干旱区生态环境知识资源中心(Arid): Differences and spatial variations of plant leaf calorific value in deserts of the Hexi Corridor, Northwestern China

Arid

DOI	10.1016/j.scitotenv.2022.155335
	Differences and spatial variations of plant leaf calorific value in deserts of the Hexi Corridor, Northwestern China
	Wang, Lilong; Li, Yuqiang; Wang, Xuyang; Duan, Yulong; Zhao, Zhenxian
通讯作者	Li, YQ
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2022
卷号	834
英文摘要	The leaf calorific value (LCV) is an important trait that indicates how efficiently a plant utilizes natural resources to capture energy. However, little is known about the LCV characteristics of plants in arid and hyper-arid environments. To investigate the spatial patterns and variations in LCV of desert plants and their possible causes, we collected 343 leaf samples of 52 species along a 1000-km transect in the desert area of northwestern China. We analyzed the gross calorific value (GCV), ash-free calorific value (AFCV), carbon content (CC), nitrogen content (NC), and ash content (AC) of the leaves. The mean leaf GCV and AC were 16.2 kJ g(-1) (range from 8.9 to 20.1 kJ g(-1)), and 189.8 mg g(-1) (range from 61.5 to 495.1 mg g(-1)) respectively, which differ significantly from the values for plants growing in more humid areas of China. Succulence was the dominant trait that drove the differences in leaf GCV and AFCV among plant functional groups. Succulent plants had significantly lower leaf GCV and AFCV, and significantly higher AC, than non-succulent plants, indicating that the investment of energy for succulent plants in response to drought stress may be lower than that for non-succulent plants. Among the biological factors that affected LCV, the CC and AC were the main determinants of leaf GCV, whereas CC and NC were the main determinants of leaf AFCV. Drought stress is an environmental constraint that has a direct negative effect on both leaf GCV and AFCV, but its contribution may be weaker than phylogenetic effects. Our results suggest that LCV is a useful leaf trait that can be used to evaluate plant-environment interactions from an energy perspective.
英文关键词	Arid region Desert ecosystem Hexi corridor Energy Succulent plants
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000832996700011
WOS关键词	MECHANISMS ; COMMUNITY ; TRAITS ; SOIL
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394379
推荐引用方式 GB/T 7714	Wang, Lilong,Li, Yuqiang,Wang, Xuyang,et al. Differences and spatial variations of plant leaf calorific value in deserts of the Hexi Corridor, Northwestern China[J],2022,834.
APA	Wang, Lilong,Li, Yuqiang,Wang, Xuyang,Duan, Yulong,&Zhao, Zhenxian.(2022).Differences and spatial variations of plant leaf calorific value in deserts of the Hexi Corridor, Northwestern China.SCIENCE OF THE TOTAL ENVIRONMENT,834.
MLA	Wang, Lilong,et al."Differences and spatial variations of plant leaf calorific value in deserts of the Hexi Corridor, Northwestern China".SCIENCE OF THE TOTAL ENVIRONMENT 834(2022).