Radionuclide Analysis on Bamboos following the Fukushima Nuclear Accident

Higaki, Takumi; Higaki, Shogo; Hirota, Mitsutomo; Akita, Kae; Hasezawa, Seiichiro

doi:10.1371/journal.pone.0034766

Cited by 12 publications

(10 citation statements)

References 10 publications

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“…Numerical simulation showed that the radionuclides derived from FNPP1 circulated around the Northern Hemisphere (Stohl et al, 2012), and the fission products were actually detected in aerosol, gaseous, rain and snow samples collected in North America (e.g., Bowyer et al, 2011;Leon et al, 2011), Europe (e.g., Bossew et al, 2012Masson et al, 2011), central Russia (Bolsunovsky & Dementyev, 2011;Melgunov et al, 2012) and Taiwan (Huh et al, 2012). The radionuclides emitted from FNPP1 were also detected from terrestrial biota not only in Japan (e.g., Hashimoto et al, 2012;Higaki et al, 2012;Tagami et al, 2012) but also in North America (Thakur et al, 2012) and Europe (Cosma et al, 2011;Pittauerova et al, 2011). As compared with the terrestrial research, however, studies on the influences of the FNPP1 accident to marine biota have been scarce.…”

Section: Introductionmentioning

confidence: 98%

Horizontal distribution of Fukushima-derived radiocesium in zooplankton in the northwestern Pacific Ocean

Kitamura¹,

Kumamoto²,

Kawakami³

et al. 2013

Preprint

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The magnitude of the 9.0 Tohoku earthquake and the ensuing tsunami on 11 March 2011, inflicted heavy damage on the Fukushima Dai-ichi nuclear power plant (FNPP1). Fission products were emitted, falling over a broad range in the northern hemisphere, and water contaminated with radionuclides leaked into the ocean. In this study, we described the horizontal distribution of the Fukushima-derived radiocesium in zooplankton and in seawater in the western North Pacific Ocean (500–2100 km from the FNPP1) 10 months after the accident. ¹³⁴Cs and ¹³⁷Cs were detected in zooplankton and seawater from all the stations. Because of its short half-lives, ¹³⁴Cs detected in our samples could only be derived from the FNPP1 accident. The highest ¹³⁷Cs activity in zooplankton was same order of magnitude as that one month after the accident, and average activity was one or two orders of magnitude higher than ¹³⁷Cs activities observed before the accident around Japan. Horizontally, the radiocesium activity concentrations in zooplankton were high at around 25° N while those in surface seawater were high at around the transition area between the Kuroshio and the Oyashio Currents (36–40° N). We observed subsurface radiocesium maxima in density range of the North Pacific Subtropical Mode Water and occurrence of many diel vertical migratory zooplanktons. These suggested that the high activity concentrations in the subtropical zooplankton at around 25° N were connected to the subsurface radiocesium and active vertical migration of zooplankton. However, the high activity concentrations of radiocesium in subsurface seawater did not necessarily follow the higher radiocesium activity in zooplankton. Biological characteristics of zooplankton community possibly influenced how large was contamination of radiocesium in the community but it is still unknown what kind of biological factors were important

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Section: Introductionmentioning

confidence: 98%

Horizontal distribution of Fukushima-derived radiocesium in zooplankton in the northwestern Pacific Ocean

Kitamura¹,

Kumamoto²,

Kawakami³

et al. 2013

Preprint

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“…Because the underground stem-root system of bamboo mainly exists in the soil layers, we cannot eliminate the possibility of root absorption. However, we previously reported higher radiocesium activities in mature leaves than in young ones in bamboo plants 25–195 km from the Fukushima Daiichi nuclear plant 4 months after the nuclear accident [7] , suggesting direct deposition of radiocesium fallout onto mature leaves. In addition, after the Chernobyl nuclear accident, studies of thyme plants ( Origanum vulgare L.) in Turkey suggested the importance of foliar absorption of radiocesium rather than root uptake [19] .…”

Section: Discussionmentioning

confidence: 76%

“…The Fukushima-derived radiocesium ( 134 Cs and 137 Cs) largely fell on land in the Tohoku and Kanto regions of Japan [2] , [3] and in the Northwest Pacific Ocean [4] , [5] . Radiocesium contamination in agricultural and woody plants has been reported [6] , [7] , [8] . Radiocesium contamination of food crops has become of prime interest, especially for residents in the affected areas.…”

Section: Introductionmentioning

confidence: 99%

Radiocesium Distribution in Bamboo Shoots after the Fukushima Nuclear Accident

Higaki

Hirota

et al. 2014

PLoS ONE

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The distribution of radiocesium was examined in bamboo shoots, Phyllostachys pubescens, collected from 10 sites located some 41 to 1140 km from the Fukushima Daiichi nuclear power plant, Japan, in the Spring of 2012, 1 year after the Fukushima nuclear accident. Maximum activity concentrations for radiocesium 134Cs and 137Cs in the edible bamboo shoot parts, 41 km away from the Fukushima Daiichi plant, were in excess of 15.3 and 21.8 kBq/kg (dry weight basis; 1.34 and 1.92 kBq/kg, fresh weight), respectively. In the radiocesium-contaminated samples, the radiocesium activities were higher in the inner tip parts, including the upper edible parts and the apical culm sheath, than in the hardened culm sheath and underground basal parts. The radiocesium/potassium ratios also tended to be higher in the inner tip parts. The radiocesium activities increased with bamboo shoot length in another bamboo species, Phyllostachys bambusoides, suggesting that radiocesium accumulated in the inner tip parts during growth of the shoots.

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“…Investigation of radionuclide was conducted on bamboo sampled from six sites within a 25-to 980-km radius of the Fukushima plant in July to August 2011. 4 Strikingly high concentrations of radiocesium-134 and -137 activity were detected in mature leaves from Fukushima city (65 km from the Fukushima plant), in excess of 71 and 79 kBq/kg of dry weight (DW). In Kashiwa city (195 km from the plant), sample concentrations were in excess of 3.4 and 4.3 kBq/kg DW.…”

Section: Depopulation With Rapid Aging In Minamisoma City After the Fmentioning

confidence: 99%

Depopulation with Rapid Aging in Minamisoma City After the Fukushima Daiichi Nuclear Power Plant Accident

Ishikawa

Kanazawa²,

Morimoto

et al. 2012

J American Geriatrics Society

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Radionuclide Analysis on Bamboos following the Fukushima Nuclear Accident

Cited by 12 publications

References 10 publications

Horizontal distribution of Fukushima-derived radiocesium in zooplankton in the northwestern Pacific Ocean

Horizontal distribution of Fukushima-derived radiocesium in zooplankton in the northwestern Pacific Ocean

Radiocesium Distribution in Bamboo Shoots after the Fukushima Nuclear Accident

Depopulation with Rapid Aging in Minamisoma City After the Fukushima Daiichi Nuclear Power Plant Accident

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