Seasonal changes of CO2, CH4 and N2O fluxes in relation to land-use change in tropical peatlands located in coastal area of South Kalimantan

Inubushi, Kazuyuki; Furukawa, Yuichiro; Hadi, Abdul; Purnomo, Erry; Tsuruta, Haruo

doi:10.1016/s0045-6535(03)00242-x

Cited by 231 publications

(209 citation statements)

References 9 publications

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Section: Introductioncontrasting

confidence: 74%

“…However, results from current studies were not consistent, ranging from a large increase (Weller et al 2016) to a decrease (Jiang et al 2009) or to no significant impact (Inubushi et al 2003) on soil CH 4 and N 2 O fluxes. The large variability in the effect of land use change on soil CH 4 and N 2 O fluxes was likely linked to specific site conditions, such as soil type, the type of land use change, and management practice used (Inubushi et al 2003;Lin et al 2012). Moreover, most of the existing studies have focused on the comparison of different types of land uses that have been converted for many years (Merino et al 2004;Iqbal et al 2009;Liu et al 2011); little research has been done to understand the dynamics of CH 4 and N 2 O fluxes and the mechanisms behind the observed changes during the initial stages after land use conversion.…”

Section: Introductioncontrasting

confidence: 74%

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Effects of land use conversion and fertilization on CH4 and N2O fluxes from typical hilly red soil

Liu

et al. 2016

Environ Sci Pollut Res

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Land use conversion and fertilization have been widely reported to be important managements affecting the exchanges of greenhouse gases between soil and atmosphere. For comprehensive assessment of methane (CH 4 ) and nitrous oxide (N 2 O) fluxes from hilly red soil induced by land use conversion and fertilization, a 14-month continuous field measurement was conducted on the newly converted citrus orchard plots with fertilization (OF) and without fertilization (ONF) and the conventional paddy plots with fertilization (PF) and without fertilization (PNF). Our results showed that land use conversion from paddy to orchard reduced the CH 4 fluxes at the expense of increasing the N 2 O fluxes. Furthermore, fertilization significantly decreased the CH 4 fluxes from paddy soils in the second stage after conversion, but it failed to affect the CH 4 fluxes from orchard soils, whereas fertilizer applied to orchard and paddy increased soil N 2 O emissions by 68 and 113.9 %, respectively. Thus, cumulative CH 4 emissions from the OF were 100 % lower, and N 2 O emissions were 421 % higher than those from the PF. Although cumulative N 2 O emissions were stimulated in the newly converted orchard, the strong reduction of CH 4 led to lower global warming potentials (GWPs) as compared to the paddy. Besides, fertilization in orchard increased GWPs but decreased GWPs of paddy soils. In addition, measurement of soil moisture, temperature, dissolved carbon contents (DOCs), and ammonia (NH 4 + -N) and nitrate (NO 3 − -N) contents indicated a significant variation in soil properties and contributed to variations in soil CH 4 and N 2 O fluxes. Results of this study suggest that land use conversion from paddy to orchard would benefit for reconciling greenhouse gas mitigation and citrus orchard cultivation would be a better agricultural system in the hilly red soils in terms of greenhouse gas emission. Moreover, selected fertilizer rate applied to paddy would lead to lower GWPs of CH 4 and N 2 O. Nevertheless, more field measurements from newly converted orchard are highly needed to gain an insight into national and global accounting of CH 4 and N 2 O emissions.

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Section: Introductioncontrasting

confidence: 74%

Section: Introductioncontrasting

confidence: 74%

Effects of land use conversion and fertilization on CH4 and N2O fluxes from typical hilly red soil

Liu

et al. 2016

Environ Sci Pollut Res

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“…Thus, fluctuations in redox or water table depth play a fundamental role in directing the flow of C among different anaerobic pathways (Teh et al, 2008;von Fischer and Hedin, 2007), and shifting the balance between production and consumption of CH 4 (Teh et al, 2005;von Fischer and Hedin, 2002). Moreover, water table or soil moisture fluctuations are also thought to profoundly influence CH 4 transport dynamics throughout the soil profile, changing the relative partitioning of CH 4 among different transport pathways such as diffusion, ebullition, and plant-facilitated transport (Whalen, 2005;Jungkunst and Fiedler, 2007).…”

