Effect of land-use changes on nitrous oxide (N2O) emission from tropical peatlands

Hadi, Abdul; Inubushi, Kazuyuki; Purnomo, Erry; Razie, Fakhrur; Yamakawa, Keisuke; Tsuruta, Haruo

doi:10.1016/s1465-9972(00)00030-1

Cited by 57 publications

(60 citation statements)

References 6 publications

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“…Therefore, it is not surprising that for low DIN environments, as our study site, the use of emission factors leads to a considerable bias. In line with the data presented here, Borges et al (2015) (Hadi et al, 2000). It is likely that this behavior is mirrored in the aquatic systems as well.…”

Section: Chsupporting

confidence: 90%

Nitrous oxide and methane in two tropical estuaries in a peat-dominated region of northwestern Borneo

et al. 2016

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Abstract. Estuaries are sources of nitrous oxide (N 2 O) and methane (CH 4 ) to the atmosphere. However, our present knowledge of N 2 O and CH 4 emissions from estuaries in the tropics is very limited because data are scarce. In this study, we present first measurements of dissolved N 2 O and CH 4 from two estuaries in a peat-dominated region of northwestern Borneo. Two campaigns (during the dry season in June 2013 and during the wet season in March 2014) were conducted in the estuaries of the Lupar and Saribas rivers. Median N 2 O concentrations ranged between 7.2 and 12.3 nmol L −1 and were higher in the marine end-member (13.0 ± 7.0 nmol L −1 ). CH 4 concentrations were low in the coastal ocean (3.6 ± 0.2 nmol L −1 ) and higher in the estuaries (medians between 10.6 and 64.0 nmol L −1 ). The respiration of abundant organic matter and presumably anthropogenic input caused slight eutrophication, which did not lead to hypoxia or enhanced N 2 O concentrations, however. Generally, N 2 O concentrations were not related to dissolved inorganic nitrogen concentrations. Thus, the use of an emission factor for the calculation of N 2 O emissions from the inorganic nitrogen load leads to an overestimation of the flux from the Lupar and Saribas estuaries. N 2 O was negatively correlated with salinity during the dry season, which suggests a riverine source. In contrast, N 2 O concentrations during the wet season were not correlated with salinity but locally enhanced within the estuaries, implying that there were additional estuarine sources during the wet (i.e., monsoon) season. Estuarine CH 4 distributions were not driven by freshwater input but rather by tidal variations. Both N 2 O and CH 4 concentrations were more variable during the wet season. We infer that the wet season dominates the variability of the N 2 O and CH 4 concentrations and subsequent emissions from tropical estuaries. Thus, we speculate that any changes in the Southeast Asian monsoon system will lead to changes in the N 2 O and CH 4 emissions from these systems. We also suggest that the ongoing cultivation of peat soil in Borneo is likely to increase N 2 O emissions from these estuaries, while the effect on CH 4 remains uncertain.

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Section: Chsupporting

confidence: 90%

Nitrous oxide and methane in two tropical estuaries in a peat-dominated region of northwestern Borneo

et al. 2016

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“…In general, the DF site mean flux rate (0.11 mg N 2 O-N m −2 h −1 ) in this study is among the highest detected for tropical forest peat sites and compares with the reported mean flux of 0.157 mg N 2 O-N m −2 h −1 detected in secondary forest in Barabai in Indonesia (Hadi et al, 2000) and a mean flux of 0.086 mg N 2 O-N m −2 h −1 in regenerating forest in Central Kalimantan (Takakai et al, 2006). (Hadi et al, 2000(Hadi et al, , 2005Furukawa et al, 2005;Takakai et al, 2006). However, Furukawa et al (2005) reported similar and even lower mean fluxes for some agricultural lands.…”

