Spatial and temporal variation in soil respiration in a Southeast Asian tropical rainforest

Kosugi, Yukio; Mitani, Tomonori; Itoh, Masatoshi; Noguchi, Shoji; Tani, Makoto; Matsuo, Naoko; Takanashi, Satoru; Ohkubo, S.; Nik, Abdul Rahim

doi:10.1016/j.agrformet.2007.06.005

Cited by 157 publications

(178 citation statements)

References 57 publications

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“…As we reviewed in the introduction, however, opposite results, whereby lower slopes had a lower soil respiration rate than upper slopes were reported in several forest ecosystems (e.g. Chambers et al 2004;Kosugi et al 2007). The discrepancy of these reports may result from the different characteristics of the study sites, such as vegetation-soil association, soil microbes, the physical and chemical properties of the soil, and soil water legumes on the slope.…”

Section: Discussion Spatial Variation In Soil Respiration Rate On Thementioning

confidence: 57%

“…Shimada et al (1998) on the lower slope and 9.9 MgC ha À1 year À1 on the upper slope in a Japanese coniferous plantation. However, no correlation (Fang et al 2009), and the opposite trend, namely lower soil respiration rates on the lower slope and at the valley bottom than the upper slope (Chambers et al 2004;Tsutsumi et al 1985;Epron et al 2006;Mitani et al 2006;Kosugi et al 2007) have been reported in several forest ecosystems. Although many reports have suggested that soil respiration varies with slope position, no general principle concerning the relationship between slope position and soil respiration has yet been established.…”

Section: Introductionmentioning

confidence: 99%

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Topographic variation in heterotrophic and autotrophic soil respiration in a tropical seasonal forest in Thailand

Takahashi

Hirai

Limtong³

et al. 2011

Soil Science and Plant Nutrition

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Soil respiration is a carbon flux that is indispensable for determining carbon balance despite variations over time and space in forest ecosystems. In Kanchanaburi, western Thailand, we measured the soil respiration rates at different slope positions-ridge (plot R), upper slope (plot U), and lower slope (plot L)-on a hill in a seasonal tropical forest [mixed deciduous forest (MDF)] to determine the seasonal and spatial variations in soil respiration on the slope. The heterotrophic (organic layer and soil) and autotrophic (root) respiration was differentiated by trenching. Soil respiration rates showed clear seasonal patterns: high and low rates in rainy and dry seasons respectively, at all plots, and tended to decrease up the slope. Soil respiration rates responded significantly to soil water content in the 0-30 cm layer, but the response patterns differed between the lower slope (plot L) and the upper slope (plots R and U): a linear model could be applied to the lower slope but exponential quadratic models to the upper slope. The annual carbon dioxide (CO 2 ) efflux from the forest floor was also associated with the slope position and ranged from 1908 gC m À2 year À1 in plot L to 1199 gC m À2 year À1 in plot R. With ascending position from plot L to R, the contribution of autotrophic respiration increased from 19.4 to 36.6% of total soil respiration, while that of the organic layer decreased from 26.2 to 9.4%. Mineral soil contributed to 46.3 to 54.4% of the total soil respiration. Soil water content was the key factor in controlling the soil respiration rate and the contribution of the respiration sources. However, the variable responses of soil respiration to soil water content create a complex distribution of soil respiration at the watershed scale.

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Section: Discussion Spatial Variation In Soil Respiration Rate On Thementioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Topographic variation in heterotrophic and autotrophic soil respiration in a tropical seasonal forest in Thailand

Takahashi

Hirai

Limtong³

et al. 2011

Soil Science and Plant Nutrition

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“…For example, the peak value in a ponderosa pine plantation in northern California was 6.03 lmol m À2 s À1 (Xu and Qi 2001), and it was 6.5 lmol m À2 s À1 in central Oregon (Law et al 1999). In a temperate mixed hardwood forest in Massachusetts, the peak value was 6.97 lmol m À2 s À1 (Davidson et al 1998), and it was 6.5 lmol m À2 s À1 in a Southeast Asian tropical rainforest (Kosugi et al 2007). Obviously, the peak values (15.61 lmol m À2 s À1 in 2006 and 17.72 lmol m À2 s À1 in 2007) in our study were far higher than those peaks in undisturbed ecosystems, which could not be explained by temperature and moisture alone (Figs.…”

Section: Discussionmentioning

confidence: 99%

Seasonal dynamics of soil CO₂ efflux in a conventional tilled wheat field of the Loess Plateau, China

