Estimation of marine primary production by integrating a bio-optical principle into satellite remote sensing image processing(Fostering Joint International Research)

• Project/Area Number: 15KK0020
• Research Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research)
• Allocation Type: Multi-year Fund
• Research Field: Environmental dynamic analysis
• Research Institution: Hokkaido University
• Principal Investigator: Hirata Takafumi 北海道大学, 北極域研究センター, 特任准教授 (80576231)
• Project Period (FY): 2016 – 2019
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
• Keywords: 基礎生産 / 一次生産 / 浮遊性藻類 / 多様性 / 北極海 / ラプテフ海 / CDOM / 植物プランクトン / 海色 / リモートセンシング / サイズ / 生物光学

Outline of Final Research Achievements

Group-specific primary production in marine environment was estimated using satellite remote sensing. Results show that diatom-specific primary production is highly dependent on its total chlorophyll abundance while cyanobacteria-specific primary production is much less dependent on its total chlorophyll abundance.
Thus, it was found that the diatom-specific chlorophyll could be used for estimation of its primary production, while the cyanobactreia-specific chlorophyll might not. Using a numerical model, group-specific diversity was estimated and compared to the chlorophyll derived from the satellite remote sensing. Many sub-species were required to explain the diatom-specific chlorophyll while much less sub-species were required to account for cyanobacteria-specific chlorophyll. As a result, we conclude that a certain relationship exists between the diatom-specific primary production and its diversity.

Academic Significance and Societal Importance of the Research Achievements

海洋における浮遊性藻類の基礎生産（光合成）と多様性は水産生物を含めた海洋生物生産において極めて重要であるが、どの浮遊性藻類によってどれだけの基礎生産が行われているかを広域海洋で効率的に測定しえる技術はなかった。本研究では、衛星リモートセンシング を用いた広域海洋観測から浮遊性藻類別の基礎生産を推定する手法を生物学的原理と衛星リモートセンシング で得られる画像処理技術を融合することで新規開発し、その結果を利用して基礎生産と多様性との間の関係の存在を明らかにした。

