干旱区生态环境知识资源中心(Arid): Species specificity challenges the predictability of facilitation along a regional desert gradient

Arid

DOI	10.1111/jvs.12909
	Species specificity challenges the predictability of facilitation along a regional desert gradient
	Filazzola, Alessandro; Lortie, Christopher J.; Westphal, Michael F.; Michalet, Richard
通讯作者	Filazzola, A
来源期刊	JOURNAL OF VEGETATION SCIENCE
ISSN	1100-9233
EISSN	1654-1103
出版年	2020
卷号	31 期号:5 页码:887-898
英文摘要	Questions Deserts ecosystems are threatened by shifts in precipitation patterns from climate change. Positive interactions among plants could buffer desert communities from environmental extremes and resource limitations. However, to improve our ability to predict the response of plant interactions and the plant community to environmental change, we must examine the role of species identity in facilitation. Here, we asked: how do species identity, soil nutrients, and aridity drive positive interactions among plants along a regional gradient of semi-arid to hyper-arid. Location California, USA. Methods We selected seven sites located across three deserts in California that cover the geographic range of the benefactor shrubEphedra californica. In two growing seasons and within 30 pairs of shrub-open microsites at each site, we planted seeds of three annual phytometer species selected for their affinity to areas that are semi-arid, arid, or both. In each microsite, we also surveyed the composition of the annual community and measured soil nutrients. Results Shrubs facilitated the semi-arid phytometer species, reduced the hyper-arid phytometer species, and had no effect on the species found throughout the arid gradient. Shrub facilitation on community-level biomass of annual species decreased linearly with aridity to neutral interactions at the most arid sites. In the semi-arid sites, shrubs negatively affected community-level species richness and native species abundance, but increased invasive grasses. Conclusions Idiosyncratic responses of annual plant species to shrub facilitation along an aridity gradient highlight the issue in generalizing plant interactions without considering species-specific differences. Additionally, the effects of shrub facilitation appear to benefit exotic species with competitive traits which can indirectly reduce native species richness in semi-arid ecosystems. Understanding positive interactions in the context of aridity gradients can provide better insights into the expected changes in species composition that will occur as a result of climate change.
英文关键词	aridity climate change deserts facilitation positive interaction stress gradient hypothesis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000547667200001
WOS关键词	PLANT-PLANT INTERACTIONS ; BIOTIC INTERACTIONS ; TREE SEEDLINGS ; STRESS TOLERANCE ; CLIMATE-CHANGE ; COMPETITION ; HYPOTHESIS ; SHRUBS ; RICHNESS ; HETEROGENEITY
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/2XILL650/325011
作者单位	[Filazzola, Alessandro; Lortie, Christopher J.] York Univ, Dept Biol, 4700 Keele St, Toronto, ON M3J 1P3, Canada; [Westphal, Michael F.] Bur Land Management, Cent Coast Field Off, Marina, CA USA; [Michalet, Richard] Univ Bordeaux, Pessac, France
推荐引用方式 GB/T 7714	Filazzola, Alessandro,Lortie, Christopher J.,Westphal, Michael F.,et al. Species specificity challenges the predictability of facilitation along a regional desert gradient[J],2020,31(5):887-898.
APA	Filazzola, Alessandro,Lortie, Christopher J.,Westphal, Michael F.,&Michalet, Richard.(2020).Species specificity challenges the predictability of facilitation along a regional desert gradient.JOURNAL OF VEGETATION SCIENCE,31(5),887-898.
MLA	Filazzola, Alessandro,et al."Species specificity challenges the predictability of facilitation along a regional desert gradient".JOURNAL OF VEGETATION SCIENCE 31.5(2020):887-898.