CO2 emissions from tropical drained peat in Sumatra, Indonesia

Husnain, Husnain; Wigena, I Gusti Putu; Dariah, Ai; Marwanto, Setiari; Setyanto, Prihasto; Agus, Fahmuddin

doi:10.1007/s11027-014-9550-y

Cited by 58 publications

(47 citation statements)

References 26 publications

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“…Jauhiainen, Kerojoki, Silvennoinen, Limin, & Vasander, 2014;Melling, Hatano, & Goh, 2005). Higher midday fluxes were also detected in manual chamber measurements over more limited time periods (1 day-2 weeks) by Ali, Taylor, and Inubushi (2006), Husnain et al (2014), Marwanto and and Comeau et al (2016). Hirano et al (2009) found a clear midday peak in CO 2 emissions using automated chambers.…”

Section: Introductionmentioning

confidence: 68%

“…Hirano et al (2009) found a clear midday peak in CO 2 emissions using automated chambers. Higher midday fluxes were also detected in manual chamber measurements over more limited time periods (1 day-2 weeks) by Ali, Taylor, and Inubushi (2006), Husnain et al (2014), Marwanto and and Comeau et al (2016). However, Hergoualc'h et al (2017 did not detect a diurnal cycle in CO 2 flux, and Ishikura, Darung, Inoue, and Hatano (2018) measured the lowest average hourly CO 2 fluxes at midday.…”

Section: Introductionmentioning

confidence: 68%

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CO₂ emissions from an undrained tropical peatland: Interacting influences of temperature, shading and water table depth

Hoyt

Gandois

Eri³

et al. 2019

Global Change Biology

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Emission of CO2 from tropical peatlands is an important component of the global carbon budget. Over days to months, these fluxes are largely controlled by water table depth. However, the diurnal cycle is less well understood, in part, because most measurements have been collected daily at midday. We used an automated chamber system to make hourly measurements of peat surface CO2 emissions from chambers root‐cut to 30 cm. We then used these data to disentangle the relationship between temperature, water table and heterotrophic respiration (Rhet). We made two central observations. First, we found strong diurnal cycles in CO2 flux and near‐surface peat temperature (<10 cm depth), both peaking at midday. The magnitude of diurnal oscillations was strongly influenced by shading and water table depth, highlighting the limitations of relying on daytime measurements and/or a single correction factor to remove daytime bias in flux measurements. Second, we found mean daily Rhet had a strong linear relationship to the depth of the water table, and under flooded conditions, Rhet was small and constant. We used this relationship between Rhet and water table depth to estimate carbon export from both Rhet and dissolved organic carbon over the course of a year based on water table records. Rhet dominates annual carbon export, demonstrating the potential for peatland drainage to increase regional CO2 emissions. Finally, we discuss an apparent incompatibility between hourly and daily average observations of CO2 flux, water table and temperature: water table and daily average flux data suggest that CO2 is produced across the entire unsaturated peat profile, whereas temperature and hourly flux data appear to suggest that CO2 fluxes are controlled by very near surface peat. We explore how temperature‐, moisture‐ and gas transport‐related mechanisms could cause mean CO2 emissions to increase linearly with water table depth and also have a large diurnal cycle.

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Section: Introductionmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 68%

CO₂ emissions from an undrained tropical peatland: Interacting influences of temperature, shading and water table depth

Hoyt

Gandois

Eri³

et al. 2019

Global Change Biology

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“…However, since oil palm trees do not grow well on waterlogged soil due to poor anchorage and anoxic conditions, the establishment of oil palm plantation requires drainage of peat. This greatly increases the risk of high levels of organic matter decomposition, as the presence of oxygen enables the activity of aerobic microorganisms (Husnain et al 2014).…”

Section: Introductionmentioning

confidence: 99%

High heterotrophic CO2 emissions from a Malaysian oil palm plantation during dry-season

