DOI: 10.1007/s10533-016-0222-8
Scopus记录号: 2-s2.0-84978100686
论文题名: Management driven changes in carbon mineralization dynamics of tropical peat
作者: Jauhiainen J. ; Silvennoinen H. ; Könönen M. ; Limin S. ; Vasander H.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 129, 期: 2018-01-02 起始页码: 115
结束页码: 132
语种: 英语
英文关键词: Anoxia
; CO2 and CH4 production kinetics
; Kalimantan
; Labile carbon
; Land use
; Persistence of soil organic matter
Scopus关键词: anoxia
; biological production
; biomineralization
; carbon dioxide
; land use
; management practice
; methane
; microbial activity
; nutrient dynamics
; peatland
; persistence
; reaction kinetics
; soil organic matter
; tropical environment
; Borneo
; Indonesia
; Kalimantan
英文摘要: Extensive draining at tropical ombrotrophic peatlands in Southeast Asia has made these landscapes a global ‘hot spots’ for greenhouse gas emissions. Management practices and fires have changed substrate status, which affects microbial processes. Here, we present data on how change in management practices affect carbon (C) mineralization processes at these soils. We compared the C mineralization potentials of undrained swamp forest peat to those of abandoned peat (deforested, drained and burned peatlands in degraded condition) at various depths, with and without additional substrates (glucose, glutamate and nitrate), under oxic and anoxic conditions through ex situ experiments. Carbon mineralization (CO2 and CH4 production) rates were higher in the forest peat, with higher litter deposition and C availability. Production rates decreased with peat depth coinciding with decreasing availability of labile C. Consequently, the increase in production rates after labile substrate addition was relatively modest in forest peat as compared to the abandoned site and from the top layers as compared to deeper layers. Methanogenesis had little importance in total C loss. Adding labile C and nitrogen (N) enhanced heterotrophic CO2 production more than only addition of N. Surprisingly, oxygen availability did not limit CO2 production rates, but anoxic respiration also yielded substantial rates, especially at the forest peat. Flooding of these sites will therefore reduce, but not completely cease, peat C-loss. Reintroduced vegetation and fertilization in abandoned peatlands can enrich the peat with labile C and N compounds and thus lead to increased microbiological activity. © 2016, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83373
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 Forest Sciences, University of Helsinki, Helsinki, Finland; Department of Plant and Environmental Sciences, Norwegian University of Life Sciences (UMB), Ås, Norway; Norwegian Institute for Agricultural and Environmental Research (Bioforsk), Ås, Norway; CIMTROP, University of Palangka Raya, Palangka Raya, Indonesia
Recommended Citation:
Jauhiainen J.,Silvennoinen H.,Könönen M.,et al. Management driven changes in carbon mineralization dynamics of tropical peat[J]. Biogeochemistry,2016-01-01,129(2018-01-02)