研究者データベース

松野 孝平(マツノ コウヘイ)
水産科学研究院 海洋生物資源科学部門 海洋生物学分野
助教

基本情報

所属

  • 水産科学研究院 海洋生物資源科学部門 海洋生物学分野

職名

  • 助教

学位

  • 水産科学(2013年03月 北海道大学)

論文上での記載著者名

  • Kohei Matsuno
  • K. Matsuno

ホームページURL

科研費研究者番号

  • 90712159

J-Global ID

研究キーワード

  • マイクロプランクトン   気候変動   グリーンランド   南極海   Optical plankton counter   サイズ組成   セジメントトラップ   群集構造   植物プランクトン   カイアシ類   北極海   動物プランクトン   

研究分野

  • ライフサイエンス / 水圏生産科学 / プランクトン
  • 環境・農学 / 環境動態解析

職歴

  • 2017年10月 - 現在 北海道大学 大学院水産科学研究院 海洋生物資源科学部門 海洋生物学分野 助教
  • 2019年02月 - 2019年06月 University of Tasmania Antarctic Climate and Ecosystems (ACE) CRC Adjunct Professor
  • 2016年04月 - 2017年09月 オーストラリア南極局 JSPS 海外特別研究員
  • 2013年04月 - 2016年03月 国立極地研究所 国際北極環境研究センター 特任研究員

学歴

  • 2008年04月 - 2013年03月   北海道大学大学院   水産科学院   海洋生物資源科学
  • 2004年04月 - 2008年03月   北海道大学   水産学部   水産海洋科学

所属学協会

  • 日本地球惑星科学連合   Association for the Sciences of Limnology and Oceanography   日本海洋学会   日本プランクトン学会   

研究活動情報

論文

  • Fumihiko Kimura, Yoshiyuki Abe, Kohei Matsuno, Russell R. Hopcroft, Atsushi Yamaguchi
    Deep Sea Research Part II: Topical Studies in Oceanography 181-182 104901 - 104901 2020年12月 [査読有り][通常論文]
  • Yuri Fukai, Yoshiyuki Abe, Kohei Matsuno, Atsushi Yamaguchi
    Deep Sea Research Part II: Topical Studies in Oceanography 181-182 104903 - 104903 2020年12月 [査読有り][通常論文]
  • Marie Maekakuchi, Kohei Matsuno, Jun Yamamoto, Yoshiyuki Abe, Atsushi Yamaguchi
    Deep Sea Research Part II: Topical Studies in Oceanography 181-182 104818 - 104818 2020年12月 [査読有り][通常論文]
  • 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 2020年08月 [査読有り][通常論文]
  • 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 2020年07月22日 [査読有り][通常論文]
  • Atsushi Yamaguchi, Fumihiko Kimura, Yuri Fukai, Yoshiyuki Abe, Kohei Matsuno, Atsushi Ooki, Toru Hirawake
    Polar Science 100555 - 100555 2020年06月 [査読有り][通常論文]
  • 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 2020年06月 [査読有り][通常論文]
  • Koki Tokuhiro, Yoshiyuki Abe, Jonaotaro Onodera, Makoto Sampei, Amane Fujiwara, Naomi Harada, Kohei Matsuno, Eva-Maria Nöthig, Atsushi Yamaguchi
    Polar Science 24 100509 - 100509 2020年06月 [査読有り][通常論文]
  • K Matsuno, N Kanna, S Sugiyama, A Yamaguchi, EJ Yang
    Marine Ecology Progress Series 642 55 - 65 2020年05月28日 [査読有り][通常論文]
     
    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.
  • Kohei Matsuno, Jake R. Wallis, So Kawaguchi, Sophie Bestley, Kerrie M. Swadling
    Deep Sea Research Part II: Topical Studies in Oceanography 174 104788 - 104788 2020年04月 [査読有り][通常論文]
  • 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 2020年02月 [査読有り][通常論文]
  • 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 2019年10月 [査読有り][通常論文]
  • 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 2019年03月 [査読有り][通常論文]
  • 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 2019年03月 [査読有り][通常論文]
  • 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 2019年03月 [査読有り][通常論文]
  • 太平洋側北極海における海氷衰退による プランクトン群集への影響
    松野孝平
    海の研究 27 6 217 - 230 2018年12月 [査読有り][通常論文]
  • 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 2018年06月 [査読有り][通常論文]
  • Amane Fujiwara, Shigeto Nishino, Kohei Matsuno, Jonaotaro Onodera, Yusuke Kawaguchi, Toru Hirawake, Koji Suzuki, Jun Inoue, Takashi Kikuchi
    Polar Biology 41 6 1279 - 1295 2018年06月01日 [査読有り][通常論文]
     
    The recent increasing of atmospheric turbulence has had considerable impact on the oceanic environment and ecosystems of the Arctic. To understand its effect on phytoplankton community structure, a Eulerian fixed-point observation (FPO) was conducted on the Chukchi shelf in fall 2013. Temporal and vertical distributions of the phytoplankton community were inferred from algal pigment signatures. A strong wind event (SWE) occurred during the observation term, and significant convection supplied nutrients from the bottom layer to the surface. Before the SWE, pigment composition in the warmer, less saline, and nutrient-poor surface waters was diverse with low concentration of chlorophyll-a (chla). Vertical mixing induced by the SWE weakened the stratification and brought sufficient nutrients to enhance diatom-derived pigment concentrations (e.g., fucoxanthin and chlc3), suggesting increases in diatoms. We also developed a model to predict the distribution of major phytoplankton pigment/chla ratios using a profiling multi-wavelength fluorometer (Multi-Exciter) with higher spatio-temporal resolution. The Multi-Exciter also captured changes in pigment composition with environmental changes at the FPO site and at four observation sites 16 km from the location of the FPO. Furthermore, we investigated the change in grazing rates of the major Arctic copepod Calanus glacialis copepodid stage five to assess the interaction between primary and secondary producers during the fall bloom. Increased diatom biomass caused a significant increase in the grazing rate on microphytoplankton (>  20 µm) and a decrease on nanophytoplankton (2–20 µm), indicative of a strong cascade effect because of the reduction of microzooplankton due to the grazing from C. glacialis. We conclude that SWEs during fall might affect food webs via the alternation of seasonal succession of phytoplankton community structure.
  • Jose M. Landeira, Kohei Matsuno, Yuji Tanaka, Atsushi Yamaguchi
    Polar Science 16 86 - 89 2018年06月 [査読有り][通常論文]
     
    © 2018 In the Bering Sea, warming and reduction of summer sea-ice cover are driving species ranges towards the Arctic. Tanner crab, Chionoecetes bairdi, is a commercially important species in the SE Bering Sea with a northerly range margin in 62ºN. In this paper, using plankton samples collected in the Pacific sub-Arctic/Arctic sector during summer, we report for the first time the presence of larval stages (zoea II) of C. bairdi far from its northern limit of the distribution, in the south of St. Lawrence Island during 1991, and even crossing the Bering Strait into the Chukchi Sea during 1992. We suggest that the long planktonic phase (3–5 months), in combination with the oceanographic circulation, may facilitate eventual long-distance transport.
  • Hikaru Hikichi, Daichi Arima, Yoshiyuki Abe, Kohei Matsuno, Soshi Hamaoka, Seiji Katakura, Hiromi Kasai, Atsushi Yamaguchi
    Regional Studies in Marine Science 20 34 - 44 2018年04月01日 [査読有り][通常論文]
     
    To evaluate the temporal changes in zooplankton size spectra, optical plankton counter (OPC) measurements were made of high-frequency time-series zooplankton samples collected at approximately 3.5-day intervals in Mombetsu Harbour, which is located in the southern Okhotsk Sea, from January to December 2011. Based on biomasses of 47 equivalent spherical diameter (ESD) size classes binned at 0.1 mm intervals across 0.35–5 mm, the Bray–Curtis similarity index separated the zooplankton community into six groups (A–F). The occurrence of each group was separated seasonally. Thus, groups A and B were observed during the ice-covered season and summer season, respectively. During March and June, groups C–F were observed. Their occurrence varied in the short term in relation to the exchange of water masses. Groups A and C, which were observed from January to April, showed flatter normalized biomass size spectra (NBSS) slopes (−0.85 to −1.1), which indicate low productivity. In contrast, the other groups showed steeper slopes (−1.31 to −1.52) from May to December, with high productivity. Throughout the year, the frequency of highly productive groups occurred at a high level (95.2%). Although the seasonal variability in zooplankton size and productivity in Mombetsu Harbour was mainly governed by water mass exchanges, the productivity was continuously high throughout nearly all of the one-year study period.
  • 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  2017年11月 [査読有り][通常論文]
     
