Researcher basic information

• Ph. D., Hokkaido University, Mar. 2013

• https://researchmap.jp/kmatsuno?lang=en

• https://jglobal.jst.go.jp/detail?JGLOBAL_ID=201401062013009337
• http://hu-plankton.jp/
• https://sites.google.com/view/koheimatsuno

• 90712159

• 201401062013009337

• Harmful algae bloom
• PlanktoScope
• FlowCam
• ZooScan
• diatoms
• マイクロプランクトン
• 気候変動
• グリーンランド
• Antarctic Ocean
• size spectra
• Sediment trap
• community structure
• phytoplankton
• Copepoda
• Arctic Ocean
• Zooplankton

• Life Science, Aquatic bioproduction science, プランクトン
• Environmental Science/Agriculture Science, Environmental dynamic analysis

• Bachelor's degree program, School of Fisheries Sciences
• Master's degree program, Graduate School of Fisheries Sciences
• Doctoral (PhD) degree program, Graduate School of Fisheries Sciences

Research activity information

• May 2018, The Oceanographic Society of Japan, The Okada Prize
  松野孝平
• Mar. 2017, The Plankton Society of Japan, Young Investigators Award of the Plankton Society of Japan
  Matsuno Kohei
• Mar. 2016, National Institute of Polar Research, GRENE Arctic Project Young Researcher Award
  Matsuno Kohei
• Mar. 2013, 北海道大学大学院水産科学院, 伊藤一隆賞
  松野孝平
• Mar. 2012, 2012年度日本海洋学会春季大会, ベストポスター賞
  松野孝平

• Population dynamics and cell size structure of Karenia mikimotoi during an algal bloom event in Hakodate Bay, Japan
  Hoi Ching Lau; Akihide Kasai; Shoko Tatamisashi; Masahide Wakita; Kwee Siong Tew; Kohei Matsuno
  Regional Studies in Marine Science, 98, 105061, 105061, Elsevier BV, Jun. 2026, [Peer-reviewed], [Last author, Corresponding author]
  English, Scientific journal, 50794126;50794360
• Effects of different freshwater sources on microplankton in the Western Arctic Ocean
  Dai Sumiyoshi; Manami Tozawa; Amane Fujiwara; Kohei Matsuno
  Frontiers in Marine Science, 13, 13, Frontiers Media SA, 13 May 2026, [Peer-reviewed], [Last author]
  English, Scientific journal, While freshwater input into the western Arctic Ocean is increasing, studies evaluating the impacts of different freshwater sources—namely river water and sea-ice meltwater—on microplankton remain limited. In this study, we examined microplankton and hydrographic conditions during the late summers of 2021, 2023, and 2024 to evaluate the influences of different freshwater sources. Microplankton were identified and counted using an inverted microscope. In addition to water temperature, salinity, and nutrient concentrations, the fractions of river runoff ( f _rro ) and sea ice meltwater ( f _simw ) were estimated. High microplankton abundance (56,000 cells L ⁻¹ ) was observed in the group strongly influenced by river water ( f _rro : 3%) but less affected by sea ice meltwater ( f _simw : 7%), whereas the group strongly influenced by both freshwater sources ( f _rro : 4%, f _simw : 15%) exhibited low abundance (530 cells L ⁻¹ ). In the former group, a lower overall freshwater proportion may have inhibited the full development of salinity stratification, allowing enhanced nutrient supply from deeper layers through upwelling. Therefore, nutrient-demanding taxa such as Chaetoceros dominated in the group. In contrast, strong salinity stratification in the latter group may have limited nutrient supply to surface waters. Consequently, heterotrophic taxa such as ciliophora tended to dominate. To our knowledge, this study provides one of the first evaluations of how different freshwater sources influence microplankton in the western Arctic Ocean. We compared the effects of freshwater accumulation on microplankton across different regions. Our results indicate that phytoplankton proliferation can be either promoted or suppressed depending on differences in freshwater sources and their complex interactions with environmental factors. This study provides a detailed assessment of how distinct freshwater sources, such as river water and sea ice meltwater, influence microplankton dynamics in the western Arctic Ocean. Furthermore, in 2021, sea ice melt was unusually delayed, and extensive sea ice remained even in the late summer. We also examined whether this unusually extensive sea ice influenced the microplankton community structure. Together, these results highlight the importance of considering both the magnitude and source of freshwater input, as well as sea-ice conditions, when evaluating microplankton dynamics in the western Arctic Ocean., 50794126;51318736;50850986;46097578
• Relationship Between the Distribution of Gray Whales (<i>Eschrichtius robustus</i>) and Two Types of Prey in the Northern Bering and Chukchi Seas
  Yuka Iwahara; Kazushi Miyashita; Yutaka Watanuki; Atsushi Yamaguchi; Takashi Uyama; Bungo Nishizawa; Tsubasa Nakano; Hiroko Sasaki; Keiko Sekiguchi; Kohei Matsuno; Yoko Mitani
  ARCTIC, 78, 3, 236, 250, The Arctic Institute of North America, 07 Apr. 2026, [Peer-reviewed]
  English, Scientific journal, We examined the distributional relationship between gray whales and their prey, benthic amphipods and euphausiids, using data collected from shipboard surveys in the Pacific Arctic. We conducted four survey cruises (in 2007, 2008, 2012, and 2013) in the northern Bering Sea, Chukchi Sea, and adjacent waters, and collected data on cetacean sightings, including gray whales, benthic amphipods by benthic grabs, and euphausiids using plankton nets. We observed a total of 160 gray whales from 55 groups during the four surveys. Statistical analysis across the study area using a generalized linear model indicated that gray whale distribution was related to benthic amphipods, whereas their relationship with euphausiids was unclear. The Distributed Biological Observatory 3 (DBO3) area off Point Hope, Alaska, had the highest density of gray whales (0.035 individuals/km2, hereafter referred to as ind./km2) in the fall of 2012 compared with the densities of the other surveys (0.00 – 0.006 ind./km2). Higher biomass of euphausiids and higher average wet weight of a single euphausiid were also observed in the fall of 2012, which may have contributed to the high density of gray whales. Aligning with previous direct confirmation by visual whale surveys and prey sampling in the fall of 2003, the present study confirmed that, in the fall of 2012, the DBO3 area was an area where gray whales could feed on both benthic amphipods and euphausiids.
• Seasonal Variation in Diatom Availability and Utilization by Juvenile Japanese Sea Cucumber Apostichopus japonicus
  Takuma Matsumoto; Kohei Matsuno; Yuji Anaguchi; Nobuharu Inaba
  Microorganisms, 14, 3, 677, 677, MDPI AG, 16 Mar. 2026, [Peer-reviewed]
  English, Scientific journal, Diatoms are considered an important food source for the commercially valuable sea cucumber Apostichopus japonicus. However, food sources for juvenile A. japonicus in the wild remain understudied, despite their importance for effective stock enhancement. In this study, seasonal diatom assemblages and viability in the feces of juvenile A. japonicus and in the feeding environments (biofilm, water column) were investigated using direct microscopy to evaluate diatom availability and utilization by the juveniles. Additionally, a laboratory feeding experiment was conducted to examine the digestibility of the predominant diatom (Tabularia) in the feces during the field survey. Field surveys have shown that diatoms are a major food item for juveniles, although their contribution varies seasonally with shifts in dominant food sources. Notably, Tabularia spp. occurred at a higher relative proportion in fecal assemblages than in the feeding environments and exhibited high mortality in the feces (96.3 ± 2.4%). Consistently, laboratory experiments showed marked degradation of intracellular contents in Tabularia sp. after excretion, supporting its digestibility. These findings have broadened our understanding of optimal food sources for A. japonicus juveniles as well as their feeding ecology in natural environments, informing the selection of more suitable diets and potentially enhancing stock enhancement practices.
• Synthesis of spatiotemporal variability in western Arctic zooplankton communities from summer to fall during 2008–2021
  Jee-Hoon Kim; Yuya Hibino; Eun Jin Yang; Kyoung-Ho Cho; Hyoung Sul La; Sung-Ho Kang; Jeong-Hyun Kim; Hyeju Yoo; Jong-Kuk Moon; Yoshiyuki Abe; Nanami Hosoda; Atsushi Yamaguchi; Kohei Matsuno
  Progress in Oceanography, 241, 103634, 103634, Elsevier BV, Jan. 2026, [Peer-reviewed], [Last author, Corresponding author]
  English, Scientific journal, 45292537;50794342;46097578;45070011
• Zooplankton diel vertical migration and sediment resuspension detected from CEOF analysis of ADCP backscatter in the western Sea of Okhotsk
  Kay I. Ohshima; Mamoru Ohshima; Masato Ito; Kazuki Nakata; Mizuki Kuga; Kohei Matsuno; Atsushi Yamaguchi
  Progress in Oceanography, 241, 103630, 103630, Elsevier BV, Jan. 2026, [Peer-reviewed]
  English, Scientific journal
• Influence of early sea ice melting on the autumn microplankton community of the Pacific Arctic Ocean
  Kohei Sumiya; Dai Sumiyoshi; Kazutoshi Sato; Akihiko Murata; Shigeto Nishino; Kohei Matsuno
  Polar Science, 46, 101255, 101255, Elsevier BV, Dec. 2025, [Peer-reviewed], [Last author]
  English, Scientific journal, 50794126;51318736;46097578
• Comparison of the ecology of pelagic copepods as basibionts and suctorian ciliates as epibionts in the subarctic Pacific
  Daiki Kojima; Shuo Wang; Kohei Matsuno; Goh Nishitani; Atsushi Yamaguchi
  Journal of Plankton Research, 47, 6, Oxford University Press (OUP), 07 Oct. 2025, [Peer-reviewed]
  English, Scientific journal, ABSTRACT
  
  Suctorian ciliates are widely distributed in both freshwater and marine environments. In the open ocean, they attach to crustacean zooplankton, specifically copepods, as epibiont hosts. However, criteria for host preference in oceanic areas remain unclear. In this study, we conducted a molecular analysis, examined copepod community relationships and performed laboratory-rearing experiments on suctorian ciliates in the subarctic Pacific. Suctorians belonging to five genera and species were observed on the exoskeletons of 20 copepod species across 10 genera. Additionally, species-specific host preferences were observed. Molecular analyses revealed intraspecific variations and haplotypes in suctorian ciliates, with no correlation between the haplotypes and host copepods or geographical location. Suctorians did not prefer numerically dominant or large-sized copepod species but favored deep-sea or diel vertical migration (DVM) species, specifically carnivorous copepods. A high suctorian prevalence was observed during the late copepodite stages, specifically among adult females and in regions with cold waters. These characteristics indicate that suctorians rely on prey or host molting events. Laboratory experiments confirmed novel suctorian attachments and growth from swarmer to trophont within 24 h. This study indicates that suctorian epibionts prefer late copepodite stages in deep-sea habitats, exhibiting DVM, prolonged stage duration and low predation risk.
• Changes in the coastal environments and their impact on society in the Qaanaaq region, northwestern Greenland
  Shin Sugiyama; Atsushi Yamaguchi; Tatsuya Watanabe; Yasumasa Tojo; Naotaka Hayashi; Jean-Baptiste Thiebot; Makoto Tomiyasu; Kohei Hasegawa; Yoko Mitani; Mayuko Otsuki; Yuta Sakuragi; Monica Ogawa; Kenzo Tanaka; Kaisei Sakurai; Kohei Matsuno; Naoya Kanna; Evgeny Podolskiy; Ryo Kusaka; Yefan Wang; Takuro Imazu; Kaho Watanabe; Ken Sato; Shinta Ukai; Soratakato Yamada; Ken Kondo; Shintaro Yamasaki; Kazutaka Tateyama; Kazutoshi Sato; Jun Inoue; Taro Mori; Tatsuya Fukazawa; Aqqalu Rosing-Asvid; Kirsty Langley; Andrea M.U. Gierisch; Jenna Sutherland; Toku Oshima
  Polar Science, 45, 101206, 101206, Elsevier BV, Sep. 2025, [Peer-reviewed]
  English, Scientific journal
• Towards an integrated assessment of the Arctic marine ecosystems in response to abrupt environmental changes: Contribution from the Arctic challenge for sustainability II (ArCS II) project
  Takafumi Hirata; Irene D. Alabia; Amane Fujiwara; Yuri Fukai; Jorge García Molinos; Akihide Kasai; Tatsuya Kawakami; Kohei Matsuno; Jonaotaro Onodera; Takuhei Shiozaki; Hiromichi Ueno; Eiji Watanabe
  Polar Science, 45, 101260, 101260, Elsevier BV, Sep. 2025, [Peer-reviewed]
  English, Scientific journal
• Mass Occurrence of Walleye Pollock Gadus chalcogrammus (Gadidae) in the Surface Layer of the Oyashio Basin (Western North Pacific): Possible Benefit from Abundant Copepods
  O. Yamamura; K. Matsuno; M. Ohwada; Y. Kamei
  Journal of Ichthyology, 65, 3, 488, 494, Pleiades Publishing Ltd, 18 Apr. 2025, [Peer-reviewed]
  English, Scientific journal
• Quantitative evaluation of <i>Karenia</i> cells using FlowCam: Applying to its distribution in Hidaka Bay, southern Hokkaido, northern Japan during autumn 2022
  Hikaru Kubo; Takahiro Iida; Keiri Imai; Atsushi Ooki; Kohei Matsuno
  Plankton and Benthos Research, 20, 1, 1, 11, The Plankton Society of Japan/The Japanese Association of Benthology, 28 Feb. 2025, [Peer-reviewed], [Last author, Corresponding author]
  English, Scientific journal
• Relationship between ltering eciency estimated using quad-NORPAC net sampling and ocean conditions: Example from the Indian sector of the Southern Ocean during summer
  YURIKA MAEDA; KOHEI MATSUNO; RIKUTO SUGIOKA; HIROTO MURASE
  Bulletin of the Plankton Society of Japan, 72, 1, 1, 6, 25 Feb. 2025, [Peer-reviewed], [Corresponding author]
  Japanese, Scientific journal
• Spatio-temporal changes in the macrozooplankton community in the eastern Indian sector of the Southern Ocean during austral summers: A comparison between 1996 and 2018–2019
  Ippei Urabe; Kohei Matsuno; Rikuto Sugioka; Ryan Driscoll; Sara Driscoll; Fokje L. Schaafsma; Atsushi Yamaguchi; Ryuichi Matsukura; Hiroko Sasaki; Hiroto Murase
  Progress in Oceanography, 231, 103414, 103414, Elsevier BV, Feb. 2025, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Effect of delayed sea ice retreat on zooplankton communities in the Pacific Arctic Ocean: a generalized dissimilarity modeling approach
  Yuya Hibino; Kohei Matsuno; Amane Fujiwara; Yoshiyuki Abe; Nanami Hosoda; Motoyo Itoh; Atsushi Yamaguchi
  Frontiers in Marine Science, 12, Frontiers Media SA, 29 Jan. 2025, [Peer-reviewed], [Corresponding author], [International Magazine]
  English, Scientific journal, Introduction
  
  Sea ice extent increased in the Pacific Arctic Ocean during 2021 owing to the reversal of the Beaufort Gyre, unlike in previous years. The increased sea ice concentration may restore the marine ecosystem to its previous state; nevertheless, the precise conditions and mechanisms involved remain unclear.
  