Matysek

Evers

Samuel

et al. 2017

Wetlands Ecol Manage

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Tropical peatlands are currently being rapidly cleared and drained for the establishment of oil palm plantations, which threatens their globally significant carbon sequestration capacity. Large-scale land conversion of tropical peatlands is important in the context of greenhouse gas emission factors and sustainable land management. At present, quantification of carbon dioxide losses from tropical peatlands is limited by our understanding of the relative contribution of heterotrophic and autotrophic respiration to net peat surface CO 2 emissions. In this study we separated heterotrophic and autotrophic components of peat CO 2 losses from two oil palm plantations (one established in '2000' and the other in 1978, then replanted in '2006') using chamber-based emissions sampling along a transect from the rooting to non-rooting zones on a peatland in Selangor, Peninsular Malaysia over the course of 3 months (June-August, 2014). Collar CO 2 measurements were compared with soil temperature and moisture at site and also accompanied by depth profiles assessing peat C and bulk density. The soil respiration decreased exponentially with distance from the palm trunks with the sharpest decline found for the plantation with the younger palms with overall fluxes of 1341 and 988 mg CO 2 m -2 h -1 , respectively, at the 2000 and 2006 plantations, respectively. The mean heterotrophic flux was 909 ± SE 136 and 716 ± SE 201 mg m -2 h -1 at the 2000 and 2006 plantations, respectively. Autotrophic emissions adjacent to the palm trunks were 845 ± SE 135 and 1558 ± SE 341 mg m -2 h -1 at the 2000 and 2006 plantations, respectively. Heterotrophic CO 2 flux was positively related to peat soil moisture, but not temperature. Total peat C stocks were 60 kg m -2 (down to 1 m depth) and did not vary among plantations of different ages but SOC concentrations declined significantly with depth at both plantations

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“…However, because of more intense solar radiation in the equatorial region, notable long-term differences in tropical peat surface temperature conditions can form between areas due to differing shading intensities provided by vegetation, and a shortterm diurnal temperature fluctuation in the peat surface may exist between day and night. Deforestation increases the rate of solar radiation reaching the soil surface and topsoil temperatures increase from values found under forest cover (Brady 1997, Takakai et al 2006, Jauhiainen et al 2008, Husnain et al 2014. Reported average diurnal topsoil temperatures (between March and July 2002) in several areas of differing land uses in Central Kalimantan show notable increases under reduced vegetation cover, e.g.…”

Section: Introductionmentioning

confidence: 99%

Heterotrophic respiration in drained tropical peat is greatly affected by temperature—a passive ecosystem cooling experiment

Jauhiainen

Kerojoki

Silvennoinen

et al. 2014

Environ. Res. Lett.

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CO2 emissions from tropical drained peat in Sumatra, Indonesia

Cited by 58 publications

References 26 publications

CO₂ emissions from an undrained tropical peatland: Interacting influences of temperature, shading and water table depth

CO₂ emissions from an undrained tropical peatland: Interacting influences of temperature, shading and water table depth

High heterotrophic CO2 emissions from a Malaysian oil palm plantation during dry-season

Heterotrophic respiration in drained tropical peat is greatly affected by temperature—a passive ecosystem cooling experiment

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CO2 emissions from tropical drained peat in Sumatra, Indonesia

Cited by 58 publications

References 26 publications

CO2 emissions from an undrained tropical peatland: Interacting influences of temperature, shading and water table depth

CO2 emissions from an undrained tropical peatland: Interacting influences of temperature, shading and water table depth

High heterotrophic CO2 emissions from a Malaysian oil palm plantation during dry-season

Heterotrophic respiration in drained tropical peat is greatly affected by temperature—a passive ecosystem cooling experiment

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CO₂ emissions from an undrained tropical peatland: Interacting influences of temperature, shading and water table depth

CO₂ emissions from an undrained tropical peatland: Interacting influences of temperature, shading and water table depth