Research Products

• [Int'l Joint Research] アルフレッドウェゲナー研究所(ドイツ) (2019)
• [Int'l Joint Research] ブレーメン大学(ドイツ) (2018)
  • Year and Date: 2018-08-15
• [Int'l Joint Research] ブレーメン大学(ドイツ) (2017)
  • Year and Date: 2017-06-13
• [Journal Article] Satellite Ocean Colour: Current Status and Future Perspective (2019)
  • Author(s): Groom, S.B., S. Sathyendranath, Y. Ban, S. Bernard, R. Brewin, V. Brotas, C. Brockmann, P. Chauhan, J. -K. Choi, A. Chuprin, S. Ciavatta, P. Cipollini, C. Donlon, B. A. Franz, X. He, T. Hirata, et al.
  • Journal Title: Frontiers in Marine Science Volume: 6
  • DOI: 10.3389/fmars.2019.00485
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] GCOM-C/SGLI Ocean Standard Products and Early Validation Results (2019)
  • Author(s): Toratani, M., Hooker, S.B., Kiyomoto, Y., Murakami, H., Kurihara, Y., Hori,M., Waga, H., Yamashita, Y., Tanaka, A., Ogata,K., Suzuki, K., Ishizaka, J., Hirawake, T., Hirata, T., Isada, T., Higa, H., Kuwahara, V.S.
  • Journal Title: IEEE International Geoscience and Remote Sensing Symposium Volume: - Pages: 4741-4744
  • DOI: 10.1109/igarss.2019.8899897
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Biological data assimilation for parameter estimation of a phytoplankton functional type model for the western North Pacific (2018)
  • Author(s): Hoshiba Yasuhiro、Hirata Takafumi、Shigemitsu Masahito、Nakano Hideyuki、Hashioka Taketo、Masuda Yoshio、Yamanaka Yasuhiro
  • Journal Title: Ocean Science Volume: 14 Issue: 3 Pages: 371-386
  • DOI: 10.5194/os-14-371-2018
  • NAID: 120006488423
  • Peer Reviewed / Open Access
• [Journal Article] Distribution shifts of marine taxa in the Pacific Arctic under contemporary climate changes (2018)
  • Author(s): Alabia Irene D.、Garcia Molinos Jorge、Saitoh Sei-Ichi、Hirawake Toru、Hirata Takafumi、Mueter Franz J.
  • Journal Title: Diversity and Distributions Volume: 24 Issue: 11 Pages: 1583-1597
  • DOI: 10.1111/ddi.12788
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A synthesis of the North and South Atlantic Sub-Tropical Gyres and their response to environmental change during two decades of AMT (2017)
  • Author(s): Aiken, J., R.J.W., Brewin, F. Dufois, L. Polimene, N. Hardman-Mountford, T. Jackson, B. Loveday, S. Hoya, G. Dall’Olmo, J. Stephens, T. Hirata
  • Journal Title: Progress in Oceanography Volume: 158 Pages: 236-254
  • DOI: 10.1016/j.pocean.2016.08.004
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Competition and community assemblage dynamics within a phytoplankton functional group: Simulaton using an eddy-resolving model to disentangle deterministic and random effects (2017)
  • Author(s): Masuda, Y., Y. Yamanaka, T. Hirata, H. Nakano
  • Journal Title: Ecological Modelling Volume: 343 Pages: 1-14
  • DOI: 10.1016/j.ecolmodel.2016.10.015
  • Peer Reviewed
• [Journal Article] A Consumer's Guide to Satellite Remote Sensing of Multiple Phytoplankton Groups in the Global Ocean (2017)
  • Author(s): C. B. Mouw, N. J. Hardman-Mountford, S. Alvain, A. Bracher, R. J. W. Brewin, A. Bricaud, A. M. Ciotti, E. Devred, A. Fujiwara, T. Hirata, T. Hirawake, T. S. Kostadinov, S.Roy and J. Uitz
  • Journal Title: Frontiers in Marine Science Volume: 4 Pages: 1-19
  • DOI: 10.3389/fmars.2017.00041
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Potential Vulnerability of the Arctic Marine Ecosystem due to Environmental Changes (2019)
  • Author(s): Hirata, T., Masuda, Y., Garcia Molinos, J., Alabia, I., Hirawake T., Saitoh S-I
  • Organizer: PICES 2019 Annual Meeting
  • Int'l Joint Research
• [Presentation] A key spot and timing to monitor chlorophyll-a in the Kuroshio western boundary current (2019)
  • Author(s): Hirata Takafumi
  • Organizer: Japan Geoscience Union meeting 2019
  • Int'l Joint Research
• [Presentation] Significance of acclimation process in simulating chlorophyll distribution in the Arctic ocean (2019)
  • Author(s): Masuda, Y., Yamanaka,Y., Hirata,T., Nakano, H.
  • Organizer: Japan Geoscience Union meeting 2019
  • Int'l Joint Research
• [Presentation] ハイパースペクトル放射観測と海洋の植物プランクトン分類 (2019)
  • Author(s): 平田貴文, Brewin, R., Dall'Olmo, G., Soppa, M., Bracher,A.
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] Fine-scale temporal variation of chlorophyll-a in the Kuroshio waters observed from the Advanced Himawari Imager onboard the meteorological satellite Himawari-8 (2018)
  • Author(s): Takafumi Hirata
  • Organizer: Japan Geoscience Union Meeting 2018
  • Int'l Joint Research
• [Presentation] Effects of photo physiology and chlorophyll-a abundance on phytoplankton group-specific primary production in Japanese waters using remote sensing (2018)
  • Author(s): Takafumi Hirata, Koji Suzuki
  • Organizer: PICES 2018 Annual Meeting
  • Int'l Joint Research
• [Presentation] Phytoplankton size diversity from satellite observation (2017)
  • Author(s): Hirata, T., Y. Masuda, K. Suzuki, Y. Yamanaka
  • Organizer: JAMSTEC-ZMT Workshop "Plankton biodiversity, dynamic eco-physiology, and ecosystem function"
  • Int'l Joint Research
• [Presentation] Global size diversity of phytoplankton communities observed from space (2017)
  • Author(s): Hirata, T.
  • Organizer: Japan Geoscience Union 2017 meeting
  • Int'l Joint Research