  Methods
  
  In this study, the 2008–2017 period was defined as “the sea ice retreat year,” and its zooplankton community distribution representative was estimated using generalized dissimilarity modeling (GDM). Subsequently, we assessed the effect of delayed sea ice melt on the zooplankton community by comparing the zooplankton community of the sea ice retreat year with that in 2021.
  
  Results
  
  In GDM, numerous satellite parameters significantly affected the zooplankton distribution, with the highest effect during the open-water period and annual primary production (APP) and the lowest in water temperature. The effect of APP and temperature on zooplankton similarity was high around the Bering Strait owing to the advection of Pacific copepods (Eucalanus bungii, Metridia pacifica, and Neocalanus spp.) and synchronized inflow of warm Pacific water. Under significant warming scenarios (Shared Socioeconomic Pathway [SSP]1-2.6 and SSP5-8.5), GDM-based multiple effects predicted that the zooplankton communities in high latitudes will be more affected than those on the southern shelf (northern Bering Sea to southern Chukchi Sea). In 2021, the total abundance across the northern Bering Sea to the Chukchi Sea shelf region was lower than that of the community during the sea ice retreat year. However, certain species (Limacina helicina and Pacific copepods) increased locally (northern Bering Sea and Barrow Canyon) because of the increasing volume of Pacific origin water.
  
  Discussion
  
  Contrary to the reported increase trend on zooplankton, low primary productivity and phenological mismatch for zooplankton may prevail in the Pacific Arctic Ocean, resulting in a low abundance during autumn 2021.
• Mortality Risk of Juvenile Japanese Sea Cucumber Apostichopus japonicus by the Sympatrically Occurring Hermit Crab Paguristes ortmanni
  Nobuharu Inaba; Takuma Matsumoto; Yuji Anaguchi; Kohei Matsuno
  Aquaculture Research, 2025, 1, Wiley, Jan. 2025, [Peer-reviewed], [Last author]
  English, Scientific journal, The density of the hermit crab, Paguristes ortmanni, in the artificial reef of juvenile Apostichopus japonicus increased almost threefold from June to December 2018. Calcareous ossicles of A. japonicus were identified from the stomach contents in 28.8% of the hermit crabs (18.6% in males and 10.2% in females) in December; season hatchery‐produced juveniles are frequently introduced into the wild in Hokkaido, Japan. The mortality rate of juvenile A. japonicus by P. ortmanni was estimated to be 2.5 ± 2.4 individuals day⁻¹ based on laboratory predation experiments. Interestingly, 3% to 5% of individuals survived despite being attacked and injured in all trials, escaping on the shells of hermit crabs. Over 50% of females in the ossicle‐not‐detected group had shield lengths (SLs) smaller than the smallest individual in the ossicle‐detected group. The average SL of the ossicle‐detected group in females was significantly higher (p< 0.01) than that of the not‐detected group, indicating an increased predation risk for A. japonicus juveniles when larger female P. ortmanni were present. The present study offers new insights into the predatory behavior of P. ortmanni toward A. japonicus juveniles, showing that these sympatric hermit crabs present a considerably high mortality risk to A. japonicus juveniles. It also emphasizes the importance of implementing appropriate measures to protect juveniles from predators during the release process, providing an essential viewpoint for enhancing and rebuilding the wild population of commercially important endangered A. japonicus.
• Vertical variations in zooplankton size spectra down to 3,000 m depth and significant effects of the sizes of Calanoida and Ergasilida across the subarctic, transitional, and subtropical regions of the western North Pacific
  Dongwoo Kim; Sota Komeda; Kohei Matsuno; Atsushi Yamaguchi
  Deep Sea Research Part I: Oceanographic Research Papers, 104445, 104445, Elsevier BV, Jan. 2025, [Peer-reviewed]
  English, Scientific journal
• Seasonal changes in the protist communities of Hakodate Bay, southern Hokkaido, from 2020 to 2022
  Yusuke Hamao; Kyosei Morimoto; Shoko Tatamisashi; Masahide Wakita; Akihide Kasai; Kohei Matsuno
  Regional Studies in Marine Science, 78, 15 Dec. 2024, [Peer-reviewed], [Last author, Corresponding author]
  English, Scientific journal
• Spatiotemporal changes in the community and demography of mesozooplankton in the eastern Indian sector of the Southern Ocean during austral summer 2018/2019
  Kohei Matsuno; Rikuto Sugioka; Yurika Maeda; Ryan Driscoll; Fokje L. Schaafsma; Sara Driscoll; Atsushi Yamaguchi; Ryuichi Matsukura; Hiroko Sasaki; Hiroto Murase
  Progress in Oceanography, 229, 103360, 103360, Elsevier BV, Dec. 2024, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• The modified artificial cohort method for three dominant pelagic copepods in the northern North Pacific revealed species-specific differences in the optimum temperature
  Takumi Teraoka; Shuya Nagao; Kohei Matsuno; Atsushi Yamaguchi
  Frontiers in Marine Science, 11, 1397721, 1397721, Frontiers Media SA, 02 Oct. 2024, [Peer-reviewed]
  English, Scientific journal, The most concerning recent ocean changes in temperature issues are known as marine heat waves. Under these conditions, it is important to evaluate the effects of temperature on zooplankton. In this study, we investigated the growth rates of three dominant copepod species (Eucalanus bungii, Metridia pacifica, and Neocalanus plumchrus) in the northern North Pacific under three different temperature conditions (3, 7, and 11°C) using an artificial cohort method. Experimental conditions for 42 hour incubations were set to light intensity and photoperiod corresponding to 50 m depth. The dissolved oxygen solubility after rearing ranged from 69.2% to 102.1%, suggesting sufficient conditions for copepod growth. Chlorophyll a increased in 83% of the experiments, indicating that the food conditions were sufficient for the copepods. The mean proportion of dead specimens evaluated using neutral red was 10.2%, corresponding with the reported values in the field. Thus, it can be concluded that the laboratory-rearing conditions used in this study provided sufficient food, and the only effect evaluated would be that of the three different temperatures. Since the developmental time for each stage is longer than the rearing period, it is important to conduct experiments with a large number of individuals to obtain accurate growth rate results. The specific growth rates of E. bungii and M. pacifica increased with increasing temperature. In contrast, N. plumchrus showed the highest growth rate under moderate water temperature conditions. In terms of weight units (dry, carbon, and nitrogen), the carbon weight-specific growth rates were higher than those of the other two units, a common characteristic of the three species. This reflected lipid accumulation during the late copepodite stages. The interspecies differences in growth rate responses to water temperature reflect species-specific differences in temperature tolerance or the optimum temperature for each species. As E. bungii and M. pacifica reproduce near the surface layer through income breeding, their temperature tolerance or optimum temperature is expected to be high. However, because the reproduction of N. plumchrus occurs in the cold deep layer by using capital breeding, its temperature tolerance and optimum temperature would be lower than those of the former two species.
• East-west differences of the microplankton community along the 47°N transect in the subarctic Pacific during the summer of 2021
  Kosuke Egashira; Yu-Sin Huang; Kohei Matsuno; Atsushi Yamaguchi
  Bulletin of Fisheries Sciences, Hokkaido University, 74, 1, 23, 33, Aug. 2024
  English, Research institution
• Size spectra of phytoplankton and zooplankton in the western North Pacific during May : A comparison between subarctic and transitional domains
  Li Wang; Xufa Ma; Dongwoo Kim; Kohei Matsuno; Atsushi Yamaguchi
  Bulletin of Fisheries Sciences, Hokkaido University, 74, 1, 13, 22, Aug. 2024
  English, Research institution
• Zooplankton communities at the sea surface of the eastern Indian sector of the Southern Ocean during the austral summer of 2018/2019
  Fokje L. Schaafsma; Kohei Matsuno; Ryan Driscoll; Hiroko Sasaki; Marin van Regteren; Sara Driscoll; Ryuichi Matsukura; Rikuto Sugioka; Ippei Urabe; Hiroto Murase; Jan Andries van Franeker
  Progress in Oceanography, 226, 103303, 103303, Elsevier BV, Aug. 2024, [Peer-reviewed]
  English, Scientific journal
• Characteristics of late summer Arctic brash sea ice and its melting effect on the surface-water biogeochemistry of the Chukchi Shelf and Canada Basin
  Ryota Akino; Daiki Nomura; Reishi Sahashi; Manami Tozawa; Mariko Hatta; Kohei Matsuno; Wakana Endo; Takuhei Shiozaki; Tatsuya Kawakami; Masato Ito; Akihiko Murata; Amane Fujiwara
  Elem Sci Anth, 12, 1, University of California Press, 27 May 2024, [Peer-reviewed]
  English, Scientific journal, To understand the impact of the melting of late summer Arctic brash ice on the surface waters of the Chukchi Sea, we collected sea-ice samples during 2021. Floating sea ice was collected by a wire mesh pallet cage from the side of the R/V Mirai. We measured physical and biogeochemical parameters such as salinity, oxygen stable isotopic ratios, turbidity, and concentrations of chlorophyll-a and nutrients. The samples of brash ice were multiyear ice based on satellite back-trajectory analysis. Comparison of nutrient concentrations in brash ice with those of seawater samples from the temperature minimum layer similar to the water in the sea ice originated suggested that the characteristics of the brash ice were greatly affected by biogeochemical processes such as remineralization. The extremely high turbidity and concentrations of chlorophyll-a observed in the brown/green ice samples reflected the impact of sediment as well as the influence of biological activities. The N:P ratios were less than 1 because of the high phosphate concentrations, even though the ammonium concentrations were high. We hypothesized that this low N:P ratio reflected the combined effects of the accumulation of nutrients due to remineralization in the biofilm and differences of remineralization rate and adsorption features of nitrogen and phosphorus. Based on the high nitrate and ammonium concentrations in the sea-ice samples, we postulated a marked impact of sea-ice meltwater on the nitrogen cycle in the nitrate-depleted surface waters of the Chukchi Sea during late summer. We estimated that meltwater nitrogen could support 0.3%–2.6% of primary production in the northern Chukchi Sea. Our results suggest that high-turbidity ice will play an important role as a source of nutrients to the ocean during melting of sea ice, and understanding its distribution, amount, and geochemical characteristics is vital.
• Sediment trap samples reveal regional differences in the population structure of Calanus hyperboreus from the Arctic Ocean
  Koki Tokuhiro; Kohei Matsuno; Jonaotaro Onodera; Makoto Sampei; Amane Fujiwara; Naomi Harada; Barbara Niehoff; Eva-Maria Nöthig; Atsushi Yamaguchi
  Journal of Plankton Research, 46, 2, 183, 193, Oxford University Press (OUP), 22 Jan. 2024, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
  English, Scientific journal, Abstract
  
