Multiple timescale variations and controls of soil respiration in a tropical dry dipterocarp forest, western Thailand

Hanpattanakit, Phongthep; Leclerc, Monique Y.; McMillan, Andrew M. S.; Limtong, Pitayakorn; Maeght, Jean‐Luc; Panuthai, Samreong; Inubushi, Kazuyuki; Chidthaisong, Amnat

doi:10.1007/s11104-015-2386-8

Cited by 32 publications

(34 citation statements)

References 32 publications

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“…At this site, the soil was acidic (pH 5), with soil bulk density and soil organic carbon contents of 1.35 g cm −3 and 0.4%, respectively. The soil type was loamy sand with a profile depth of about 3 m, below which was a hard-laterite layer [17]. The average temperature and precipitation during the study period (2009-2011) were 27 • C, and 1042 mm, respectively.…”

Section: Site Descriptionmentioning

confidence: 99%

“…∆Ts is the soil temperature change over the output time interval (t, in this case ∆Ts = 30 min); Cs is the heat capacity of moist soil and d is the energy stored in the layer above the heat flux plates (8 cm depth); θv is the soil water content on a volume basis (m 3 m −3 ); Cd is the specific heat of dry soil (840 J kg −1 K −1 ); Cw is the specific heat of water (4185.5 J kg −1 K −1 ); ρw is the density of water (1000 kg m −3 ); and ρb is the bulk density of soil as reported in a previous study (1.35 g cm −3 , [17]) for 0-10 cm depths.…”

Section: Instrumentation and Flux Measurementsmentioning

confidence: 99%

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Variations of Energy Fluxes and Ecosystem Evapotranspiration in a Young Secondary Dry Dipterocarp Forest in Western Thailand

2017

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Deforestation, followed by abandonment and forest regeneration, has become one of the dominant types of land cover changes in the tropics. This study applied the eddy covariance (EC) technique to quantify the energy budget and evapotranspiration in a regenerated secondary dry dipterocarp forest in Western Thailand. The mean annual net radiation was 126.69, 129.61, and 125.65 W m −2 day −1 in 2009, 2010, and 2011, respectively. On average, fluxes of this energy were disaggregated into latent heat (61%), sensible heat (27%), and soil heat flux (1%). While the number of energy exchanges was not significantly different between these years, there were distinct seasonal patterns within a year. In the wet season, more than 79% of energy fluxes were in the form of latent heat, while during the dry season, this was in the form of sensible heat. The energy closure in this forest ecosystem was 86% and 85% in 2010 and 2011, respectively, and varied between 84-87% in the dry season and 83-84% in the wet season. The seasonality of these energy fluxes and energy closure can be explained by rainfall, soil moisture, and water vapor deficit. The rates of evapotranspiration also significantly varied between the wet (average 6.40 mm day −1 ) and dry seasons (3.26 mm day −1 ).

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Section: Site Descriptionmentioning

confidence: 99%

Section: Instrumentation and Flux Measurementsmentioning

confidence: 99%

Variations of Energy Fluxes and Ecosystem Evapotranspiration in a Young Secondary Dry Dipterocarp Forest in Western Thailand

2017

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“…While the above ground biomass has been repeatedly removed by villagers (for charcoal production), its roots remain intact. Thus the ratios of aboveground to belowground biomass are more than 1 [7], which is not common for tropical forest ecosystem. Simulation for such specific case by using a general forest DNDC model may not suitable.…”

Section: Dndc Simulation Resultsmentioning

confidence: 99%

“…Datasets on soil respiration with necessary input parameters was obtained from the previous field measurement as reported by Hanpatanakit et al [7]. Soil respiration was continuously measured by a closedautomated chamber for four years during February 2008 -December, 2011.…”

Section: Soil Respiration Dataset and Measurementsmentioning

confidence: 99%

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Simulating CO2 Emissions from Tropical Forest Soils by Denitrification-Nitrification Decomposition (DNDC) Model

2018

CABES-2018 April 17-18, 2018 Kyoto (Japan)

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Different responses of soil respiration to environmental factors across forest stages in a Southeast Asian forest

Rodtassana

Unawong

Yaemphum

et al. 2021

Ecology and Evolution

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Soil respiration (SR) in forests contributes significant carbon dioxide emissions from terrestrial ecosystems and is highly sensitive to environmental changes, including soil temperature, soil moisture, microbial community, surface litter, and vegetation type. Indeed, a small change in SR may have large impacts on the global carbon balance, further influencing feedbacks to climate change. Thus, detailed characterization of SR responses to changes in environmental conditions is needed to accurately estimate carbon dioxide emissions from forest ecosystems. However, data for such analyses are still limited, especially in tropical forests of Southeast Asia where various stages of forest succession exist due to previous land-use changes. In this study, we measured SR and some environmental factors including soil temperature (ST), soil moisture (SM), and organic matter content (OM) in three successional tropical forests in both wet and dry periods. We also analyzed the relationships between SR and these environmental variables. Results showed that SR was higher in the wet period and in older forests. Although no response of SR to ST was found in younger forest stages, SR of the old-growth forest significantly responded to ST, plausibly due to the nonuniform forest structure, including gaps, that resulted in a wide range of ST.

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Multiple timescale variations and controls of soil respiration in a tropical dry dipterocarp forest, western Thailand

Cited by 32 publications

References 32 publications

Variations of Energy Fluxes and Ecosystem Evapotranspiration in a Young Secondary Dry Dipterocarp Forest in Western Thailand

Variations of Energy Fluxes and Ecosystem Evapotranspiration in a Young Secondary Dry Dipterocarp Forest in Western Thailand

Simulating CO2 Emissions from Tropical Forest Soils by Denitrification-Nitrification Decomposition (DNDC) Model

Different responses of soil respiration to environmental factors across forest stages in a Southeast Asian forest

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