DOI: 10.1007/s10533-013-9939-9
Scopus记录号: 2-s2.0-84896403673
论文题名: Interannual variability in the CO2 balance of a boreal patterned fen, James Bay, Canada
作者: Cliche Trudeau N. ; Garneau M. ; Pelletier L.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 118, 期: 2018-01-03 起始页码: 371
结束页码: 387
语种: 英语
英文关键词: Annual balance
; Aqualysis
; Carbon dioxide
; Fen
; Methane
; Pools
Scopus关键词: annual variation
; boreal forest
; carbon balance
; carbon budget
; carbon dioxide
; fen
; growing season
; lichen
; Little Ice Age
; measurement method
; methane
; photosynthesis
; respiration
; tundra
; woodland
; Canada
; James Bay
; La Grande River
; Quebec [Canada]
英文摘要: During 2 years (2009, 2010), CO2 fluxes were measured in an oligotrophic fen located at the ecotonal limit of forest tundra and lichen woodland, in northeastern Canada. Peatlands in this region have registered a rise in surface moisture since Little Ice Age, allowing an increase in their pool size and density. In the studied peatland, 83 % of the surface is covered either with pools (42 %), hollows (28 %) and lawns (13 %) all of which present a mean water table higher than 7 cm. We evaluated how these conditions might influence the CO2 balance in these poor fens located in the northeastern section of the La Grande river watershed. During the two years measurements, results indicate a net CO2 source with 404 (±287) and 272 (±250) g CO2 m-2year-1 emitted to the atmosphere throughout the growing seasons and winters. Modeled wintertime net ecosystem exchange resulted in a net loss of 150 (±36) and 150 (±37) g CO2 m-2 year-1 in 2009 and 2010 respectively, while 248 (±248) and 124 (±195) g CO2 m-2 was emitted during 2009 and 2010 growing seasons. This high CO2 source can be attributed to three factors: (1) the length of the cold season which represented 210-214 days of net CO2 loss (2) a high pool/vegetated surface ratio since pools are a net source of CO2 and presented 38-40 % of the annual spatially weighted CO2 budget and (3) hydroclimatic conditions during the growing season as dryer and warmer conditions in 2009 reduced photosynthesis and increased respiration rates. © 2014 Springer Science+Business Media Dordrecht. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83647
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: GEOTOP-Geochemistry and Geodynamics Research Center and Department of Geography, Université du Québec à Montréal, Montreal, QC, Canada; Department of Natural Resource Sciences, McGill University, Sainte-Anne-de-Bellevue, Montreal, QC, Canada
Recommended Citation:
Cliche Trudeau N.,Garneau M.,Pelletier L.. Interannual variability in the CO2 balance of a boreal patterned fen, James Bay, Canada[J]. Biogeochemistry,2014-01-01,118(2018-01-03)