Precipitation variations, rather than N deposition, determine plant ecophysiological traits in a desert steppe in Northern China

doi:10.1016/j.ecolind.2022.109144

CORC > 植物研究所 > 中国科学院植物研究所 > 植被与环境变化国家重点实验室

	Precipitation variations, rather than N deposition, determine plant ecophysiological traits in a desert steppe in Northern China
	Ma, Quanhui 1; Li, Yibo 6; Zhu, Yu 5; Liu, Xiaodi 1,4; Yu, Hongying 1,3,4; Li, Lang 1,4; Qi, Miao 1,4; Sun, Hongru 1,4; Yin, Zuotian 1,4; Wang, Yuhui 1
刊名	ECOLOGICAL INDICATORS
	2022
卷号	141
关键词	Climatechange Rainfall Nitrogenenrichment Drylands Plantfunctionaltraits
ISSN号	1470-160X
DOI	10.1016/j.ecolind.2022.109144
文献子类	Article
英文摘要	Understanding how plant ecophysiological traits of coexisting species within a community respond to environ-mental changes could help to predict the shift in plant community structure and function, but it remains limited in the scenarios of co-occurring precipitation variations and N deposition. A two-year field experiment was conducted to explore the effects of large precipitation changes (reduced and increased precipitation amount by 25% and 50% relative to ambient control) and high N deposition (10 g N m(-2) yr(-1)) on a series of leaf ecophysiological traits of three dominant species (Stipa tianschanica, a C-3 grass; Cleistogenes squarrosa, a C4 grass; and Artemisia capillaris, a C-3 forb) in a desert steppe in Northern China. Increasing precipitation significantly linearly promoted the leaf light-saturated photosynthesis rate (Asat) and N use efficiency of the two C-3 species, irrespective of N addition. The rises in Asat of both C-3 species were mainly caused by increased soil moisture, which strongly induced increases in leaf stomatal conductance (gs) and declines in quantum yield of photosystem II (phi PSII). However, the Asat of the two C3 species was weakly correlated with their specific leaf area and leaf N concentration, whereas the Asat of the C4 grass was negatively related to its leaf N. Moreover, the Asat, height, and aboveground biomass of the forbs were much more water-sensitive than those of both grass species, with a consequence of the most dominant species turning from grass to forbs as precipitation increased. Our findings highlight that water limitation, rather than N deficit, is the largest factor controlling plant growth in drylands, and plant species-specific ecophysiological responses to precipitation fluctuations will cause a substantial shift in the production and composition of plant community.
学科主题	Biodiversity Conservation ; Environmental Sciences
电子版国际标准刊号	1872-7034
出版地	AMSTERDAM
WOS关键词	GLOBAL RESPONSE PATTERNS ; NITROGEN LIMITATION ; C-4 GRASSES ; LEAF TRAITS ; WATER ; PHOTOSYNTHESIS ; PRODUCTIVITY ; DROUGHT ; CLIMATE ; ECOSYSTEMS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000856279600003
资助机构	Strategic Priority Research Program of Chinese Academy of Sciences [XDA26010103] ; National Natural Science Foundation of China [32101438, 41775108, 41975145] ; China Special Fund for Meteorological Research in the Public Interest (Major projects) [GYHY201506001-3] ; Science and Technology Project of the Jilin Provincial Education Department [JJKH20211300KJ]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/29050]
专题	植被与环境变化国家重点实验室
作者单位	1.Northeast Normal Univ, Inst Grassland Sci, Key Lab Vegetat Ecol, Jilin Songnen Grassland Ecosyst Natl Observat & Re, Changchun 130024, Peoples R China 2.China Meteorol Adm, Acad Meteorol Sci, Beijing 100081, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Wetland Ecol & Environm, Heilongjiang Xingkai Lake Wetland Ecosyst Natl Obs, Changchun 130102, Jilin, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 6.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Ma, Quanhui,Li, Yibo,Zhu, Yu,et al. Precipitation variations, rather than N deposition, determine plant ecophysiological traits in a desert steppe in Northern China[J]. ECOLOGICAL INDICATORS,2022,141.
APA	Ma, Quanhui.,Li, Yibo.,Zhu, Yu.,Liu, Xiaodi.,Yu, Hongying.,...&Xu, Zhenzhu.(2022).Precipitation variations, rather than N deposition, determine plant ecophysiological traits in a desert steppe in Northern China.ECOLOGICAL INDICATORS,141.
MLA	Ma, Quanhui,et al."Precipitation variations, rather than N deposition, determine plant ecophysiological traits in a desert steppe in Northern China".ECOLOGICAL INDICATORS 141(2022).