    The eastern Bering Sea has a vast continental shelf, which contains various endangered marine mammals and large fishery resources. Recently, high numbers of toxic A. tamarense resting cysts were found in the bottom sediment surface of the eastern Bering Sea shelf, suggesting that the blooms have recently occurred. However, little is known about the presence of A. tamarense vegetative cells in the eastern Bering Sea. This study's goals were to detect the occurrence of A. tamarense vegetative cells on the eastern Bering Sea shelf and to find a relationship between environmental factors and their presence. Inter-annual field surveys were conducted to detect A. tamarense cells and environmental factors, such as nutrients, salinity, chlorophyll a, and water temperature, along a transect line on the eastern Bering Sea shelf during the summers of 2004, 2005, 2006, 2009, 2012, and 2013. A. tamarense vegetative cells were detected during every sampling year, and their quantities varied greatly from year to year. The maximum cell densities of A. tamarense observed during the summers of 2004 and 2005 were much higher than the Paralytic shellfish poisoning warning levels, which are greater than 100-1,000 cells L-1, in other subarctic areas. Lower quantities of the species occurred during the summers of 2009, 2012, and 2013. A significant positive correlation between A. tamarense quantity and water temperature and significant negative correlations between A. tamarense quantity and nutrient concentrations (of phosphate, silicate, and nitrite and nitrate) were detected in every sampling period. The surface- and bottom-water temperatures varied significantly from year to year, suggesting that water temperatures, which have been known to affect the cell growth and cyst germination of A. tamarense, might have affected the cells' quantities in the eastern Bering Sea each summer. Thus, an increase in the Bering Sea shelf's water temperature during the summer will increase the frequency and scale of toxic blooms and the toxin contamination of plankton feeders. This poses serious threats to humans and the marine ecosystem.
  • Jose M. Landeira, Kohei Matsuno, Atsushi Yamaguchi, Toru Hirawake, Takashi Kikuchi
    POLAR BIOLOGY 40 9 1805 - 1819 2017年09月 [査読有り][通常論文]
     
    Crustacean decapods are key components that structure the benthic ecosystems in the Subarctic/Arctic regions and support one of the largest fishery industries, but their larval dynamics are largely unknown. To investigate variability in decapod larvae community in this region, we analysed plankton samples collected during the summers of 2007 and 2008 along the southeastern Bering and Chukchi Seas. Distribution of adult population was studied using bottom trawling during 2008 cruise. Larvae of Pagurus spp., Hyas spp., and the commercially important Chionoecetes bairdi and Chionoecetes opilio were the most abundant species. The distribution of benthic adults linked to those of planktonic larvae and may favour recruitment near suitable habitats and the maintenance of the populations. Earlier larval stages of C. bairdi, C. opilio, and Hyas spp. were more abundant in 2008 than in 2007. The body size of C. opilio showed a significant latitudinal pattern, in which larger sizes occurred at higher latitudes in association with distinct temperature and food conditions. We argue that annual changes in abundance and developmental stage structure of planktonic larvae seemed to be related to the 1 month delay in the sampling period and are not determined by the contrasting environmental conditions observed in both years.
  • Masafumi Natsuike, Hiroshi Oikawa, Kohei Matsuno, Atsushi Yamaguchi, Ichiro Imai
    HARMFUL ALGAE 63 13 - 22 2017年03月 [査読有り][通常論文]
     
    Abundant cyst distributions of the toxic dinoflagellate Alexandrium fundyense (previous A. tamarense north American Glade) were recently observed on the north Chukchi Sea shelf and on the eastern Bering Sea shelf, suggesting that A. fundyense is both highly adapted to the local environments in the high latitude areas and might cause toxin contamination of plankton feeders. However, little is known about the physiological characteristics and toxin profiles of A. fundyense in these areas, which are characterized by low water temperatures, weak sunlight, and more or less permanent ice cover during winter. To clarify the physiological characteristics of A. fundyense, the effects of water temperature and light intensity on the vegetative growth and toxin profiles of this species were examined using A. fundyense strains isolated from one sediment sample collected from each area. Using the same sediments samples, seasonal changes of the cyst germination in different water temperatures were investigated. Vegetative cells grew at temperatures as low as 5 degrees C and survived at 1 degrees C under relatively low light intensity. They also grew at moderate water temperatures (10-15 degrees C). Their cysts could germinate at low temperatures (1 degrees C) and have an endogenous dormancy period from late summer to early spring, and warmer water temperatures (5-15 degrees C) increased germination success. These physiological characteristics suggest that A. fundyense in the Chukchi Sea and eastern Bering Sea is adapted to the environments of high latitude areas. In addition, the results suggest that in the study areas A. fundyense has the potential to germinate and grow when water temperatures increase. Cellular toxin amounts of A. fundyense strains from the eastern Bering Sea and Chukchi Sea were ranged from 7.2 to 38.2 fmol cell(-1). These toxin amounts are comparable with A. fundyense strains isolated from other areas where PSP toxin contamination of bivalves occurs. The dominant toxin of the strains isolated from the Chukchi Sea was saxitoxin, while mostA.fundyense strains from the eastern Bering Sea are dominated by the C2 toxin. Toxin profiles similar to those detected in Chukchi Sea have not been reported by any previous research. The dominance of a highly toxic PST variant in Chukchi A. fundyense suggests that presence of the species at low cell concentrations may cause toxin contamination of predators. This study revealed that abundant A. fundyense cysts deposited on the eastern Bering Sea and Chukchi Sea shelves potentially germinate and grow with PSP toxin contents in the local environments. In conclusion, a high risk of PSP occurrences exists on the eastern Bering Sea and Chukchi Sea shelves. (C) 2017 Elsevier B.V. All rights reserved.
  • Asami Nakamura, Kohei Matsuno, Yoshiyuki Abe, Hiroshi Shimada, Atsushi Yamaguchi
    ZOOLOGICAL STUDIES 56 13 2017年 [査読有り][通常論文]
     
    While length-weight (L-W) regressions for warm-water zooplankton taxa from the waters neighbouring Japan already exist, they are still missing for comparable cold-water species. In this study, the L-W regressions of 41 species belonging to 12 taxa that are dominant in the Oyashio region were reported. The body length and volume of zooplankton were measured with an image-analysis system, and the effects of lipid accumulation in Copepoda on their mass and chemical composition were quantified. The L-W regressions had a high coefficient of determination (mean r(2) = 0.886). For the chemical composition, the water composition ranged from 69.8 to 95.2% wet mass (WM), carbon (C) composition from 3.8 to 60.8% dry mass (DM) and nitrogen (N) composition from 1.0 to 10.1% DM. Taxon-specific differences in the chemical composition were marked for the gelatinous taxa (Appendicularia, Cnidaria, Salpida), which also had high water and low C composition. Because C is an index of lipids, high water compositions together with low lipid compositions are considered to be characteristics of the gelatinous taxa. The most significant effects of lipid accumulation in the Copepoda are changes in DM and C. Within the same developmental stage, the DM and C compositions of the full lipid-containing specimens showed 495% and 741% increases, respectively, over those of the low lipid-containing specimens. These differences exceeded the changes after moulting (78.1%) for general copepod species. Thus, lipid accumulation should be evaluated for the accurate mass estimation of boreal Copepoda by image analysis.
  • Yamaguchi, A, K. Matsuno, Y. Abe, D. Arima, I. Imai
    Progress in Oceanography 150 13 - 19 2017年01月 [査読有り][通常論文]
     
    A total of 100 mesozooplankton samples collected with NORPAC nets from a 0 to 150-m depth at latitudinal stations (35-44 degrees N) along 155 degrees E each May from 2002 through 2011 were analyzed. The mesozooplankton abundance at each station varied from 39 to 1106 ind. m(-3). The mesozooplankton biomass was consistently higher (80-100 mg DM m(-3)) in the transition domain (40-42 degrees N) than the biomass in the other domains. An empirical metabolic rate-based carbon budget model indicated that production of mesozooplankton suspension feeders was highest (120-175 mg C m(-2) d(-1)) in the transition domain. A comparison between the production of the mesozooplankton suspension feeders and the food requirement of mesozooplankton carnivores indicated that the latter was well fulfilled by the former in the subarctic and transition domains. However, the food requirement of the mesozooplankton carnivores was near equal to or exceeded the production of mesozooplankton suspension feeders in the subtropical domain. As an annual event, the feeding migration of epipelagic fish to the transition and subarctic domains in summer may be interpreted by their utilization of the excess secondary production (production of mesozooplankton suspension feeders). (C) 2015 Elsevier Ltd. All rights reserved.
  • Bungo Nishizawa, Kohei Matsuno, Elizabeth A. Labunski, Kathy J. Kuletz, Atsushi Yamaguchi, Yutaka Watanuki
    BIOGEOSCIENCES 14 1 203 - 214 2017年01月 [査読有り][通常論文]
     
    The short-tailed shearwater (Ardenna tenuirostris) is one of the abundant marine top predators in the Pacific; this seabird spends its non-breeding period in the northern North Pacific during May-October and many visit the southern Chukchi Sea in August-September. We examined potential factors affecting this seasonal pattern of distribution by counting short-tailed shearwaters from boats. Their main prey, krill, was sampled by net tows in the southeastern Bering Sea/Aleutian Islands and in the Bering Strait/southern Chukchi Sea. Short-tailed shearwaters were mainly distributed in the southeastern Bering Sea/Aleutian Islands (60 +/- 473 birds km(-2)) in July 2013, and in the Bering Strait/southern Chukchi Sea (19 +/- 91 birds km(-2)) in September 2012. In the Bering Strait/southern Chukchi Sea, krill size was greater in September 2012 (9.6 +/- 5.0 mm in total length) than in July 2013 (1.9 +/- 1.2 mm). Within the Bering Strait/southern Chukchi Sea in September 2012, short-tailed shearwaters occurred more frequently in cells (50 +/- 50 km) where large-sized krill were more abundant. These findings, and information previously collected in other studies, suggest that the seasonal northward movement of short-tailed shearwaters might be associated with the seasonal increase in krill size in the Bering Strait/southern Chukchi Sea. We could not, however, rule out the possibility that large interannual variation in krill abundance might influence the seasonal distribution of shearwaters. This study highlights the importance of krill, which is advected from the Pacific, as an important prey of top predators in the Arctic marine ecosystem.
  • Masafumi Natsuike, Kohei Matsuno, Toru Hirawake, Atsushi Yamaguchi, Shigeto Nishino, Ichiro Imai
    HARMFUL ALGAE 61 80 - 86 2017年01月 [査読有り][通常論文]
     
