DOI: 10.1016/j.foreco.2013.01.007
Scopus记录号: 2-s2.0-84877921962
论文题名: Response of ecosystem carbon fluxes to drought events in a poplar plantation in Northern China
作者: Zhou J. ; Zhang Z. ; Sun G. ; Fang X. ; Zha T. ; McNulty S. ; Chen J. ; Jin Y. ; Noormets A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 300 起始页码: 33
结束页码: 42
语种: 英语
英文关键词: Drought
; Ecosystem respiration
; Gross ecosystem productivity
; Net ecosystem productivity
; Poplar plantation
Scopus关键词: Ecosystem respiration
; Environmental conditions
; Gross ecosystem productivities
; Interannual variability
; Net ecosystem exchange
; Net ecosystem production
; Net ecosystem productivities
; Poplar plantation
; Carbon
; Drought
; Forestry
; Irrigation
; Productivity
; Ecosystems
; annual variation
; atmosphere-biosphere interaction
; carbon flux
; carbon sink
; deciduous forest
; drought
; eddy covariance
; energy flux
; environmental conditions
; flooding
; growing season
; irrigation system
; net ecosystem exchange
; net ecosystem production
; plantation forestry
; rainfall
; water availability
; Carbon
; Drought
; Ecosystems
; Forestry
; Irrigation
; Plantations
; Populus
; Productivity
; Respiration
; Beijing [China]
; China
; Daxing
; Populus
英文摘要: Poplar plantations are widely used for timber production and ecological restoration in northern China, a region that experiences frequent droughts and water scarcity. An open-path eddy-covariance (EC) system was used to continuously measure the carbon, water, and energy fluxes in a poplar plantation during the growing season (i.e., April-October) over the period 2006-2008 in the Daxing District of Beijing, China. We examined the seasonal and inter-annual variability of gross ecosystem productivity (GEP), net ecosystem exchange (NEE), and ecosystem respiration (ER). Although annual total precipitation was the lowest in 2006, natural rainfall was amended by flood irrigation. In contrast, no supplementary water was provided during a severe drought in spring (i.e., April-June), 2007, resulting in a significant reduction in net ecosystem production (NEP=-NEE). This resulted from the combined effects of larger decrease in GEP than that in ER. Despite the drought - induced reduction in NEP, the plantation forest was a strong carbon sink accumulating 591±62, 641±71, and 929±75gCm-2year-1 for 2006, 2007, and 2008, respectively. The timing of the drought significantly affected the annual GEP. Severe drought during canopy development induced a lasting reduction in carbon exchange throughout the growing season, while the severe drought at the end of growing season did not significantly reduce carbon uptake. Additionally, irrigation reduced negative drought impacts on carbon sequestration. Overall, this fast growing poplar plantation is a strong carbon sink and is sensitive to the changes in environmental conditions. © 2013 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66608
Appears in Collections: 影响、适应和脆弱性
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作者单位: Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China; Eastern Forest Environmental Threat Assessment Center, USDA Forest Service, Raleigh, NC, United States; Department of Environmental Sciences, University of Toledo, Toledo, OH, United States; Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, NC, United States
Recommended Citation:
Zhou J.,Zhang Z.,Sun G.,et al. Response of ecosystem carbon fluxes to drought events in a poplar plantation in Northern China[J]. Forest Ecology and Management,2013-01-01,300