  Calanus hyperboreus is one of the dominant copepod species in the Arctic zooplankton communities. The impact of climate change varies among regions within the Arctic, implying that C. hyperboreus populations may be differently affected at different locations, but knowledge on seasonal population dynamics in relation to biogeography is scarce. To fill this gap, we counted C. hyperboreus in samples from sediment traps that were moored from 2009 to 2014 in three regions of the Arctic Ocean (eastern Fram Strait, northern Chukchi Sea and MacKenzie Trough). The C. hyperboreus flux increased between April and May in all regions, likely associated with the ascent from overwintering depth to the surface. In the descent period, high fluxes were observed between July and September in the Fram Strait, between September and November in the northern Chukchi Sea, and between August and October in the MacKenzie Trough, suggesting that the timing of descent varied among the regions characterized by differences in light regime, phytoplankton development and water temperature. The copepodite stage composition in the eastern Fram Strait and the MacKenzie Trough varied with season, suggesting successful local reproduction while it was uniform in the northern Chukchi Sea, possibly because the population is fueled by advection.
• Multidisciplinary research for sea ice in Saroma-ko Lagoon, Hokkaido, Japan 2023（2023年北海道サロマ湖における学際的海氷研究について）
  Daiki NOMURA; Ryota AKINO; Matthew CORKILL; Keizo HIRANO; Akihide KASAI; Seiji KATAKURA; Yusuke KAWAGUCHI; Tatsuya KAWAKAMI; Riri KIMURA; Delphine LANNUZEL; Ryosuke MAKABE; Mirai MATSUURA; Kohei MATSUNO; Klaus MEINERS; Keizo NAGASAKI; Yuichi NOSAKA; Nana SAMORI; Shinnosuke SAKAYA; Eun Yae SON; Ryotaro SUGA; Yumi SUNAKAWA; Keigo D. TAKAHASHI; Masaharu TAKAHASHI; Yuka TAKEDA; Takenobu TOYOTA; Manami TOZAWA; Pat WONGPAN; Hiroshi YOSHIDA; Kazuhiro YOSHIDA; Masaki YOSHIMURA
  Bulletin of Glaciological Research, 42, 19, 37, Japanese Society of Snow and Ice, 2024, [Peer-reviewed]
  English, Scientific journal
• Seasonal variation in microplankton communities in Suttsu, Hokkaido, northern Japan, from 2020 to 2022
  Kyosei Morimoto; Yusuke Hamao; Tomoyasu Yamazaki; Shoko Tatamisashi; Masahide Wakita; Kohei Matsuno
  Regional Studies in Marine Science, 69, 103322, 103322, Elsevier BV, Jan. 2024, [Peer-reviewed], [Last author]
  English, Scientific journal
• Vertical changes in zooplankton abundance, biomass, and community structure at seven stations down to 3000 m in neighboring waters of Japan during the summer: Insights from ZooScan imaging analysis
  Kunito Yamamae; Yasuhide Nakamura; Kohei Matsuno; Atsushi Yamaguchi
  Progress in Oceanography, 219, 103155, 103155, Elsevier BV, Dec. 2023, [Peer-reviewed]
  English, Scientific journal
• Zooplankton size composition and production just after drastic ice coverage changes in the northern Bering Sea assessed via ZooScan
  Shino Kumagai; Kohei Matsuno; Atsushi Yamaguchi
  Frontiers in Marine Science, 10, Frontiers Media SA, 29 Nov. 2023, [Peer-reviewed]
  English, Scientific journal, Drastic environmental changes were noted in the northern Bering Sea in 2018. A reduction in sea ice affected several trophic levels within the ecosystem; this resulted in delayed phytoplankton blooms, the northward shifting of fish stocks, and a decrease in the number of seabirds. Changes in the community composition of zooplankton were reported in 2022, but changes in zooplankton interactions and production have not been reported to date. Therefore, this study examined predator-prey interaction, secondary production, and prey availability for fish to understand the effect of early sea ice melt. Zooplankton size data were estimated from the size spectra obtained using ZooScan based on samples collected in 2017 and 2018. A cluster analysis based on biovolume showed that the zooplankton community could be divided into three groups (Y2017N, Y2017S, Y2018). Y2017N, characterized by low abundance, biomass, and production, Y2017S, characterized by high biovolume and production, which contributed with Calanus spp., and Y2018, characterized by low biovolume but high production, contributed with small copepods, and Bivalvia. In 2017, the highest biovolume group was observed south of St. Lawrence Island, and it was dominated by Calanus spp. and Chaetognatha. Normalized size spectra of this group showed the highest secondary production with present predator-prey interactions, suggesting that the area provides high prey availability for fish larvae and juveniles. In contrast, small copepods and bivalve larvae were dominant in this area in 2018, which contain less carbons and energy, suggesting the prevalence of low-nutrient foods in this year in relation to early sea ice melt.
• Responses of diatom assemblages and life cycle to sea ice variation in the eastern Indian sector of the Southern Ocean during austral summer 2018/2019
  Kohei Matsuno; Kohei Sumiya; Manami Tozawa; Daiki Nomura; Hiroko Sasaki; Atsushi Yamaguchi; Hiroto Murase
  Progress in Oceanography, 218, 103117, 103117, Elsevier BV, Nov. 2023, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• OBSERVATION OF FIN WHALE (BALAENOPTERA PHYSALUS) FEEDING BEHAVIOR IN THE AUSTRAL SUMMER SOUTHERN HEMISPHERE MID-LATITUDES
  Katsumata Taiki; Isoda Tatsuya; Matsuno Kohei; Murase Hiroto; Matsuoka Koji
  Cetacean Population Studies, 4, 34, 39, Publication Committee for Cetacean Population Studies, 11 Oct. 2023
  English, In the Southern Hemisphere, fin whales (Balaenoptera physalus) feed mainly in the latitudinal range between 50°S and 60°S during the austral summer. In February 2021, five fin whales were sighted about 1,000 km south of the Cape of Good Hope, South Africa at position 43°49′S, 19°12′E. Feeding behavior was evident as the whales were lunging laterally into surrounding red patches with their mouth open. Examination of sampled red patches revealed that the fin whales were feeding on either Calanus australis or C. agulhensis. This is the first report of fin whales preying on Calanus spp. in this sea area and time of the year.
• Geographic variation in population structure and grazing features of Calanus glacialis/marshallae in the Pacific Arctic Ocean
  Minami Ishihara; Kohei Matsuno; Koki Tokuhiro; Yasuhiro Ando; Kazutoshi Sato; Atsushi Yamaguchi
  Frontiers in Marine Science, 10, Frontiers Media SA, 20 Sep. 2023, [Peer-reviewed]
  English, Scientific journal, Calanus glacialis/marshallae is a dominant zooplankton species in the Pacific Arctic Ocean that is widely distributed in shelf areas, and it plays a vital role in connecting primary production to higher trophic levels. Its phenology is well adapted to hydrography, but there is little available information about regional and diel changes in population structure and grazing features. In this study, we investigated C. glacialis/marshallae during autumn 2019 in the Eastern and Northeastern Chukchi and Canadian basins to reveal geographic and diel variations in population structure, body size, grazing activity, and fatty acid composition. The abundance of C. glacialis/marshallae was found to be high on the slopes and low on the shelves. Body size (prosome length) was well described by the Bělehrádek equation combined with in-situ temperature throughout the sampling region. Cluster analyses based on hydrographic parameters were divided into four regions: southern shelf, northern shelf, slope, and basin. The southern shelf was dominated by copepodite stage five (C5) transported from the Bering Sea by Pacific waters. C4 and C5 were dominant on the northern shelf, suggesting that they grew slower than those on the southern shelf, and the populations also exhibited higher concentrations of fatty acids originating from dinoflagellates than those originating from the pan-Arctic Ocean, indicating low productivity in the region. The population on the slope had the highest abundance, C4 was dominant, and large amounts of diatom-derived eicosapentaenoic acid (EPA). These features are attributed to the upwelling of populations and nutrients that support diatom growth. In the basin, the early copepodite stages of composition were distinctly higher than those recorded in previous studies, because larger amounts of organisms flow into the region, resulting in more extended reproduction periods. In the basin, small and large forms of C5 were simultaneously found, and the small form exhibited a diel grazing activity pattern, but the large forms did not. These findings suggest their well adaptation in changing of the Pacific Arctic Ocean.
• Interannual and spatial variation in small zooplankton off Vincennes Bay, East Antarctica
  Aiko Tachibana; Yuri Ohkubo; Kohei Matsuno; Keigo D. Takahashi; Ryosuke Makabe; Masato Moteki
  Polar Biology, Springer Science and Business Media LLC, 18 Jul. 2023, [Peer-reviewed]
  English, Scientific journal
• Seasonal changes in taxonomic, size composition, and Normalised Biomass Size Spectra (NBSS) of mesozooplankton communities in the Funka Bay, southwestern Hokkaido: Insights from ZooScan analysis
  Takumi Teraoka; Kanako Amei; Yutaka Fukai; Kohei Matsuno; Hiroji Onishi; Atsushi Ooki; Tetsuya Takatsu; Atsushi Yamaguchi
  Plankton and Benthos Research, 17, 4, 369, 382, The Plankton Society of Japan/The Japanese Association of Benthology, 30 Nov. 2022, [Peer-reviewed]
  English, Scientific journal
• Meltwater Discharge From Marine‐Terminating Glaciers Drives Biogeochemical Conditions in a Greenlandic Fjord
  Naoya Kanna; Shin Sugiyama; Takuto Ando; Yefan Wang; Yuta Sakuragi; Toya Hazumi; Kohei Matsuno; Atsushi Yamaguchi; Jun Nishioka; Youhei Yamashita
  Global Biogeochemical Cycles, 36, 11, American Geophysical Union (AGU), Nov. 2022, [Peer-reviewed]
  English, Scientific journal
• Photophysiological response of diatoms in surface sediments to light exposure: A laboratory experiment on a diatom community in sediments from the Chukchi Sea
  Yuri Fukai; Kohei Matsuno; Amane Fujiwara; Koji Suzuki
  Frontiers in Marine Science, 9, Frontiers Media {SA}, 15 Sep. 2022, [Peer-reviewed], [International Magazine]
  English, Scientific journal, Diatoms form dense blooms in the Pacific Arctic region from spring to summer, supporting the unique benthic-pelagic coupling ecosystems. Although the Arctic has a severe light-limited season from autumn to winter, diatoms can proliferate in spring when sufficient light becomes available for photosynthesis. One of the crucial strategies for diatoms to survive in unfavorable growing conditions is to form resting stages. Because of enhanced primary and export production in the Pacific Arctic shelves, many viable diatom resting stages can be detected in the surface sediments. However, little is known about the photophysiological response of viable diatom cells, including resting stages, in sediments to light availability. We conducted a laboratory experiment investigating the photophysiological capabilities of the diatom cells containing resting stages using surface sediments from the Chukchi Sea shelf. As a result, diatoms grew dramatically after light exposure, and Chaetoceros socialis complex highly contributed to the enhanced diatom abundance. Their photophysiological changes were also evident from the maximum quantum efficiency (Fv/Fm) of photochemistry in photosystem II, 13C-based photosynthetic-energy (PE) parameters, diadinoxanthin (DD)-diatoxanthin (DT) pool size, and the de-epoxidation state (DES) of DD. Even after the excess light exposure suppressed the photosynthetic activity in the microalgal cells, the diatoms recovered quickly, indicating the high photophysiological plasticity to dynamic light changes. Therefore, our results suggest that diatoms in surface sediments have a high seeding potential for blooms in the Pacific Arctic shelf region.
• Seasonal, regional, and diel changes in the abundance of five large, dominant copepods in the western subarctic Pacific : Insights from Continuous Plankton Recorder surveys
  Fukai, Yutaka; Chiba, Sanae; Batten, Sonia; Sasaki, Yuka; Matsuno, Kohei; Richardson; Anthony J; Yamaguchi, Atsushi
  Bulletin of Fisheries Sciences, Hokkaido University, 72, 2, 17, 26, 22 Aug. 2022, ［Internationally co-authored］
  English, Research institution
• Vertical distribution, standing stocks, and taxonomic accounts of the entire plankton community, and the estimation of vertical material flux via faecal pellets in the southern Okhotsk Sea
  Daiki Kojima; Yusuke Hamao; Kanako Amei; Yutaka Fukai; Kohei Matsuno; Yoko Mitani; Atsushi Yamaguchi
  Deep Sea Research Part I: Oceanographic Research Papers, 185, 103771, 103771, Elsevier BV, Jul. 2022, [Peer-reviewed], [International Magazine]
  English, Scientific journal
• Effects of Early Sea-Ice Reduction on Zooplankton and Copepod Population Structure in the Northern Bering Sea During the Summers of 2017 and 2018
  Fumihiko Kimura; Kohei Matsuno; Yoshiyuki Abe; Atsushi Yamaguchi
  Frontiers in Marine Science, 9, Frontiers Media SA, 22 Feb. 2022, [Peer-reviewed], [Corresponding author], [International Magazine]
  English, Scientific journal, A remarkable early sea-ice reduction event was observed in the northern Bering Sea during 2018. In turn, this unusual hydrographic phenomenon affected several marine trophic levels, resulting in delayed phytoplankton blooms, phytoplankton community changes, and a northward shift of fish stocks. However, the response of the zooplankton community remains uncharacterized. Therefore, our study sought to investigate the zooplankton community shifts in the northern Bering Sea during the summers of 2017 and 2018 and evaluate the effects of early sea-ice melt events on the zooplankton community, population structure of large copepods, and copepod production. Five zooplankton communities were identified based on cluster analysis. Further, annual changes in the zooplankton community were identified in the Chirikov Basin. In 2017, the zooplankton community included abundant Pacific copepods transported by the Anadyr water. In 2018, however, the zooplankton community was dominated by small copepods and younger stages of large copepods (Calanus glacialis/marshallae and Metridia pacifica), which was likely caused by reproduction delays resulting from the early sea-ice reduction event. These environmental abnormalities increased copepod production; however, this higher zooplankton productivity did not efficiently reach the higher trophic levels. Taken together, our findings demonstrated that zooplankton community structure and production are highly sensitive to the environmental changes associated with early sea-ice reduction (e.g., warm temperatures and food availability)., 12074438

  
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• Vertical distribution of Limacina helicina larvae in the Pacific sector of the Arctic Ocean during autumn
  Nao Sato; Koki Tokuhiro; Kohei Matsuno
  Bull. Plankton Soc. Japan, 69, 1, 11, 17, Feb. 2022, [Peer-reviewed], [Last author, Corresponding author], [Domestic magazines]
  Japanese, Scientific journal, 13430032

  
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• Spatial distribution of the protist community in the southern part of the Okhotsk Sea off Hokkaido during summer
  Yusuke Hamao; Kohei Matsuno; Yoko Mitani; Atsushi Yamaguchi
  Journal of Oceanography, 78, 2, 89, 101, Springer Science and Business Media LLC, 27 Jan. 2022, [Peer-reviewed], [Domestic magazines]
  English, Scientific journal, The southern part of the Okhotsk Sea off Hokkaido has rich fishery resources supported by high primary production. The phytoplankton community has been described by several studies based on size-fractionated chlorophyll a concentration and primary production; however, the details of the species composition of nano- and micro-protist communities have not been well investigated. We evaluated the spatial distribution and relationship with hydrography of nano- and micro-protist communities in the southern region of the Okhotsk Sea off Hokkaido during the summer of 2019. Forty-two species of diatoms from 19 genera, dinoflagellates from 7 genera, tintinnid ciliates, oligotrich ciliates, and 1 genus of silicoflagellates were identified. Their spatial distribution showed distinct differences among the taxa. Cluster analysis based on the protist cell density identified six groups with geographically well-distinguished distributions. Diatom-dominant communities were distributed in the Cold Water Belt and Soya warm current along the coastal area of Hokkaido. Nanoflagellate-dominated communities were distributed in the offshore area. Some harmful species of diatoms (Pseudonitzschia pseudodelicatissima) and dinoflagellates (Alexandrium spp.) were dominant in the Cold Water Belt off Wakkanai. We suggest that the upwelling of cold water could increase the abundance of harmful species, with immanent negative impacts on marine ecosystems or fishery resources. In summary, the species composition and abundance of the summer protist community was strongly related to different water masses in the southern part of the Okhotsk Sea off Hokkaido., 32619277