    A high abundance of resting cysts of the toxic dinoflagellate Alexandrium tamarense was recently reported in the vast continental shelf of the Chukchi Sea in the Arctic Ocean, suggesting that the species is widespread in the shelf. Nevertheless, little is known about the occurrence of A. tamarense vegetative cells in the water column of the arctic. Sea ice reduction and the inflow of Pacific summer water (PSW) through the Bering Strait have recently increased owing to warming in the shelf. To determine the spatial and temporal distributions of A. tamarense in the Chukchi Sea shelf and their relationship to the inflow of PSW, field samplings were conducted in the Chukchi Sea and north Bering Sea shelves three times during the summer of 2013 from July to October. Vegetative cells of A. tamarense was detected in both shelves at all sampling periods with a maximum density of 3.55 x 10(3) cells L-1. This species was also observed at the station at 73 degrees N, indicating the northernmost record of this species to date. The center of the A. tamarense distribution was between the north Bering and south Chukchi Sea shelf during the first collection period, and spread to the north Chukchi Sea shelf during the second and third collection periods. The species occurrences were mainly observed at stations affected by the PSW, especially Bering shelf water. Water structure of PSW was characterized by warmer surface and bottom water temperatures, and increased temperatures may have promoted the cell growth and cyst germination of A. tamarense. Therefore, it is suggested that an increase in the PSW inflow owing to warming promotes toxic A. tamarense occurrences on the Chukchi Sea shelf. (C) 2016 Elsevier B.V. All rights reserved.
  • Kohei Matsuno, Yoshiyuki Abe, Atsushi Yamaguchi, Takashi Kikuchi
    POLAR SCIENCE 10 4 503 - 510 2016年12月 [査読有り][通常論文]
     
    In the Arctic Ocean, Calanus glacialis is the most dominant species in zooplankton biomass. While important, little information is available concerning the factors controlling their population. In this study, we evaluated regional patterns and environmental factors controlling the population structure of C. glacialis in the western Arctic Ocean in summer months (July-October) in 1991, 1992, 2007, 2008, 2010, 2012, 2013 and 2014. To evaluate regional patterns, environmental parameters (temperature, salinity and chlorophyll a) and C. glacialis population parameters (abundance, biomass, mean copepodid stage and lipid accumulation) were divided into three latitudinal regions. In all three regions from July to October, chlorophyll a decreased, while the mean copepodid stage increased. These results suggest phytoplankton blooms occurred early in the sampling period, and C. glacialis grew during the period. From Structural Equation Model (SEM) analysis, the controlling factors on the C. glacialis population were evaluated. The results of the SEM analysis indicated positive correlations between abundance and biomass; Julian day and mean copepodid stage; and temperature and mean copepodid stage. Additionally, a negative correlation between abundance and mean copepodid stage was observed. (C) 2016 Elsevier B.V. and NIPR. All rights reserved.
  • Yoshiyuki Abe, Hiroomi Miyamoto, Rui Saito, Kohei Matsuno, Atsushi Yamaguchi, Ichiro Imai
    REGIONAL STUDIES IN MARINE SCIENCE 8 122 - 132 2016年11月 [査読有り][通常論文]
     
    In the Oyashio region, the dominant water masses are switched at the surface layer within a short period during spring. Simultaneously, a large phytoplankton bloom is known to occur at the surface layer, and nearly half of the annual primary production is concentrated during spring. These drastic changes in the water mass and food condition are expected to strongly affect the macrozooplankton population dynamics. However, their effects on the chaetognath population remain unknown. To evaluate the effects of the water mass exchange and spring phytoplankton bloom, we analysed short-term changes in the population structure, growth rate, gut contents and predation impact of the three dominant chaetognaths (Eukrohnia hamata, Parasagitta elegansand Pseudosagitta scrippsae) in the Oyashio region during March-April 2007. Eleven samples were collected by a 0-200 m oblique tow of a Bongo net at night during 9 March to 30 April, 2007. The effects of the water mass exchange were significant for all three chaetognath species. During the sampling period, significant growth was observed for the two dominant species (E. hamata and P. elegans). The daily growth rate was 39-50 mu m day(-1) for E. hamata and 42-101 mu m day(-1) for P. elegans. The mean predation impact of P. elegans at 0-200 m was 0.194 no. prey consumed m(-3) day(-1) and that of P. scrippsae was 0.028 no. prey consumed m(-3) day(-1). These values corresponded with 0-0.097% (P. elegans) or 0-0.043% (P. scrippsae) of the total zooplankton abundance during the spring. (C) 2016 Published by Elsevier B.V.
  • Kohei Matsuno, Jose M. Landeira Sanchez, Atsushi Yamaguchi, Toru Hirawake, Takashi Kikuchi
    POLAR SCIENCE 10 3 335 - 345 2016年09月 [査読有り][通常論文]
     
    From July to August 2007 and June to July 2008, the horizontal/geographical changes in the zooplankton community in the Bering and Chukchi Seas were studied. The geographical patterns, which were common for these two years, were observed for salinity, chlorophyll a (Chl. a), zooplankton chaetognaths, hydrozoans and the whole zooplankton community. Among them, the patterns of salinity and Chl. a were related with the horizontal distribution of the water masses. The distributions of the two carnivorous taxa were correlated with their prey (copepods or barnacle larvae). The analysis of the structural equation model (SEM) revealed that the horizontal distribution of the zooplankton abundance and biomass were governed by the different taxa. Thus, the zooplankton abundance was governed by the numerically dominant but smaller-bodied taxa, such as the barnacle larvae and copepod Pseudocalanus spp., while the zooplankton biomass was determined by the large-bodied copepods, such as Calanus glacialis/marshallae and Eucalanus bungii. (C) 2016 Elsevier B.V. and NIPR.
  • Hiroko Sasaki, Kohei Matsuno, Amane Fujiwara, Misaki Onuka, Atsushi Yamaguchi, Hiromichi Ueno, Yutaka Watanuki, Takashi Kikuchi
    BIOGEOSCIENCES 13 15 4555 - 4567 2016年08月 [査読有り][通常論文]
     
    The advection of warm Pacific water and the reduction in sea ice in the western Arctic Ocean may influence the abundance and distribution of copepods, a key component of food webs. To quantify the factors affecting the abundance of copepods in the northern Bering and Chukchi seas, we constructed habitat models explaining the spatial patterns of large and small Arctic and Pacific copepods separately. Copepods were sampled using NORPAC (North Pacific Standard) nets. The structures of water masses indexed by principle component analysis scores, satellite-derived timing of sea ice retreat, bottom depth and chlorophyll a concentration were integrated into generalized additive models as explanatory variables. The adequate models for all copepods exhibited clear continuous relationships between the abundance of copepods and the indexed water masses. Large Arctic copepods were abundant at stations where the bottom layer was saline; however they were scarce at stations where warm fresh water formed the upper layer. Small Arctic copepods were abundant at stations where the upper layer was warm and saline and the bottom layer was cold and highly saline. In contrast, Pacific copepods were abundant at stations where the Pacific-origin water mass was predominant (i.e. a warm, saline upper layer and saline and a highly saline bottom layer). All copepod groups showed a positive relationship with early sea ice retreat. Early sea ice retreat has been reported to initiate spring blooms in open water, allowing copepods to utilize more food while maintaining their high activity in warm water without sea ice and cold water. This finding indicates that early sea ice retreat has positive effects on the abundance of all copepod groups in the northern Bering and Chukchi seas, suggesting a change from a pelagic-benthic-type ecosystem to a pelagic-pelagic type.
  • Tsubasa Nakano, Kohei Matsuno, Bungo Nishizawa, Yuka Iwahara, Yoko Mitani, Jun Yamamoto, Yasunori Sakurai, Yutaka Watanuki
    POLAR BIOLOGY 39 6 1081 - 1086 2016年06月 [査読有り][通常論文]
     
    To understand trophic responses of polar cod Boreogadus saida (a key species in Arctic food webs) to changes in zooplankton and benthic invertebrate communities (prey), we compared its stomach contents and body condition between three regions with different environments: the northern Bering Sea (NB), southern Chukchi Sea (SC), and central Chukchi Sea (CC). Polar cod were sampled using a bottom trawl, and their potential prey species in the environment were sampled using a plankton net and a surface sediment sampler. Polar cod fed mainly on appendicularians in the NB and SC where copepods were the most abundant in the environment, while they fed on copepods, euphausiids, and gammarids in the CC where barnacle larvae were the most abundant species in plankton samples on average. The stomach fullness index of polar cod was higher in the NB and SC than CC, while their body condition index did not differ between these regions. The lower lipid content of appendicularians compared to other prey species is the most plausible explanation for this inconsistency.
  • Takahito Ikenoue, Kjell R. Bjorklund, Paulian Dumitrica, Anders K. Krabberod, Katsunori Kimoto, Kohei Matsuno, Naomi Harada
    MARINE MICROPALEONTOLOGY 124 75 - 94 2016年04月 [査読有り][通常論文]
     
