干旱区生态环境知识资源中心(Arid): Seasonal variations of plant water use in the karst desertification control

Arid

DOI	10.1016/j.scitotenv.2023.163778
	Seasonal variations of plant water use in the karst desertification control
	Cai, Lulu; Xiong, Kangning; Liu, Ziqi; Li, Yuan; Fan, Bo
通讯作者	Xiong, KN
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2023
卷号	885
英文摘要	Understanding the water use characteristics of plants is crucial for the sustainability of forest water management and vegetation restoration. The vegetation restoration program in the karst desertification areas of southwest China has been implemented for more than two decades, and remarkable achievements have been made in ecological restoration. However, the water use characteristics of revegetation are still poorly understood. We investigated the water uptake patterns and water use efficiency of four woody plants (Juglans regia, Zanthoxylum bungeanum, Eriobotrya japonica, and Lonicera japonica) using stable isotopes (delta H-2, delta O-18, and delta C-13) in combination with the MixSIAR model. The results showed that plants responded to seasonal changes in soil moisture with flexible water uptake patterns. Differences in water use sources among the four plant species during the growing season indicated the occurrence of hydrological niche separation, which is the key to vegetation symbiosis. Throughout the study period, groundwater made the lowest contribution to plants (9.39 %similar to 16.25 %), and fissure soil water made the highest contribution (39.74 %similar to 64.71 %). Among them, shrubs and vines were more dependent on fissure soil water compared to trees (50.52 %similar to 64.71 %). Furthermore, plant foliar delta C-13 was higher in the dry season than in the rainy season. Evergreen shrubs (-27.94 %o) exhibited higher water use efficiency compared to other tree species (-30.48 %o similar to-29.04 %o). The water use efficiency of four plants showed seasonal variation and was influenced by the water availability caused by soil moisture. Our study demonstrates that fissure soil water is an important water source for karst desertification revegetation and that seasonal changes in water use characteristics are influenced by species-level water uptake patterns and water use strategies. This study provides a reference for vegetation restoration and water resource management in karst areas.
英文关键词	Stable isotope Water uptake pattern Water use efficiency Fissure soil water Karst
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001026038700001
WOS关键词	CARBON-ISOTOPE DISCRIMINATION ; STABLE-ISOTOPES ; USE EFFICIENCY ; USE PATTERNS ; USE STRATEGIES ; DOLOMITE OUTCROPS ; EDWARDS PLATEAU ; CLIMATE-CHANGE ; SOIL-WATER ; DROUGHT
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/2XILL650/398531
推荐引用方式 GB/T 7714	Cai, Lulu,Xiong, Kangning,Liu, Ziqi,et al. Seasonal variations of plant water use in the karst desertification control[J],2023,885.
APA	Cai, Lulu,Xiong, Kangning,Liu, Ziqi,Li, Yuan,&Fan, Bo.(2023).Seasonal variations of plant water use in the karst desertification control.SCIENCE OF THE TOTAL ENVIRONMENT,885.
MLA	Cai, Lulu,et al."Seasonal variations of plant water use in the karst desertification control".SCIENCE OF THE TOTAL ENVIRONMENT 885(2023).