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生態系の長期変動は西部北太平洋亜寒帯域の生物ポンプ機能を変化させたか

Research Project

Project/Area Number 19030012
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionJapan Agency for Marine-Earth Science and Technology

Principal Investigator

千葉 早苗  Japan Agency for Marine-Earth Science and Technology, 地球環境フロンティア研究センター, 主任研究員 (40360755)

Co-Investigator(Kenkyū-buntansha) 本多 牧生  独立行政法人海洋研究開発機構, むつ研究所, サブリーダー (20359160)
笹井 義一  独立行政法人海洋研究開発機構, 地球環境フロンティア研究センター, 研究員 (40419130)
笹岡 晃征  独立行政法人海洋研究開発機構, 地球環境フロンティア研究センター, 研究員 (20371148)
Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥8,800,000 (Direct Cost: ¥8,800,000)
Fiscal Year 2008: ¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 2007: ¥4,000,000 (Direct Cost: ¥4,000,000)
Keywords生態系 / 生物ポンプ / 長期変動 / 時系列
Research Abstract

(長期生態系変動)西部北太平洋における過去数十年の海洋環境と生態系変動の関係についてレビューした結果を論文にまとめ出版した(Chiba et al.2008&2009)。特に十年規模周期の水温偏差に応じた親潮域における生物生産タイミングの経年的変化や(温暖期:早い,寒冷期:遅い),温暖性種の分布の南北移動について報告した。
(衛星データによる生物季節的変化の検知)1998-2007年の衛星海色データを用いて北太平洋の基礎生産の季節変動パターンを明らかにした。その結果、水温の上昇が基礎生産に正に働く海域(ベーリング海・親潮混合域)と負に働く海域(アラスカ湾・黒潮海域等)が見られた。また同じく海色衛星データを用いて、西部北太平洋亜寒帯域における植物プランクトンブルームのタイミングの経年変動を調べた結果,十年間でブルームのピークが約一ヶ月遅くなっていることが分った。海洋研究開発機構が同海域で実施している時系列観測の結果では,1998-2007年の間に水深5000mにおけるオパールのフラックスの割合が減少傾向に有り,表層のプランクトン群集組成の変化が示唆されている。本研究の結果から,経年的な環境変化に応じた表層生態系の生物季節的変化が,主要プランクトン種の変遷を招き,結果として海域の生物ポンプ機能に影響を与えていることが推測された。
(動物プランクトンによる炭素の鉛直輸送)2006-2008年に調査船「みらい」により採集した表層の動物プランクトンの群集/サイズ組成から摂餌率/排泄率を求め,基礎生産量および亜表層への炭素の鉛直輸送効率との関係について調べた。しかし夏季の高生物生産季においては,それらの間に明確な関係は見られなかった。今後は低生産季について同様の見積をし,その季節変動について明らかにしていく。

Report

(2 results)
  • 2008 Annual Research Report
  • 2007 Annual Research Report
  • Research Products

    (13 results)

All 2009 2008 2007

All Journal Article (5 results) (of which Peer Reviewed: 4 results) Presentation (8 results)

  • [Journal Article] Geographical shift of zooplankton communities and decadal dynamics of the Kuroshio-Oyashio Currents in the western North Pacific.2009

    • Author(s)
      Chiba S
    • Journal Title

      Global Change Biology doi:10.1111/j.1365-2486.x

      Pages: 1-13

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 気候のレジームシフトと海洋低次生態系の応答過程2009

    • Author(s)
      千葉 早苗
    • Journal Title

      月間海洋 (印刷中)

    • Related Report
      2008 Annual Research Report
  • [Journal Article] From climate regime shits to plankton phenology: synthesis of recent progress in retrospective studies of the western North Pacific2008

    • Author(s)
      Chiba S
    • Journal Title

      Progress in Oceanography 77

      Pages: 112-126

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Detection of regional scale sea-to-air oxygen emission related to spring bloom near Japan by using in-situ measurements of the atmospheric oxygen/nitrogen ratio2008

    • Author(s)
      Yamagishi, H
    • Journal Title

      Atmos. Chem. Phys. 8

      Pages: 3325-3335

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] From climate regime shits to plankton phenology: synthesis of recent progress in retrospective studies of the western North Pacific2008

    • Author(s)
      Chiba S
    • Journal Title

      Progress in Oceanography (印刷中)

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] Ballast-supported and residual paniculate organic carbon flux in the western Pacific subarctic gyre.2009

    • Author(s)
      Makio Honda
    • Organizer
      ASLO Aquatic Meeting
    • Place of Presentation
      Acropolis in Nice, France
    • Year and Date
      2009-01-29
    • Related Report
      2008 Annual Research Report
  • [Presentation] Anthropogenic gas distribution in the southern ocean: Formation and spreading of SAMW and AAIW2008

    • Author(s)
      Yoshikazu Sasai
    • Organizer
      The Ocean in a High-CO2 World II
    • Place of Presentation
      Musee Oceanographie in Monaco
    • Year and Date
      2008-10-06
    • Related Report
      2008 Annual Research Report
  • [Presentation] Recent trends in the North Pacific chlorophyll and their controlling factor in relation to climatic forcing using satellite remote sensing2008

    • Author(s)
      Kosei Sasaoka
    • Organizer
      International Symposium on the effects of Climate Change on the World's Oceans
    • Place of Presentation
      Congress Center in Gijon, Spain
    • Year and Date
      2008-05-22
    • Related Report
      2008 Annual Research Report
  • [Presentation] Anyway the wind blows... Scenario from climate to the lower trophic levels in the western North Pacific2008

    • Author(s)
      Sanae Chiba
    • Organizer
      Effects of Climate Change on the World's Oceans
    • Place of Presentation
      Congress Center in Gijon, Spain
    • Year and Date
      2008-05-21
    • Related Report
      2008 Annual Research Report
  • [Presentation] Pan-North Pacific synthesis of long-term variation ofNeocalanus spp. Based on the stable isotope analysis (SCOR WG125 contribution)2008

    • Author(s)
      Sanae Chiba
    • Organizer
      Effects of Climate Change on the World's Oceans
    • Place of Presentation
      Congress Center in Gijon, Spain
    • Year and Date
      2008-05-18
    • Related Report
      2008 Annual Research Report
  • [Presentation] Seasonal and inter-amual variability of chlorophyll a in the Nonth Pacific during 1997-2007 using ocean color remote sensing2008

    • Author(s)
      Sasaoka K
    • Organizer
      ASLO, Ocean Science Meeting
    • Place of Presentation
      Florida, USA
    • Year and Date
      2008-03-04
    • Related Report
      2007 Annual Research Report
  • [Presentation] Climatic forcing and phytoplankton phenology over the North Pacific 1997-20062007

    • Author(s)
      Chiba S
    • Organizer
      PICES 16th Annual Meeting
    • Place of Presentation
      Victoria, Canada
    • Year and Date
      2007-11-02
    • Related Report
      2007 Annual Research Report
  • [Presentation] Inter-annual variability of the biological pump in the northwestern North Pacific2007

    • Author(s)
      Honda M
    • Organizer
      PICES 16th Annual Meeting
    • Place of Presentation
      Victoria, Canada
    • Year and Date
      2007-10-30
    • Related Report
      2007 Annual Research Report

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Published: 2007-04-01   Modified: 2018-03-28  

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