DOI: 10.1111/gcb.12296
论文题名: Carbon dioxide emissions through oxidative peat decomposition on a burnt tropical peatland
作者: Hirano T. ; Kusin K. ; Limin S. ; Osaki M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期: 2 起始页码: 555
结束页码: 565
语种: 英语
英文关键词: Carbon balance
; Chamber technique
; Ecosystem respiration
; Groundwater level
; Heterotrophic respiration
; Peat fire
; Peat oxidation
; Peat swamp forest
; Soil temperature
; Southeast Asia
Scopus关键词: carbon balance
; carbon dioxide
; carbon emission
; carbon flux
; El Nino
; groundwater
; heterotrophy
; land management
; oxidation
; peat
; peatland
; respiration
; soil temperature
; swamp forest
; water level
; Borneo
; Indonesia
; Kalimantan
; carbon dioxide
; article
; Borneo
; carbon balance
; chamber technique
; chemistry
; ecosystem respiration
; fire
; groundwater level
; heterotrophic respiration
; Indonesia
; metabolism
; oxidation reduction reaction
; peat fire
; peat oxidation
; peat swamp forest
; season
; soil
; soil temperature
; Southeast Asia
; wetland
; carbon balance
; chamber technique
; ecosystem respiration
; groundwater level
; heterotrophic respiration
; peat fire
; peat oxidation
; peat swamp forest
; soil temperature
; Southeast Asia
; Borneo
; Carbon Dioxide
; Fires
; Indonesia
; Oxidation-Reduction
; Seasons
; Soil
; Wetlands
英文摘要: In Southeast Asia, a huge amount of peat has accumulated under swamp forests over millennia. Fires have been widely used for land clearing after timber extraction, thus land conversion and land management with logging and drainage are strongly associated with fire activity. During recent El Niño years, tropical peatlands have been severely fire-affected and peatland fires enlarged. To investigate the impact of peat fires on the regional and global carbon balances, it is crucial to assess not only direct carbon emissions through peat combustion but also oxidative peat decomposition after fires. However, there is little information on the carbon dynamics of tropical peat damaged by fires. Therefore, we continuously measured soil CO2 efflux [peat respiration (RP)] through oxidative peat decomposition using six automated chambers on a burnt peat area, from which about 0.7 m of the upper peat had been lost during two fires, in Central Kalimantan, Indonesia. The RP showed a clear seasonal variation with higher values in the dry season. The RP increased logarithmically as groundwater level (GWL) lowered. Temperature sensitivity or Q10 of RP decreased as GWL lowered, mainly because the vertical distribution of RP would shift downward with the expansion of an unsaturated soil zone. Although soil temperature at the burnt open area was higher than that in a near peat swamp forest, model simulation suggests that the effect of temperature rise on RP is small. Annual gap-filled RP was 382 ± 82 (the mean ± 1 SD of six chambers) and 362 ± 74 gC m-2 yr-1 during 2004-2005 and during 2005-2006 years, respectively. Simulated RP showed a significant negative relationship with GWL on an annual basis, which suggests that every GWL lowering by 0.1 m causes additional RP of 89 gC m-2 yr-1. The RP accounted for 21-24% of ecosystem respiration on an annual basis. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62020
Appears in Collections: 影响、适应和脆弱性
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作者单位: Research Faculty of Agriculture, Hokkaido University, Sapporo, 060-8589, Japan; CIMTROP, University of Palangkaraya, Palangkaraya, 73112, Indonesia
Recommended Citation:
Hirano T.,Kusin K.,Limin S.,et al. Carbon dioxide emissions through oxidative peat decomposition on a burnt tropical peatland[J]. Global Change Biology,2014-01-01,20(2)