Nitrogen Addition in a Tibetan Alpine Meadow Increases Intraspecific Variability in Nitrogen Uptake, Leading to Increased Community-level Nitrogen Uptake

doi:10.1007/s10021-021-00647-3

	Nitrogen Addition in a Tibetan Alpine Meadow Increases Intraspecific Variability in Nitrogen Uptake, Leading to Increased Community-level Nitrogen Uptake
	Li Zhang ; Ni, Ming ; Zhu, Tongbin ; Xu, Xingliang ; Zhou, Shurong 2; Shipley, Bill
刊名	ECOSYSTEMS
	2021-06-07
页码	12
关键词	Community composition shifts Intraspecific variability N addition Plant N uptake Species turnover Tibetan alpine meadow
ISSN号	1432-9840
DOI	10.1007/s10021-021-00647-3
通讯作者	Zhou, Shurong(zhshrong@hainanu.edu.cn)
英文摘要	Plant nitrogen (N) uptake is a critical ecosystem function, especially when terrestrial ecosystems are threatened worldwide by increasing anthropogenic N deposition. However, the mechanisms by which biotic factors mediate the effects of increases in N addition on community N uptake remain unknown. Here, we determine how inter- and intraspecific differences contribute to this response by decomposing N uptake in a specific community in a 7-year NH4NO3 addition experiment in a Tibetan alpine meadow using variance partitioning approach. We measured both plant N uptake from ammonium and nitrate of 25 common species in control plots and community-level uptake along a N addition gradient, using short-term in situ N-15 labeling. Plant community composition, soil properties (soil ammonium and nitrate, pH, Al3+ and base cations), soil microbial biomass carbon and nitrogen were measured and recorded. We found that N addition increased community-level N uptake by significantly increasing individual species' variability of N uptake (that is, positive intraspecific variability), although with limited effect of community composition shift. The significantly positive intraspecific variability from ammonium and nitrate along the N addition gradient was caused by increased soil available N and soil acidification with N addition. The limited effect of community composition shift means that N addition increased community-level N uptake with only limited species filtering. Our results provide a novel insight into the mechanism of how N addition affects community-level N uptake, by linking physiological, community and ecosystem function, and highlight the important role that intraspecific variability of N uptake plays.
资助项目	National Natural Science Foundation of China[31830009] ; National Natural Science Foundation of China[31770518] ; Hainan University[RZ2000009932] ; CSC (China Scholarship Council) scholarship
WOS关键词	ROOT-ZONE ACIDITY ; PLANT ; DEPOSITION ; AMMONIUM ; FOREST ; SOIL ; COMPETITION ; MECHANISMS ; DIVERSITY ; DOMINANCE
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000658628300002
资助机构	National Natural Science Foundation of China ; Hainan University ; CSC (China Scholarship Council) scholarship
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/164162]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhou, Shurong
作者单位	1.Fudan Univ, Sch Life Sci, 2005 Songhu Rd, Shanghai 200438, Peoples R China 2.Fudan Univ, Shanghai Inst Ecochongming SIEC, Coastal Ecosyst Res Stn Yangtze River Estuary, Minist Educ,Key Lab Biodivers Sci & Ecol Engn, 2005 Songhu Rd, Shanghai 200438, Peoples R China 3.Univ Sherbrooke, Dept Biol, Sherbrooke, PQ J1K 2R1, Canada 4.Anhui Agr Univ, Sch Resources & Environm, 130 Changjiang West Rd, Hefei 230036, Peoples R China 5.Chinese Acad Geol Sci, MLR & Guangxi, Karst Dynam Lab, Inst Karst Geol, Guilin 541004, Peoples R China 6.Chinese Acad Sci, Inst Geog Sci & Nat Resources, Key Lab Ecosyst Network Observat & Modeling, 11A Datun Rd, Beijing 100101, Peoples R China 7.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 8.Hainan Univ, Coll Forestry, Key Lab Genet & Germ Plasm Innovat Trop Special F, Minist Educ, Haikou 570228, Hainan, Peoples R China
推荐引用方式 GB/T 7714	Li Zhang,Ni, Ming,Zhu, Tongbin,et al. Nitrogen Addition in a Tibetan Alpine Meadow Increases Intraspecific Variability in Nitrogen Uptake, Leading to Increased Community-level Nitrogen Uptake[J]. ECOSYSTEMS,2021:12.
APA	Li Zhang,Ni, Ming,Zhu, Tongbin,Xu, Xingliang,Zhou, Shurong,&Shipley, Bill.(2021).Nitrogen Addition in a Tibetan Alpine Meadow Increases Intraspecific Variability in Nitrogen Uptake, Leading to Increased Community-level Nitrogen Uptake.ECOSYSTEMS,12.
MLA	Li Zhang,et al."Nitrogen Addition in a Tibetan Alpine Meadow Increases Intraspecific Variability in Nitrogen Uptake, Leading to Increased Community-level Nitrogen Uptake".ECOSYSTEMS (2021):12.