71
H.-J. Ceccaldi et al. (eds.), Marine Productivity: Perturbations and Resilience of Socio-ecosystems,
DOI 10.1007/978-3-319-13878-7_8, © Springer International Publishing Switzerland 2015
Abstract
As a result of the earthquake and tsunami of March 2011, a large quantity
of radioactive material was emitted into the sea from the Fukushima
Daiichi Nuclear Power Plant (FNPP). Seawater, sediments, and many
marine organisms with high radiation levels have been reported from
coastal areas in Fukushima Prefecture. Currently, fi shing in Fukushima
Prefecture has been banned. This projected study will examine the following issues: (1) diffusion of radioactive material via the food chain,
(2) diffusion via migration/movement of various organisms, and, as a
long-term project, (3) the biological half-life of selected radionuclide
cesium within the fi sh body. Sampling of marine organisms was carried
out between November 2011 and May 2013 by scuba diving, gillnetting,
and seine netting. A rocky shore and a sandy beach at Yotsukura (35 km
south of FNPP; depth, 0.5–1 m), Ena (50 km south of FNPP; depth,
5–6 m), and Souma (50 km north of FNPP; depth, 3–7 m) were selected as
sampling locations. Sampled species included 15 seaweeds, 25 invertebrates, and 43 fi sh species. Concentrations of radioactive cesium (
134+137
Cs)
were measured using a germanium semiconductor detector. In addition, an
H. Arakawa (*) • T. Tokai • Y. Miyamoto
S. Akiyama • K. Uchida • A. Matsumoto
M. Narita • H. Myouse
Tokyo University of Marine Science and Technology ,
5-7, Konan-4 , Minato , Tokyo 108-8477 , Japan
e-mail: arakawa@kaiyodai.ac.jp
Distribution of Radioactive
Material in Marine Ecosystems Off
the Fukushima Coast: Radioactive
Cesium Levels in Fukushima
Marine Organisms
Hisayuki Arakawa , Tadashi Tokai ,
Yoshinori Miyamoto , Seiji Akiyama , Keiichi Uchida ,
Akira Matsumoto , Miho Narita , Hiroshi Myouse ,
Yukio Agatsuma , Satoshi Katayama , Masaru Aoki ,
Ikuo Matsumoto , and Naoto Hirakawa
Y. Agatsuma • S. Katayama • M. Aoki
Tohoku University , 1-1, Amamiya-machi,
Tsutsumidori , Aoba-ku, Sendai 981-8555 , Japan
I. Matsumoto • N. Hirakawa
Fukushima Prefectural Fisheries Experimental
Station , 13-2, Shimokajiro , Onahama, Iwaki ,
Fukushima 970-0316 , Japan
H.-J. Ceccaldi et al. (eds.), Marine Productivity: Perturbations and Resilience of Socio-ecosystems,
DOI 10.1007/978-3-319-13878-7_8, © Springer International Publishing Switzerland 2015
Abstract
As a result of the earthquake and tsunami of March 2011, a large quantity
of radioactive material was emitted into the sea from the Fukushima
Daiichi Nuclear Power Plant (FNPP). Seawater, sediments, and many
marine organisms with high radiation levels have been reported from
coastal areas in Fukushima Prefecture. Currently, fi shing in Fukushima
Prefecture has been banned. This projected study will examine the following issues: (1) diffusion of radioactive material via the food chain,
(2) diffusion via migration/movement of various organisms, and, as a
long-term project, (3) the biological half-life of selected radionuclide
cesium within the fi sh body. Sampling of marine organisms was carried
out between November 2011 and May 2013 by scuba diving, gillnetting,
and seine netting. A rocky shore and a sandy beach at Yotsukura (35 km
south of FNPP; depth, 0.5–1 m), Ena (50 km south of FNPP; depth,
5–6 m), and Souma (50 km north of FNPP; depth, 3–7 m) were selected as
sampling locations. Sampled species included 15 seaweeds, 25 invertebrates, and 43 fi sh species. Concentrations of radioactive cesium (
134+137
Cs)
were measured using a germanium semiconductor detector. In addition, an
H. Arakawa (*) • T. Tokai • Y. Miyamoto
S. Akiyama • K. Uchida • A. Matsumoto
M. Narita • H. Myouse
Tokyo University of Marine Science and Technology ,
5-7, Konan-4 , Minato , Tokyo 108-8477 , Japan
e-mail: arakawa@kaiyodai.ac.jp
Distribution of Radioactive
Material in Marine Ecosystems Off
the Fukushima Coast: Radioactive
Cesium Levels in Fukushima
Marine Organisms
Hisayuki Arakawa , Tadashi Tokai ,
Yoshinori Miyamoto , Seiji Akiyama , Keiichi Uchida ,
Akira Matsumoto , Miho Narita , Hiroshi Myouse ,
Yukio Agatsuma , Satoshi Katayama , Masaru Aoki ,
Ikuo Matsumoto , and Naoto Hirakawa
Y. Agatsuma • S. Katayama • M. Aoki
Tohoku University , 1-1, Amamiya-machi,
Tsutsumidori , Aoba-ku, Sendai 981-8555 , Japan
I. Matsumoto • N. Hirakawa
Fukushima Prefectural Fisheries Experimental
Station , 13-2, Shimokajiro , Onahama, Iwaki ,
Fukushima 970-0316 , Japan