干旱区生态环境知识资源中心(Arid): Fire slightly decreases the competitive effects of a thorny cushion shrub in a semi-arid mountain steppe in the short term

Arid

DOI	10.1111/avsc.12575
	Fire slightly decreases the competitive effects of a thorny cushion shrub in a semi-arid mountain steppe in the short term
	Bahalkeh, Khadijeh; Abedi, Mehdi; Dianati Tilaki, Ghasem Ali; Michalet, Richard
通讯作者	Abedi, M (corresponding author), Tarbiat Modares Univ, Fac Nat Resources & Marine Sci, Dept Range Management, Noor, Mazandaran Prov, Iran.
来源期刊	APPLIED VEGETATION SCIENCE
ISSN	1402-2001
EISSN	1654-109X
出版年	2021
卷号	24 期号:2
英文摘要	Questions Studies in alpine environments have highlighted dominant facilitative effects of cushion species for diversity. Many fewer studies have assessed the effects of cushion shrubs in drier and less cold mountain habitats and how these effects vary within the shrub canopy and with increasing drought stress with exposure and disturbance by fire. Location A mountain steppe of the Golestan National Park in the semi-arid climate of northeast Iran. Methods We quantified the cover of understorey species at the center and edge of the canopy of the thorny cushion shrub Onobrychis cornuta and in paired open areas, in north and south exposures and unburned and burned plots, two years after a fire. Soil chemical variables and moisture were measured in treatments. We quantified cushions' center and edge effects on understorey species cover with the Relative Interaction Index (RII). Treatment effects on RII cover were analyzed with generalized linear mixed-effects models (GLMM) and species composition with Correspondence Analysis. Results In unburned plots, competition for cover was very high at cushion centers and strongly decreased at cushion edges. Exposure stress did not affect competition in unburned plots. Fire slightly decreased competition but only at center cushion shrub position and at south exposure. Species composition was mostly affected by exposure and fire treatments, although there was subtle variation in species composition among patches due to fire. Cushion position, fire and exposure treatments affected soil moisture and chemical variables, but soil changes did not explain cushion effects on understorey cover and their variations along treatments. Conclusions The effects of the cushion shrub were highly negative and in particular at cushion center, likely due to interference and competition for light in a dry and not too cold environment. Fire only slightly decreased competition in the short term, likely due to the delayed response of understorey species to disturbance induced by fire.
英文关键词	canopy position competition cushion exposure facilitation fire Golestan National Park Onobrychis cornuta
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000667075000003
WOS关键词	PLANT INTERACTIONS ; POSITIVE INTERACTIONS ; THYLACOSPERMUM-CAESPITOSUM ; HERBACEOUS VEGETATION ; INTERACTIONS INCREASE ; GRADIENT HYPOTHESIS ; PRESCRIBED FIRE ; STRESS ; FACILITATION ; SOIL
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368863
作者单位	[Bahalkeh, Khadijeh; Abedi, Mehdi; Dianati Tilaki, Ghasem Ali] Tarbiat Modares Univ, Fac Nat Resources & Marine Sci, Dept Range Management, Noor, Mazandaran Prov, Iran; [Michalet, Richard] Univ Bordeaux, UMR EPOC 5805, Allee Geoffroy St Hilaire, F-33615 Pessac, France
推荐引用方式 GB/T 7714	Bahalkeh, Khadijeh,Abedi, Mehdi,Dianati Tilaki, Ghasem Ali,et al. Fire slightly decreases the competitive effects of a thorny cushion shrub in a semi-arid mountain steppe in the short term[J],2021,24(2).
APA	Bahalkeh, Khadijeh,Abedi, Mehdi,Dianati Tilaki, Ghasem Ali,&Michalet, Richard.(2021).Fire slightly decreases the competitive effects of a thorny cushion shrub in a semi-arid mountain steppe in the short term.APPLIED VEGETATION SCIENCE,24(2).
MLA	Bahalkeh, Khadijeh,et al."Fire slightly decreases the competitive effects of a thorny cushion shrub in a semi-arid mountain steppe in the short term".APPLIED VEGETATION SCIENCE 24.2(2021).