干旱区生态环境知识资源中心(Arid): Plant community C:N:P stoichiometry is mediated by soil nutrients and plant functional groups during grassland desertification

Arid

DOI	10.1016/j.ecoleng.2021.106179
	Plant community C:N:P stoichiometry is mediated by soil nutrients and plant functional groups during grassland desertification
	Ning, Zhiying; Zhao, Xueyong; Li, Yulin; Wang, Lilong; Lian, Jie; Yang, Hongling; Li, Yuqiang
通讯作者	Li, YL (corresponding author), Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, 320 Donggang West Rd, Lanzhou, Peoples R China.
来源期刊	ECOLOGICAL ENGINEERING
ISSN	0925-8574
EISSN	1872-6992
出版年	2021
卷号	162
英文摘要	Grassland has sustained serious desertification due to inappropriate human activity in arid and semi-arid areas. This desertification has disrupted ecosystem structure and function. However, desertification on the grassland?s C:N:P stoichiometry (Carbon, Nitrogen, and Phosphorus) are poorly understood, which undermines management and restoration of desertified grassland. To improve our knowledge, we studied a desertification gradient in Northeastern China?s Horqin Sandy Land to determine the effects of desertification on ecosystem function, the plant community, and soil C:N:P stoichiometry. The soil and plant community C, N and P pools decreased during desertification. Under severe desertification, the soil C:N decreased by 17.4%, versus 39.2% for C:P and 50.1% for N:P. This implies non-proportional losses of soil organic C and nutrients, with the greatest loss for organic C, followed by total N and total P. Plant aboveground C:N and C:Pand belowground C:N increased, suggesting increased nutrient utilization efficiency. Canonical correspondence analysis ordination showed that soil N and P significantly affected the plant species composition, which was associated with plant C:N:P. The desertified grassland?s fertility (especially N) directly determined the plant community C, N, and P concentrations and C:N:P ratios. The increased dominance of two psammophytes, Agriophyllum squarrosum and Artemisia halodendron decreased plant community C, N, and P concentrations, but increased C:N and C:P. Thus, plant community C:N:P stoichiometry was mediated by soil nutrients and plant functional groups driven by soil nutrient changes during desertification. The soil nutrient imbalance potentially changed plant community composition, this then altered the soil chemical composition because plant species differ in their element contents and litter inputs. Hence, species with high N content could improve grassland restoration by mitigating N limitations. The native psammophytes A. squarrosum and A. halodendron, with high stress resistance and resource utilization efficiency, could be applied in desertified grassland restoration.
英文关键词	Desertification Soil nutrient Community Ecological stoichiometry Functional group composition
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000632443700006
WOS类目	Ecology ; Engineering, Environmental ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology ; Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349985
作者单位	[Ning, Zhiying; Zhao, Xueyong; Li, Yulin; Wang, Lilong; Lian, Jie; Yang, Hongling; Li, Yuqiang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Naiman Desertificat Res Stn, Lanzhou 730000, Peoples R China; [Ning, Zhiying; Yang, Hongling] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ning, Zhiying,Zhao, Xueyong,Li, Yulin,et al. Plant community C:N:P stoichiometry is mediated by soil nutrients and plant functional groups during grassland desertification[J],2021,162.
APA	Ning, Zhiying.,Zhao, Xueyong.,Li, Yulin.,Wang, Lilong.,Lian, Jie.,...&Li, Yuqiang.(2021).Plant community C:N:P stoichiometry is mediated by soil nutrients and plant functional groups during grassland desertification.ECOLOGICAL ENGINEERING,162.
MLA	Ning, Zhiying,et al."Plant community C:N:P stoichiometry is mediated by soil nutrients and plant functional groups during grassland desertification".ECOLOGICAL ENGINEERING 162(2021).