Root trait-mediated belowground competition and community composition of a temperate steppe under nitrogen enrichment

doi:10.1007/s11104-019-03989-z

	Root trait-mediated belowground competition and community composition of a temperate steppe under nitrogen enrichment
	Zheng, Zhi 1; Bai, Wenming; Zhang, Wen-Hao
	2019
发表期刊	PLANT AND SOIL
ISSN	0032-079X
卷号	437 期号:1-2 页码:341-354
摘要	AimsShifts of plant community composition with enhanced atmospheric nitrogen (N) deposition in grasslands have occurred globally. Despite extensive studies on the effects of enhanced N deposition on plant species composition of grassland community, few studies have focused on belowground ecological processes and duration of N addition.MethodsIn situ long-term (14-year: 2004-2017) and short-term (4-year: 2014-2017) N-addition experiments in the same sites were conducted in a temperate steppe of northern China. We investigated the effects of N-addition on plant community composition and root traits by comparing results of short-term and long-term N addition.ResultsNitrogen-evoked changes in plant community composition were primarily dependent on N-addition duration and functional groups. Short-term N addition favored growth of grasses, and depressed growth of forbs, while long-term N addition favored growth of sedges, and concurrently depressed growth of grasses and forbs, ultimately leading to a time-dependent shift of plant community composition from co-dominance by grasses and forbs to dominance by grasses, then to dominance by sedges. Similar to the observed aboveground biomass, short-term N addition led to an increase in the relative belowground biomass (the proportion of belowground biomass of individual plant to community belowground biomass) of the grass Stipa krylovii and a decrease in the relative belowground biomass of the forb Artemisia frigida, respectively. In contrast, long-term N addition enhanced the relative belowground biomass of the sedge Carex korshinskyi, and reduced the relative belowground biomass of the grass S. krylovii and the forb A. frigida. Moreover, traits of absorptive fine roots (first-two orders) in the three species (grass: S. krylovii; forb: A. frigida; sedge: C. korshinskyi) that are representatives of three functional groups differed in their responses to short-term and long-term N addition, thus rendering them differentially competitive for acquisition of belowground resource. The changes in root traits of the three species in responses to N addition of varying duration were associated with their relative aboveground biomass.ConclusionsRoot traits play important roles in mediating the competition for belowground resource and changes in plant community composition of temperate grasslands under N enrichment. Our findings provide novel insights into N-deposition-induced changes in steppe community composition by linking root traits of functional groups and duration of N addition.
关键词	Nitrogen deposition Community dynamics Functional groups Inner Mongolia steppe
学科领域	Agronomy ; Plant Sciences ; Soil Science
DOI	10.1007/s11104-019-03989-z
收录类别	SCI
语种	英语
WOS关键词	NUTRIENT FORAGING STRATEGIES ; BIODIVERSITY LOSS ; PLANT DIVERSITY ; DEPOSITION ; RESPONSES ; LIGHT ; PRECIPITATION ; PATTERNS ; DRIVERS ; EXPLAIN
WOS研究方向	Agriculture ; Plant Sciences
WOS记录号	WOS:000463608700023
出版者	SPRINGER
文献子类	Article
出版地	DORDRECHT
EISSN	1573-5036
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31830011, 31470466]
作者邮箱	whzhang@ibcas.ac.cn
引用统计	被引频次：22[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/2S10CLM1/19888
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.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Tibetan Med Res, Xinning 810008, Peoples R China 3.Chinese Acad Sci, Inner Mongolia Res Ctr Prataculture, Beijing 100093, Peoples R China 4.Univ Chinese Acad Sci, Coll Resource & Environm, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Beijing Inst Life Sci, Res Network Global Change Biol, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Zhi,Bai, Wenming,Zhang, Wen-Hao. Root trait-mediated belowground competition and community composition of a temperate steppe under nitrogen enrichment[J]. PLANT AND SOIL,2019,437(1-2):341-354.
APA	Zheng, Zhi,Bai, Wenming,&Zhang, Wen-Hao.(2019).Root trait-mediated belowground competition and community composition of a temperate steppe under nitrogen enrichment.PLANT AND SOIL,437(1-2),341-354.
MLA	Zheng, Zhi,et al."Root trait-mediated belowground competition and community composition of a temperate steppe under nitrogen enrichment".PLANT AND SOIL 437.1-2(2019):341-354.

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