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漫湖湿地におけるマングローブ林と干潟との共存

Research Project

Project/Area Number 16651009
Research Category

Grant-in-Aid for Exploratory Research

Allocation TypeSingle-year Grants
Research Field Environmental dynamic analysis
Research InstitutionUniversity of the Ryukyus

Principal Investigator

萩原 秋男  琉球大学, 理学部, 教授 (90126889)

Co-Investigator(Kenkyū-buntansha) 土屋 誠  琉球大学, 理学部, 教授 (40108460)
Project Period (FY) 2004 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2006: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2005: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2004: ¥1,900,000 (Direct Cost: ¥1,900,000)
Keywordsマングローブ林 / 光合成生産 / 剰余生産 / 最適葉面積指数 / 干潟 / 分解過程 / 脂肪酸組成 / 低生動物 / メヒルギ / 林冠 / 個体重 / 自己間引き / 光合成速度 / 窒素 / 矮性型 / 相対成長
Research Abstract

漫湖湿地のマングローブ林の主要構成樹種であるメヒルギの個葉の光合成速度と暗呼吸速度の葉群内の垂直変化を2年間に渡り毎月測定した。光合成速度と暗呼吸速度は様相の上部から下部にかけて減少し,低光度域での量子収量は上部から下部にかけて増加した。このことより,個葉が群落内の光環境に適応しながら,群落全体の光合成生産を営んでいることが判明した。年群落光合成生産量,葉群呼吸量,剰余生産量はそれぞれ130,44,59 Mg CO_2 ha^<-1> yr^<-1>と推定され,年群落光合成生産量のエルルギー効率は2.4%であった。
年群落光合成生産量は葉面積指数の増加に対して飽和し,一方,年葉群呼吸量は葉面積指数の増加に対して増加した。したがって,年剰余生産量を最大にする最適葉面積指数が存在し,この最適葉面積指数は実測値4.5ha ha^<-1>とほぼ一致した。メヒルギ林は光合成速度の低い下層の葉を落とすことで,年剰余生産量を最大に保っていると考えられた。
マングローブ域の干潟に生息している二枚貝は摂食様式(堆積物食,懸濁物食)の違いによって食物源が異なることを脂肪酸組成の解析によって明らかにするとともに,この研究方法を一般書において解説した。またイワガニ類の摂食活動がマングローブ域の堆積物環境に及ぼしている様子についての脂肪酸組成の動態を資料として解析した。マングローブ葉に蓄積されている脂肪酸についても沖縄からオーストラリアまでの数カ所で得た標本について調査し,各地域の特徴を解明した。

Report

(3 results)
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (19 results)

All 2007 2006 2005 2004

All Journal Article (18 results) Book (1 results)

  • [Journal Article] Carbon and nitrogen pools in a mangrove stand of Kandelia obovata (S.,L.) Young : vertical distribution in the soil-vegetation system.2007

    • Author(s)
      Khan, M.N.I.
    • Journal Title

      Wetlands Ecol. Manage. 15

      Pages: 141-153

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Inter-specific and geographical variations in fatty acid composition of mangrove leaves : implications for using fatty acids as a taxonomic tool and tracers of organic matter.2007

    • Author(s)
      Meziane, T.
    • Journal Title

      Marine Biology (in press)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Stand structure and woody species diversity in relation to stand stratification in a subtropical evergreen broadleaf forest, Okinawa Island.2006

    • Author(s)
      Feroz, S.M.
    • Journal Title

      J.Plant.Res. 119

      Pages: 293-301

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Architectural stratification and woody species diversity of a subtropical forest grown in a limestone habitat in Okinawa Island, Japan.2006

    • Author(s)
      Feroz, S.M.
    • Journal Title

      Enformatika 17

      Pages: 237-242

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Canopy photosynthesis canopy respiration and surplus production in a subtropical mangrove Kandelia candel forest, Okinawa Island, Japan.2006

    • Author(s)
      Suwa, R.
    • Journal Title

      Mar.Ecol.Prog.Ser. 320

      Pages: 131-139

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Food sources of coexisting suspension-feeding bivalves as indicated by fatty acid biomarkers, subjected to the bivalves abundance on a tidal flat.2006

    • Author(s)
      Bachock, Z.
    • Journal Title

      Journal of Sustainability Science and Management 1

      Pages: 92-111

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Stand structure and woody species diversity in relation to the stand stratification in a subtropical evergreen broadleaf forest, Okinawa Island2006

    • Author(s)
      Feroz, S.M.
    • Journal Title

      Journal of Plant Research 119(in press)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Canopy photosynthesis, canopy respiration and surplus production in a subtropical mangrove forest of Kandelia candel, Okinawa Island, Japan2006

    • Author(s)
      Suwa, R.
    • Journal Title

      Marine Ecology Progress Series (in press)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Effects of opportunistic feeding by the intertidal gastropods Batillaria zonalis and B.flectospiphonata on material flux of a tidal flat2006

    • Author(s)
      Kamimura, S.
    • Journal Title

      Marine Ecology Progress Series (in press)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Allometric relationships for estimating the aboveground phytomass and leaf area of mangrove Kandelia candel (L.) Druce trees in the Manko Wetland, Okinawa, Japan2005

    • Author(s)
      Khan, M.N.I.
    • Journal Title

      Trees Structure and Function 19

      Pages: 266-272

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Litter dynamics and particulate organic matter outwelling from a subtropical mangrove in Okinawa Island, South Japan2005

    • Author(s)
      Prosper, L.M.
    • Journal Title

      Estuarine, Coastal and Shelf Science 63

      Pages: 301-313

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Total lipid and fatty acid classes in decomposing mangrove leaves of Bruguiera gymnorrhiza and Kandelia candel: significance with respect to lipid input2005

    • Author(s)
      Prosper, L.M.
    • Journal Title

      Journal of Oceanography 61

      Pages: 613-622

    • Related Report
      2005 Annual Research Report
  • [Journal Article] サンゴ礁島嶼系における海岸景観の多様性-物質循環特性から考える-2005

    • Author(s)
      土屋 誠
    • Journal Title

      月刊海洋 号外, 40

      Pages: 105-111

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Allometric relationships for estimating the aboveground phyto- mass and leaf area of mangrove Kandelia candel (L.) Druce trees in the Manko Wetland, Okinawa Island, Japan2005

    • Author(s)
      Khan, Md.Nabuil Islam
    • Journal Title

      Trees (in press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Interception of photosynthetic photon flux density in a mangrove Kandelia candel (L.) Druce2004

    • Author(s)
      Khan, Md.Nabuil Islam
    • Journal Title

      J.For.Res. 9

      Pages: 205-210

    • Related Report
      2004 Annual Research Report
  • [Journal Article] subtropical evergreen broad-leaved forest in Okinawa Litterfall of a island, Japan2004

    • Author(s)
      Alhamd, Laode
    • Journal Title

      Tropics 13

      Pages: 255-268

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Decomposition of leaf litter of four tree species in a sub- tropical evergreen broad-leaved forest, Okinawa Island, Japan2004

    • Author(s)
      Alhamd, Laode
    • Journal Title

      For.Ecol.Manage. 202

      Pages: 1-11

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Relationship between maximum stem volume and density during a course of self-thinning in a Cryptomeria japonica plantation2004

    • Author(s)
      Ogawa, K.
    • Journal Title

      Kor.J.Ecl. 27

      Pages: 27-33

    • Related Report
      2004 Annual Research Report
  • [Book] 美ら島の自然史2006

    • Author(s)
      萩原秋男, 土屋 誠(分担執筆)
    • Publisher
      東海大学出版会
    • Related Report
      2006 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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