Convergent nitrogen uptake patterns and divergent nitrogen acquisition strategies of coexisting plant species in response to long-term nitrogen enrichment in a temperate grassland

doi:10.1016/j.envexpbot.2021.104412

	Convergent nitrogen uptake patterns and divergent nitrogen acquisition strategies of coexisting plant species in response to long-term nitrogen enrichment in a temperate grassland
	Cao, Jirong ; Yang, Liuyi 1; Pang, Shuang 1; Yang, Junjie ; Hu, Yecui 2; Li, Yuncong 3; Li, Linghao; Wang, Qibing
	2021
发表期刊	ENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN	0098-8472
卷号	185
摘要	Nitrogen (N) deposition can significantly alter plant diversity and soil N status and cycling. However, there is rare information about the responses of plant N uptake of coexisting species to N deposition, which could facilitate the understanding of these N-induced ecosystem changes, particularly when taking N addition frequency into consideration. We assessed the uptake rates of N of various chemical forms (both inorganic and organic N) among coexisting plant species in response to N enrichment, using in situ stable isotope labeling techniques (N-15-labeled ammonium, N-15-labeled nitrate and C-13-N-15-labeled glycine), through a long-term N deposition experiment with monthly and biannual N addition frequencies in a temperate grassland. The plants of all three targeted species took up much greater inorganic N than amino acid N (93.4-99.4 % vs. 0.6-6.6 % in relative contributions to the total N uptake). The most abundant soil N form that originally was NH4+, was shifted to be NO3- under low and moderate N additions and back to be NH4+ at high addition level. Plants of not only dominant but also minor species predominantly took up N from the most abundant soil N form along N addition gradient. The dominant species Leymus chinensis, which continued to maintain its dominance under N enrichment, exhibited the ability to capture N of all different forms to tolerate and survive in a wide range of soil N environments. In contrast, another dominant species Stipa grandis, which was losing its dominance with N addition, showed the acquisition capacity of single N form in response to increased N inputs. It should be noted that there were interaction effects of N addition frequency and level on plant N uptake rates. Plant N uptake patterns and acquisition strategies could have important consequences for changes in ecosystem biodiversity and function under current and future N deposition scenarios.
关键词	N-15 tracer Nitrogen uptake Nitrogen addition frequency Nitrogen form Nitrate Ammonium Free amino acid Semiarid grasslands
学科领域	Plant Sciences ; Environmental Sciences
DOI	10.1016/j.envexpbot.2021.104412
收录类别	SCI
语种	英语
WOS关键词	AMINO-ACIDS ; NICHE COMPLEMENTARITY ; ECOSYSTEM RESPONSES ; INORGANIC NITROGEN ; SOIL MICROBES ; DEPOSITION ; PLASTICITY ; DIVERSITY ; PREFERENCES ; COMPETITION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000642458900006
出版者	PERGAMON-ELSEVIER SCIENCE LTD
文献子类	Article
出版地	OXFORD
EISSN	1873-7307
资助机构	National Key RD Program [2016YFC0500702] ; National Natural Science Foundation of China [41977046, 31470006] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA23080402]
作者邮箱	qwang@ibcas.ac.cn
引用统计	被引频次：15[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/2S10CLM1/26759
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 100049, Peoples R China 3.China Univ Geosci, Sch Land Sci & Technol, Beijing 100083, Peoples R China 4.Univ Florida, Trop Res & Educ Ctr, Soil & Water Sci Dept, Homestead, FL 33031 USA
推荐引用方式 GB/T 7714	Cao, Jirong,Yang, Liuyi,Pang, Shuang,et al. Convergent nitrogen uptake patterns and divergent nitrogen acquisition strategies of coexisting plant species in response to long-term nitrogen enrichment in a temperate grassland[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2021,185.
APA	Cao, Jirong.,Yang, Liuyi.,Pang, Shuang.,Yang, Junjie.,Hu, Yecui.,...&Wang, Qibing.(2021).Convergent nitrogen uptake patterns and divergent nitrogen acquisition strategies of coexisting plant species in response to long-term nitrogen enrichment in a temperate grassland.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,185.
MLA	Cao, Jirong,et al."Convergent nitrogen uptake patterns and divergent nitrogen acquisition strategies of coexisting plant species in response to long-term nitrogen enrichment in a temperate grassland".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 185(2021).

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