Carbon Dioxide and Methane Emissions from Peat Soil in an Undrained Tropical Peat Swamp Forest

被引:27
|
作者
Ishikura, Kiwamu [1 ,5 ]
Hirata, Ryuichi [2 ]
Hirano, Takashi [1 ]
Okimoto, Yosuke [1 ]
Wong, Guan Xhuan [1 ,3 ]
Melling, Lulie [3 ]
Aeries, Edward Baran [3 ]
Kiew, Frankie [1 ,3 ]
Lo, Kim San [3 ]
Musin, Kevin Kemudang [3 ]
Waili, Joseph Wenceslaus [3 ]
Ishii, Yoshiyuki [4 ]
机构
[1] Hokkaido Univ, Res Fac Agr, Kita Ku, Kita 9,Nishi 9, Sapporo, Hokkaido 0608589, Japan
[2] Natl Inst Environm Studies, Ctr Global Environm Res, Tsukuba, Ibaraki 3058506, Japan
[3] Sarawak Trop Peat Res Inst, Lot 6035,Kuching Kota Samarahan Expressway, Sarawak 94300, Malaysia
[4] Hokkaido Univ, Inst Low Temp Sci, Kita Ku, Kita 19,Nishi 8, Sapporo, Hokkaido 0600819, Japan
[5] Hokkaido Res Org, Tokachi Agr Expt Stn, Prod & Environm Grp, 9-2 Shinsei Minami, Memuro, Hokkaido 0820081, Japan
关键词
automated chamber system; groundwater level; heterotrophic respiration; methane flux; oxidative peat decomposition; soil respiration; trenching; GREENHOUSE-GAS EMISSIONS; OIL PALM PLANTATION; LAND-USE CHANGE; OXIDATIVE PEAT; NITROUS-OXIDE; ECOSYSTEMS; MICROBIAL BIOMASS; WATER MANAGEMENT; ORGANIC-MATTER; CO2; EMISSIONS;
D O I
10.1007/s10021-019-00376-8
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
This study investigates the factors controlling the soil CO2 and CH4 fluxes and quantifies annual cumulative soil respiration (R-S), heterotrophic respiration (R-H), and soil CH4 emission in an undrained forest on tropical peat by continuous measurement using an automated chamber system for 2 years. Daily mean soil CO2 flux was increased by lowering groundwater level (GWL), which indicates oxidative peat decomposition is promoted by the enhancement of aeration. On the other hand, soil CH4 flux showed a bell-shaped relationship with GWL, which suggested that the development of anaerobic conditions promoted CH4 production by the rise in GWL, whereas hydrostatic pressure suppressed CH4 diffusion when the GWL was above the peat surface. Mean annual gap-filled CO2 emissions were 926 +/- 610 and 891 +/- 476 g C m(-2) y(-1) (mean +/- 1 SD) for RS (n = 10) and RH (n = 6), respectively, and were not significantly different from each other. The annual RH in this study was similar to that of previous studies despite the higher annual mean GWL in this study, possibly due to the inclusion of litter decomposition in contrast to most of the previous studies in tropical peatland. Mean annual gap-filled CH4 emission was 4.32 +/- 3.95 g C m(-2) y(-1) (n = 9), which was the high end of the previous studies in tropical peatland due to higher annual mean GWL in this study. In conclusion, RS was lower and CH4 emission was higher in the undrained peat swamp forest than those previously reported for drained and disturbed forests on tropical peat.
引用
收藏
页码:1852 / 1868
页数:17
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