  
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• Impact of Sea‐Ice Dynamics on the Spatial Distribution of Diatom Resting Stages in Sediments of the Pacific Arctic Region
  Yuri Fukai; Kohei Matsuno; Amane Fujiwara; Koji Suzuki; Mindy L. Richlen; Evangeline Fachon; Donald M. Anderson
  Journal of Geophysical Research: Oceans, 126, 7, American Geophysical Union (AGU), Jul. 2021, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
  English, Scientific journal
• Predation of Juvenile Japanese Sea Cucumber Apostichopus japonicus by Kelp Crab Pugettia ferox
  Nobuharu Inaba; Takuma Matsumoto; Hiroshi Kawai; Yuji Anaguchi; Kohei Matsuno
  Frontiers in Marine Science, 8, Frontiers Media SA, 22 Jun. 2021, [Peer-reviewed], [Last author], [International Magazine]
  English, Scientific journal, The predation of commercially important Japanese sea cucumber Apostichopus japonicus by the kelp crab Pugettia ferox, widely distributed in coastal northeast Asia, was examined in field sampling and laboratory experiments. The ossicles of A. japonicus were detected from the stomach contents of a natural population of P. ferox at the rate of 32.4% of 68 individuals collected within artificial intermediate sea cucumber reefs for releasing hatchery-produced juveniles in December 2018. In the following laboratory experiments, a high mortality rate (7.7 ± 2.4 individuals day^–1) of juvenile A. japonicus (15.35 ± 2.47 mm) was observed despite the different sizes and sex of P. ferox tested. It was also confirmed that a maximum of five sea cucumbers was killed and cut into small pieces within the first 2 h. Smaller and younger P. ferox individuals (adolescent) between carapace widths of 14.2–17.8 mm actively decorated themselves using pieces of chopped sea cucumber after feeding. Attached pieces of sea cucumber were observed to be fully eaten within a week, suggesting a possible strategy by P. ferox of short-term food storage as well as mimicry. This study demonstrates considerable evidence that predation mortality by sufficiently mobile P. ferox on commercially important A. japonicus can be significant, causing high mortality at the early life stage in the natural environment, especially in areas releasing hatchery-produced juveniles. It is also worth noting that the utilization of freshly chopped sea cucumbers as decoration material and food storage is a unique and novel ecological trait of P. ferox.
• An estimation of the quantitative impacts of copepod grazing on an under sea-ice spring phytoplankton bloom in western Baffin Bay, Canadian Arctic
  Makoto Sampei; Louis Fortier; Patrick Raimbault; Kohei Matsuno; Yoshiyuki Abe; Bernard Quéguiner; Augustin Lafond; Marcel Babin; Toru Hirawake
  Elementa: Science of the Anthropocene, 9, 1, 11 Jun. 2021, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
  English, Scientific journal
• Rapidly changing glaciers, ocean and coastal environments, and their impact on human society in the Qaanaaq region, northwestern Greenland
  Shin Sugiyama; Naoya Kanna; Daiki Sakakibara; Takuto Ando; Izumi Asaji; Ken Kondo; Yefan Wang; Yoshiki Fujishi; Shungo Fukumoto; Evgeniy Podolskiy; Yasushi Fukamachi; Minori Takahashi; Sumito Matoba; Yoshinori Iizuka; Ralf Greve; Masato Furuya; Kazutaka Tateyama; Tatsuya Watanabe; Shintaro Yamasaki; Atsushi Yamaguchi; Bungo Nishizawa; Kohei Matsuno; Daiki Nomura; Yuta Sakuragi; Yoshimasa Matsumura; Yoshihiko Ohashi; Teruo Aoki; Masashi Niwano; Naotaka Hayashi; Masahiro Minowa; Guillaume Jouvet; Eef van Dongen; Andreas Bauder; Martin Funk; Anders Anker Bjørk; Toku Oshima
  Polar Science, 27, 100632, 100632, Elsevier BV, Mar. 2021, [Peer-reviewed]
  English, Scientific journal
• Seasonal variability of the protist community and production in the southern Okhotsk Sea revealed by weekly monitoring
  Takuma Matsumoto; Kohei Matsuno; Seiji Katakura; Hiromi Kasai; Atsushi Yamaguchi
  Regional Studies in Marine Science, 43, 101683, 101683, Elsevier BV, Mar. 2021, [Peer-reviewed], [International Magazine]
  English, Scientific journal, 12074438;13430033
• Between-year comparison of interactions between environmental parameters and various plankton stocks in the northern Bering Sea during the summers of 2017 and 2018
  Atsushi Yamaguchi; Fumihiko Kimura; Yuri Fukai; Yoshiyuki Abe; Kohei Matsuno; Atsushi Ooki; Toru Hirawake
  Polar Science, 27, 100555, 100555, Mar. 2021, [Peer-reviewed], [International Magazine]
  English, Scientific journal, 12074438
• Seasonal changes in the zooplankton community and population structure in the northern Bering Sea from June to September, 2017
  Fumihiko Kimura; Yoshiyuki Abe; Kohei Matsuno; Russell R. Hopcroft; Atsushi Yamaguchi
  Deep Sea Research Part II: Topical Studies in Oceanography, 181-182, 104901, 104901, Elsevier BV, Dec. 2020, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
  English, Scientific journal
• Spatial changes in the summer diatom community of the northern Bering Sea in 2017 and 2018
  Yuri Fukai; Yoshiyuki Abe; Kohei Matsuno; Atsushi Yamaguchi
  Deep Sea Research Part II: Topical Studies in Oceanography, 181-182, 104903, 104903, Elsevier BV, Dec. 2020, [Peer-reviewed]
  English, Scientific journal
• Abundance, horizontal and vertical distribution of epipelagic ctenophores and scyphomedusae in the northern Bering Sea in summer 2017 and 2018: Quantification by underwater video imaging analysis
  Marie Maekakuchi; Kohei Matsuno; Jun Yamamoto; Yoshiyuki Abe; Atsushi Yamaguchi
  Deep Sea Research Part II: Topical Studies in Oceanography, 181-182, 104818, 104818, Elsevier BV, Dec. 2020, [Peer-reviewed]
  English, Scientific journal
• Distribution of harmful algal growth-limiting bacteria on artificially introduced Ulva and natural macroalgal beds
  Inaba, N; I. Kodama; S. Nagai; T. Shiraishi; K. Matsuno; A. Yamaguchi; I. Imai
  Applied Science, 10, 16, 5658, 5658, MDPI AG, Aug. 2020, [Peer-reviewed]
  English, Scientific journal, The intensity and frequency of harmful algal blooms (HABs) have increased, posing a threat to human seafood resources due to massive kills of cultured fish and toxin contamination of bivalves. In recent years, bacteria that inhibit the growth of HAB species were found to be densely populated on the biofilms of some macroalgal species, indicating the possible biological control of HABs by the artificial introduction of macroalgal beds. In this study, an artificially created Ulva pertusa bed using mobile floating cages and a natural macroalgal bed were studied to elucidate the distribution of algal growth-limiting bacteria (GLB). The density of GLB affecting fish-killing raphidophyte Chattonella antiqua, and two harmful dinoflagellates, were detected between 106 and 107 CFU g−1 wet weight on the biofilm of artificially introduced U. pertusa and 10 to 102 CFU mL−1 from adjacent seawater; however, GLB found from natural macroalgal species targeted all tested HAB species (five species), ranging between 105 and 106 CFU g−1 wet weight in density. These findings provide new ecological insights of GLB at macroalgal beds, and concurrently demonstrate the possible biological control of HABs by artificially introduced Ulva beds.
• Mass Occurrence of Pacific Copepods in the Southern Chukchi Sea During Summer: Implications of the High-Temperature Bering Summer Water
  Jee-Hoon Kim; Kyoung-Ho Cho; Hyoung Sul La; Eun Jung Choy; Kohei Matsuno; Sung-Ho Kang; Won Kim; Eun Jin Yang
  Frontiers in Marine Science, 7, Frontiers Media SA, 22 Jul. 2020, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
  English, Scientific journal

  
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• Review of spatial and inter-annual changes in the zooplankton community structure in the western Arctic Ocean during summers of 2008–2017
  Abe, Y; K. Matsuno; A. Fujiwara; A. Yamaguchi
  Progress in Oceanography, 186, 102391, 102391, Jun. 2020, [Peer-reviewed]
  English, Scientific journal
• Regional comparison of seasonal changes on copepod community structure in the Arctic Ocean
  Koki Tokuhiro; Yoshiyuki Abe; Jonaotaro Onodera; Makoto Sampei; Amane Fujiwara; Naomi Harada; Kohei Matsuno; Eva-Maria Nöthig; Atsushi Yamaguchi
  Polar Science, 24, 100509, 100509, Jun. 2020, [Peer-reviewed], ［Internationally co-authored］
  English, Scientific journal
• Impacts of meltwater discharge from marine-terminating glaciers on the protist community in Inglefield Bredning, northwestern Greenland
  K Matsuno; N Kanna; S Sugiyama; A Yamaguchi; EJ Yang
  Marine Ecology Progress Series, 642, 55, 65, Inter-Research Science Center, 28 May 2020, [Peer-reviewed], [Lead author, Corresponding author], ［Internationally co-authored］, [International Magazine]
  English, Scientific journal, To evaluate the effects of meltwater discharge from marine-terminating glaciers on a fjord protist community in northwestern Greenland during summer, we investigated the distribution, abundance and biomass of the protist community and their relationships with hydrographic parameters. In the standing stock of protists, dinoflagellates (46.4%) and oligotrich ciliates (39.5%) were dominant throughout the study region. With respect to vertical distribution, oligotrich ciliates were abundant in the surface layer, mainly due to suitable food conditions (abundance of diatom and nanoflagellates). Near glaciers, relatively high chlorophyll a (chl a) concentrations were found in the subsurface layers associated with the low-temperature, high-turbidity and slightly high nutrient levels, indicating that the nutrient inputs from the upwelling glacial meltwater plume increased primary production. Large-sized Protoperidium spp. were found only at stations near glaciers where nutrients were abundant, and heterotrophic dinoflagellates showed strong relationships with nanoflagellates. These findings suggest that the upwelling associated with subglacial meltwater discharge can stimulate nanoflagellate production, resulting in increases in ciliate and heterotrophic dinoflagellate production., 12074438
• Zooplankton community structure and dominant copepod population structure on the southern Kerguelen Plateau during summer 2016
  Kohei Matsuno; Jake R. Wallis; So Kawaguchi; Sophie Bestley; Kerrie M. Swadling
  Deep Sea Research Part II: Topical Studies in Oceanography, 174, 104788, 104788, Elsevier BV, Apr. 2020, [Peer-reviewed], [Lead author, Corresponding author], ［Internationally co-authored］, [International Magazine]
  English, Scientific journal, 11360089
• Different effects of mating group size as male and as female on sex allocation in a simultaneous hermaphrodite.
  Tamechika, M.M.; K. Matsuno; S. Wada; Y.Yusa
  Ecology and Evolution, 10, 5, 2492, 2498, Wiley, Feb. 2020, [Peer-reviewed]
  English, Scientific journal

  
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• The community composition of diatom resting stages in sediments of the northern Bering Sea in 2017 and 2018: the relationship to the interannual changes in the extent of the sea ice
  Fukai, Y; K. Matsuno; A. Fujiwara; A. Yamaguchi
  Polar Biology, 42, 1915, 1922, Oct. 2019, [Peer-reviewed]
  English, Scientific journal

  
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• Surface zooplankton size and taxonomic composition in Bowdoin Fjord, north-western Greenland: A comparison of ZooScan, OPC and microscopic analyses
  Naito⁠, A; Y. Abe; K. Matsuno; B. Nishizawa; N. Kanna; S. Sugiyama; A. Yamaguchi
  Polar Science, 19, 120, 129, Mar. 2019, [Peer-reviewed]
  English, Scientific journal

  
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• Yearly comparison of the planktonic chaetognath community in the Chukchi Sea in the summers of 1991 and 2007
  Amano, K; Y. Abe; K. Matsuno; A. Yamaguchi
  Polar Science, 19, 112, 119, Mar. 2019, [Peer-reviewed]
  English, Scientific journal

  
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• Seasonal phenology of four dominant copepods in the Pacific sector of the Arctic Ocean: Insights from statistical analyses of sediment trap data
  Tokuhiro, K; Y. Abe; K. Matsuno; J. Onodera; A. Fujiwara; N. Harada; T. Hirawake; A. Yamaguchi
  Polar Science, 19, 94, 111, Mar. 2019, [Peer-reviewed]
  English, Scientific journal

  
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• Impact of sea-ice reduction on the plankton community in the Pacific sector of the Arctic Ocean
  Matsuno Kohei
  Oceanography in Japan, 27, 6, 217, 230, Dec. 2018, [Peer-reviewed], [Invited], [Lead author, Corresponding author]
  Japanese, Scientific journal

  
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• Distribution of viable resting stage cells of diatoms in sediments and water columns of the Chukchi Sea, Arctic Ocean
  Tsukazaki, C; K.-I. Ishii; K. Matsuno; A. Yamaguchi; I. Imai
  Phycologia, 57, 440, 452, Jun. 2018, [Peer-reviewed]
  English, Scientific journal

  
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• Changes in phytoplankton community structure during wind-induced fall bloom on the central Chukchi shelf
  Amane Fujiwara; Shigeto Nishino; Kohei Matsuno; Jonaotaro Onodera; Yusuke Kawaguchi; Toru Hirawake; Koji Suzuki; Jun Inoue; Takashi Kikuchi
  Polar Biology, 41, 6, 1279, 1295, Springer Verlag, 01 Jun. 2018, [Peer-reviewed]
  English, Scientific journal

  
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• First record of the larvae of tanner crab Chionoecetes bairdi in the Chukchi Sea: A future northward expansion in the Arctic?
  Jose M. Landeira; Kohei Matsuno; Yuji Tanaka; Atsushi Yamaguchi
  Polar Science, 16, 86, 89, Jun. 2018, [Peer-reviewed]
  English, Scientific journal

  
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• Seasonal variability of zooplankton size spectra at Mombetsu Harbour in the southern Okhotsk Sea during 2011: An analysis using an optical plankton counter
  Hikaru Hikichi; Daichi Arima; Yoshiyuki Abe; Kohei Matsuno; Soshi Hamaoka; Seiji Katakura; Hiromi Kasai; Atsushi Yamaguchi
  Regional Studies in Marine Science, 20, 34, 44, Elsevier B.V., 01 Apr. 2018, [Peer-reviewed]
  English, Scientific journal

  
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• Evidence of increased toxic Alexandrium tamarense dinoflagellate blooms in the eastern Bering Sea in the summers of 2004 and 2005
  Masafumi Natsuike; Rui Saito; Amane Fujiwara; Kohei Matsuno; Atsushi Yamaguchi; Naonobu Shiga; Toru Hirawake; Takashi Kikuchi; Shigeto Nishino; Ichiro Imai
  PLOS ONE, 12, 11, e0188565, Nov. 2017, [Peer-reviewed]
  English, Scientific journal
• Abundance, development stage, and size of decapod larvae through the Bering and Chukchi Seas during summer
  Jose M. Landeira; Kohei Matsuno; Atsushi Yamaguchi; Toru Hirawake; Takashi Kikuchi
  POLAR BIOLOGY, 40, 9, 1805, 1819, Sep. 2017, [Peer-reviewed]
  English, Scientific journal

