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2014 Fiscal Year Research-status Report

天然藻場における生態系一次生産の評価研究

Research Project

Project/Area Number 25450260
Research InstitutionNagasaki University

Principal Investigator

ニシハラ グレゴリーナオキ  長崎大学, 水産・環境科学総合研究科(環シナ), 准教授 (40508321)

Co-Investigator(Kenkyū-buntansha) 河端 雄毅  長崎大学, 水産・環境科学総合研究科(環シナ), 助教 (50606712)
寺田 竜太  鹿児島大学, 水産学部, 准教授 (70336329)
Project Period (FY) 2013-04-01 – 2016-03-31
Keywords藻場 / 生態系一次生産量 / 季節変動
Outline of Annual Research Achievements

In the past year (second year of the study), we have been able reconfirm the results of the first year's field data. The results have been consistent, and we are slowly beginning to see a clear seasonal trend in the oxygen and photosynthesis dynamics of both sargassum and seagrass ecosystems. We have continued to monitor dissolved oxygen concentrations, photosynthetic photon flux density, water temperature, chlorophyll-a concentrations, surface wind velocities, subsurface water velocities, as well as barometric pressure. In parallel, we have conducted a few experiments to examine how water velocity and canopy density affects photosynthesis rates and daily productivity. A number of presentations have been done and a manuscript is expected by the end of 2015.

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

Field studies are notorious for unexpected events that cause problems in data collection, and therefore the interpretation of the surveys. Our work is no exception, and we unfortunately lost a important pieces of equipment used in the study. However, given our schedule we did not lose much time and were able to complete our work during the more important seasons.

Strategy for Future Research Activity

We plan to continue the survey, as outlined in the grant proposal. We should be able to complete all data collection this year, and plan to report our work internationally this year (2015).

  • Research Products

    (3 results)

All 2015

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Acknowledgement Compliant: 1 results) Presentation (2 results)

  • [Journal Article] Under slow flow conditions, daily rates of canopy photosynthesis of marine macrophytes were insensitive to model choice and flow-rate2015

    • Author(s)
      Gregory N. Nishihara, Chizuru Yamada, Ryutaro Kimura, and Ryuta Terada
    • Journal Title

      Phycological Research

      Volume: 0 Pages: 0

    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 藻場の溶存酸素濃度と光合成速度の日周リズム2015

    • Author(s)
      才津真子・寺田竜太・Gregory N. Nishihara
    • Organizer
      日本藻類学会第39回大会
    • Place of Presentation
      九州大学 (福岡市箱崎町)
    • Year and Date
      2015-03-20 – 2015-03-25
  • [Presentation] 海産植物は個体群密度が高いほど一次生産が低い?2015

    • Author(s)
      Gregory N. Nishihara・古賀愛梨沙
    • Organizer
      日本藻類学会第39回大会
    • Place of Presentation
      九州大学 (福岡市箱崎町)
    • Year and Date
      2015-03-20 – 2015-03-25

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Published: 2016-05-27  

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