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

doi:10.1111/ele.13906

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	Nonlinear responses of ecosystem carbon fluxes to nitrogen deposition in an old-growth boreal forest
	Xing, Aijun 4; Du, Enzai 3; Shen, Haihua 4; Xu, Longchao ; de Vries, Wim 2; Zhao, Mengying 4; Liu, Xiuyuan ; Fang, Jingyun 5,6
刊名	ECOLOGY LETTERS
	2022
卷号	25 期号:1 页码:77-88
关键词	boreal forest ecosystem carbon balance nitrogen deposition nonlinear response soil heterotrophic respiration tree growth
ISSN号	1461-023X
DOI	10.1111/ele.13906
文献子类	Article
英文摘要	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.
学科主题	Ecology
电子版国际标准刊号	1461-0248
出版地	HOBOKEN
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)
语种	英语
出版者	WILEY
WOS记录号	WOS:000710454700001
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]
内容类型	期刊论文
源URL	[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.Peking Univ, Inst Ecol, Key Lab Earth Surface Proc, Minist Educ, Beijing, Peoples R China 2.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 5.Peking Univ, Inst Ecol, Coll Urban & Environm Sci, Beijing, Peoples R China 6.Wageningen Univ & Res, Environm Res, Wageningen, Netherlands
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.