    Radiolarians in the Arctic Ocean have been studied lately in both plankton and sediment trap samples in the Chukchi Sea area. These studies have shed light on new radiolarian taxa, especially within the order Entactinaria, including two new species of Joergensenium, Joergensenium arcticum from the western Arctic Ocean, so far restricted to the Pacific Winter Water in the Chukchi Sea, and Joergensenium clevei hitherto found in the northern part of the Norwegian Sea south of the Fram Strait. The taxonomic position of the order Entactinaria is discussed and the genus Joergensenium has been emended. We have also observed in detail the internal structure of Joergensenium arcticum using Microfocus X-ray Computed Tomography and have utilized three-dimensional imaging for the first time in a species description. (C) 2016 Elsevier B.V. All rights reserved.
  • Yoshiyuki Abe, Yuichiro Yamada, Rui Saito, Kohei Matsuno, Atsushi Yamaguchi, Kosei Komatsu, Ichiro Imai
    REGIONAL STUDIES IN MARINE SCIENCE 3 154 - 162 2016年01月 [査読有り][通常論文]
     
    Short-term changes in the population structure of dominant amphipods in the Oyashio region during the spring bloom were studied and discussed from the perspective of the effect of water mass change and the utilization of a phytoplankton bloom. Throughout the sampling period, amphipods belonging to 9 genera and 13 species were found. Among them, three amphipods (Cyphocaris challengeri, Primno abyssalis and Themisto pacifica) accounted for 89% of the total amphipod abundance and 92% of the biomass. For C. challengeri, the compositions of egg-and juvenile-carrying specimens within mature females were increased through April; juveniles exhibited a drastic increase in late April. These facts suggest that C. challengeri primarily achieved reproduction during the spring phytoplankton bloom. For P. abyssalis, growth of the mean body length was observed for each juvenile cohort. Thus, P. abyssalis achieved juvenile growth during the spring phytoplankton bloom. For T. pacifica, the compositions of egg-and juvenile-carrying females increased through April. These facts suggest that T. pacifica achieved maturation during the spring phytoplankton bloom. The effect of the water mass exchange on the amphipod population was more moderate than that observed on the other macrozooplankton taxa. This finding may be a result of a strong diel vertical migration behavior, which functions to maintain the population position. The species-specific differences in the amphipods in the utilization of spring phytoplankton may be related to the species-specific life cycle timing (phenology) in this region. (C) 2015 Elsevier B.V. All rights reserved.
  • Naoya Yokoi, Kohei Matsuno, Mutsuo Ichinomiya, Atsushi Yamaguchi, Shigeto Nishino, Jonaotaro Onodera, Jun Inoue, Takashi Kikuchi
    BIOGEOSCIENCES 13 4 913 - 923 2016年 [査読有り][通常論文]
     
    Recent studies indicate an increase in atmospheric turbulence in the Chukchi Sea due to the recent drastic sea-ice reduction during summer months. The importance of the effects of this atmospheric turbulence on the marine ecosystem in this region, however, is not fully understood. To evaluate the effects of atmospheric turbulence on the marine ecosystem, high-frequency sampling (daily) from five layers of the microplankton community between 0 and 30 m at a fixed station in the Chukchi Sea from 10 through 25 September 2013 was conducted. During the study period, a strong wind event (SWE) was observed on 18 and 19 September. The abundance of microplankton was 2.6 to 17.6 cells mL(-1), with a maximum abundance being reported at 20 m on 22 September, while diatoms were the most dominant taxa throughout the study period. The abundance of diatoms, dinoflagellates and ciliates ranged between 1.6 and 14.1, 0.5 and 2.4 and 0.1 and 2.8 cells mL(-1), respectively. Diatoms belonging to 7 genera consisting of 35 species (Cylindrotheca closterium and Leptocylindrus danicus were dominant), dinoflagellates belonging to 7 genera consisting of 25 species (Prorocentrum balticum and Gymnodinium spp. were dominant) and ciliates belonging to 7 genera consisting of 8 species (Strobilidium spp. and Strombidium spp. were dominant) were identified. Within the microplankton species, there were 11 species with abundances that increased after the SWE, while there was no species with an abundance that decreased following the SWE. It is conjectured that atmospheric turbulences, such as that of an SWE, may supply sufficient nutrients to the surface layer that subsequently enhance the small bloom under the weak stratification of the Chukchi Sea Shelf during the autumn months. After the bloom, the dominant diatom community then shifts from centric-dominated to one where centric/pennate are more equal in abundance.
  • Kohei Matsuno, Atsushi Yamaguchi, Amane Fujiwara, Jonaotaro Onodera, Eiji Watanabe, Naomi Harada, Takashi Kikuchi
    JOURNAL OF NATURAL HISTORY 49 45-48 2711 - 2726 2015年10月 [査読有り][通常論文]
     
    Winter ice cover of the Arctic Ocean makes year-round zooplankton sampling by plankton net a difficult task. Therefore, the collection of copepods with a sediment trap can be a powerful tool. In the present study, we analysed the seasonal changes in the population structures of five dominant planktonic copepods (Oncaea parila, Calanus hyperboreus, Metridia longa, Paraeuchaeta glacialis and Heterorhabdus norvegicus), which were collected using a sediment trap rotated at 10-15day intervals moored at 184-260m in the Northwind Abyssal Plain (75 degrees 00N, 162 degrees 00W) of the western Arctic Ocean from October 2010 to September 2012. Oncaea parila C6F with egg sacs occurred throughout the year, and the total abundance and composition of early copepodid stages (C1-C3) had two peaks each year. Calanus hyperboreus was dominated by C6F throughout the year, and their maturation was observed during February to May. Metridia longa C6F had a clear seasonality in lipid accumulation and gonad maturation: high lipid accumulation was observed from October to February, whereas gonad maturation occurred from March to September. Paraeuchaeta glacialis C6F also showed seasonality in lipid accumulation and gonad maturation, although their seasonal patterns varied from those of M. longa: high lipid individuals were abundant from February to April and mature individuals dominated from October to November. Heterorhabdus norvegicus showed seasonal changes in population structure as well: C1, C5, and C6M dominated from April to May, November to February and August to October, respectively. The life cycle patterns of these species are compared with those reported from other areas. While the results obtained by a sediment trap are inevitably subject to collection bias (i.e. passive collection at a fixed depth), a sediment trap should be considered as a powerful tool for the evaluation of the life cycle of planktonic copepods, especially in ice-covered oceans.
  • 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  2015年09月 [査読有り][通常論文]
  • Ershova, E.A, R.R. Hopcroft, K.N. Kosobokova, K. Matsuno, R.J. Nelson, A. Yamaguchi, L.B. Eisner
    Oceanography 28 3 100 - 115 2015年09月 [査読有り][通常論文]
     
    The Chukchi Sea pelagic ecosystem, which is finely tuned to the region's seasonal ice formation and retreat, has been undergoing dramatic oceanographic change related to shifting sea ice cover and increasing temperatures over the last decades. We examine historical data sets on zooplankton communities in the central Chukchi Sea during the time period 1946 to 2012. Analysis is confounded by differences between years in terms of spatial coverage, seasonal variability, and methodology; nonetheless, trends remain detectable when a sufficient number of study years is compiled. In addition to high levels of interannual variability, we demonstrate that there have been significant increases in zooplankton biomass and abundance in recent years compared to historical studies, along with shifting distribution ranges for several key species. This signal is most pronounced for the copepods, particularly Calanus glacialis, which appears to be indirectly benefiting from warming of the region. While summer zooplankton communities of the Chukchi Sea have been primarily Bering-Pacific in character for as long as records exist, continuing warming and ice loss are increasing the influence of Bering-Pacific fauna within the Chukchi region.
  • Kohei Matsuno, Atsushi Yamaguchi, Toru Hirawake, Shigeto Nishino, Jun Inoue, Takashi Kikuchi
    POLAR BIOLOGY 38 7 1075 - 1079 2015年07月 [査読有り][通常論文]
     
    The species composition of Arctic zooplankton differs greatly from that of the zooplankton of the North Pacific and Bering Sea. Particularly with greater warming from sea-ice retreat, the reproduction of North Pacific species transported into the Chukchi Sea and beyond may lead to changes in the Arctic pelagic ecosystem. We report the egg production and hatching of the Pacific copepod Neocalanus flemingeri in the Chukchi Sea based on shipboard experiments performed in September 2013. The reproductive capability of N. flemingeri observed in the Chukchi Sea resembled that reported in the Pacific, with the exception of a lower hatching success. Only 7.5 % of N. flemingeri eggs hatched compared with 93 % in Pacific experiments. Low hatching success is considered to be caused by failures of fertilization. The potential recruitment number for N. flemingeri suggests that it is unlikely to establish expatriate Arctic populations in the near future.
  • Daichi Arima, Kohei Matsuno, Atsushi Yamaguchi, Takahiro Nobetsu, Ichiro Imai
    CRUSTACEANA 88 12-14 1307 - 1321 2015年 [査読有り][通常論文]
     
