干旱区生态环境知识资源中心(Arid): The shrub Ephedra californica facilitates arthropod communities along a regional desert climatic gradient

Arid

DOI	10.1002/ecs2.3760
	The shrub Ephedra californica facilitates arthropod communities along a regional desert climatic gradient
	Braun, Jenna; Westphal, Michael; Lortie, Christopher J.
通讯作者	Braun, J (corresponding author), York Univ, Dept Biol, 4700 Keele St, Toronto, ON, Canada.
来源期刊	ECOSPHERE
ISSN	2150-8925
出版年	2021
卷号	12 期号:9
英文摘要	Arthropods underpin arid community dynamics and provide many key ecosystem services. In arid ecosystems, the key habitat components that influence arthropod community structure are relatively understudied. Ephedra californica is a locally abundant shrub now restricted to highly fragmented populations with established positive effects on plant and vertebrate animal communities within the drylands of Southern California. The capacity for these positive effects to further support ground arthropod communities has not been examined. We tested the hypothesis that the physical structure and cover vegetation enhance key measures of arthropod community assembly at nine Californian desert sites that comprise an extensive regional aridity gradient. We contrasted the effects of shrub canopies with ground-covering vegetation on structuring ground-active arthropod communities by surveying ground-active arthropods with pitfall traps and collecting vegetation on the soil surface in the form of residual dry matter (RDM). We collected a total of 5820 individual arthropod specimens for a total of 159 morphospecies. Arthropod abundance and morphospecies richness and RDM biomass and cover were significantly greater beneath the canopy of E. californica throughout the region. Total biomass of RDM did not significantly influence arthropod communities, but cover of RDM on the soil surface negatively influenced arthropod abundance. Neither climatic aridity nor downscaled evaporative stress estimates were significant mediators of the arthropod-vegetation association patterns. Vegetation thus likely has direct and indirect physical effects on arthropod communities. These canopy vs. soil surface vegetation differences will refine sampling of fine-scale patterns of arthropod diversity in drylands. Regional land managers can support arthropod diversity by maintaining populations of foundation shrub species such as E. californica.
英文关键词	aridity arthropods association patterns diversity Ephedra facilitation gradient residual dry matter shrubs stress gradient
类型	Article
语种	英语
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000701322700036
WOS关键词	POSITIVE SPECIES INTERACTIONS ; DIVERSITY ; HYPOTHESIS ; BEETLES ; SPIDER ; COVER ; INVERTEBRATES ; ASSEMBLAGES ; COLEOPTERA ; PREDATION
WOS类目	Ecology
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/2XILL650/363051
作者单位	[Braun, Jenna; Lortie, Christopher J.] York Univ, Dept Biol, 4700 Keele St, Toronto, ON, Canada; [Westphal, Michael] Bur Land Management, Cent Coast Field Off, 940 2nd Ave, Marina, CA 93933 USA
推荐引用方式 GB/T 7714	Braun, Jenna,Westphal, Michael,Lortie, Christopher J.. The shrub Ephedra californica facilitates arthropod communities along a regional desert climatic gradient[J],2021,12(9).
APA	Braun, Jenna,Westphal, Michael,&Lortie, Christopher J..(2021).The shrub Ephedra californica facilitates arthropod communities along a regional desert climatic gradient.ECOSPHERE,12(9).
MLA	Braun, Jenna,et al."The shrub Ephedra californica facilitates arthropod communities along a regional desert climatic gradient".ECOSPHERE 12.9(2021).