Section: N 2 O Flux Characteristicssupporting

confidence: 84%

“…N 2 O is very stable in the atmosphere with a lifetime of ∼114 years and it has about a 300 times higher global warming potential (GWP) than that of CO 2 on a 100-year time horizon. Most of the published data on N 2 O fluxes in organic soils have been reported for boreal peatlands (reviewed by Maljanen et al, 2010), whereas only limited data are available for tropical peatlands (Hadi et al, 2000;Inubushi et al, 2003;Kiese et al, 2003;Furukawa et al, 2005;Takakai et al, 2006;Melling et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Nitrous oxide fluxes from tropical peat with different disturbance history and management

et al. 2012

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Abstract. Tropical peatlands are one of the most important terrestrial ecosystems in terms of impact on the atmospheric greenhouse gas composition. Currently, greenhouse gas emissions from tropical peatlands following disturbances due to deforestation, drainage or wildfire are substantial. We quantified in situ nitrous oxide (N2O) fluxes during both dry and wet seasons using a closed chamber method at sites that represented differing land uses and land use change intensities in Central Kalimantan, Indonesia. Cumulative N2O fluxes were compared with carbon dioxide (CO2) and methane (CH4) fluxes. The mean N2O flux rates (N2O-N &plusmn: SD, mg m−2 h−1) varied as follows: drained forest (0.112 ± 0.293) > agricultural peat at the Kalampangan site (0.012 ± 0.026) > drained burned peat (0.011 ± 0.018) > agricultural peat at the Marang site (0.0072 ± 0.028) > undrained forest (0.0025 ± 0.053) > clear-felled, drained, recovering forest (0.0022 ± 0.021). The widest N2O flux range was detected in the drained forest (max. 2.312 and min. −0.043 mg N2O-N m−2 h−1). At the other flux monitoring sites the flux ranges remained at about one tenth that of the drained forest site. The highest N2O emission rates were observed at water tables close to the peat surface where also the flux range was widest. Annual cumulative peat surface N2O emissions (expressed in CO2 equivalents as a percentage of the total greenhouse gas (N2O, CO2 and CH4) emissions) were 9.2 % at highest, but typically ~1 %. Average N2O fluxes and also the total of monitored GHG emissions were highest in drainage-affected forest which is characterized by continuous labile nitrogen availability from vegetation, and water tables typically below the surface.

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“…The emissions, however, were much lower than those in temperate peatland 12,30) . This could be due to the presence of a high concentration of sulfate 15,25) which was commonly found in this area due to oxidation of pyrite 1) and was indicated in this study by the low pH (H 2 O 2 ) at A-2 (3.0). The emission rates of N2O and CH4 under laboratory conditions (Fig.…”

Section: Soil Physicochemical and Biological Properties Under Differesupporting

confidence: 51%

Effects of Land-Use Change in Tropical Peat Soil on the Microbial Population and Emission of Greenhouse Gases

Hadi

Haridi²,

Inubushi

et al. 2001

Microb. Environ.

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Effects of land-use change in tropical peatlands on the microbial population and emissions of nitrous oxide (N 2 O), methane (CH 4 ) and carbon dioxide (CO 2 ) were studied in the field and laboratory. The study area covered secondary forest, paddy field and paddy-soybean rotation field in Indonesia.ATP content, and numbers of viable bacteria and fungi, cellulolytic bacteria and fungi, NH 4 + oxidizers and denitrifiers in a paddy-soybean rotation field and paddy field were reduced to 1-30% and 3-90% of those in secondary forest, respectively. The field measurements of greenhouse gas emissions showed that significantly more CH 4 was emitted from paddy field than secondary forest, but no significant difference in the emission of either N 2 O or CO 2 . The laboratory incubation experiment showed that the soil moisture level and land-use change significantly affected the emission of N 2 O, CH 4 and CO 2 . These results suggested that land-use change significantly affected the microbial population and emissions of greenhouse gases.

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Effect of land-use changes on nitrous oxide (N2O) emission from tropical peatlands

Cited by 57 publications

References 6 publications

Nitrous oxide and methane in two tropical estuaries in a peat-dominated region of northwestern Borneo

Nitrous oxide and methane in two tropical estuaries in a peat-dominated region of northwestern Borneo

Nitrous oxide fluxes from tropical peat with different disturbance history and management

Effects of Land-Use Change in Tropical Peat Soil on the Microbial Population and Emission of Greenhouse Gases

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