Zhang¹,

Zhou²,

Lü³

et al. 2011

Ecological Research

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An automated chamber system was employed to measure the soil CO 2 efflux (SCE) in situ for 2 years in a conventional wheat field of the Loess Plateau, China under semi-arid conditions. The annual mean SCE values were 2.44 ± 2.52 lmol m À2 s À1 in 2006 and 2.37 ± 2.33 lmol m À2 s À1 in 2007. Distinct seasonality in the SCE was observed, with significant differences occurring among four periods divided by harvesting, tillage and sowing. In the period from tillage to sowing, the mean SCE values were 2.82 and 2.69 times the annual mean values in 2006 and 2007, respectively, and SCE accounted for 39% and 48% of the annual total within 14% and 18% of the days of the years. Although there were significant exponential correlations between the SCE and soil temperature, and significant linear correlations between the SCE and soil moisture for measurements conducted in the periods before tillage and after sowing each year, the SCE from tillage to sowing was significantly beyond the correlation curves. These findings indicated that seasonal variation in the SCE in a conventional field was controlled not only by soil temperature and moisture, but also by tillage practice. The confounding effects of climate and practice on SCE should be considered when developing ways to mitigate soil carbon loss in conventional cropland in semi-arid regions.

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“…Kosugi et al (2007) demonstrated the complexity of soil respiration patterns, since spatial variability indicates CO 2 emissions are lower where the soil water content is higher; however, in terms of temporal variability, the opposite effect was found, as soil respiration was higher with increasing soil moisture. The mechanisms controlling the spatio-temporal variability of soil CO 2 efflux in water-limited ecosystems is highly complex (Leon et al, 2014).…”

Section: Introductionmentioning

confidence: 94%

Spatial and Temporal Variability of Soil CO2 Flux in Sugarcane Green Harvest Systems

Tavares

Souza

Scala

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:The sugarcane green harvest system, characterized by mechanized harvesting and the absence of crop burning, affects soil quality by increasing crop residue on the soil surface after harvest; thus, it contributes to improving the physical, chemical, and microbiological properties and influences the soil carbon content and CO 2 flux (FCO 2 ). This study aimed to evaluate the spatial and temporal variability of soil FCO 2 in sugarcane green harvest systems. The experiment was conducted in two areas of sugarcane in São Paulo, Brazil: the first had a 5-year history of sugarcane green harvest (SG-5) and the second had a longer history of 10 years (SG-10). The temporal FCO 2 were evaluated in the dry and rainy periods, and spatial variability in the dry period, and related to soil chemical and physical properties, including organic C porosity, bulk density, soil penetration resistance, mean weight diameter of soil aggregates, clay, P, S, Ca, Mg and Fe. The temporal variability indicated no differences between the dry and rainy periods in SG-10, while in SG-5 soil moisture was increased by 33 % in the rainy period. The spatial variability indicated a different pattern from the temporal one, where FCO 2 in SG-10 was correlated with soil temperature, air-filled pore space, total porosity, soil moisture, and the Ca and Mg contents; in the SG-5 area, FCO 2 was correlated with soil mean weight diameter of soil aggregates and the sulfur content.

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Spatial and temporal variation in soil respiration in a Southeast Asian tropical rainforest

Cited by 157 publications

References 57 publications

Topographic variation in heterotrophic and autotrophic soil respiration in a tropical seasonal forest in Thailand

Topographic variation in heterotrophic and autotrophic soil respiration in a tropical seasonal forest in Thailand

Seasonal dynamics of soil CO₂ efflux in a conventional tilled wheat field of the Loess Plateau, China

Spatial and Temporal Variability of Soil CO2 Flux in Sugarcane Green Harvest Systems

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Spatial and temporal variation in soil respiration in a Southeast Asian tropical rainforest

Cited by 157 publications

References 57 publications

Topographic variation in heterotrophic and autotrophic soil respiration in a tropical seasonal forest in Thailand

Topographic variation in heterotrophic and autotrophic soil respiration in a tropical seasonal forest in Thailand

Seasonal dynamics of soil CO2 efflux in a conventional tilled wheat field of the Loess Plateau, China

Spatial and Temporal Variability of Soil CO2 Flux in Sugarcane Green Harvest Systems

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Seasonal dynamics of soil CO₂ efflux in a conventional tilled wheat field of the Loess Plateau, China