研究者詳細 - 小針　統

論文 - 小針　統

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Toru Kobari, Deborah K. Steinberg, Ai Ueda, Atsushi Tsuda, Mary W. Silver and Minoru Kitamura . Impacts of ontogenetically migrating copepods on downward carbon flux in the western subarctic Pacific Ocean. . Deep-Sea Resarch II55 1648 - 1660 2008年7月査読国際共著

Toru Kobari, Masatoshi Moku, Kazutaka Takahashi . Seasonal appearance of expatriated boreal copepods in the Oyashio-Kuroshio mixed region. . ICES Journal of Marine Science65 469 - 476 2008年4月査読

河合渓, 小針統, 真鍋尚也, Leon Zann . マングローブ林とサンゴ礁が併存する島嶼沿岸域の漁業と海洋環境 - フィジー諸島共和国ビチレブ島の漁村を例に . 島嶼研究7 1 - 16 2008年3月査読国際共著

真鍋尚也, 小針統, 河合渓, Leon Zann . マングローブ林とサンゴ礁が併存するフィジー諸島共和国沿岸域の魚類相 . 島嶼研究7 17 - 26 2008年3月査読国際共著

Steinberg, Deborah K., Benjamin A. S. Van Mooy, Ken O. Buesseler, Philip W. Boyd, Toru Kobari, and David M. Karl. . Bacterial vs. zooplankton control of sinking particle flux in the ocean’s twilight zone. Limnology and Oceanography. . Limnolory and Oceanography53 1327 - 1338 2008年査読国際共著

Toru Kobari, Kazuaki Tadokoro, Hiroya Sugisaki and Hiroshi Ito . Response of Eucalanus bungii to oceanographic conditions in the western subarctic Pacific Ocean: Retrospective analysis of the Odate Collections. . Deep-Sea Resarch II54 2748 - 2759 2007年11月査読

Toru Kobari, Yurie Kobari and Shuichi Koga . Possible underestimation of chlorophyll a measurements for subtropical phytoplankton community by the pigment extraction and the fluorometric determination. . South Pacific Study28 1 - 8 2007年10月

Toru Kobari, Keiko Shimizu, Seiko Nishikawa, Akimasa Habano . Seasonal variation in abundance of Oithonidae copepods in the Kagoshima Bay . Memoirs of the Faculty of Fisheries, Kagoshima University55 61 - 68 2006年12月

T. Kobari, T. Nagaki, K. Takahashi . Seasonal changes in abundance and development of Calanus pacificus (Crustacea: Copepoda) in the Oyashio-Kuroshio Mixed Region. . Marine Biology144 ( 4 ) 713 - 721 2004年4月査読

Toru Kobari, Atushi Tsuda, Akiyoshi Shinada . Functional roles of interzonal migrating mesozooplankton in the western subarctic Pacific . Progress in Oceanography57 ( 42067 ) 279 - 298 2003年6月査読

Toru Kobari, Tsutomu Ikeda, Yasuji Kanno, Naonobu Shiga, Shogo Takagi, Tomonori Azumaya . Interannual variations in abundance and body size in Neocalanus copepods in the central North Pacific . Journal of Plankton Research25 ( 5 ) 483 - 494 2003年5月査読

Toru Kobari, Kazuaki Tadokoro, Akihiro Shiomoto, Shinji Hashimoto . Geographical variations in prosome length and body weight of Neocalanus copepods in the North Pacific . Journal of Oceanography59 3 - 10 2003年2月査読

小針統 . これからのプランクトン研究をどうするか - 動物プランクトン研究の変遷と今後の展開視点 . Bulletin of Plankton Society of Japan50 ( 1 ) 25 - 29 2003年2月査読

Toru Kobari, Tsutomu Ikeda . Ontogenetic vertical migration and life cycle of Neocalanus plumchrus (Crustacea: Copepoda) in the Oyashio region, with notes on regional variations in body size . Journal of Plankton Research23 ( 3 ) 287 - 302 2001年3月査読

Toru Kobari, Tsutomu Ikeda . Life cycle of Neocalanus flemingeri (Crustacea: Copepoda) in the Oyashio region, western subarctic Pacific, with notes on its regional variations. . Marine Ecology Progress Series209 243 - 255 2001年1月査読

小針統, 池田勉 . 親潮域におけるNeocalanus属カイアシ類の生活史 . 日本プランクトン学会報47 ( 2 ) 129 - 135 2000年8月査読

Toru Kobari, Tsutomu Ikeda . Vertical distribution, population structure and life cycle of Neocalanus cristatus (Crustacea: Copepoda) in the Oyashio region, with notes on its regional variations . Marine Biology134 683 - 696 1999年9月査読

