DOI: 10.1111/gcb.12273
论文题名: Contrasting responses of heterotrophic and autotrophic respiration to experimental warming in a winter annual-dominated prairie
作者: Li D. ; Zhou X. ; Wu L. ; Zhou J. ; Luo Y.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 11 起始页码: 3553
结束页码: 3564
语种: 英语
英文关键词: Autotrophic respiration
; Climate warming
; Climate-carbon feedback
; Clipping
; Grasslands
; Heterotrophic respiration
; Soil respiration
Scopus关键词: autotrophy
; carbon cycle
; carbon dioxide
; climate change
; clipping
; grassland
; heterotrophy
; radon
; rhodium
; soil respiration
; warming
; winter
; Great Plains
; Bromus
; angiosperm
; article
; autotrophic respiration
; autotrophy
; biomass
; climate change
; climate warming
; climate-carbon feedback
; clipping
; grasslands
; heterotrophic respiration
; heterotrophy
; physiology
; soil
; soil respiration
; United States
; autotrophic respiration
; climate warming
; climate-carbon feedback
; clipping
; grasslands
; heterotrophic respiration
; soil respiration
; Angiosperms
; Autotrophic Processes
; Biomass
; Climate Change
; Heterotrophic Processes
; Oklahoma
; Soil
英文摘要: Understanding how soil respiration (Rs) and its source components respond to climate warming is crucial to improve model prediction of climate-carbon (C) feedback. We conducted a manipulation experiment by warming and clipping in a prairie dominated by invasive winter annual Bromus japonicas in Southern Great Plains, USA. Infrared radiators were used to simulate climate warming by 3 °C and clipping was used to mimic yearly hay mowing. Heterotrophic respiration (Rh) was measured inside deep collars (70 cm deep) that excluded root growth, while total soil respiration (Rs) was measured inside surface collars (2-3 cm deep). Autotrophic respiration (Ra) was calculated by subtracting Rh from Rs. During 3 years of experiment from January 2010 to December 2012, warming had no significant effect on Rs. The neutral response of Rs to warming was due to compensatory effects of warming on Rh and Ra. Warming significantly (P < 0.05) stimulated Rh but decreased Ra. Clipping only marginally (P < 0.1) increased Ra in 2010 but had no effect on Rh. There were no significant interactive effects of warming and clipping on Rs or its components. Warming stimulated annual Rh by 22.0%, but decreased annual Ra by 29.0% across the 3 years. The decreased Ra was primarily associated with the warming-induced decline of the winter annual productivity. Across the 3 years, warming increased Rh/Rs by 29.1% but clipping did not affect Rh/Rs. Our study highlights that climate warming may have contrasting effects on Rh and Ra in association with responses of plant productivity to warming. © 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/62296
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Microbiology and Plant Biology, University of Oklahoma, Norman, Ok 73019, United States; Coastal Ecosystems Research Station of Yangtze River Estuary, Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Ins. of Biodiv. Sci., School of Life Sci. Res. Inst. for the Changing Global Environ., Fudan Univ., 220 Handan Road, Shanghai 200433, China
Recommended Citation:
Li D.,Zhou X.,Wu L.,et al. Contrasting responses of heterotrophic and autotrophic respiration to experimental warming in a winter annual-dominated prairie[J]. Global Change Biology,2013-01-01,19(11)