  
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• The physiological adaptations and toxin profiles of the toxic Alexandrium fundyense on the eastern Bering Sea and Chukchi Sea shelves
  Masafumi Natsuike; Hiroshi Oikawa; Kohei Matsuno; Atsushi Yamaguchi; Ichiro Imai
  HARMFUL ALGAE, 63, 13, 22, Mar. 2017, [Peer-reviewed]
  English, Scientific journal

  
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• Length-weight Relationships and Chemical Composition of the Dominant Mesozooplankton Taxa/species in the Subarctic Pacific, with Special Reference to the Effect of Lipid Accumulation in Copepoda
  Asami Nakamura; Kohei Matsuno; Yoshiyuki Abe; Hiroshi Shimada; Atsushi Yamaguchi
  ZOOLOGICAL STUDIES, 56, 13, 2017, [Peer-reviewed]
  English, Scientific journal
• Latitudinal variations in the abundance, biomass, taxonomic composition and estimated production of epipelagic mesozooplankton along the 155 degrees E longitude in the western North Pacific during spring
  A. Yamaguchi; K. Matsuno; Y. Abe; D. Arima; I. Imai
  PROGRESS IN OCEANOGRAPHY, 150, 13, 19, Jan. 2017, [Peer-reviewed]
  English, Scientific journal

  
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• 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; Yutaka Watanuki
  BIOGEOSCIENCES, 14, 1, 203, 214, Jan. 2017, [Peer-reviewed]
  English, Scientific journal

  
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• Possible spreading of toxic Alexandrium tamarense blooms on the Chukchi Sea shelf with the inflow of Pacific summer water due to climatic warming
  Masafumi Natsuike; Kohei Matsuno; Toru Hirawake; Atsushi Yamaguchi; Shigeto Nishino; Ichiro Imai
  HARMFUL ALGAE, 61, 80, 86, Jan. 2017, [Peer-reviewed]
  English, Scientific journal

  
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• Regional patterns and controlling factors on summer population structure of Calanus glacialis in the western Arctic Ocean
  Kohei Matsuno; Yoshiyuki Abe; Atsushi Yamaguchi; Takashi Kikuchi
  POLAR SCIENCE, 10, 4, 503, 510, Dec. 2016, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal

  
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• Comparative ecology of three dominant pelagic chaetognaths (Eukrohnia hamata, Parasagitta elegans, Pseudosagitta scrippsae) in the Oyashio region during the spring phytoplankton bloom
  Yoshiyuki Abe; Hiroomi Miyamoto; Rui Saito; Kohei Matsuno; Atsushi Yamaguchi; Ichiro Imai
  REGIONAL STUDIES IN MARINE SCIENCE, 8, 122, 132, Nov. 2016, [Peer-reviewed]
  English, Scientific journal

  
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• Spatial and geographical changes in the mesozooplankton community in the Bering and Chukchi Seas during the summers of 2007 and 2008
  Kohei Matsuno; Jose M. Landeira Sanchez; Atsushi Yamaguchi; Toru Hirawake; Takashi Kikuchi
  POLAR SCIENCE, 10, 3, 335, 345, Sep. 2016, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal

  
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• 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; Takashi Kikuchi
  BIOGEOSCIENCES, 13, 15, 4555, 4567, Aug. 2016, [Peer-reviewed]
  English, Scientific journal

  
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• Diets and body condition of polar cod (Boreogadus saida) in the northern Bering Sea and Chukchi Sea
  Tsubasa Nakano; Kohei Matsuno; Bungo Nishizawa; Yuka Iwahara; Yoko Mitani; Jun Yamamoto; Yasunori Sakurai; Yutaka Watanuki
  POLAR BIOLOGY, 39, 6, 1081, 1086, Jun. 2016, [Peer-reviewed]
  English, Scientific journal

  
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• Two new living Entactinaria (Radiolaria) species from the Arctic province: Joergensenium arcticum n. sp and Joergensenium clevei n. sp.
  Takahito Ikenoue; Kjell R. Bjorklund; Paulian Dumitrica; Anders K. Krabberod; Katsunori Kimoto; Kohei Matsuno; Naomi Harada
  MARINE MICROPALEONTOLOGY, 124, 75, 94, Apr. 2016, [Peer-reviewed]
  English, Scientific journal

  
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• Short-term changes in abundance and population structure of dominant pelagic amphipod species in the Oyashio region during the spring phytoplankton bloom
  Yoshiyuki Abe; Yuichiro Yamada; Rui Saito; Kohei Matsuno; Atsushi Yamaguchi; Kosei Komatsu; Ichiro Imai
  REGIONAL STUDIES IN MARINE SCIENCE, 3, 154, 162, Jan. 2016, [Peer-reviewed]
  English, Scientific journal

  
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• 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; Takashi Kikuchi
  BIOGEOSCIENCES, 13, 4, 913, 923, 2016, [Peer-reviewed]
  English, Scientific journal

  
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• SEASONAL AND INTER-SPECIES COMPARISON OF ASYMMETRY IN THE GENITAL SYSTEM OF SOME SPECIES OF THE OCEANIC COPEPOD GENUS METRIDIA (COPEPODA, CALANOIDA)
  Daichi Arima; Kohei Matsuno; Atsushi Yamaguchi; Takahiro Nobetsu; Ichiro Imai
  CRUSTACEANA, 88, 12-14, 1307, 1321, Dec. 2015, [Peer-reviewed]
  English, Scientific journal

  
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• Long-Term Changes in Summer Zooplankton Communities of the Western Chukchi Sea, 1945-2012
  Elizaveta A. Ershova; Russell R. Hopcroft; Ksenia N. Kosobokova; Kohei Matsuno; R. John Nelson; Atsushi Yamaguchi; Lisa B. Eisner
  OCEANOGRAPHY, 28, 3, 100, 115, Nov. 2015, [Peer-reviewed], ［Internationally co-authored］
  English, Scientific journal
• Seasonal changes in the population structure of dominant planktonic copepods collected using a sediment trap moored in the western Arctic Ocean
  Kohei Matsuno; Atsushi Yamaguchi; Amane Fujiwara; Jonaotaro Onodera; Eiji Watanabe; Naomi Harada; Takashi Kikuchi
  JOURNAL OF NATURAL HISTORY, 49, 45-48, 2711, 2726, Oct. 2015, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
  English, Scientific journal

  
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• Enhanced role of eddies in the Arctic marine biological pump (vol 5, 3950, 2014)
  Eiji Watanabe; Jonaotaro Onodera; Naomi Harada; Makio C. Honda; Katsunori Kimoto; Takashi Kikuchi; Shigeto Nishino; Kohei Matsuno; Atsushi Yamaguchi; Akio Ishida; Michio J. Kishi
  NATURE COMMUNICATIONS, 6, 8441, Sep. 2015, [Peer-reviewed]
  English
• 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; T. Kikuchi
  BIOGEOSCIENCES, 12, 13, 4005, 4015, Jul. 2015, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal

  
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• Reproductive success of Pacific copepods in the Arctic Ocean and the possibility of changes in the Arctic ecosystem
  Kohei Matsuno; Atsushi Yamaguchi; Toru Hirawake; Shigeto Nishino; Jun Inoue; Takashi Kikuchi
  POLAR BIOLOGY, 38, 7, 1075, 1079, Jul. 2015, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal

  
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• Spatial and temporal changes in zooplankton abundance, biovolume, and size spectra in the neighboring waters of Japan: analyses using an optical plankton counter
  Kaede Sato; Kohei Matsuno; Daichi Arima; Yoshiyuki Abe; Atsushi Yamaguchi
  ZOOLOGICAL STUDIES, 54, 18, Jan. 2015, [Peer-reviewed]
  English, Scientific journal

  
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• Spatial changes in the vertical distribution of calanoid copepods down to great depths in the North Pacific
  Atsushi Yamaguchi; Kohei Matsuno; Tomoe Homma
  ZOOLOGICAL STUDIES, 54, 13, Jan. 2015, [Peer-reviewed]
  English, Scientific journal

  
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• Seasonal changes in zooplankton abundance, biomass, size structure and dominant copepods in the Oyashio region analysed by an optical plankton counter
  Atsushi Yamaguchi; Kohei Matsuno; Yoshiyuki Abe; Daichi Arima; Kohei Ohgi
  DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, 91, 115, 124, Sep. 2014, [Peer-reviewed]
  English, Scientific journal

  
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• Horizontal distribution of microprotist community structure in the western Arctic Ocean during late summer and early fall of 2010
  Kohei Matsuno; Mutsuo Ichinomiya; Atsushi Yamaguchi; Ichiro Imai; Takashi Kikuchi
  POLAR BIOLOGY, 37, 8, 1185, 1195, Aug. 2014, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal

  
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• Enhanced role of eddies in the Arctic marine biological pump
  Eiji Watanabe; Jonaotaro Onodera; Naomi Harada; Makio C. Honda; Katsunori Kimoto; Takashi Kikuchi; Shigeto Nishino; Kohei Matsuno; Atsushi Yamaguchi; Akio Ishida; Michio J. Kishi
  NATURE COMMUNICATIONS, 5, doi: 10.1038/ncomms4950, May 2014, [Peer-reviewed]
  English, Scientific journal

  
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• Seasonal changes in mesozooplankton swimmers collected by sediment trap moored at a single station on the Northwind Abyssal Plain in the western Arctic Ocean
  Kohei Matsuno; Atsushi Yamaguchi; Amane Fujiwara; Jonaotaro Onodera; Eiji Watanabe; Ichiro Imai; Sanae Chiba; Naomi Harada; Takashi Kikuchi
  JOURNAL OF PLANKTON RESEARCH, 36, 2, 490, 502, Mar. 2014, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal

  
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• SEASONAL CHANGES IN BODY SIZE AND OIL SAC VOLUME OF THREE PLANKTONIC COPEPODS, PARACALANUS PARVUS (CLAUS, 1863), PSEUDOCALANUS NEWMANI FROST, 1989 AND OITHONA SIMILIS CLAUS, 1866, IN A TEMPERATE EMBAYMENT: WHAT CONTROLS THEIR SEASONALITY?
  Daichi Arima; Atsushi Yamaguchi; Yoshiyuki Abe; Kohei Matsuno; Rui Saito; Hiroki Asami; Hiroshi Shimada; Ichiro Imai
  CRUSTACEANA, 87, 3, 364, 375, Mar. 2014, [Peer-reviewed]
  English, Scientific journal

  
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• Variation in assimilation efficiencies of dominant Neocalanus and Eucalanus copepods in the subarctic Pacific: Consequences for population structure models
  Yoshiyuki Abe; Masafumi Natsuike; Kohei Matsuno; Takeshi Terui; Atsushi Yamaguchi; Ichiro Imai
  JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY, 449, 321, 329, Nov. 2013, [Peer-reviewed]
  English, Scientific journal

  
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• Distribution of viable diatom resting stage cells in bottom sediments of the eastern Bering Sea shelf
  Chiko Tsukazaki; Ken-Ichiro Ishii; Rui Saito; Kohei Matsuno; Atsushi Yamaguchi; Ichiro Imai
  DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 94, 22, 30, Oct. 2013, [Peer-reviewed]
  English, Scientific journal

  
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• Interannual changes in the zooplankton community structure on the southeastern Bering Sea shelf during summers of 1994-2009
  Rie Ohashi; Atsushi Yamaguchi; Kohei Matsuno; Rui Saito; Nao Yamada; Anai Iijima; Naonobu Shiga; Ichiro Imai
  DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 94, 44, 56, Oct. 2013, [Peer-reviewed]
  English, Scientific journal

  
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• East-west differences in population structure and vertical distribution of copepods along 47°N in the subarctic Pacific in June 2009
  Atsushi Yamaguchi; Tomoe Homma; Rui Saito; Kohei Matsuno; Hiromichi Ueno; Toru Hirawake; Ichiro Imai
  Plankton and Benthos Research, 8, 3, 116, 123, Plankton Society of Japan, Aug. 2013, [Peer-reviewed]
  English, Scientific journal

  
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• Abundance and distribution of toxic Alexarzdrium tamarense resting cysts in the sediments of the Chukchi Sea and the eastern Bering Sea
  Masafumi Natsuike; Satoshi Nagai; Kohei Matsuno; Rui Saito; Chiko Tsukazaki; Atsushi Yamaguchi; Ichiro Imai
  HARMFUL ALGAE, 27, 52, 59, Jul. 2013, [Peer-reviewed]
  English, Scientific journal

  
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• LIFE HISTORY AND PRODUCTION OF PELAGIC MYSIDS AND DECAPODS IN THE OYASHIO REGION, JAPAN
  Kana Chikugo; Atsushi Yamaguchi; Kohei Matsuno; Rui Saito; Ichiro Imai
  CRUSTACEANA, 86, 4, 449, 474, Apr. 2013, [Peer-reviewed]
  English, Scientific journal

  
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• Biomass size spectra of mesozooplankton in the Chukchi Sea during the summers of 1991/1992 and 2007/2008: an analysis using optical plankton counter data
  Kohei Matsuno; Atsushi Yamaguchi; Ichiro Imai
  ICES JOURNAL OF MARINE SCIENCE, 69, 7, 1205, 1217, Sep. 2012, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal

  
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• Horizontal distribution of calanoid copepods in the western Arctic Ocean during the summer of 2008
  Kohei Matsuno; Atsushi Yamaguchi; Koji Shimada; Ichiro Imai
  POLAR SCIENCE, 6, 1, 105, 119, Apr. 2012, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal

  
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• Interannual And Latitudinal Changes in Zooplankton Abundance, Biomass and Size Composition Along a Central North Pacific Transect During Summer: Analyses with an Optical Plankton Counter
  Jumpei Fukuda; Atsushi Yamaguchi; Kohei Matsuno; Ichiro Imai
  Plankton and Benthos Research, 7, 2, 64, 74, 2012, [Peer-reviewed]
  English, Scientific journal

