DOI: 10.1002/gbc.20046
Scopus记录号: 2-s2.0-84879442744
论文题名: Processes affecting greenhouse gas production in experimental boreal reservoirs
作者: Venkiteswaran J ; J ; , Schiff S ; L ; , St ; Louis V ; L ; , Matthews C ; J ; D ; , Boudreau N ; M ; , Joyce E ; M ; , Beaty K ; G ; , Bodaly R ; A
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 2 起始页码: 567
结束页码: 577
语种: 英语
英文关键词: carbon dioxide
; greenhouse gases
; methane
; reservoirs
Scopus关键词: Boreal forests
; Community respiration
; Greenhouse gas production
; Greenhouse gases (GHG)
; Net primary production
; Primary production
; Production of
; Water columns
; Budget control
; Carbon
; Carbon dioxide
; Environmental impact
; Floods
; Greenhouse gases
; Isotopes
; Methane
; Oxidation
; Petroleum reservoirs
; Reservoirs (water)
; boreal forest
; carbon dioxide
; decomposition
; flooding
; greenhouse gas
; methane
; net primary production
; oxidation
; respiration
; soil water potential
; water mass
英文摘要: Flooding land for water reservoir creation has many environmental impacts including the production of the greenhouse gases (GHG) carbon dioxide (CO 2) and methane (CH4). To assess processes governing GHG emissions from the flooding of terrestrial carbon, three experimental reservoirs were constructed in upland boreal forest areas of differing carbon stores as part of the Flooded Upland Dynamics Experiment (FLUDEX). We calculated process-based GHG budgets for these reservoirs over 5 years following the onset of flooding. Stable isotopic budgets of carbon were necessary to separate community respiration (CR), which produces CO2, from net primary production (NPP), which consumes CO2, and to separate CH4 production from CH4 consumption via oxidation. NPP removed up to 44% of the CO2 produced from CR. CR and NPP exhibited different year-after-year trends. CH4 flux to the atmosphere increased about twofold over 3 years, yet isotopic budgets showed CH4 production in flooded soils increased nearly tenfold. CH4 oxidation near the flooded soil-water interface greatly decreased the CH4 flux from the water column to the atmosphere. Ebullition was the most important conduit of CH4 to the atmosphere after 3 years. Although CH4 production increased with time, the total GHG flux, in CO2 equivalents, declined. Contrary to expectations, neither CR nor total GHG fluxes were directly related to the quantity of organic carbon flooded. Instead, these reservoirs produced a strikingly similar amount of CO2 equivalents over 5 years. Key Points GHG fluxes were strongly affected by primary production and CH4 oxidation Decomposition and GHG fluxes not directly related to amount of flooded organic C Isotopes were required to calculate rates of biogeochem GHG processes ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77640
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth and Environmental Sciences, University of Waterloo, 200 University Ave. W., Waterloo, ON N2L 3G1, Canada; Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada; Experimental Lakes Area, Fisheries and Oceans Canada, Winnipeg, MT, Canada
Recommended Citation:
Venkiteswaran J,J,, Schiff S,et al. Processes affecting greenhouse gas production in experimental boreal reservoirs[J]. Global Biogeochemical Cycles,2013-01-01,27(2)