Sources of 137Cs fluvial export from a forest catchment evaluated by stable carbon and nitrogen isotopic characterization of organic matter

Muto, Kotomi; Atarashi-Andoh, Mariko; Koarashi, Jun; Takeuchi, Erina; Nishimura, Syusaku; Tsuduki, Katsunori; Matsunaga, Takeshi

doi:10.1007/s10967-017-5350-7

Cited by 12 publications

(2 citation statements)

References 25 publications

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“…The WHC was determined from the difference in soil weight before and after water saturation. Soil total C and N contents, as well as their δ 13 C and δ 15 N values, were measured for well-grinded soil samples by using an isotope ratio mass spectrometer (IsoPrime 100, Elementar, Manchester, UK) equipped with an elemental analyzer (vario PYRO cube, Elementar) (Muto et al 2017). The phosphate absorption coefficient was determined by placing soils in 13.44 g P 2 O 5 L −1 phosphate ammonium solution for 24 h (Nanzyo 1997).…”

Section: Analysis Of Soil Propertymentioning

confidence: 99%

Effect of dry-wet cycles on carbon dioxide release from two different volcanic ash soils in a Japanese temperate forest

Nagano

Atarashi-Andoh

Koarashi

2019

Soil Science and Plant Nutrition

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In the present study, two volcanic ash soils (soil A and B) from a temperate broad-leaved forest in eastern Japan were aerobically incubated under repeated dry-wet cycles and continuously constant moisture conditions. The primary aims were to quantify the potential for enhancement of carbon dioxide (CO 2 ) release owing to increased water fluctuation and to examine differences in the responses of volcanic ash soils with different physicochemical properties. Soil B, rather than soil A, was a typical Andosol. During incubation at 20°C for 120 days with five dry-wet cycles, the CO 2 release rate was measured periodically. Abundance of the stable carbon isotope in CO 2 (δ 13 C-CO 2 ) was measured to capture changes in the origin of decomposed soil organic matter (SOM) owing to the dry-wet cycles. The CO 2 release rate under the dry-wet cycles was up to 49% higher than the values predicted from a parabolic relationship between CO 2 release and water content during incubation under the continuously constant moisture condition. The magnitude of CO 2 release enhancement was 2.7-fold higher in soil B relative to that in soil A. The δ 13 C-CO 2 value in the dry-wet cycles was enriched by 0.3-2.3‰ compared to that during incubation under the continuously constant moisture conditions, suggesting that the decomposition of well-metabolized and/or old SOM was enhanced by the dry-wet cycles. Thus, the present study suggests that Andosols, which have been believed to have a strong SOM stabilization ability, are vulnerable to dry-wet cycles. Then, increased water fluctuation in a future warmer world would have significant potential to stimulate CO 2 release from soils.

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Section: Analysis Of Soil Propertymentioning

confidence: 99%

Effect of dry-wet cycles on carbon dioxide release from two different volcanic ash soils in a Japanese temperate forest

Nagano

Atarashi-Andoh

Koarashi

2019

Soil Science and Plant Nutrition

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“…Researchers in Fukushima have reported that dissolved 137 Cs concentrations in river water under baseflow conditions have a seasonal variation correlated with the temperature (high in summer and low in winter) (Muto et al., 2017; Nakanishi & Sakuma, 2019; Tsuji et al., 2016). Moreover, dissolved 137 Cs concentrations in river water sampled in the same season are higher under stormflow conditions than baseflow conditions (Iwagami et al., 2017; Shinomiya et al., 2014; Tsuji et al., 2016; Yoshikawa et al., 2014).…”

Section: Introductionmentioning

confidence: 99%

Watershed‐Geochemical Model to Simulate Dissolved and Particulate ¹³⁷Cs Discharge From a Forested Catchment

Sakuma

Hayashi

Yoshimura

et al. 2022

Water Resources Research

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The Fukushima Daiichi Nuclear Power Plant (FDNPP) accident occurred owing to the earthquake and tsunami on 11 March 2011, and caused environmental radioisotope pollution in terrestrial areas (Ministry of Education, Culture, Sports, Science and Technology, 2011). Cesium-137 ( 137 Cs) is a critical radioisotope remaining from the fallout owing to its high activity, long half-life (30.1 y), and potential impacts on humans and ecosystems.Approximately 70% of all land in Fukushima Prefecture is forest (Ministry of Agricultural, Forestry, and Fisheries, 2012), and 137 Cs is deposited predominantly in forest areas (Nakanishi et al., 2021). The affected forests have not been decontaminated (Ministry of the Environment, 2012). Around 65%-91% of the 137 Cs in the forests was

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Factors affecting 137Cs concentrations in river water under base-flow conditions near the Fukushima Dai-ichi Nuclear Power Plant

Nakanishi

Funaki

Sakuma

2021

J Radioanal Nucl Chem

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Sources of 137Cs fluvial export from a forest catchment evaluated by stable carbon and nitrogen isotopic characterization of organic matter

Cited by 12 publications

References 25 publications

Effect of dry-wet cycles on carbon dioxide release from two different volcanic ash soils in a Japanese temperate forest

Effect of dry-wet cycles on carbon dioxide release from two different volcanic ash soils in a Japanese temperate forest

Watershed‐Geochemical Model to Simulate Dissolved and Particulate ¹³⁷Cs Discharge From a Forested Catchment

Factors affecting 137Cs concentrations in river water under base-flow conditions near the Fukushima Dai-ichi Nuclear Power Plant

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Sources of 137Cs fluvial export from a forest catchment evaluated by stable carbon and nitrogen isotopic characterization of organic matter

Cited by 12 publications

References 25 publications

Effect of dry-wet cycles on carbon dioxide release from two different volcanic ash soils in a Japanese temperate forest

Effect of dry-wet cycles on carbon dioxide release from two different volcanic ash soils in a Japanese temperate forest

Watershed‐Geochemical Model to Simulate Dissolved and Particulate 137Cs Discharge From a Forested Catchment

Factors affecting 137Cs concentrations in river water under base-flow conditions near the Fukushima Dai-ichi Nuclear Power Plant

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Product

Resources

About

Watershed‐Geochemical Model to Simulate Dissolved and Particulate ¹³⁷Cs Discharge From a Forested Catchment