DOI: 10.1111/gcb.12411
论文题名: Long-term response of a Mojave Desert winter annual plant community to a whole-ecosystem atmospheric CO2 manipulation (FACE)
作者: Smith S.D. ; Charlet T.N. ; Zitzer S.F. ; Abella S.R. ; Vanier C.H. ; Huxman T.E.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期: 3 起始页码: 879
结束页码: 892
语种: 英语
英文关键词: Bromus
; Desert annuals
; Elevated CO2
; Free-air CO2 enrichment
; Invasive species
; Lepidium
; Mojave Desert
; Primary productivity
; Seed bank
Scopus关键词: annual plant
; carbon dioxide
; El Nino
; growth response
; invasive species
; long-term change
; plant community
; primary production
; seed bank
; Mojave Desert
; Nevada
; United States
; Bromus
; Bromus rubens
; Dicotyledoneae
; Lepidium
; Poaceae
; carbon dioxide
; article
; biomass
; Bromus
; desert annuals
; desert climate
; ecosystem
; elevated CO2
; free-air CO2 enrichment
; introduced species
; invasive species
; Lepidium
; Mojave Desert
; physiology
; plant physiology
; primary productivity
; reproduction
; season
; seed bank
; United States
; Bromus
; desert annuals
; elevated CO2
; free-air CO2 enrichment
; invasive species
; Lepidium
; Mojave Desert
; primary productivity
; seed bank
; Biomass
; Bromus
; Carbon Dioxide
; Desert Climate
; Ecosystem
; Introduced Species
; Lepidium
; Nevada
; Plant Physiological Processes
; Reproduction
; Seasons
英文摘要: Desert annuals are a critically important component of desert communities and may be particularly responsive to increasing atmospheric (CO2) because of their high potential growth rates and flexible phenology. During the 10-year life of the Nevada Desert FACE (free-air CO2 enrichment) Facility, we evaluated the productivity, reproductive allocation, and community structure of annuals in response to long-term elevated (CO2) exposure. The dominant forb and grass species exhibited accelerated phenology, increased size, and higher reproduction at elevated (CO2) in a wet El Niño year near the beginning of the experiment. However, a multiyear dry cycle resulted in no increases in productivity or reproductive allocation for the remainder of the experiment. At the community level, early indications of increased dominance of the invasive Bromus rubens at elevated (CO2) gave way to an absence of Bromus in the community during a drought cycle, with a resurgence late in the experiment in response to higher rainfall and a corresponding high density of Bromus in a final soil seed bank analysis, particularly at elevated (CO2). This long-term experiment resulted in two primary conclusions: (i) elevated (CO2) does not increase productivity of annuals in most years; and (ii) relative stimulation of invasive grasses will likely depend on future precipitation, with a wetter climate favoring invasive grasses but currently predicted greater aridity favoring native dicots. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61970
Appears in Collections: 影响、适应和脆弱性
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作者单位: School of Life Sciences, University of Nevada, 4505 S. Maryland Parkway, Las Vegas, NV 89154-4022, United States; Division of Ecosystem and Earth Sciences, Desert Research Institute, 755 E. Flamingo Road, Las Vegas, NV 89119, United States; Biological Resource Management Division, National Park Service, Washington Office, Natural Resource Stewardship and Science Directorate, 1201 Oakridge Drive, Ft. Collins, CO 80525, United States; Ecology and Evolutionary Biology, University of California, Irvine, CA 92697-2525, United States; Center for Environmental Biology, University of California, Irvine, CA 92697-1450, United States
Recommended Citation:
Smith S.D.,Charlet T.N.,Zitzer S.F.,et al. Long-term response of a Mojave Desert winter annual plant community to a whole-ecosystem atmospheric CO2 manipulation (FACE)[J]. Global Change Biology,2014-01-01,20(3)