气候变化领域集成服务门户(CCPortal): Shrub-mediated effects on soil nitrogen determines shrub-herbaceous interactions in drylands of the Tibetan Plateau

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DOI	10.3389/fpls.2023.1137365
	Shrub-mediated effects on soil nitrogen determines shrub-herbaceous interactions in drylands of the Tibetan Plateau
	Cui, Guangshuai; Pugnaire, Francisco I.; Yang, Liu; Zhao, Wanglin; Ale, Rita; Shen, Wei; Luo, Tianxiang; Liang, Eryuan; Zhang, Lin
发表日期	2023
ISSN	1664-462X
卷号	14
英文摘要	IntroductionShrub promotes the survival, growth and reproduction of understory species by buffering the environmental extremes and improving limited resources (i.e., facilitation effect) in arid and semiarid regions. However, the importance of soil water and nutrient availability on shrub facilitation, and its trend along a drought gradient have been relatively less addressed in water-limited systems. MethodsWe investigated species richness, plant size, soil total nitrogen and dominant grass leaf delta C-13 within and outside the dominant leguminous cushion-like shrub Caragana versicolor along a water deficit gradient in drylands of Tibetan Plateau. ResultsWe found that C. versicolor increased grass species richness but had a negative effect on annual and perennial forbs. Along the water deficit gradient, plant interaction assessed by species richness (RIIspecies) showed a unimodal pattern with shift from increase to decrease, while plant interaction assessed by plant size (RIIsize) did not vary significantly. The effect of C. versicolor on soil nitrogen, rather than water availability, determined its overall effect on understory species richness. Neither the effect of C. versicolor on soil nitrogen nor water availability affected plant size. DiscussionOur study suggests that the drying tendency in association with the recent warming trends observed in drylands of Tibetan Plateau, will likely hinder the facilitation effect of nurse leguminous shrub on understories if moisture availability crosses a critical minimum threshold.
关键词	stress gradient hypothesis water availability soil nitrogen arid shrub facilitation
英文关键词	STRESS-GRADIENT HYPOTHESIS; PLANT INTERACTIONS; POSITIVE INTERACTIONS; SPECIES INTERACTIONS; RETAMA-SPHAEROCARPA; BIOTIC INTERACTIONS; WATER AVAILABILITY; HYDRAULIC LIFT; DROUGHT STRESS; FACILITATION
WOS研究方向	Plant Sciences
WOS记录号	WOS:000937723400001
来源期刊	FRONTIERS IN PLANT SCIENCE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283839
作者单位	Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Consejo Superior de Investigaciones Cientificas (CSIC); CSIC - Estacion Experimental de Zonas Aridas (EEZA); Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Cui, Guangshuai,Pugnaire, Francisco I.,Yang, Liu,et al. Shrub-mediated effects on soil nitrogen determines shrub-herbaceous interactions in drylands of the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2023,14.
APA	Cui, Guangshuai.,Pugnaire, Francisco I..,Yang, Liu.,Zhao, Wanglin.,Ale, Rita.,...&Zhang, Lin.(2023).Shrub-mediated effects on soil nitrogen determines shrub-herbaceous interactions in drylands of the Tibetan Plateau.FRONTIERS IN PLANT SCIENCE,14.
MLA	Cui, Guangshuai,et al."Shrub-mediated effects on soil nitrogen determines shrub-herbaceous interactions in drylands of the Tibetan Plateau".FRONTIERS IN PLANT SCIENCE 14(2023).