干旱区生态环境知识资源中心(Arid): Shift in nurse effect from facilitation to competition with increasing size of Salix cupularis canopy in a desertified alpine meadow on the Tibetan Plateau

Arid

DOI	10.1016/j.catena.2020.104757
	Shift in nurse effect from facilitation to competition with increasing size of Salix cupularis canopy in a desertified alpine meadow on the Tibetan Plateau
	Liu, Miao; Wang, Yi; Sun, Jian; Zhang, Zhenchao; Xu, Xingliang; Zhou, Huakun; Wu, Gao-lin; Xu, Ming; Tsunekawa, Atsushi; Haregeweyn, Nigussie; Tsubo, Mitsuru
通讯作者	Sun, J
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2020
卷号	195
英文摘要	The Tibetan Plateau is among the most ecologically important and sensitive regions worldwide, which has undergone severe desertification in recent decades, particularly in the Zoige region. In an effort to stem the progression of desertification, shrubs such as Salix cupularis have been planted in some localities in this region. However, the mechanisms whereby the interspecific relationships between these shrubs and the undergrowth vegetation change in response to an increase in shrub canopy area remain unclear. In this study, we examined the traits of plant communities and analysed soil samples under S. cupularis in a degraded alpine meadow along a gradient of four different canopy areas (1.3-1.8, 3.8-5.5, 12.6-14.5, and 27.3-28.3 m(2)). Our results revealed that plant community characteristics shifted from facilitation to competition at a canopy area of 3.8-5.5 m(2). However, changes in soil nutrients and the activities of sucrase and catalase were not detected until the canopy area of S. cupularis had reached 2.6-14.5 m(2). Furthermore, we found that microbial communities, particularly bacteria, showed trends similar to those shown by soil properties. In line with expectations, we found that the soil fungal community showed trends opposite to those shown by the bacterial community. Our findings highlight that competition rather than facilitation tends to be the predominant interspecific relationship that develops in response to the continued growth of nurse plants. Consequently, these results provide evidence in support of the stress-gradient hypothesis, which states that interspecific competition is particularly prevalent in fertile environments, particularly when there are changes in facilitation during periods of increasing environmental stress. Importantly, with respect to the shift in interspecific relationships from facilitative to competitive, we demonstrate that the response of the belowground interactions was slower than that of interactions above ground. Collectively, our observations indicate that the nurse effect of S. cupularis on ecosystems could have significant implications for the restoration of desertified grasslands.
英文关键词	Nurse plant Facilitation Interspecific relationship Degradation Tibetan Plateau
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000580366300019
WOS关键词	SOIL MICROBIAL COMMUNITY ; PLANT-SPECIES RICHNESS ; BELOW-GROUND BIOMASS ; POSITIVE INTERACTIONS ; FUNCTIONAL TRAITS ; ENZYME-ACTIVITIES ; METAANALYSIS ; RESTORATION ; SHRUBS ; GRADIENT
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
来源机构	中国科学院地理科学与资源研究所 ; 西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326961
作者单位	[Liu, Miao; Wang, Yi; Sun, Jian; Zhang, Zhenchao; Xu, Xingliang; Xu, Ming] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Synth Res Ctr Chinese Ecosyst Res Network, Beijing 100101, Peoples R China; [Liu, Miao; Tsunekawa, Atsushi; Tsubo, Mitsuru] Tottori Univ, Arid Land Res Ctr, Tottori 6800001, Japan; [Zhou, Huakun] Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Restorat Ecol Cold Reg Qinghai, Xining 810008, Peoples R China; [Wu, Gao-lin] Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; [Haregeweyn, Nigussie] Tottori Univ, Int Platform Dryland Res & Educ, Tottori 6800001, Japan
推荐引用方式 GB/T 7714	Liu, Miao,Wang, Yi,Sun, Jian,et al. Shift in nurse effect from facilitation to competition with increasing size of Salix cupularis canopy in a desertified alpine meadow on the Tibetan Plateau[J]. 中国科学院地理科学与资源研究所, 西北农林科技大学,2020,195.
APA	Liu, Miao.,Wang, Yi.,Sun, Jian.,Zhang, Zhenchao.,Xu, Xingliang.,...&Tsubo, Mitsuru.(2020).Shift in nurse effect from facilitation to competition with increasing size of Salix cupularis canopy in a desertified alpine meadow on the Tibetan Plateau.CATENA,195.
MLA	Liu, Miao,et al."Shift in nurse effect from facilitation to competition with increasing size of Salix cupularis canopy in a desertified alpine meadow on the Tibetan Plateau".CATENA 195(2020).