    The seasonal and inter-annual changes in the asymmetry of female insemination and the male leg 5 of the planktonic calanoid copepods Metridia okhotensis and M. pacifica were investigated in the Okhotsk Sea. An inter-species comparison of both parameters was also carried out on seven Metridia species collected from oceans throughout the world. For M. okhotensis from the Okhotsk Sea, most of the females showed left-side insemination (annual average: 95.7%) and most of the males showed left-side asymmetry (99.7%) of the long inner process of the second exopodal segment in the fifth leg throughout the year. However, sympatric M. pacifica showed different ratios of asymmetry for female insemination and male morphotypes with a left : right = 1 : 2 ratio throughout the year. For the seven Metridia species from the global oceans treated in this study, ratios of asymmetry for female insemination and male morphotypes were correlated with each other. One-sided insemination (i.e., only left or only right insemination) was a common pattern for various Metridia species from global oceans, but their ratios varied by species. Previously, low hatching rates (29-68%) of eggs were reported for various Metridia spp. in laboratory experiments, but the reasons for these low rates were unclear. Because each spermatheca of Metridia spp. is connected to the oviduct on the same side, either left or right, this suggests that half of the eggs produced by unilaterally inseminated females remain unfertilized. The morphology of the genital structures and literature data of the egg hatching rates of Metridia spp. indicate that almost half of the eggs produced by females are not viable and are, thus, wasted.
  • K. Matsuno, A. Yamaguchi, S. Nishino, J. Inoue, T. Kikuchi
    BIOGEOSCIENCES 12 13 4005 - 4015 2015年 [査読有り][通常論文]
     
    To evaluate the effect of atmospheric turbulence on a marine ecosystem, high-frequency samplings (two to four times per day) of a mesozooplankton community and the gut pigment of dominant copepods were performed at a fixed station in the Chukchi Sea from 10 to 25 September 2013. During the study period, a strong wind event (SWE) was observed on 18 September. After the SWE, the biomass of chlorophyll a (Chl a) increased, especially for micro-size (> 10 mu m) fractions. The zooplankton abundance ranged from 23 610 to 56 809 ind.m(-2) and exhibited no clear changes as a result of the SWE. In terms of abundance, calanoid copepods constituted the dominant taxa (mean: 57 %), followed by barnacle larvae (31 %). Within the calanoid copepods, small-sized Pseudocalanus spp. (65 %) and large-sized Calanus glacialis (30 %) dominated. In the population structure of C. glacialis, copepodid stage 5 (C5) dominated, and the mean copepodid stage did not vary with the SWE. The dominance of accumulated lipids in C5 and C6 females with immature gonads indicated that they were preparing for seasonal diapause. The gut pigment of C. glacialis C5 was higher at night and was correlated with ambient Chl a, and a significant increase was observed after the SWE (2.6 vs. 4.5 ng pigment ind.(-1)). The grazing impact by C. glacialis C5 was estimated to be 4.14 mgC m(-2) day(-1), which corresponded to 0.5-4.6% of the biomass of the micro-size phytoplankton. Compared with the metabolic food requirement, C. glacialis feeding on phytoplankton accounted for 12.6% of their total food requirement. These facts suggest that C. glacialis could not maintain their population by feeding solely on phytoplankton and that other food sources (i.e., microzooplankton) must be important in autumn. As observed by the increase in gut pigment, the temporal phytoplankton bloom, which is enhanced by the atmospheric turbulence (SWE) in autumn, may have a positive effect on copepod nutrition.
  • Kaede Sato, Kohei Matsuno, Daichi Arima, Yoshiyuki Abe, Atsushi Yamaguchi
    ZOOLOGICAL STUDIES 54 18 2015年01月 [査読有り][通常論文]
     
    Background: An optical plankton counter (OPC) was used to examine spatial and temporal changes in the zooplankton size spectra in the neighboring waters of Japan from May to August 2011. Results: Based on the zooplankton biovolume of equivalent spherical diameter (ESD) in 45 bins for every 0.1 mm between 0.5 and 5.0 mm, a Bray-Curtis cluster analysis classified the zooplankton communities into six groups. The geographical distribution of each group varied from each of the others. Groups with a dominance of 4 to 5 mm ESD were observed in northern marginal seas (northern Japan Sea and Okhotsk Sea), while the least biovolume with a dominance of a small-size class (0.5 to 1 mm) was observed for the Kuroshio extension. Temporal changes were observed along the 155 degrees E line, i.e., a high biovolume group dominated by 2 to 3 mm ESD during May shifted to other size spectra groups during July to August. These temporal changes were caused by the seasonal vertical descent of dominant large Neocalanus copepods during July to August. As a specific characteristic of the normalized biomass size spectra (NBSS), the slope of NBSS was moderate (-0.90) for the Neocalanus dominant spring group but was at -1.11 to -1.24 for the other groups. Theoretically, the slope of the NBSS of the stable marine ecosystem is known to settle at approximately -1. Conclusions: Based on the analysis by OPC, zooplankton size spectra in the neighboring waters of Japan were separated into six groups. Most groups had -1.11 to -1.24 NBSS slopes, which were slightly higher than the theoretical value (-1). However, one group had a moderate slope of NBSS (-0.90) caused by the dominance of large Neocalanus copepods.
  • Atsushi Yamaguchi, Kohei Matsuno, Tomoe Homma
    ZOOLOGICAL STUDIES 54 13 2015年01月 [査読有り][通常論文]
     
    Background: Despite its ecological importance, little information is available regarding the spatial and vertical changes in the calanoid copepod community over large geographical regions. This study investigated the spatial and vertical patterns in calanoid copepod abundance and community structure using zooplankton samples collected between depths of 0 and 2,615 m across the North Pacific from 0 degrees to 56 degrees N. Results: A total of 211 calanoid copepod species belonging to 66 genera and 24 families were identified. Calanoid copepod abundance decreased with increasing depth, and few latitudinal differences were detected. Across the entire region, species diversity peaked near 500 to 2,000 m in depth. The calanoid copepod community was separated into seven groups with distinct spatial and vertical distributions. For all groups, the number of species was low (28 to 37 species) in the subarctic region (north of 40 degrees N) and high (116 to 121 species) in the subtropical-tropical region. The deepest group in the subtropical-tropical region was composed of cosmopolitan species, and this group was also observed in deep water in the subarctic region. Conclusions: In deep water, most of the calanoid copepod community consisted of cosmopolitan species, while an endemic community was observed in the subarctic region. Because the food of deep-sea calanoid copepods originates from the surface layer, sufficient and excess flux in the eutrophic subarctic region may be responsible for maintaining the endemic species in the region.
  • Atsushi Yamaguchi, Kohei Matsuno, Yoshiyuki Abe, Daichi Arima, Kohei Ohgi
    DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 91 115 - 124 2014年09月 [査読有り][通常論文]
     
    To identify seasonal patterns of change in zooplankton communities, an optical plankton counter (OPC) and microscopic analysis were utilised to characterise zooplankton samples collected from 0 to 150 m and 0 to 500 m in the Oyashio region every one to three months from 2002 to 2007. Based on the OPC measurements, the abundance and biomass of zooplankton peaked in June (0-150 m) or August (150-500 m), depending on the depth stratum. The peak periods of the copepod species that were dominant in terms of abundance and biomass indicated species-specific patterns. Three Neocalanus species (Neocalanus cristatus, Neocalanus flemingeri and Neocalanus plumchnis) exhibited abundance peaks that occurred before their biomass peaks, whereas Eucalanus bungii and Metridia pacifica experienced biomass peaks before their abundance peaks. The abundance peaks corresponded to the recruitment periods of early copepodid stages, whereas the biomass peaks corresponded to the periods when the dominant populations reached the late copepodid stages (C5 or C6). Because the reproduction of Neocalanus spp. occurred in the deep layer ( > 500 m), their biomass peaks were observed when the major populations reached stage C5 after the abundance peaks of the early copepodid stages. The reproduction of E. bungii and M. paafica occurred near the surface layer. These species first formed biomass peaks of C6 and later developed abundance peaks of newly recruited early copepodid stages. From the comparison between OPC measurements and microscopic analyses, seasonal changes in zooplankton biomass at depths of 0-150 m were governed primarily by E. bungii and M. pacifica, whereas those at depths of 150-500 m were primarily caused by the three Neocalanus species. (C) 2014 Elsevier Ltd. All rights reserved.
  • Kohei Matsuno, Mutsuo Ichinomiya, Atsushi Yamaguchi, Ichiro Imai, Takashi Kikuchi
    POLAR BIOLOGY 37 8 1185 - 1195 2014年08月 [査読有り][通常論文]
     
