DOI: 10.1007/s10533-015-0170-8
Scopus记录号: 2-s2.0-84958619153
论文题名: Inter-annual variability in water table depth controls net ecosystem carbon dioxide exchange in a boreal bog
作者: Strachan I.B. ; Pelletier L. ; Bonneville M.-C.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 127, 期: 1 起始页码: 99
结束页码: 111
语种: 英语
英文关键词: Ecosystem respiration
; Gross ecosystem productivity
; Net ecosystem CO2 exchange
; Peatland
; Water table depth
Scopus关键词: air temperature
; annual variation
; biogeochemical cycle
; bog
; Boreal Kingdom
; carbon dioxide
; net ecosystem exchange
; net ecosystem production
; ombrotrophic environment
; peatland
; respiration
; water depth
; water table
; White tip die-back phytoplasma
英文摘要: The net ecosystem carbon dioxide (CO2) exchange (NEE) between boreal bogs and the atmosphere and its environmental drivers remains understudied despite the large carbon store of these northern ecosystems. We present NEE measurements using the eddy covariance technique in a boreal ombrotrophic bog over five growing seasons and four winters. Inter-annual variability in CO2 uptake was most pronounced in June–September (−4 to −122 g CO2–C m−2), less in March–May (−1 to −21 g CO2–C m−2) and very small in October–November (−2 to −4 g CO2–C m−2). Variability in NEE between years was linked primarily to changes in water table depth (WTD). Strong and significant relationships (r2 > 0.89, p ≤ 0.05) were found between summer (June–September) maximum photosynthetic rate (Amax), net ecosystem productivity (NEP), gross ecosystem productivity and WTD. Adding air temperature through multiple regression analysis further increased correlation between summer Amax, NEP, and WTD (r2 = 0.96, p = 0.05). In contrast to previous studies examining controls on peatland CO2 exchange, no relationships were found between productivity or cumulative exchange and early season temperature, timing of the snowmelt or growing season length. © 2015, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83427
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: Department of Natural Resource Sciences, McGill University, 21111 Lakeshore Road, Ste Anne de Bellevue, QC, Canada
Recommended Citation:
Strachan I.B.,Pelletier L.,Bonneville M.-C.. Inter-annual variability in water table depth controls net ecosystem carbon dioxide exchange in a boreal bog[J]. Biogeochemistry,2016-01-01,127(1)