干旱区生态环境知识资源中心(Arid): Establishment of a desert foundation species is limited by exotic plants and light but not herbivory or water

Arid

DOI	10.1111/avsc.12515
	Establishment of a desert foundation species is limited by exotic plants and light but not herbivory or water
	Filazzola, Alessandro; Brown, Charlotte; Westphal, Michael; Lortie, Christopher J.
通讯作者	Filazzola, A
来源期刊	APPLIED VEGETATION SCIENCE
ISSN	1402-2001
EISSN	1654-109X
出版年	2020
卷号	23 期号:4 页码:586-597
英文摘要	Questions The biodiversity of deserts is becoming increasingly threatened due to global change including the introduction of invasive species. Desert shrubs are foundational species that can facilitate native plant communities but can also benefit exotic species. The influence of exotic plants on the establishment of benefactors from seeds or seedlings is a critical knowledge gap. We tested if the establishment, survival, or growth of seedlings for a benefactor shrub species in California was reduced by the invasive grasses that they facilitate in the field. Location San Joaquin Desert, California, USA. Methods We conducted a field survey to determine if a native shrub,Ephedra californica, facilitated the invasive grassBromus madritensis. Using seed collected from the field, we conducted a competition experiment onEphedra californica, using a densities series ofBromus madritensisand under manipulated conditions of light, water, and simulated herbivory. We measured seedling establishment, survival, and biomass ofEphedra californicaandBromus madritensis. Results In the field,Ephedra californicafacilitatedBromus madritensiswithin the shrub canopy. In the competition experiment,Bromus madritensishad consistent negative effects onEphedra californicaemergence and seedling survival at all resource and herbivory levels. The emergence and survival ofEphedra californicawas reduced in low light, but none of the manipulated conditions increased the competitive effect ofBromus madritensis. Conclusions Reciprocal costs of facilitation by shrubs were evident in emergence and seedling survival but not in growth once established. Water, herbivory, and shade did not mitigate these costs, but also did not exacerbate competition from exotics. Direct competition with exotic plant species is the most significant impact tested here on dryland shrub species and manipulations of resources or herbivory may not effectively promote shrub recruitment. Native shrubs are well adapted to variable desert conditions and could be effective foundational species if invasive grasses are reduced.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000556425200001
WOS关键词	BROME BROMUS-RUBENS ; STRESS-GRADIENT HYPOTHESIS ; CLIMATE-CHANGE ; FACILITATION COMPLEXES ; SEED-GERMINATION ; COVER CHANGE ; COMPETITION ; INVASION ; INTERFERENCE ; COMMUNITIES
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/2XILL650/325459
作者单位	[Filazzola, Alessandro; Lortie, Christopher J.] York Univ, Dept Biol, 4700 Keele St, Toronto, ON M3J 1P3, Canada; [Filazzola, Alessandro; Brown, Charlotte] Univ Alberta, Biol Sci, Edmonton, AB, Canada; [Westphal, Michael] Bur Land Management, Cent Coast Field Off, Marina, CA USA
推荐引用方式 GB/T 7714	Filazzola, Alessandro,Brown, Charlotte,Westphal, Michael,et al. Establishment of a desert foundation species is limited by exotic plants and light but not herbivory or water[J],2020,23(4):586-597.
APA	Filazzola, Alessandro,Brown, Charlotte,Westphal, Michael,&Lortie, Christopher J..(2020).Establishment of a desert foundation species is limited by exotic plants and light but not herbivory or water.APPLIED VEGETATION SCIENCE,23(4),586-597.
MLA	Filazzola, Alessandro,et al."Establishment of a desert foundation species is limited by exotic plants and light but not herbivory or water".APPLIED VEGETATION SCIENCE 23.4(2020):586-597.