    The western Arctic Ocean is composed of two regions: the southern shelf and the northern basin, whereas the marine ecosystem structure is expected to vary between the regions, little information is available, particularly for the planktonic protist community. In this study, we surveyed the horizontal distribution of microprotists (diatoms, dinoflagellates and ciliates) at 59 stations in the western Arctic Ocean during September and October of 2010. The abundances of diatoms, dinoflagellates and ciliates were 0-138,640, 0-16,460 and 0-10,933 cells L-1, respectively, and all of the abundances were higher on the Chukchi Sea shelf. Cluster analysis based on abundance separated the microprotist community into five groups, which contain 25, 22, 6, 4 and 2 stations. The largest group was observed on the Chukchi Sea shelf, showing a high abundance predominated by diatoms (78 % of total abundance). The second group was observed from the East Siberian Sea to the Canada Basin, characterised by low abundance and ciliate dominance (36 % of total abundance). Because of the high abundance and predominance of diatoms, the former group is characterised by eutrophic waters, which are enhanced by the continuous inflow of the nutrient-rich Pacific Water through the Bering Strait. Due to the low abundance and the dominance of ciliates, the latter group is dominated by organisms of the microbial food web. The remaining three groups were smaller and located between the two large groups. The distribution of these three groups may be based on complex physical structures, such as the anticyclonic eddy near the shelf break.
  • 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  2014年05月 [査読有り][通常論文]
     
    The future conditions of Arctic sea ice and marine ecosystems are of interest not only to climate scientists, but also to economic and governmental bodies. However, the lack of widespread, year-long biogeochemical observations remains an obstacle to understanding the complicated variability of the Arctic marine biological pump. Here we show an early winter maximum of sinking biogenic flux in the western Arctic Ocean and illustrate the importance of shelf-break eddies to biological pumping from wide shelves to adjacent deep basins using a combination of year-long mooring observations and three-dimensional numerical modelling. The sinking flux trapped in the present study included considerable fresh organic material with soft tissues and was an order of magnitude larger than previous estimates. We predict that further reductions in sea ice will promote the entry of Pacific-origin biological species into the Arctic basin and accelerate biogeochemical cycles connecting the Arctic and subarctic oceans.
  • 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 2014年03月 [査読有り][通常論文]
     
    To examine seasonal changes in the mesozooplankton community, analyses were made on the swimmer samples (>1 mm) collected by a sediment trap mooring at 184 m depth on the Northwind Abyssal Plain in the western Arctic Ocean during October 2010-September 2011. The zooplankton swimmer flux ranged from 5 to 44 ind. m(-2) day(-1) and was greater during July to October; copepods were the dominant taxon. Based on the zooplankton swimmer flux, cluster analysis classified samples into three groups (A, B-1 and B-2). The occurrence of each group showed clear seasonality; group A was observed during July to October, group B-1 was seen in November to January and group B-2 during March to June. The seasonal variability in population structures of four dominant copepod swimmers was clearly different between the species. Most Calanus hyperboreus were copepodid stage 6 female (C6F) throughout the year. For Metridia longa and Paraeuchaeta glacialis, C6Fs dominated during January to May, and early copepodid stages increased during June to October. Heterorhabdus norvegicus was dominated by stage C5 during November to February, and C6F/M during March to May. Since Pacific copepods (Neocalanus cristatus) occurred in significant number during August-September, possible causes are discussed.
  • Daichi Arima, Atsushi Yamaguchi, Yoshiyuki Abe, Kohei Matsuno, Rui Saito, Hiroki Asami, Hiroshi Shimada, Ichiro Imai
    CRUSTACEANA 87 3 364 - 375 2014年03月 [査読有り][通常論文]
     
    Seasonal changes in body size (prosome length: PL) and oil sac volume (OSV) of the three most numerically abundant copepods in Ishikari Bay, northern Sea of Japan, Paracalanus parvus (Claus, 1863), Pseudocalanus newmani Frost, 1989 and Oithona similis Claus, 1866, were studied using monthly samples collected through vertical hauls of a 100-mu m mesh NORPAC net from March, 2001 to May, 2002. Seasonal changes in PL were common for the three species and were more pronounced during a cold spring. PL was negatively correlated with temperature, and this relationship was described well using the Belehradek equation. Seasonal changes in OSV exhibited a species-specific pattern, i.e., OSV was greater during a warm summer for P. parvus and was greater during a cold spring for P. newmani and O. similis. The OSV peak period corresponded with the optimal thermal season of each species. The relative OSV to prosome volume of the small copepods (0.6-0.8%) was substantially lower than that of the large copepods (20-32%). These facts suggest that the oil sac of small copepods is not used for overwintering or diapauses or during periods of food scarcity, but is instead used as the primary energy source for reproduction, which occurs during the optimum thermal season of each species.
  • Atsushi Yamaguchi, Tomoe Homma, Rui Saito, Kohei Matsuno, Hiromichi Ueno, Toru Hirawake, Ichiro Imai
    Plankton and Benthos Research 8 3 116 - 123 2014年 [査読有り][通常論文]
     
    Stratified zooplankton sampling was conducted in the subarctic Pacific in June 2009 at four stations along 47°N from 0 to 3,000 m depth to evaluate longitudinal changes in population structure and vertical distribution of the dominant copepod species. At the westernmost station (160°E), the population structure of Eucalanus bungii and Metridia pacifica was dominated by early copepodid stages. In E. bungii, nauplii were abundant and adult females had developed ovaries at 160°E, while at the three stations to the east (167°E, 174°E and 179°W), no E. bungii nauplii were collected, and the resting stages were dominant. This suggests the species was reproducing near 160°E and in diapause in the east. In all three Neocalanus species analyzed (N. cristatus, N. flemingeri and N. plumchrus), late copepodid stages were dominant at the eastern three stations. Lipid accumulation in the fifth copepodid stage of Neocalanus spp. was greater in the west than in the east. This probably resulted from better food conditions and lower temperatures in the west, where copepods could consume more food during development than in the east.
  • Yoshiyuki Abe, Masafumi Natsuike, Kohei Matsuno, Takeshi Terui, Atsushi Yamaguchi, Ichiro Imai
    JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY 449 321 - 329 2013年11月 [査読有り][通常論文]
     
    The assimilation efficiency of zooplankton is an essential parameter required to estimate energy transfer to higher trophic levels in marine ecosystems. However, little information is available for large oceanic copepods, especially the Neocalanus and Eucalanus species dominant in the subarctic Pacific. In this study, the assimilation efficiencies of the C5 stages of Neocalanus cristatus, Neocalanus flemingeri and Eucalanus bungii were evaluated using eight phytoplankton species as food. The average assimilation efficiencies of N. cristatus, N. flemingeri and E. bungii ranged between 45 and 66%, 44 and 66% and 34 and 65%, respectively. The assimilation efficiency was highly variable depending on the food phytoplankton species. In all species, the assimilation efficiency showed a significant negative relationship with the ash content of the phytoplankton (r(2) = 0.79-0.87, p<0.001). The assimilation efficiency of large-body sized N. cristatus for large-sized diatoms was higher than for the other copepod species. In population models of N. cristatus, changes in assimilation efficiency affect the growth and survival rates of the population. The Lagrangian ensemble model (LEM) for N. cristatus showed that, for assimilation efficiencies less than 57%, the population could not be maintained. Because variations in assimilation efficiency may have significant effects on the copepod population, their variability should be incorporated into marine ecosystem models in the future. (C) 2013 Elsevier B.V. All rights reserved.
  • 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 2013年10月 [査読有り][通常論文]
     
    Information on diatom resting stages is fundamentally important to understanding the population dynamics of diatoms including bloom formation. The distribution of viable diatom resting stage cells in bottom sediments of the eastern Bering Sea in July 2009 was investigated by the most probable number (MPN) method. The abundances of diatom resting stage cells ranged from 1.7 x 10(3) to 1.2 x 10(6) MPN cells cm(-3) wet sediment, comparable to those in shallow eutrophic areas where diatom blooms frequently occur. Common species during the spring phytoplankton bloom in the eastern Bering Sea were also dominant in sediments as resting stage cells. It should be noted that relatively high numbers of ice algae species, especially ribbon-shaped chain forming pennate diatoms, were found in the sediments. The life cycle strategy using resting stage cells allows planktonic and ice algal species to survive unfavorable environmental conditions such as the dark winter season, and potentially contribute to form blooms of several types (subsurface of ice, ice edge, plankton) through vertical mixing. (C) 2013 Elsevier Ltd. All rights reserved.
  • 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 2013年10月 [査読有り][通常論文]
     