  
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• Year-to-year changes of the mesozooplankton community in the Chukchi Sea during summers of 1991, 1992 and 2007, 2008
  Kohei Matsuno; Atsushi Yamaguchi; Toru Hirawake; Ichiro Imai
  POLAR BIOLOGY, 34, 9, 1349, 1360, Sep. 2011, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal

  
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• Abundance and biomass of mesozooplankton along north-south transects (165°E and 165°W) in summer in the North Pacific: An analysis with an optical plankton counter
  Kohei Matsuno; Atsushi Yamaguchi
  Plankton and Benthos Research, 5, 4, 123, 130, 2010, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal

  
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• Causes of Under- or Overestimation of Zooplankton Biomass Using Optical Plankton Counter (OPC): Effect of Size and Taxa
  Kohei Matsuno; Hye Seon Kim; Atsushi Yamaguchi
  Plankton and Benthos Research, 4, 4, 154, 159, 2009, [Peer-reviewed], [Lead author, Corresponding author], [Domestic magazines]
  English, Scientific journal

  
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• 春季の道東はるか沖海盆縁辺部亜表層におけるスケトウダラの大量出現
  山村織生; 松野孝平; 大和田真紀; 亀井佳彦, 日本水産学会大会講演要旨集(CD-ROM), 2023, 2023
• Study on characteristics of zooplankton community in coastal water around Mombetsu during sea ice season
  KASAI Hiromi; KATAKURA Seiji; YAMAZAKI Tomoyasu; KIMOTO Katsunori; HIRAI Junya; MATSUNO Kohei; YAMAGUCHI Atsushi, Proceedings of the International Symposium on Okhotsk Sea & Polar Oceans, 36th, 2022
• Seasonal changes in phytoplankton community at Suttu in Hokkaido
  濱尾優介; 松野孝平; 松野孝平; 山崎友資; 脇田昌英, 日本ベントス学会・日本プランクトン学会合同大会講演要旨集, 2022, 2022
• 北海道渡島大沼および小沼における植物プランクトンの季節的変動
  小林淳希; 宮下洋平; 大洞裕貴; 織田さやか; 田中邦明; 松野孝平; 山口篤; 今井一郎, 北海道大学水産科学研究紀要, 60, 1, 33, 67, Dec. 2021
  Japanese, Report research institution
• North-south changes of zooplankton community and copepods population along the 110°E line in the Indian sector of the Southern Ocean during the austral summer
  Sugioka, R; K. Matsuno; K.D. Takahashi; R. Makabe; K. Takahashi; M. Moteki; T. Odate; A. Yamaguchi, Bulletin of Fisheries Sciences, Hokkaido University, 71, 1, 39, 50, Aug. 2021
  English
• Inter-specific differences in the feeding modes of the large Arctic copepods
  徳弘航季; 松野孝平; 仲村康秀; 米田壮汰; 角谷浩平; 辻彰洋; 安藤靖浩; 山口篤, 日本ベントス学会・日本プランクトン学会合同大会講演要旨集, 2021, 2021
• Standing stocks and taxonomic accounts of the whole plankton community, mass occurrence of fecal pellets, and estimation of vertical material flux via fecal pellets in the southern Okhotsk Sea during early summer
  小嶋大己; 濱尾優介; 飴井佳南子; 深井佑多佳; 松野孝平; 三谷曜子; 山口篤, 日本ベントス学会・日本プランクトン学会合同大会講演要旨集, 2021, 2021
• Comparison of the vertical distribution of pelagic copepod abundance, biomass and community structure between the Atlantic and Pacific sectors of the Arctic Ocean.
  Abe, Y; N. Hildebrandt; K. Matsuno; B. Niehoff; A. Yamaguchi, Bulletin of Fisheries Sciences, Hokkaido University, 70, 1, 91, 102, Aug. 2020
  English, Report research institution
• Vertical distribution, community structure, and active carbon flux of two Macrozooplankton taxa: Amphipods and Euphausiids in the summer of the western North Pacific
  Hanamiya, Y; H. Murase; K. Matsuno; A. Yamaguchi, Bulletin of Fisheries Sciences, Hokkaido University, 70, 1, 77, 89, Aug. 2020
  English, Report research institution
• 稚ナマコの餌料環境についての検討
  稲葉信晴; 松本卓真; 梶原瑠美子; 松野孝平, 寒地土木研究所月報, 802, 71, 75, Mar. 2020
  Japanese, Report research institution
• オホーツク海南岸における海洋酸性化モニタリングと生物影響調査
  木元克典; 下島公紀; 清水啓介; 脇田昌英; 山口篤; 松野孝平; 村井克詞; 吉田瞳; 片倉靖次, 日本海洋学会大会講演要旨集(Web), 2020, 2020
• Ingestion rates and grazing impacts of Arctic and Pacific copepods in the western Arctic Ocean during autumn
  Matsuno, K; A. Fujiwara; T. Hirawake; A. Yamaguchi, Bulletin of Fisheries Sciences, Hokkaido University, 69, 2, 93, 102, Dec. 2019, [Lead author, Corresponding author]
  English, Report research institution

  
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• Study on Effect of Net Mesh Size on Filtering Efficiency and Zooplankton Sampling Efficiency using Quad-NORPAC Net
  Hama, N; Y. Abe; K. Matsuno; A. Yamaguchi, Bulletin of Fisheries Sciences, Hokkaido University, 69, 1, 47, 56, Sep. 2019
  Japanese, Report research institution

  
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• Zooplankton Size Structure in the Summer Western North Pacific Ocean : Analysis by Optical Plankton Counter
  Mishima, K; K. Matsuno; A. Yamaguchi, Bulletin of Fisheries Sciences, Hokkaido University, 69, 1, 37, 45, Aug. 2019
  Japanese, Report research institution

  
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• Horizontal and vertical distribution of the appendicularian community and population structure in the Bering and Chukchi Seas during the summer of 2007
  Maekakuchi, Marie; Abe, Yoshiyuki; Matsuno, Kohei; Hirawake, Toru; Yamaguchi, Atsushi, Bulletin of Fisheries Sciences, Hokkaido University, 68, 3, 43, 49, Dec. 2018
  English, Report research institution

  
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• Plankton sampling by the training vessel Umitaka-maru in the Indian sector of the Southern Ocean in the austral summer of 2017
  Sakurai H; Moteki M; Mizobata K; Shimada K; Matsuno K; Okubo Y; Sano M; Nirazuka S; Yamamoto N; Takao S; Makabe R; Takahashi KT; Odate T, JARE DATA REPORTS (Marine Biology), 64, 1, 13, Feb. 2018
  English, Report research institution
• Inter-oceanic differences in macrozooplankton biomass and community structure in four regions around Hokkaido Island, Japan: consequences for marine ecosystem structure
  Tomiyama, K; K. Matsuno; Y. Abe; H. Shimada; A. Yamaguchi, Bulletin of Fisheries Sciences, Hokkaido University, 67, 2, 25, 34, Aug. 2017
  Inter-oceanic differences in macrozooplankton(euphausiids, amphipods, cnidarians and chaetognaths) biomass and community structure were studied in four regions(northern Japan Sea, southern Okhotsk Sea, Donan and Doto areas of North Pacific) around Hokkaido Island. Whole zooplankton biomass ranged between 25 and 315 g WM m-2 and was significantly higher in the southern Okhotsk Sea. Macrozooplankton composed 5-15% of the whole zooplankton biomass. Across all macrozooplankton taxa, the number of species varied with region : the fewest species(2-4 species) were in the southern Okhotsk Sea, followed by the northern Japan Sea(3-5 species), and the most species(4-9 species) were in the Donan and Doto areas of the North Pacific. Depth topography and thermal conditions are considered possible causes of the differences in species richness across regions. Through inter-oceanic comparison, marine ecosystem characteristics of each region were evaluated. The zooplankton community in the northern Japan Sea was characterized by a predominance of carnivorous macrozooplankton taxa(amphipods, cnidarians and chaetognaths) and fewer herbivorous taxa(euphausiids and mesozooplankton), and it was determined to be as a top-down controlled ecosystem. In contrast, in the southern Okhotsk Sea, the zooplankton community was predominated by herbivorous mesozooplankton and euphausiids, and the marine ecosystem was determined to be a bottom-up control region. In the North Pacific, zooplankton community in the Doto area was predominated by chaetognaths. The zooplankton community in the Donan area showed mixed characteristics of the Doto area and the northern Japan Sea because of the seasonal water mass exchange from these two regions., 北海道大学大学院水産科学研究院, English, Report research institution
• 北極海における有殻翼足類の脆弱性と頑健性:天然海水を用いた船上飼育実験の結果
  木元克典; 小野寺丈尚太郎; 西野茂人; 原田尚美; 池上隆仁; 松野孝平; 佐々木理, 日本ベントス学会・日本プランクトン学会合同大会講演要旨集, 2016, 52, 07 Sep. 2016
  Japanese
• Seasonal changes in mesozooplankton swimmer community and fecal pellets collected by sediment trap moored at the Northwind Abyssal Plain in the western Arctic Ocean
  Matsuno, K; A. Yamaguchi; A. Fujiwara; J. Onodera; E. Watanabe; N. Harada; T. Kikuchi, Bulletin of Fisheries Sciences, Hokkaido University, 66, 2, 77, 85, Aug. 2016, [Lead author, Corresponding author]
  In the western Arctic Ocean, the long sea ice coverage period prevents year-round seasonal zooplankton sampling by ordinary ship-board observation. To overcome these problems, the analysis of zooplankton swimmers in samples collected by a year-round moored sediment trap may be a powerful tool. In this study, we studied seasonal changes in zooplankton swimmer community and fecal pellets collected by a sediment trap moored at fixed depths(180-260m) of the Northwind Abyssal Plain in the western Arctic Ocean from October 2010 to September 2012. The fecal pellets were separated into four types : oval, cylinder, spherical and brown-colored pellets. The occurrence of brown-colored pellets was limited to the open water period(July-August) and reached 80% of the total at that time. Ship-board experiments showed that the brown-colored fecal pellets were egested by amphipods(Themisto libellula). The high occurrence of brown-colored fecal pellets during the open water period might be a reflection of the massive feeding activity of amphipods. Zooplankton swimmer flux ranged from 35-739 ind m-2 day-1, and poecilostomatoid copepods were the most abundant(accounted for 69% of the annual mean). Seasonally, barnacle and bivalve larvae were abundant during August-September and August-November, respectively. These meroplanktionic larvae were considered to be transported by current flow from the southern continental shelf, whereas they were absent from summer to autumn 2012. The annual changes in meroplanktonic larvae occurrence would be a reflection of the annual changes in water mass formation at the upper layer of the sediment trap moored station., 北海道大学大学院水産科学研究院, English, Report research institution

  
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• The Spatial and Vertical Distributions of a Spring Phytoplankton Community along 155˚E in the Western North Pacific: An In Situ Multi-Excitation Fluorometer Analysis
  Kentaro Matsumoto; Daichi Arima; Kohei Matsuno; Yasuhiro Yamasaki; Hiroji Onishi; Atsushi Ooki; Toru Hirawake; Atsushi Yamaguchi; Ichiro Imai, 北海道大学水産科学研究彙報, 66, 1, 29, 38, Mar. 2016
  The spring phytoplankton community in the western North Pacific is characterized by large variability in both the horizontal and verical dimensions. To evaluate this variability, phytoplankton communitiesat 39°30'N-44°00'N along 155°E were investigated in situ using a multi-excitation fluorometer during May 2014. The sea surface chlorophyll a(Chi. a) level was high and composed mainly of diatoms near 43°30'N-42'N, while it was low and composed of dinoflagellates south of 40°N. Based on seven fixed-station investigations, the phytoplanklton communities were classified into 4 types : a low Chl. a level before bloom (44°N), massive diatom bloom(42°N-43°N), low Chl. a level with dinoflagellates(40°N-41°N) and lowest Chl.a(at the southernmost station at 39°30'N). These phytoplankton communities corresponded with the formation of a water mass separating the Subartctic front(SAF) and Subarctic boundary(SAB). Multi-excitation fluorometry data showed a high correlation with Chl. a measurements obtained via Thrmo-salinometer and biovolume microscopic analyses(r²=0.67-0.97,p<0.05). Thus, we concluded that a multi-excitation fluorometer can be applied for the evaluation of detailed spatial and temporal changes in the phytoplankton community at various locations., 北海道大学大学院水産科学研究院, Japanese, Report research institution

  
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• 秋季チャクチ海におけるマイクロプランクトン群集の短期変動
  横井直弥; 松野孝平; 一宮睦雄; 山口篤; 西野茂人; 小野寺丈尚太郎; 猪上淳; 菊地隆, 日本ベントス学会・日本プランクトン学会合同大会講演要旨集, 2015, 165, 03 Sep. 2015
  Japanese
• 夏季のベーリング海からチャクチ海における十脚類幼生の水平・地理分布
  LANDEIRA SANCHEZ Jose M; LANDEIRA SANCHEZ Jose M; 松野孝平; 山口篤; 平譯享; 菊地隆, 日本ベントス学会・日本プランクトン学会合同大会講演要旨集, 2015, 154, 03 Sep. 2015
  Japanese
• 西部北太平洋155°E線に沿った春季植物プランクトン群集の水平および鉛直分布
  松本健太郎; 有馬大地; 松野孝平; 山崎康裕; 大木淳之; 平譯享; 山口篤; 今井一郎, 日本ベントス学会・日本プランクトン学会合同大会講演要旨集, 2015, 167, 03 Sep. 2015
  Japanese
• 北極海の海氷激減―生物生産および物質循環へのインパクト―
  原田尚美; 小野寺丈尚太郎; 渡邉英嗣; 木元克典; 菊地隆; 松野孝平; 山口篤; 佐藤真奈美; 白岩善博; 岸道郎; 田中裕一郎, 日本海洋学会大会講演要旨集, 2015, 117, Mar. 2015
  Japanese
• 北極海に生息する有殻翼足類ミジンウキマイマイ(Limacina helicina)の簡易飼育実験と殻溶解過程
  木元克典; 小野寺丈尚太郎; 池上隆仁; 松野孝平; 佐々木理; 鹿納晴尚, 日本海洋学会大会講演要旨集, 2015, 126, Mar. 2015
  Japanese
• 秋季チャクチ海におけるマイクロプランクトン群集の短期変動
  横井直弥; 松野孝平; 一宮睦雄; 山口篤; 西野茂人; 小野寺丈尚太郎; 猪上淳; 菊地隆, 日本海洋学会大会講演要旨集, 2015, 122, Mar. 2015
  Japanese
• チャクチ海におけるカイアシ類の空間分布に影響を及ぼす海洋環境要因
  佐々木裕子; 松野孝平; 大額実咲; 上野洋路; 和賀久朋; 山口篤; 平譯享; 綿貫豊, 日本海洋学会大会講演要旨集, 2015, 124, Mar. 2015
  Japanese
• 北極海に生息する有殻翼足類ミジンウキマイマイ(Limacina helicina)の現場飼育実験
  木元克典; 小野寺丈尚太郎; 池上隆仁; 松野孝平, ブルーアース要旨集, 2015, 71, 2015
  Japanese
• Short-term changes in the population structure of hydromedusa Aglantha digitale during the spring phytoplankton bloom in the Oyashio region.
  Abe, Yoshiyuki; Yamaguchi, Atsushi; Matsuno, Kohei; Kono, Tokihiro; Imai, Ichiro, Bulletin of Fisheries Sciences, Hokkaido University, 64, 3, 71, 81, Dec. 2014
  English, Report research institution

