干旱区生态环境知识资源中心(Arid): Differential stoichiometric responses of shrubs and grasses to increased precipitation in a degraded karst ecosystem in Southwestern China

Arid

DOI	10.1016/j.scitotenv.2019.134421
	Differential stoichiometric responses of shrubs and grasses to increased precipitation in a degraded karst ecosystem in Southwestern China
	Umair, Muhammad 1,3; Sun, Ningxiao 1,3,4; Du, Hongmei 2; Chen, Kehao 2; Tao, Huimin 1; Yuan, Jun 1; Abbasi, Arshad Mehmood 5; Liu, Chunjiang 1,3,4
通讯作者	Liu, Chunjiang
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	700
英文摘要	The elemental concentrations of both plants and soils are sensitive to variations in precipitation due to the limiting roles of water on soil processes and plant growth in karst ecosystems of Southwestern China; however, precipitation is predicted to increase in this region. Nevertheless, it is unclear how the elemental composition of soils and plants might respond to such increases in moisture. Particularly, how potassium (K) may behave as a key mediator in the regulation of the water potential of plants. For this study, the responses of the elemental composition of both soils and plants to the variable addition of water were investigated. Two grasses (Cymbopogon distans and Arundinella setosa) and two shrubs (Carissa spinarum and Bauhinia brachycarpa) were investigated under four levels of watering treatments 0%, +20%, +40%, and +60%, relative to the annual rainfall, respectively. Compared to the control (CK), the soil water content (SWC) increased to 3.75, 3.86, and 4.34 mg g(-1) in T1, T2, and T3 groups, respectively (p < 0.05). Non-metal elements (C, H, N, S, and P, except for Si) in the soil were relatively stable with water addition; however, metal elements (Al, Na, Mg, Fe, and K, along with Si) increased significantly, whereas Zn and Ca decreased (p < 0.05). With water addition, leaf N and P remained unchanged in all four species, while K, Mg, and S decreased in both shrubs (higher C:K, N:K, and P:K). Increases in Fe, Si, and K were observed in both grasses (lower C:K, N:K, and P:K), which suggested that K played distinct roles for water regulation in shrubs and grasses. These findings implied that the Science elemental compositions of both soils and plants might be altered with increasing precipitation in the future, where different plant types may adopt distinct K-regulation strategies to cope with variable soil moisture. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	Climate change Foliar K stoichiometry Karst habitats Watering treatments Shrubs Grasses
类型	Article
语种	英语
国家	Peoples R China ; Pakistan
收录类别	SCI-E
WOS记录号	WOS:000499480800018
WOS关键词	AFFINITY K+ UPTAKE ; SOIL-MOISTURE ; RIVER-BASIN ; ROCKY DESERTIFICATION ; PHOSPHORUS LIMITATION ; TERRESTRIAL PLANTS ; DROUGHT SURVIVAL ; SUMMER DORMANCY ; GLOBAL ANALYSIS ; FRESH-WATER
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2020-01-15
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312494
作者单位	1.Shanghai Jiao Tong Univ, Sch Agr & Biol, Shanghai 200240, Peoples R China; 2.Shanghai Jiao Tong Univ, Sch Design, Shanghai 200240, Peoples R China; 3.State Forestry & Grassland Adm, Shanghai Urban Forest Res Stn, Beijing, Peoples R China; 4.Minist Agr, Key Lab Urban Agr South, Beijing, Peoples R China; 5.COMSATS Univ Islamabad, Dept Environm Sci, Abbottabad Campus, Abbottabad 22060, Pakistan
推荐引用方式 GB/T 7714	Umair, Muhammad,Sun, Ningxiao,Du, Hongmei,et al. Differential stoichiometric responses of shrubs and grasses to increased precipitation in a degraded karst ecosystem in Southwestern China[J],2020,700.
APA	Umair, Muhammad.,Sun, Ningxiao.,Du, Hongmei.,Chen, Kehao.,Tao, Huimin.,...&Liu, Chunjiang.(2020).Differential stoichiometric responses of shrubs and grasses to increased precipitation in a degraded karst ecosystem in Southwestern China.SCIENCE OF THE TOTAL ENVIRONMENT,700.
MLA	Umair, Muhammad,et al."Differential stoichiometric responses of shrubs and grasses to increased precipitation in a degraded karst ecosystem in Southwestern China".SCIENCE OF THE TOTAL ENVIRONMENT 700(2020).