    On the southeastern Bering Sea shelf, mesozooplankton plays an important role in material transfer between primary producers and fisheries resources. The biomass of mesozooplankton in this region is known to vary annually, but little is known about annual changes in community structure and species composition. In the present study, regional and long-term changes in abundance, biomass and community structure of copepods and chaetognaths on the shelf were evaluated based on NORPAC net samples collected during summers of 1994-2009. During the study period, regime shifts occurred from high interannual variability regime (1994-1999) to low interannual variability regime with high temperature (2000-2005), then to a low interannual variability regime with low temperature (2007-2009). A total of 24 calanoid copepod species belonging to 21 genera were identified from samples. Copepod abundance ranged from 150 to 834,486 inds. m(-2), was greatest on the Middle shelf, and was higher in cold years, than in warm years. Copepod biomass ranged from 0.013 to 150 g DM m(-2), and was also higher in cold years than in warm years. Based on the results of cluster analysis, the copepod community was divided into six groups (A-F). The regional and interannual distributions of each group were distinct. Interannual changes in abundance of the dominant copepod on the Outer shelf and Middle shelf were highly significant (p < 0.0001), and their abundances were negatively correlated with temperature and salinity. Interannual changes in copepod community that occurred between cold and warm years are thought to have been caused by differences in the magnitude and timing of the spring phytoplankton bloom between the two regimes. Abundance and biomass of the chaetognath Parasagitta elegans ranged from 30 to 15,180 inds. m(-2) and from 11 to 1559 mg DM m(-2), respectively. Chaetognath abundance was significantly correlated with the abundance of the dominant copepods (p < 0.0001). Differences in cold and warm years may also affect recruitment of walleye pollock. We conclude that on the southeastern Bering Sea shelf, the magnitude and timing of primary production, which is related to climate change, may significantly affect how it is transferred through the food web. (C) 2013 Elsevier Ltd. All rights reserved.
  • Masafumi Natsuike, Satoshi Nagai, Kohei Matsuno, Rui Saito, Chiko Tsukazaki, Atsushi Yamaguchi, Ichiro Imai
    HARMFUL ALGAE 27 52 - 59 2013年07月 [査読有り][通常論文]
     
    Abundance and distribution of the toxic dinoflagellate Alexandrium tamarense species complex resting cyst were investigated in the eastern Bering Sea and the Chukchi Sea for the first time. Sediment samples (top 0-3 cm depth) were collected from the continental shelf of the eastern Bering Sea (17 stations) and the Chukchi Sea (13 stations) together with a long core sample (top 0-21 cm depth) from one station in the Chukchi Sea during 2009-2012. The cysts were enumerated using the primuline staining method. Species identification of the cysts was carried out with multiplex PCR assay and the plate morphology of vegetative cells germinated from cysts in the both areas. Alexandrium cysts were widely detected in the both areas, ranging from not detected (<1 cysts cm(-3)) to 835 cysts cm(-3) wet sediment in the eastern Bering Sea and from not detected (<1 cysts cm(-3)) to 10,600 cysts cm(-3) in the Chukchi Sea, and all isolated cysts were genetically and morphologically identified as the North American clade A. tamarense. Their cysts were mainly distributed in the shallow continental shelf where the water depth was less than 100 m in both areas. The cysts were detected from the deep layer (18-21 cm depth of sediment core) of the long core sample. The present study confirmed the abundant existence of A. tamarense with wide range of distribution in these areas. This fact suggests that A. tamarense vegetative cells have appeared in the water column in the both areas. Furthermore, these abundant cyst depositions indicate that this species originally distributed in the Arctic and subarctic regions and well adapted to the environments in the marginal ice zone. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.
  • Kana Chikugo, Atsushi Yamaguchi, Kohei Matsuno, Rui Saito, Ichiro Imai
    CRUSTACEANA 86 4 449 - 474 2013年04月 [査読有り][通常論文]
     
    Pelagic Mysidacea and Decapoda have important roles in marine ecosystems. However, information on their life histories is extremely limited. This study aimed to evaluate the life cycles of pelagic Mysidacea and Decapoda in the Oyashio region, Japan. Production of the four dominant species was estimated by combining body mass (DM) data and abundance data Mysidacea belonging to 5 species from 5 genera occurred in the study area. Their abundance and biomass ranged between 11.7-50.1 ind. m(-2) and 1.2-7.9 g wet mass (VIM) m(-2), respectively. Six species from 6 genera belonged to Decapoda, and their abundance and biomass ranged between 9.0-17.3 ind. M-2 and 3.0-17.3 g WM M-2, respectively. Based on body length histograms, there were two to four cohorts for the three dominant mysids and one dominant decapod on each sampling date. Life histories of the two numerically dominant mysids (Eucopia australis and Boreomysis californica) followed similar patterns: recruitment of young in May, strong growth from April to June, and a longevity of three years. Life cycles of the two minor species (the mysid Meterythrops microphthalma and the decapod Hymenodora frontalis) were not clear because of their low abundance. The timing of recruitment of the young and the strong juvenile growth for the two dominant mysids corresponds with the season when their prey is abundant. The annual production of the dominant mysid species was 14.0 mg DM M-2 (B. californica) and 191.8 mg DM m(-2) (E. australis). Annual production/biomass (P / B) ratios ranged between 0.242 (H. frontalis) and 0.643 (M. microphthalma). Compared with other regions, the Oyashio region showed high production and low P / B ratios. The high production in the Oyashio region may be related to the high biomass of these species. Because of the low temperature conditions (3 degrees C), pelagic mysids and decapods in the Oyashio region may have slower growth, longer generation times and lower P / B ratios than in other oceans.
  • Kohei Matsuno, Atsushi Yamaguchi, Ichiro Imai
    ICES JOURNAL OF MARINE SCIENCE 69 7 1205 - 1217 2012年09月 [査読有り][通常論文]
     
    An optical plankton counter was used to examine the regional characteristics of the zooplankton communities in the Chukchi Sea during the summers of 1991, 1992, 2007, and 2008. Zooplankton abundance and biomass ranged from 5000 to 1 170 000 ind. m(-2) and 0.2 to 10.9 g dry mass m(-2), respectively. Based on zooplankton biovolume in equivalent spherical diameter (ESD) in 48 bins, one every 0.1 mm between 0.25 and 5.0 mm, a Bray-Curtis cluster analysis classified zooplankton communities into four groups (A-D). No changes were observed in zooplankton communities south of the Lisburne Peninsula (group A) throughout the 4 years, but there were differences north of the Peninsula, with group B (normal, intermediate biomass) observed in 1991/1992, group D (low biomass) in 2007, and group C (predominance of barnacle larvae) in 2008. Analysis of the normalized biomass size spectra for the groups indicated that groups A and C were very productive, so the zooplankton community south of the Lisburne Peninsula was consistently highly productive, which may be because of the continuous inflow of Pacific Water rich in nutrients. Zooplankton communities north of the Lisburne Peninsula varied greatly from year to year, which may be related to interannual changes in sea-ice extent.
  • Kohei Matsuno, Atsushi Yamaguchi, Koji Shimada, Ichiro Imai
    POLAR SCIENCE 6 1 105 - 119 2012年04月 [査読有り][通常論文]
     
    The horizontal distribution of the epipelagic zooplankton communities in the western Arctic Ocean was studied during August October 2008. Zooplankton abundance and biomass were higher in the Chukchi Sea, and ranged from 3,000 to 274,000 ind. m(-2) and 5-678 g WM m(-2), respectively. Copepods were the most dominant taxa and comprised 37-94% of zooplankton abundance. For calanoid copepods, 30 species belonging to 20 genera were identified. Based on the copepod abundance, their communities were classified into three groups using a cluster analysis. The horizontal distribution of each group was well synchronized with depth zones, defined here as Shelf, Slope and Basin. Neritic Pacific copepods were the dominant species in the Shelf zone. Arctic copepods were substantially greater in the Slope zone than the other regions. Mesopelagic copepods were greater in the Basin zone than the other regions. Stage compositions of large-sized Arctic copepods (Calanus glacialis and Metridia longa) were characterized by the dominance of late copepodid stages in the Basin. Both the abundance and stage compositions of large copepods corresponded well with Chl. a concentrations in each region, with high Chl. a in the Shelf and Slope supporting reproduction of copepods resulting in high abundance dominated by early copepodid stages. (C) 2012 Elsevier B.V. and NIPR. All rights reserved.
  • Jumpei Fukuda, Atsushi Yamaguchi, Kohei Matsuno, Ichiro Imai
    Plankton and Benthos Research 7 2 64 - 74 2012年 [査読有り][通常論文]
     
    To evaluate zooplankton interannual and latitudinal changes, Optical Plankton Counter analyses were made on preserved net zooplankton samples collected by NORPAC net from 0-150 m at 35°N-51°N stations along 180° in the central North Pacific during early-mid June 1981-2000. The mean numerical abundance of total zooplankton for the 20 years varied latitudinally from 19,200 to 84,300 ind. m-2but the differences between the three oceanic domains were not significant. However, highly significant latitudinal changes were observed in the mean zooplankton biomass, which ranged from 1.44 to 13.2 mg dry mass m-2with higher values in the Transitional Domain (TR) than in the Subarctic and Subtropical Domains. The high biomass in the TR was caused by the dominance of large-sized zooplankton with equivalent spherical diameters (ESD) of 2-4 mm, regarded to consist mainly of Neocalanus spp. C5. Both the slope and intercept of the Normalized Biomass Size Spectrum also showed significant latitudinal changes with a moderate slope and low intercept in the TR due to the dominance of large zooplankton with 2-4 mm ESD in biomass. In contrast to these large latitudinal changes, only limited interannual variations were observed for zooplankton abundance and biomass in the central North Pacific during the study period. © 2012, The Plankton Society of Japan, The Japanese Association of Benthology. All rights reserved.
  • Kohei Matsuno, Atsushi Yamaguchi, Toru Hirawake, Ichiro Imai
    POLAR BIOLOGY 34 9 1349 - 1360 2011年09月 [査読有り][通常論文]
     
