Catastrophic reduction of sea ice in the Arctic Ocean – its impact on the marine organisms and ecosystems in the polar region
Catastrophic reduction of sea ice in the Arctic Ocean – its impact on the marine organisms and ecosystems in the polar region
Editor(s): T. Hirawake, Y. Watanuki, J. Grebmeier, M. Chierici, M. Yamamoto-Kawai, M. Sampei, and K. Suzuki
The topical target areas are located in the Arctic Ocean and its marginal seas, including the Bering Sea. The marine ecosystem surrounding the Arctic Ocean is complicated, and it is difficult to predict the future because "disadvantage" phenomena such as ocean acidification and "advantage" phenomena such as improving light conditions for marine organisms, respectively, are simultaneously progressing. Investigations such as observations by research vessels and satellites, culture and breeding of plankton, and marine ecosystem models are necessary to understand not only the current status but also prediction of changes in Arctic environments and the impact on the ecosystem. In this special volume, the latest research findings are reported as follows: (1) description of recent environmental changes, physical and chemical properties associated with Arctic climate change; (2) temporal changes in primary production, secondary production and lower trophic level ecosystems; (3) recent changes in behavior and distribution of higher trophic level organisms including marine mammals; (4) the physiological response of marine phyto- and zooplankton having carbonate tests on warming or freshening associated with sea-ice melting; and (5) development of a new model for marine ecosystems in the Arctic Ocean, to reproduce the primary production by using the model and to understand the response of marine ecosystems on the catastrophic environmental changes caused by rapid sea-ice reduction. These reports can be valuable for not only for understanding the current environmental changes in the Arctic Ocean but also for obtaining new predictions of marine ecosystems of both low and high trophic level organisms including fish resources in this area. The prediction of fish resources in the Arctic Ocean would contribute to the planning of not only Japanese but also international policy for fisheries. This special issue is open to all submissions within the scope of this special issue.

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13 Jan 2017
Seasonal distribution of short-tailed shearwaters and their prey in the Bering and Chukchi seas
Bungo Nishizawa, Kohei Matsuno, Elizabeth A. Labunski, Kathy J. Kuletz, Atsushi Yamaguchi, and Yutaka Watanuki
Biogeosciences, 14, 203–214,,, 2017
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12 Aug 2016
Distribution of Arctic and Pacific copepods and their habitat in the northern Bering and Chukchi seas
Hiroko Sasaki, Kohei Matsuno, Amane Fujiwara, Misaki Onuka, Atsushi Yamaguchi, Hiromichi Ueno, Yutaka Watanuki, and Takashi Kikuchi
Biogeosciences, 13, 4555–4567,,, 2016
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10 May 2016
Change in coccolith size and morphology due to response to temperature and salinity in coccolithophore Emiliania huxleyi (Haptophyta) isolated from the Bering and Chukchi seas
Kazuko Saruwatari, Manami Satoh, Naomi Harada, Iwane Suzuki, and Yoshihiro Shiraiwa
Biogeosciences, 13, 2743–2755,,, 2016
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29 Apr 2016
Water mass characteristics and their temporal changes in a biological hotspot in the southern Chukchi Sea
Shigeto Nishino, Takashi Kikuchi, Amane Fujiwara, Toru Hirawake, and Michio Aoyama
Biogeosciences, 13, 2563–2578,,, 2016
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29 Apr 2016
Foraging segregation of two congeneric diving seabird species breeding on St. George Island, Bering Sea
Nobuo Kokubun, Takashi Yamamoto, Nobuhiko Sato, Yutaka Watanuki, Alexis Will, Alexander S. Kitaysky, and Akinori Takahashi
Biogeosciences, 13, 2579–2591,,, 2016
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26 Apr 2016
Differential responses of seabirds to environmental variability over 2 years in the continental shelf and oceanic habitats of southeastern Bering Sea
Takashi Yamamoto, Nobuo Kokubun, Dale M. Kikuchi, Nobuhiko Sato, Akinori Takahashi, Alexis P. Will, Alexander S. Kitaysky, and Yutaka Watanuki
Biogeosciences, 13, 2405–2414,,, 2016
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18 Feb 2016
Short-term changes in a microplankton community in the Chukchi Sea during autumn: consequences of a strong wind event
Naoya Yokoi, Kohei Matsuno, Mutsuo Ichinomiya, Atsushi Yamaguchi, Shigeto Nishino, Jonaotaro Onodera, Jun Inoue, and Takashi Kikuchi
Biogeosciences, 13, 913–923,,, 2016
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10 Feb 2016
Primary production in the Chukchi Sea with potential effects of freshwater content
M. S. Yun, T. E. Whitledge, D. Stockwell, S. H. Son, J. H. Lee, J. W. Park, D. B. Lee, J. Park, and S. H. Lee
Biogeosciences, 13, 737–749,,, 2016
15 Jan 2016
Influence of timing of sea ice retreat on phytoplankton size during marginal ice zone bloom period on the Chukchi and Bering shelves
A. Fujiwara, T. Hirawake, K. Suzuki, L. Eisner, I. Imai, S. Nishino, T. Kikuchi, and S.-I. Saitoh
Biogeosciences, 13, 115–131,,, 2016
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15 Jan 2016
Concentration maxima of volatile organic iodine compounds in the bottom layer water and the cold, dense water over the Chukchi Sea in the western Arctic Ocean: a possibility of production related to the degradation of organic matter
A. Ooki, S. Kawasaki, K. Kuma, S. Nishino, and T. Kikuchi
Biogeosciences, 13, 133–145,,, 2016
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28 Oct 2015
Wind-driven interannual variability of sea ice algal production in the western Arctic Chukchi Borderland
E. Watanabe, J. Onodera, N. Harada, M. N. Aita, A. Ishida, and M. J. Kishi
Biogeosciences, 12, 6147–6168,,, 2015
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03 Jul 2015
Short-term changes in the mesozooplankton community and copepod gut pigment in the Chukchi Sea in autumn: reflections of a strong wind event
K. Matsuno, A. Yamaguchi, S. Nishino, J. Inoue, and T. Kikuchi
Biogeosciences, 12, 4005–4015,,, 2015
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27 Mar 2015
Flux variations and vertical distributions of siliceous Rhizaria (Radiolaria and Phaeodaria) in the western Arctic Ocean: indices of environmental changes
T. Ikenoue, K. R. Bjørklund, S. B. Kruglikova, J. Onodera, K. Kimoto, and N. Harada
Biogeosciences, 12, 2019–2046,,, 2015
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