  
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• Spatial and temporal changes in the plankton community in the western Arctic Ocean
  Matsuno Kohei, Memoirs of the Faculty of Fisheries Sciences, Hokkaido University, 56, 2, 65, 107, Dec. 2014, [Lead author, Corresponding author]
  Faculty of Fisheries Sciences, Hokkaido University, English, Report research institution

  
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• ベーリング海北部・チュクチ海におけるコククジラの分布要因
  岩原由佳; 関口圭子; 松野孝平; 中野翼; 西沢文吾; 鵜山貴司; 山口篤; 綿貫豊; 宮下和士; 三谷曜子, 日本水産学会大会講演要旨集, 2014, 107, 27 Mar. 2014
  Japanese
• 西部北太平洋親潮域の春季ブルーム期におけるヒドロクラゲ類Aglantha digitaleの個体群構造の短期変動
  阿部義之; 山口篤; 河野時廣; 松野孝平; 今井一郎, 日本海洋学会大会講演要旨集, 2014, 130, 10 Mar. 2014
  Japanese
• 知床羅臼深層水により採集された動物プランクトン群集の季節変化:優占カイアシ類Metridia属2種の個体群構造
  有馬大地; 山口篤; 阿部義之; 松野孝平; 野別貴博; 今井一郎, 日本海洋学会大会講演要旨集, 2014, 190, 10 Mar. 2014
  Japanese
• 西部北極海ノースウィンド海底平原における動物プランクトン群集の季節変動 I:全動物プランクトンと糞粒
  松野孝平; 山口篤; 藤原周; 小野寺丈尚太郎; 渡邉英嗣; 原田尚美; 菊地隆, 日本海洋学会大会講演要旨集, 2014, 191, 10 Mar. 2014
  Japanese
• 西部北極海ノースウィンド海底平原における動物プランクトン群集の季節変動 II:主要カイアシ類の個体群構造
  松野孝平; 山口篤; 藤原周; 小野寺丈尚太郎; 渡邉英嗣; 原田尚美; 菊池隆, 日本海洋学会大会講演要旨集, 2014, 192, 10 Mar. 2014
  Japanese
• Seasonal changes in zooplankton community structure in Ishikari Bay, Japan Sea
  Arima, Daichi; Yamaguchi, Atsushi; Abe, Yoshiyuki; Matsuno, Kohei; Saito, Rui; Asami, Hiroki; Shimada, Hiroshi; Imai, Ichiro, Bulletin of Fisheries Sciences, Hokkaido University, 64, 1, 17, 23, Mar. 2014
  Seasonal changes in the zooplankton community in Ishikari Bay, northern Japan Sea were studied based on monthly samplescollected by vertical hauls of a 100 μm mesh NORPAC net from March 2001 to May 2002. Zooplankton abundancepeaked in May and was mainly composed of copepodid stages of copepods. Cluster analysis of copepod abundance separatedthe community into two main groups : group A was observed from January to June (winter and spring) and group B from July toDecember (summer and autumn). Groups A and B were composed of cold and warm water species, respectively. Speciesdiversity was high for group B. As the second dominant taxa, copepod nauplii dominated during winter and spring, whereasmolluscs and appendicularians were abundant during summer and autumn. Copepod nauplii in winter and spring likely reflectthe copepod reproduction initiated by spring the phytoplankton bloom. Molluscs in summer and autumn were composed ofplanktonic larvae of benthos (=meroplankton). Appendicularians during summer and autumn are oceanic and considered tohave been transported by the Tsushima warm current. High copepod species diversity during summer and autumn might alsobe related to the Tsushima warm current., 北海道大学大学院水産科学研究院, English, Report research institution

  
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• チャクチ海における動物プランクトン密度の空間変化に影響を及ぼす海洋環境要因
  佐々木裕子; 松野孝平; 和賀久朋; 大額実咲; 山口篤; 上野洋路; 平譯享; 綿貫豊, 極域科学シンポジウム講演予稿集(CD-ROM), 5th, ROMBUNNO.IAP45, 2014
  Japanese
• Spatial changes in mesozooplankton community structure in the North Pacific: Analysis by optical plankton counter
  Shiota, T; Y. Abe; R. Saito; K. Matsuno; A. Yamaguchi; I. Imai, Bulletin of Fisheries Sciences, Hokkaido University, 63, 3, 13, 22, Dec. 2013
  海洋生態系において，動物プランクトンのサイズ毎の現存量を把握することは，動物プランクトンのサイズ組成が，魚類仔稚魚の餌選択性，成長および生残に影響を与えること，また鉛直的な有機物輸送量を決定することから，水産学および海洋学いずれの視点においても重要である。動物プランクトンサイズ組成に関する情報はその重要性にも関わらず，特にその時空間変動に関する知見は乏しいのが現状である。その理由として，従来の顕微鏡による解析には多大な労力，膨大な時間および動物プランクトンの形態分類についての専門的な知識が必要となることが挙げられる。こうした問題の解決策として，従来の顕微鏡解析に比べて正確，簡便かつ短時間にサイズ分布の解析が可能な光学式プランクトンカウンター(OPC: Optical Plankton Counter; Herman，1988)が導入されている。, 北海道大学大学院水産科学研究科, Japanese, Report research institution

  
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• 北太平洋亜寒帯域に優占する大型外洋性カイアシ類の同化効率に関する研究
  阿部義之; 夏池真史; 松野孝平; 照井健史; 山口篤; 岸道郎; 今井一郎, 日本ベントス学会・日本プランクトン学会合同大会講演要旨集, 2013, 69, 26 Sep. 2013
  Japanese
• 光学式プランクトンカウンターによる北太平洋外洋域における動物プランクトン群集の空間変動解析
  山口篤; 塩田知也; 阿部義之; 齋藤類; 松野孝平; 今井一郎, 日本ベントス学会・日本プランクトン学会合同大会講演要旨集, 2013, 99, 26 Sep. 2013
  Japanese
• 石狩湾における動物プランクトン群集の季節変化,特に小型カイアシ類の生活史について
  有馬大地; 山口篤; 松野孝平; 阿部義之; 齋藤類; 浅見大樹; 嶋田宏; 今井一郎, 日本海洋学会大会講演要旨集, 2013, 240, 30 Aug. 2013
  Japanese
• 初夏のベーリング海北部・チュクチ海におけるコククジラと底生生物の分布
  三谷曜子; 岩原由佳; 関口圭子; 松野孝平; 山口篤; 宮下和士, 極域科学シンポジウム講演予稿集(CD-ROM), 4th, ROMBUNNO.IA,MITANIYOKO,1,V3, 2013
  Japanese
• 西部北極海ノースウィンド海底平原におけるメソ動物プランクトン群集の季節変動
  松野孝平; 山口篤; 藤原周; 小野寺丈尚太郎; 渡邉英嗣; 今井一郎; 千葉早苗; 原田尚美; 菊池隆, 極域科学シンポジウム講演予稿集(CD-ROM), 4th, ROMBUNNO.IA,MATSUNOKOHEI,1, 2013
  Japanese
• 親潮域におけるマイクロネクトン甲殻類の生活史と生産量に関する研究
  山口篤; 筑後果菜; 松野孝平; 齋藤類; 今井一郎, 日本ベントス学会・日本プランクトン学会合同大会講演要旨集, 2012, 90, 05 Oct. 2012
  Japanese
• 2010年夏季の西部北極海におけるマイクロプランクトン群集の水平分布
  松野孝平; 石井健一郎; 夏池真史; 塚崎千庫; 山口篤; 今井一郎, 日本海洋学会大会講演要旨集, 2012, 271, 13 Mar. 2012
  Japanese
• 季節海氷域における珪藻類の生活史戦略
  塚崎千庫; 松野孝平; 石井健一郎; 山口篤; 今井一郎, 日本海洋学会大会講演要旨集, 2012, 74, 13 Mar. 2012
  Japanese
• 北極チュクチ海海底堆積物表層および水柱における珪藻類休眠期細胞の分布
  塚崎千庫; 松野孝平; 石井健一郎; 山口篤; 今井一郎, 日本ベントス学会・日本プランクトン学会合同大会講演要旨集, 2011, 75, 16 Sep. 2011
  Japanese
• 夏季チャクチ海における動物プランクトン群集サイズ組成の経年変動
  松野孝平; 山口篤; 今井一郎, 日本海洋学会大会講演要旨集, 2011, 204, 01 Sep. 2011
  Japanese
• 夏季の西部北極海における主要カイアシ類の化学組成と消化管色素量
  松野孝平; 山口篤, Blue Earth要旨集, 2011, 52, Mar. 2011
  Japanese
• 西部北極海における動物プランクトン研究の現状と課題
  松野孝平; 山口篤; 今井一郎, 極域科学・宙空圏・気水圏・生物・地学シンポジウム講演予稿集(CD-ROM), 2011, ROMBUNNO.C.BGC.KOHEIMATSUNO, 2011
  Japanese
• 西部北太平洋155°E線に沿った春季動物プランクトン群集構造の緯度および経年変化(2002‐2011年)
  山口篤; 松野孝平; 阿部義之; 今井一郎, 水産海洋学会研究発表大会講演要旨集, 2011, 93, 2011
  Japanese
• 夏季の西部北極海(チャクチ海)における動物プランクトン群集の経年変動
  松野孝平; 山口篤; 平譯享; 今井一郎, 日本海洋学会大会講演要旨集, 2010, 183, 15 Mar. 2010
  Japanese
• 2008年夏季の西部北極海におけるカイアシ類群集の水平分布
  松野孝平; 山口篤, Blue Earth要旨集, 2010, 160, Mar. 2010
  Japanese
• 2008年夏季の西部北極海におけるカイアシ類群集の水平分布
  松野孝平; 山口篤, 日本ベントス学会・日本プランクトン学会合同大会講演要旨集, 2009, 209, 16 Oct. 2009
  Japanese
• 夏季北太平洋におけるメソ動物プランクトンの下方輸送量の推定:Optical Plankton Counterによる解析
  松野孝平; 山口篤, 日本海洋学会大会講演要旨集, 2009, 80, 23 Mar. 2009
  Japanese

• プランクトンは海の語り部 ~変わりゆく極域~
  松野孝平
  海文堂出版, Sep. 2020, [Single work]
• 水産科学・海洋環境科学実習
  山口 篤; 今井一郎; 平譯 享; 松野孝平
  海文堂出版, Aug. 2019, [Joint work]
• 海をまるごとサイエンス ～水産科学の世界へようこそ～
  松野孝平, 小さな生き物から地球を知る
  海文堂出版, Aug. 2018, [Contributor]
• 低温環境の科学辞典
  松野孝平, 北極の動物プランクトン
  朝倉書店, Jul. 2016, [Contributor]

• 海洋生物学特論Ⅱ, 2024年, 修士課程, 水産科学院
• Introduction to Fisheries Sciences Ⅰ（水産科学汎論Ⅰ）, 2024年, 修士課程, 水産科学院
• 大学院共通授業科目（一般科目）：自然科学・応用科学, 2024年, 修士課程, 大学院共通科目
• 環境と人間, 2024年, 学士課程, 全学教育
• 一般教育演習(ﾌﾚｯｼｭﾏﾝｾﾐﾅｰ), 2024年, 学士課程, 全学教育
• 海洋生物科学実験Ⅲ, 2024年, 学士課程, 水産学部
• 水産科学英語Ⅰ, 2024年, 学士課程, 水産学部
• 洋上実習Ⅰ, 2024年, 学士課程, 水産学部
• プランクトン学, 2024年, 学士課程, 水産学部
• 海洋生物科学Ⅱ, 2024年, 学士課程, 水産学部

• JAPAN GEOSCIENCE UNION
• Association for the Sciences of Limnology and Oceanography
• THE OCEANOGRAPHIC SOCIETY OF JAPAN
• THE PLANKTON SOCIETY OF JAPAN
• 日本水産学会