Section: Introductionmentioning

confidence: 99%

Seasonal variability in methane and nitrous oxide fluxes from tropical peatlands in the western Amazon basin

et al. 2017

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Abstract. The Amazon plays a critical role in global atmospheric budgets of methane (CH 4 ) and nitrous oxide (N 2 O). However, while we have a relatively good understanding of the continental-scale flux of these greenhouse gases (GHGs), one of the key gaps in knowledge is the specific contribution of peatland ecosystems to the regional budgets of these GHGs. Here we report CH 4 and N 2 O fluxes from lowland tropical peatlands in the Pastaza-Marañón foreland basin (PMFB) in Peru, one of the largest peatland complexes in the Amazon basin. The goal of this research was to quantify the range and magnitude of CH 4 and N 2 O fluxes from this region, assess seasonal trends in trace gas exchange, and determine the role of different environmental variables in driving GHG flux. Trace gas fluxes were determined from the most numerically dominant peatland vegetation types in the region: forested vegetation, forested (short pole) vegetation, Mauritia flexuosadominated palm swamp, and mixed palm swamp. Data were collected in both wet and dry seasons over the course of four field campaigns from 2012 to 2014. Diffusive CH 4 emissions averaged 36.05 ± 3.09 mg CH 4 -C m −2 day −1 across the entire dataset, with diffusive CH 4 flux varying significantly among vegetation types and between seasons. Net ebullition of CH 4 averaged 973.3 ± 161.4 mg CH 4 -C m −2 day −1 and did not vary significantly among vegetation types or between seasons. Diffusive CH 4 flux was greatest for mixed palm swamp (52.0 ± 16.0 mg CH 4 -C m −2 day −1 ), followed by M. flexuosa palm swamp (36.7 ± 3.9 mg CH 4 -C m −2 day −1 ), forested (short pole) vegetation (31.6 ± 6.6 mg CH 4 -C m −2 day −1 ), and forested vegetation (29.8 ± 10.0 mg CH 4 -C m −2 day −1 ). Diffusive CH 4 flux also showed marked seasonality, with divergent seasonal patterns among ecosystems. Forested vegetation and mixed palm swamp showed significantly higher dry season (47.2 ± 5.4 mg CH 4 -C m −2 day −1 and 85.5 ± 26.4 mg CH 4 -C m −2 day −1 , respectively) compared to wet season emissions (6.8 ± 1.0 mg CH 4 -C m −2 day −1 and 5.2 ± 2.7 mg CH 4 -C m −2 day −1 , respectively). In contrast, forested (short pole) vegetation and M. flexuosa palm swamp showed the opposite trend, with dry season flux of 9.6 ± 2.6 and 25.5 ± 2.9 mg CH 4 -C m −2 day −1 , respectively, versus wet season flux of 103.4 ± 13.6 and 53.4 ± 9.8 mg CH 4 -C m −2 day −1 , respectively. These divergent seasonal trends may be linked to very high water tables (> 1 m) in forested vegetation and mixed palm swamp during the wet season, which may have constrained CH 4 transport across the soil-atmosphere interface. Diffusive N 2 O flux was very low (0.70 ± 0.34 µg N 2 O-N m −2 day −1 ) and did not vary significantly among ecosystems or between seasons. We conclude that peatlands in the PMFB are large and regionally significant sources of atmospheric CH 4 that need to be better accounted for in regional emissions inventories. In contrast, N 2 O flux was negligible, suggesting that this region does not make a significant contribut...

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“…Some studies report positive effects of both temperature and pluvial precipitation (Jiang et al, 2009), others only of precipitation but not of temperature (Inubushi et al, 2003;Furukawa et al, 2005) In paddy rice fields, emissions reached 489 kg ha -1 yr -1 CH 4 in a Histosol in Indonesia and 586 kg ha -1 yr -1 CH 4 in a Planosol (Sousa, 2013) and 623 kg ha -1 yr -1 CH 4 in a Gleysol, the latter two in Rio Grande do Sul, Brazil (Zschornack, 2011). These values indicate that methane emission is much higher from paddy rice soils than from the natural Histosol in this study.…”