    A recent drastic decrease in sea ice cover area was observed in the western Arctic Ocean during summer, yet little information is available for its effect on zooplankton community. To evaluate the effect of sea ice reduction on zooplankton, we studied year-to-year changes of zooplankton community structure in the Chukchi Sea during summers of 1991, 1992 (when sea ice extended), 2007, and 2008 (when sea ice reduced). Zooplankton abundance ranged from 4,000 to 316,000 ind. m(-2) (mean: 70,000) and was greater north of Lisburne Peninsula in 2008. Zooplankton biomass ranged from 0.07 to 286 g wet mass m(-2) (mean: 36) and was greater south of Lisburne Peninsula in 2007. Cluster analysis based on zooplankton abundance showed a division of the zooplankton community into four groups. Occurrence of each group was separated geographically and interannually, and geographic distributions of each group in 1991 and 1992 were similar but those in 2007 and 2008 were shifted northward. Abundance and biomass in 2007/2008 were higher than in 1991/1992, indicating that further sea ice reduction would have a positive effect on zooplankton production (e.g. invasion of large Pacific species and temperature effects on their growth rate). The northern shift in geographic distribution of the zooplankton community in 2007/2008 indicates that sea ice reduction would have a negative effect on the zooplankton community (loss of characteristic Arctic species) in part of the Chukchi Sea. These apparently contradictory effects of sea ice reduction on zooplankton community emphasize the critical need for continued monitoring in this area.
  • Kohei Matsuno, Atsushi Yamaguchi
    Plankton and Benthos Research 5 4 123 - 130 2010年 [査読有り][通常論文]
     
    Zooplankton abundance and biomass along 165°E and 165°W in the North Pacific were estimated using an optical plankton counter on preserved samples collected with a plankton net of 335μ m mesh-size from 0-150 m at 89 stations from the subarctic to subtropical regions during the summers of 2003-2006 the stations were grouped into subarctic (SA), transitional (TR) and subtropical (ST) regions for latitudinal comparisons. The two-way ANOVA and a post hoc test showed that total abundance and biomass were significantly larger in SA and smaller in ST stations, respectively, than in the other regions, but were not significantly different between 165°E and 165°W. Total ranges of abundance and biomass were: 34×103-65×103 indiv. m-2 and 2.9-7.9 g dry mass m-2, respectively. The variation in abundance was mainly governed by the variation of 0.34-1.00 mm equivalent spherical diameter (ESD) size class zooplankton, but total biomass variations were due mainly to the 2.00-3.00 mm ESD size class, which corresponds to the calanoid copepod Neocalanus spp. copepodid stage 5 (C5) that had a greater abundance in SA and TR than in ST. Despite possibly higher abundances of Neocalanus C5 in TR than in SA, abundance and biomass of the 2.00-3.00mm ESD size class were not significantly different between the two regions. Size reduction of individuals due to higher temperatures in TR than in SA may be a possible explanation. © The Plankton Society of Japan.
  • Kohei Matsuno, Hye Seon Kim, Atsushi Yamaguchi
    Plankton and Benthos Research 4 4 154 - 159 2009年 [査読有り][通常論文]
     
    Size-fractionated (0.25, 0.5, 1, 2, and 4 mm mesh size) wet mass (WM) and dry mass (DM) determinations and optical plankton counter (OPC) measurements were carried out on zooplankton samples collected at 15 stations in the northern North Pacific Ocean, Bering Sea and Chukchi Sea during July-August 2007. The total sampleWM and DM estimated from OPC data corresponded closely to those of measured values by a factor of 0.970-1.098. However when the sample was portioned into different size groups, estimates of size-fractionated WM and DM by OPC data varied from measured masses by a factor of between 0.202 and 1.768. The high variability was caused by an underestimation of sizes of the large sized (< mm) fraction, or an overestimation of the number of the small size fraction (2-4 mm). The underestimation in the < mm and overestimation in the 2-4 mm respectively were caused by the dominance of transparent hydromedusae, and slender-shaped euphausiids in the < mm fraction. This study suggests that OPC analysis could be susceptible to errors in zooplankton biomass estimates in the large size fraction (< mm) especially when euphausiids and hydromedusae dominate the population. On the other hand, OPC based estimates of DM within 0.25-4 mm size fraction are more robust, which may be due to the dominance of large copepods, and low detritus content in the samples from the oceanic subarctic Pacific, in summer 2007. © 2009, The Plankton Society of Japan, The Japanese Association of Benthology. All rights reserved.

書籍

  • プランクトンは海の語り部 ~変わりゆく極域~
    松野孝平 (担当:単著)
    海文堂出版 2020年09月
  • 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 (担当:共著)
    海文堂出版 2019年08月
  • 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 (担当:分担執筆範囲:小さな生き物から地球を知る)
    海文堂出版 2018年08月
  • 低温環境の科学辞典
    松野孝平 (担当:分担執筆範囲:北極の動物プランクトン)
    朝倉書店 2016年07月

その他活動・業績

受賞

  • 2018年05月 日本海洋学会 日本海洋学会岡田賞
     
    受賞者: 松野孝平
  • 2017年03月 日本プランクトン学会 日本プランクトン学会奨励賞
     
    受賞者: 松野孝平
  • 2016年03月 国立極地研究所 GRENE北極気候変動研究 若手賞
     
    受賞者: 松野孝平
  • 2013年03月 北海道大学大学院水産科学院 伊藤一隆賞
     
    受賞者: 松野孝平
  • 2012年03月 2012年度日本海洋学会春季大会 ベストポスター賞
     
    受賞者: 松野孝平

共同研究・競争的資金等の研究課題

  • 餌生物の違いがカイアシ類の成長生産に与える影響に関する実験生態学的研究
    日本学術振興会:科研費 若手研究
    研究期間 : 2018年04月 -2021年03月 
    代表者 : 松野孝平
  • 海氷中の低次生態系の動態に関する研究
    北海道大学:平成31年度北極域研究共同推進拠点 共同推進研究
    研究期間 : 2019年04月 -2020年03月 
    代表者 : 松野孝平
  • 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
    公益財団法人水産無脊椎動物研究所:2019年度個別研究助成
    研究期間 : 2019年04月 -2020年03月 
    代表者 : 松野孝平
  • 季節海氷域における海氷期の生態系構造に関する研究
    北海道大学:平成30年度北極域研究共同推進拠点 共同推進研究
    研究期間 : 2018年04月 -2019年03月 
    代表者 : 松野孝平
  • 海外特別研究員
    日本学術振興会:
    研究期間 : 2016年04月 -2018年03月 
    代表者 : 松野孝平
  • 北極環境研究若手研究者派遣支援事業
    国立極地研究所:
    研究期間 : 2014年12月 -2014年12月 
    代表者 : 松野孝平
  • 特別研究員DC2
    日本学術振興会:
    研究期間 : 2011年04月 -2013年03月 
    代表者 : 松野孝平
  • 海外渡航援助
    日本海洋科学振興財団:
    研究期間 : 2012年02月 -2012年02月 
    代表者 : 松野孝平

教育活動情報

主要な担当授業

  • 一般教育演習(フレッシュマンセミナー)
    開講年度 : 2019年
    課程区分 : 学士課程
    開講学部 : 全学教育
    キーワード : 海洋環境、水圏生態、水産資源、海洋物理学、海洋化学、プランクトン、イカ、サバ
  • 海洋生物科学実験Ⅲ
    開講年度 : 2019年
    課程区分 : 学士課程
    開講学部 : 水産学部
    キーワード : 魚類、プランクトン、解剖、分類、形態、生態、生?、サケ
  • 水圏生物学
    開講年度 : 2019年
    課程区分 : 学士課程
    開講学部 : 水産学部
    キーワード : 学名、命名法、系統樹、分類体系、学術標本、種多様性
  • 洋上実習Ⅰ
    開講年度 : 2019年
    課程区分 : 学士課程
    開講学部 : 水産学部
    キーワード : 乗船実習 おしょろ丸 北太平洋西部 流し網 海洋観測 プランクトン 海水分析 サケ 外洋 生態系 目視調査 操船
  • 海洋生物科学Ⅱ
    開講年度 : 2019年
    課程区分 : 学士課程
    開講学部 : 水産学部
    キーワード : 海洋生態系、物質循環、プランクトン、ネクトン、ベントス
  • プランクトン学
    開講年度 : 2019年
    課程区分 : 学士課程
    開講学部 : 水産学部
    キーワード : プランクトン生物、分布、生態、生理、生産、化学組成、同化効率、成長効率、栄養動態、環境変動、?潮・?毒
  • 環境と人間
    開講年度 : 2019年
    課程区分 : 学士課程
    開講学部 : 全学教育
    キーワード : 海洋物理,海洋化学、海洋生態系,気候変化,プランクトン,ベントス,カレイ,サケ、深海魚、イカ・タコ類,鯨類,海鳥類,海獣類,衛星海洋学,人間活動,地球温暖化,海洋動物の保全・保護

大学運営

委員歴

  • 2020年09月 - 現在   PICES   Working Group 44: Joint PICES/ICES Working Group on Integrated Ecosystem Assessment for the Northern Bering Sea - Chukchi Sea (NBS-CS) Member
  • 2020年03月 - 現在   JCAR   北極域研究船利用計画WG 委員


Copyright © MEDIA FUSION Co.,Ltd. All rights reserved.