Toru Kobari, Syuhei Ban . Life cycles of two limnetic cyclopoid copepods, Cyclops vicinus and Thermocyclops crassus, in two different habitats . Journal of Plankton Research20 1073 - 1086 1998年6月査読

伊藤穂香, 数野真, 吉江直樹, 久米元, 長井健容, 畑辺佳奈子, 小針統 . 黒潮域およびその近隣水域における動物プランクトン現存量，生産力および分類群組成の地理変化 . 日本プランクトン学会報73 ( 1 ) 1 - 13 2026年2月

記述言語：日本語出版者・発行元：日本プランクトン学会

Growing evidence highlights the diverse biogeochemical processes that stimulate biological productivity in the oligotrophic Kuroshio. Although biological productivity stimulated by upwelling nutrients has been proposed by experimental approaches and intensive oceanographic observations, subsequent increases in zooplankton standing stocks and productivity have not been observed in the downstream Kuroshio. Here, we report geographical variations in standing stocks, productivity, and taxonomic composition of zooplankton communities in the Kuroshio based on oceanographic observations. Less saline water in the surface layers extended toward the Kuroshio Current, corresponding to high nutrient and chlorophyll a concentrations. Zooplankton standing stocks and taxonomic compositions exhibited significant differences between the coastal and Kuroshio waters, but no clear pattern was observed from the upstream to the downstream Kuroshio. Based on multivariate analysis, copepod species compositions were segregated between the coastal and Kuroshio waters, but some coastal species appeared abundantly in the Kuroshio waters. Significant positive correlations were found between nutrients, chlorophyll a concentrations, and zooplankton standing stocks, and the mixed ratio of less saline waters. We suggest that the geographical distribution patterns of zooplankton standing stocks and community structure along the Kuroshio current are affected by the advection of coastal communities in less saline waters than by locally stimulated biological productivity.

DOI： 10.24763/bpsj.73.1_1

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CiNii Research

Tomiyasu T., Uwashitomi H., Wakimaru T., Kodamatani H., Kanzaki R., Kobari T. . Seasonal variations in mercury species and selenium in plankton from Kagoshima Bay, southern Kyushu, Japan: Impact of active submarine volcanoes on ecosystems . Marine Chemistry275 104610 - 104610 2026年1月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Marine Chemistry

Seawater and plankton sampling were conducted every two months from 2019 to 2022 in the inner and central parts of Kagoshima Bay, where submarine volcanic activity continues at a bottom of 200 m depth in the inner part. Plankton samples were collected using a plankton net, with vertical hauls at depths of 0–140 m and 140–200 m just above the submarine volcano, and at 0–200 m in the central part of the bay. The collected samples were separated into phytoplankton (< 100 mm) and zooplankton (> 100 mm) for analysis of organic mercury, inorganic mercury and total selenium. The inorganic mercury concentrations in phytoplankton and zooplankton collected at the 140–200 m depth just above the submarine volcano were 1.80 ± 0.61 mg kg−1 and 0.47 ± 0.34 mg kg−1, respectively, while organic mercury concentrations were 0.15 ± 0.11 mg kg−1 and 0.16 ± 0.09 mg kg−1, respectively. These values were an order of magnitude higher than those found in plankton samples from the central part of the bay. In the inner part of the bay, the concentrations of these substances increased in summer and decreased in winter, mirroring fluctuations in seawater mercury concentrations, which are influenced by volcanic activity. The selenium concentrations in phytoplankton and zooplankton at 140–200 m above the submarine volcano were 1.64 ± 0.80 mg kg−1 and 1.82 ± 0.86 mg kg−1, respectively, while in the central part, they were 1.17 ± 0.58 mg kg−1 and 1.84 ± 0.67 mg kg−1, respectively. The organic mercury and selenium concentrations were higher in zooplankton than in phytoplankton at the locations of central part and 0–140 m above the fumaroles, which may suggest migration of organic mercury and selenium to higher trophic levels. Conversely, at the location just above the submarine volcano, no significant differences were observed between phytoplankton and zooplankton, and a significant negative correlation ( r = −0.72, p < 0.05) was observed between selenium and organic mercury concentrations in zooplankton with high mercury levels. This negative correlation may indicate an antagonistic effect of selenium on the accumulation of organic mercury in zooplankton.

DOI： 10.1016/j.marchem.2026.104610

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