyuan ; Fang, Jingyun4,5
	2022
发表期刊	ECOLOGY LETTERS
ISSN	1461-023X
卷号	25 期号:1 页码:77-88
摘要	Nitrogen (N) deposition is known to increase carbon (C) sequestration in N-limited boreal forests. However, the long-term effects of N deposition on ecosystem carbon fluxes have been rarely investigated in old-growth boreal forests. Here we show that decade-long experimental N additions significantly stimulated net primary production (NPP) but the effect decreased with increasing N loads. The effect on soil heterotrophic respiration (Rh) shifted from a stimulation at low-level N additions to an inhibition at higher levels of N additions. Consequently, low-level N additions resulted in a neutral effect on net ecosystem productivity (NEP), due to a comparable stimulating effect on NPP and Rh, while NEP was increased by high-level N additions. Moreover, we found nonlinear temporal responses of NPP, Rh and NEP to low-level N additions. Our findings imply that actual N deposition in boreal forests likely exerts a minor contribution to their soil C storage.
关键词	boreal forest ecosystem carbon balance nitrogen deposition nonlinear response soil heterotrophic respiration tree growth
学科领域	Ecology
DOI	10.1111/ele.13906
收录类别	SCI
语种	英语
WOS关键词	FINE-ROOT PRODUCTION ; SOIL RESPIRATION ; GLOBAL ANALYSIS ; TREE GROWTH ; SEQUESTRATION ; LIMITATION ; TEMPERATE ; CO2 ; ENRICHMENT ; BIOMASS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000710454700001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1461-0248
资助机构	Key Research Program of Frontier Sciences, CAS [QYZDY--SSW-SMC011] ; National Key Research and Development Program [2017YFC0503901] ; Fok Ying-Tong Education Foundation [161015] ; National Natural Science Foundation of China [41877328, 41630750] ; Programs of Basic Science Centres [31988102]
作者邮箱	shen.haihua@ibcas.ac.cn ; jyfang@urban.pku.edu.cn
引用统计	被引频次：18[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/2S10CLM1/28664
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing, Peoples R China 4.Wageningen Univ & Res, Environm Res, Wageningen, Netherlands 5.Peking Univ, Inst Ecol, Coll Urban & Environm Sci, Beijing, Peoples R China 6.Peking Univ, Inst Ecol, Key Lab Earth Surface Proc, Minist Educ, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Xing, Aijun,Du, Enzai,Shen, Haihua,et al. Nonlinear responses of ecosystem carbon fluxes to nitrogen deposition in an old-growth boreal forest[J]. ECOLOGY LETTERS,2022,25(1):77-88.
APA	Xing, Aijun.,Du, Enzai.,Shen, Haihua.,Xu, Longchao.,de Vries, Wim.,...&Fang, Jingyun.(2022).Nonlinear responses of ecosystem carbon fluxes to nitrogen deposition in an old-growth boreal forest.ECOLOGY LETTERS,25(1),77-88.
MLA	Xing, Aijun,et al."Nonlinear responses of ecosystem carbon fluxes to nitrogen deposition in an old-growth boreal forest".ECOLOGY LETTERS 25.1(2022):77-88.

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