Section: Results and Discussion Ch 4 Fluxes In Natural Histosolmentioning

confidence: 99%

Methane fluxes from waterlogged and drained Histosols of highland areas

Rachwal

Zanatta

Dieckow

et al. 2014

Rev. Bras. Ciênc. Solo

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SUMMARYSoil can be either source or sink of methane (CH 4 ), depending on the balance between methanogenesis and methanotrophy, which are determined by pedological, climatic and management factors. The objective of this study was to assess the impact of drainage of a highland Haplic Histosol on CH 4 fluxes. Field research was carried out in Ponta Grossa (Paraná, Brazil) based on the measurement of CH 4 fluxes by the static chamber method in natural and drained Histosol, over one year (17 sampling events). The natural Histosol showed net CH 4 eflux, with rates varying from 238 µg m -2 h -1 CH 4 , in cool/cold periods, to 2,850 µg m -2 h -1 CH 4 , in warm/hot periods, resulting a cumulative emission of 116 kg ha -1 yr -1 CH 4 . In the opposite, the drained Histosol showed net influx of CH 4 (-39 to -146 µg m -2 h -1 ), which resulted in a net consumption of 9 kg ha -1 yr -1 CH 4 . The main driving factors of CH 4 consumption in the drained soil were the lowering of the water-table (on average -57 cm, vs -7 cm in natural soil) and the lower water content in the 0-10 cm layer (average of 5.5 kg kg -1 , vs 9.9 kg kg -1 in natural soil). Although waterlogged Histosols of highland areas are regarded as CH 4 sources, they fulfill fundamental functions in the ecosystem, such as the accumulation of organic carbon (581 Mg ha -1 C to a depth of 1 m) and water (8.6 million L ha -1 = 860 mm to a depth of 1 m). For this reason, these soils must not be drained as an alternative to mitigate CH 4 emission, but effectively preserved.Index terms: greenhouse gas, water sources, water-table, gravimetric moisture, air temperature, rainfall.(1) Part of the thesis submitted by the first author to obtain a doctorate in Forestry Science, sub-area Nature Conservation. RESUMO: FLUXOS DE METANO EM ORGANOSSOLO NATURAL E APÓS DRENAGEMO solo pode atuar como fonte ou sumidouro de metano (CH 4 ), dependendo do balanço entre metanogênese e metanotrofia, definido por fatores pedológicos, climáticos e de manejo. O objetivo deste estudo foi avaliar as implicações da drenagem do Organossolo Háplico hêmico, típico em campo hidrófilo de altitude sobre os fluxos de CH 4 . A pesquisa de campo foi conduzida no município de Ponta Grossa, PR, e envolveu avaliações de fluxos de CH 4 pelo método da câmara estática em Organossolo natural e Organossolo drenado, por um período de um ano (17 coletas). No Organossolo natural, ocorreu efluxo líquido de CH 4 , com taxas variando entre 238 µg m -2 h -1 de CH 4 , em épocas mais frias, e 2.850 µg m -2 h -1 de CH 4 , em épocas mais quentes, totalizando emissão acumulada de 116 kg ha -1 ano -1 de CH 4 . Na área drenada, ocorreu influxo líquido (-39 a -146 µg m -2 h -1 de CH 4 ), que totalizou em consumo de 9 kg ha -1 ano -1 de CH 4 . O rebaixamento do nível freático (em média -57 cm, contra -7 cm no solo natural) e a menor umidade gravimétrica na camada de 0-10 cm (média de 5,5 kg kg -1 , contra 9,9 kg kg -1 do solo natural) foram os principais fatores determinantes do consumo de CH 4, na área drenada. Apesar de os Organ...

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Seasonal changes of CO2, CH4 and N2O fluxes in relation to land-use change in tropical peatlands located in coastal area of South Kalimantan

Cited by 231 publications

References 9 publications

Effects of land use conversion and fertilization on CH4 and N2O fluxes from typical hilly red soil

Effects of land use conversion and fertilization on CH4 and N2O fluxes from typical hilly red soil

Seasonal variability in methane and nitrous oxide fluxes from tropical peatlands in the western Amazon basin

Methane fluxes from waterlogged and drained Histosols of highland areas

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