DOI: 10.1007/s10533-017-0400-3
Scopus记录号: 2-s2.0-85040929186
论文题名: Methane fluxes from tree stems and soils along a habitat gradient
作者: Pitz S.L. ; Megonigal J.P. ; Chang C.-H. ; Szlavecz K.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 137, 期: 3 起始页码: 307
结束页码: 320
语种: 英语
英文关键词: C cycle
; Methane
; Trees
; Upland forest
; Wetland forest
Scopus关键词: carbon cycle
; carbon flux
; environmental gradient
; flux measurement
; forest
; habitat structure
; methane
; soil emission
; stem
; transition zone
; tree
; upland region
; wetland
英文摘要: Forests are major sources of terrestrial CH4 and CO2 fluxes but not all surfaces within forests have been measured and accounted for. Stem respiration is a well-known source of CO2, but more recently tree stems have been shown to be sources of CH4 in wetlands and upland habitats. A study transect was established along a natural moisture gradient, with one end anchored in a forested wetland, the other in an upland forest and a transitional zone at the midpoint. Stem and soil fluxes of CH4 and CO2 were measured using static chambers during the 2013 and 2014 growing seasons, from May to October. Mean stem CH4 emissions were 68.8 ± 13.0 (mean ± standard error), 180.7 ± 55.2 and 567.9 ± 174.5 µg m−2 h−1 for the upland, transitional and wetland habitats, respectively. Mean soil methane fluxes in the upland, transitional and wetland were − 64.8 ± 6.2, 7.4 ± 25.0 and 190.0 ± 123.0 µg m−2 h−1, respectively. Measureable CH4 fluxes from tree stems were not always observed, but every individual tree in our experiment released measureable CH4 flux at some point during the study period. These results indicate that tree stems represent overlooked sources of CH4 in forested habitats and warrant investigation to further refine CH4 budgets and inventories. © 2018, Springer International Publishing AG, part of Springer Nature. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83183
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: Johns Hopkins University, 3400 North Charles St, Olin Hall, Baltimore, MD, United States; Smithsonian Environmental Research Center, 647 Contees Wharf Road, Edgewater, MD, United States
Recommended Citation:
Pitz S.L.,Megonigal J.P.,Chang C.-H.,et al. Methane fluxes from tree stems and soils along a habitat gradient[J]. Biogeochemistry,2018-01-01,137(3)