• 気候変動が海洋表層植物プランクトンへ与える影響：一般化非類似度モデルによる解明
  科学研究費助成事業
  Apr. 2025 - Mar. 2028
  松野 孝平; 藤原 周; 脇田 昌英; 北島 聡
  日本学術振興会, 基盤研究(A), 北海道大学, Principal investigator, 25H01177
• Study on the impact of climate change on the marine ecosystem lower trophic levels by using the historically collected samples
  Grants-in-Aid for Scientific Research
  Apr. 2022 - Mar. 2027
  山口 篤; 松野 孝平
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 22H00374
• 極域の海氷下および浅海底における珪藻類生産の実態解明
  科学研究費助成事業
  01 Apr. 2021 - 31 Mar. 2026
  松野 孝平; 藤原 周; 安藤 卓人
  本研究は、海氷衰退が著しい北極海陸棚域において、海氷下と海底面での珪藻類による一次生産量と種組成を明らかにし、海氷分布と比較することで、海氷変動による珪藻類生産への影響を解明することを目的としている。令和5年度における本研究に関連する研究成果としては、査読付き論文6報、学会での口頭及びポスター発表を5件行った。
  令和5年度（2023年度）は、北海道大学水産学部附属練習船おしょろ丸航海（7月）とJAMSTEC海洋地球研究船みらい北極航海（9月）に参加し、追加の試料採集と、船上実験を行った。追加試料としては、おしょろ丸航海での24地点とみらい航海での11地点の計35地点において、休眠期細胞およびバイオマーカー分析用の採泥を行った。船上実験としては、おしょろ丸30地点およびみらい22地点において、海表面、亜表層クロロフィル蛍光最大層 (SCM) および海底直上から海水を採取し、PAM（パルス変調蛍光光度計）によって光合成活性を分析した。さらに、おしょろ丸航海では画像解析装置FlowCamによる植物プランクトン細胞の撮影も行った。これらのデータを一次解析した結果、最大量子収率は、7月ではSCM＞海底直上＞海表面の順であったのに対し、9月ではSCM＞海表面＞海底直上と、鉛直的な傾向が異なっていた。海底直上での光合成活性に注目すると、7月は海表面から沈降する植物プランクトンの活性が高く、また海底まで光が届いているため、比較的高い最大量子収率を示したと考えられる。一方で、9月は日照時間が短くなり、海底へ届く光量も減少するため、海底付近に沈降している植物プランクトンの光合成活性が低下していたと考えられる。このように、同一年内に2回の異なる時期の調査が行えたことで、植物プランクトン活性の季節変化が評価できたことは、貴重な成果と言える。
  日本学術振興会, 基盤研究(B), 北海道大学, 23K21227
• 函館湾における植物プランクトン群集の季節変動とモデルによる予測
  先端的な学術研究
  Apr. 2025 - Mar. 2026
  松野孝平
  公益財団法人 南北海道学術振興財団, 北海道大学, Principal investigator
• 極域の海氷下および浅海底における珪藻類生産の実態解明
  科学研究費助成事業 基盤研究(B)
  Apr. 2021 - Mar. 2026
  松野 孝平; 藤原 周; 安藤 卓人
  本研究は、海氷衰退が著しい北極海陸棚域において、海氷下と海底面での珪藻類による一次生産量と種組成を明らかにし、海氷分布と比較することで、海氷変動による珪藻類生産への影響を解明することを目的としている。令和3年度（2021年度）は、JAMSTEC海洋地球研究船みらいの北極航海（2021年8月28日～10月22日）に参加し、太平洋側北極海において海氷試料（4地点）、海水試料（45地点）および海底堆積物（11地点）を採取した。また、船上において、本研究課題の予算で購入したPAM（パルス変調蛍光光度計）を用いた光合成パラメーターの測定（175回）、およびviability染色キットによる生死判別試料の作成も行った。2021年度の太平洋側北極海は、例年よりも海氷が多く残っていたために、海氷のサンプリングができたことが大きな成果である。これにより、同一地点において、海氷、海表面の海水、亜表層クロロフィルa最大層の海水、海底直上10 mの海水、海底堆積物の直上水および海底堆積物を採取し、かつPAMによる光合成活性の測定と生死判別分析もできているため、本研究課題の核をなす結果が得られると期待できる。本研究に関連する研究成果としては、査読付き論文4報、学会での口頭及びポスター発表を6件行った。
  令和3年度において、最も重要な研究成果としては、太平洋側北極海の海底堆積物中の珪藻類の休眠期細胞の分布と組成は、海氷の融解時期や分布に大きく影響を受けていることを明らかにした点である。これにより、本研究課題で設定した仮説「海氷変動が珪藻類の休眠期細胞に影響を与えること」が実証された。この研究では、アイスアルジーの存在割合が、結氷期間が長い海域ほど高くなることも示している。この成果は、本研究で取り組むバイオマーカー（つまり、アイスアルジー）の分布も、海氷と密接に関係していることを示唆している。
  日本学術振興会, 基盤研究(B), 北海道大学, Principal investigator, 21H02263
• 北極海洋生態系を育む「種」を運ぶDirty Iceの役割とその空間分布の解明
  科学研究費助成事業
  01 Apr. 2021 - 31 Mar. 2025
  藤原 周; 八田 真理子; 伊藤 優人; 塩崎 拓平; 松野 孝平
  冬季の北極海では海氷が生成する際に、海底堆積物が巻き上がり氷に取り込まれることがある。本研究では、そのプロセスと共に植物プランクトンも海氷内部に取り込まれ、それが春季に融氷とともに放出されることで、春季ブルームの起源となるという仮説をたて、それを観測・実験によって立証することを目的としている。令和5年度はパンデミックも収まったこともあり、アラスカ州ウトキアグヴィクにおける沿岸定着氷上の現場観測を実施し、本課題の鍵となる堆積物を含んだ海氷（Dirty Ice）試料を計画通り得ることができた。仮説検証のための実験を行い、仮説の通り、堆積物を含んだ海氷には植物プランクトン細胞が多く含まれていることが分かり、冬季の凍結仮定で海氷内に植物プランクトンが取り込まれることを確認した。また、追加試料の採取のため、令和6年度も定着氷観測に参加し、Dirty Iceの融解に伴う、春季ブルームの模擬実験とその試料の分析・解析を進める。令和5年度はまた、衛星リモートセンシングを用いた海氷運動の後方追跡手法とDirty Ice分布推定手法を組み合わせることで、Dirty Iceの生成場所のマッピング手法を概ね確立した。ウトキアグヴィク沖含む、北極海の沿岸ポリニヤ生成域や沿岸定着氷域における、Dirty Iceの活発な生成が面的に明らかとなった。また、長く溶け残った一部のDirty Iceは、3年以上かけてアラスカ沿岸からグリーンランド沿岸まで移動していることも明らかとなり、実験結果と合わせると海氷が植物プランクトンの「種」を運ぶキャリアとして重要な役割を持つことが示唆された。本件についても、令和6年度に論文としてまとめる。
  日本学術振興会, 基盤研究(B), 国立研究開発法人海洋研究開発機構, 23K21744
• 氷河がフィヨルド環境に果たす役割 ―グリーンランドとパタゴニアで何が違うのか―
  Apr. 2024 - Mar. 2025
  野村大樹; 杉山慎; 漢那直也; 松野孝平; 干場康博
  北海道大学低温科学研究所, 一般共同研究, 北海道大学低温科学研究所, 24G046
• 太平洋側北極海の海氷減少による大型カイアシ類の分布域拡大の可能性
  2国間交流事業共同研究
  Apr. 2023 - Mar. 2025
  松野孝平
  日本学術振興会, 北海道大学, Principal investigator
• 海洋課題 北極海環境動態の解明と汎用データセットの構築
  Apr. 2022 - Mar. 2025
  渡邉 英嗣; 上野 洋路; 伊東 素代; 木村 仁; 張 圓昕; 安中 さやか; 八田 真理子; 中嶋 亮太; 池上 隆仁; 村田 昌彦; 重光 雅仁; 野口 真希; 西野 茂人; 小野寺丈尚太郎; 藤原 周; 杉江 恒二; 木元 克典; 喜多村 稔; 阿部 泰人; 松野 孝平; 笠井 亮秀; 川上 達也; 野村 大樹; 平田 貴文; ガルシア・モリノス・ホルヘ; アラビア・ドロルフイー・アイリーン; 大島 慶一郎; 西岡 純; 亀山 宗彦; 山本 正伸; 平譯 享; 伊藤 優人; 原田 尚美; 塩崎 拓平; 川口 悠介; 小平 翼; 溝端 浩平; 川合 美千代
  文部科学省 北極域研究加速プロジェクト, JPMXD1420318865
• 北極海洋生態系を育む「種」を運ぶDirty Iceの役割とその空間分布の解明
  科学研究費助成事業
  Apr. 2021 - Mar. 2025
  藤原 周; 八田 真理子; 伊藤 優人; 塩崎 拓平; 松野 孝平
  日本学術振興会, 基盤研究(B), 国立研究開発法人海洋研究開発機構, 21H03583
• 函館湾七重浜における植物プランクトン群集が温暖化で受ける影響の評価
  先端的な学術研究
  Apr. 2021 - Mar. 2022
  松野孝平
  公益財団法人 南北海道学術振興財団, 北海道大学, Principal investigator
• Inter-annual changes in zooplankton community in the Bering Sea shelf: Based on imaging analysis
  Grants-in-Aid for Scientific Research
  Apr. 2017 - Mar. 2022
  Yamaguchi Atsushi
  To evaluate the effects of climate changes on the marine lower trophic level ecosystems, I analyzed wet weight biomass of the formalin-preserved zooplankton samples collected by the same method in the southeastern Bering Sea shelf during the summers of 1955 to 2013. Size and taxonomic accounts of the samples for the consecutive two years belonging to the four different climate regimes were also analyzed by the imaging device: ZooScan. For the field imaging analyzing devices, I developed the frame-mounted camera for quantification of the macro-sized gelatinous zooplankton (jellyfish). In 2017 and 2018, when the timing of the sea ice melting was greatly different, I analyzed the abundance and biomass of each trophic level from phytoplankton to seabirds, and evaluated the relationship between environmental variables and biomasses at each trophic level.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 17H01483
• Experimental study on effect by different prey for copepod ecology and physiology
  Grants-in-Aid for Scientific Research
  01 Apr. 2018 - 31 Mar. 2021
  MATSUNO Kohei
  Copepods quickly increased their grazing rate in autumn phytoplankton bloom of the Arctic Ocean. While, Pacific copepods did not actively graze the phytoplankton in the Arctic Ocean. These grazing activities were controlled by not only exogenous factors (food contents) but also endogenous factors (lipid accumulation). Their reproduction was governed with the timing of spring phytoplankton bloom associated with sea-ice melt.
  Japan Society for the Promotion of Science, Grant-in-Aid for Early-Career Scientists, Hokkaido University, Principal investigator, Competitive research funding, 18K14506
• 海氷中の低次生態系の動態に関する研究
  Researcher’s Community Support Projects Promoting collaborative research
  Apr. 2019 - Mar. 2020
  Matsuno Kohei
  Hokkaido University, Principal investigator, Competitive research funding
• 有殻翼足類の再生産と初期発育段階に関する生態学的研究
  2019年度個別研究助成
  Apr. 2019 - Mar. 2020
  松野孝平
  公益財団法人水産無脊椎動物研究所, Principal investigator, Competitive research funding
• 季節海氷域における海氷期の生態系構造に関する研究
  Researcher’s Community Support Projects Promoting collaborative research
  Apr. 2018 - Mar. 2019
  Matsuno Kohei
  Hokkaido University, Principal investigator, Competitive research funding
• Influence of sea ice loss and oceanic eddies to biological pump condition in the western Arctic Ocean
  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
  Apr. 2015 - Mar. 2019
  ONODERA Jonaotaro
  We studied relationship between physical oceanographic condition (dynamics of sea-surface current system and oceanic eddies) and transportation of shelf materials (such as plankton remains and lithogenic matters) to basin in Pacific side of the Arctic Ocean (western Canada Basin and Chukchi Borderland) where recent sea-ice reduction is remarkable. Annual and interannual fixed-point observation using sediment trap mooring showed that supply of shelf-origin particles increased when lateral advection of Pacific-origin water and oceanic eddies containing shelf matters reached to the monitoring stations. It was suggested that large interannual differences on physical oceanographic dynamics for 2011-2018 changed the distribution of laterally transported shelf-origin matters in offshore side of study region. It is suggested that those hydrographic changes influence to lower-trophic ecosystems applying shelf-origin matters in the basin side.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Japan Agency for Marine-Earth Science and Technology, 15H01736
• JSPS Postdoctoral Fellowships for Research Abroad
  Apr. 2016 - Mar. 2018
  Matsuno Kohei
  Japan Society for the Promotion of Science, Principal investigator, Competitive research funding
• Early Career Scientist Fellowships for Arctic Environmental Research
  Dec. 2014 - Dec. 2014
  Matsuno Kohei
  National Institute of Polar Research, Principal investigator, Competitive research funding
• Support for traveling abroad
  Feb. 2012 - Feb. 2012
  Kohei Matsuno
  Japan Marine Science Foundation, Principal investigator, Competitive research funding
• 地球温暖化が西部北極海の動・植物プランクトンに与える影響
  科学研究費助成事業 特別研究員奨励費
  2011 - 2012
  松野 孝平
  本研究は研究サブテーマとして以下の4つを設け、本年度より派生展開的な新サブテーマ(5)を設けた。以下に各サブタイトルの成果を記す。
  (1)2010年夏季の西部北極海における植物プランクトンの水平分布
  2010年みらい北極航海にて採取した植物プランクトン試料を解析した。得られた結果をまとめ、IPY2012にてポスター発表を行った。さらに、「Horizontal distribution of microplankton community structure in the western Arctic Ocean during late summer of 2010」とした学術論文をPolar Biologyに投稿し、現在査読中である。
  (2)2010年夏季の西部北極海における動物プランクトンの水平分布
  2008および2010年みらい北極航海にて採集した動物プランクトン試料の検鏡を行った。得られた結果をまとめ、ASLOにて口頭発表を行った。今後は、2012年みらい航海の試料も解析する予定である。
  (3)西部北極海における動物プランクトンの摂餌生態
  2010年および2012年のみらい北極航海においてカイアシ類摂餌実験(計18回)によりデータを取得した。しかし、取得したデータだけでは「動物プランクトンによる植物プランクトンへの摂餌インパクトの評価」には不十分であるため、2013年6-7月のおしょろ丸北洋航海および9-10月のみらい北極航海にて引き続き実験を行う予定である。
  (4)チャクチ海における動物プランクトンサイズ組成の経年変動
  1991、1992、2007および2008年にチャクチ海で採集された動物プランクトン試料のOPC測定を行った。得られた結果をまとめ、タイトル「Biomass size spectra of mesozooplankton in the Chukchi Sea during summers of 1991/1992 and 2007/2008:an analysis by optical plankton counter」とした学術論文を執筆し、2nd ESSASの特集号(ICES Journal of Marine Science)に学術論文を投稿し、受理・印刷済みである。
  (5)セジメントトラップによって採集された動物プランクトン群集の季節変動
  西部北極海において2010年10月～2011年9月にかけてセジメントトラップにより採集された動物プランクトン試料の解析を行った。得られた結果を、3rd ESSASおよびISAR-3にて発表し、タイトル「Seasonal changes in mesozooplankton swimmers collected by sediment trap moored in the western Arctic Ocean」とした学術論文をJournal of Plankton Researchに投稿し、現在査読中である。
  日本学術振興会, 特別研究員奨励費, 北海道大学, 11J04167