TOKUYAMA Akira 渡久山章

Researcher Number	50045001
Other IDs
External Links
Affiliation (based on the past Project Information) *help	2007: University of the Ryukyus, Faculty of Science, Professor 2004 – 2007: 琉球大学, 理学部, 教授 2000 – 2002: 琉球大学, 理学部, 教授 1990 – 1992: 琉球大学, 理学部, 助教授 1986 – 1988: Dept. of Chemistry, Univ. of the Ryukyus; Associate Professor, 理学部, 助教授
Review Section/Research Field	Except Principal Investigator 広領域 / Environmental impact assessment/Environmental policy / 生態
Keywords	Principal Investigator 汚染 / 地下水 / 河川水 / 石灰岩 / 硝酸イオン / 沖縄 Except Principal Investigator サンゴ礁 / Red soil / 生物多様性 / 亜熱帯常緑広葉樹林 … More / イリオモテヤマネコ / 赤土 / マングローブ / 光合成 / Tilting / Uni-boom survey / Sediments / Sea-water composition / Sekisei-sho / Recent coral reef / Ryukyu Island Arc / タービダイト・エプロン / 傾動運動 / ユニブーム音波探査 / 底質 / 海水組成 / 石西礁 / 現世サンゴ礁 / 琉球弧 / Ecosystem evaluation / Subtropical evergreen forest / Ecosystem management / Biodiversity / Mangroves / Coral reefs / Ecosystem function / 亜熱帯広葉樹林 / サンゴ礁・島嶼 / 経済評価 / 環境機能 / 島嶼 / 生態系評価 / 生態系管理 / 生態系機能 / Benthos / Species diversity / Environment restoration / Mangrove / Coral reef / Island ecosystem / Ryukyu archipelago / 赤土汚染 / 物質循環 / 都市環境 / マングローブ林 / ベントス / 多様性 / 環境修復 / 島嶼生態系 / 琉球列島 / earth's environment / organic production / photosynthesis / calcification / coral reef / coral / carbon dioxide / 有機物生産 / 環境変動 / サンゴ / 沖縄 / 温暖化 / 石灰化 / 二酸化炭素 / 炭酸塩 / 石灰化速度 / 二酸化炭素濃度 Less

Evaluation of function in Island and coral reef ecosystems with reference to the effect of human activities
- Principal Investigator
  
  TSUCHIYA Makoto
- Project Period (FY)
  2004 – 2007
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Environmental impact assessment/Environmental policy
- Research Institution
  University of the Ryukyus
Development of restoration and conservation technique for the disturbed island ecosystem in the Ryukyu Archipelago
- Principal Investigator
  
  TSUCHIYA Makoto
- Project Period (FY)
  2000 – 2002
- Research Category
  
  Grant-in-Aid for University and Society Collaboration
- Research Field
  
  生態
- Research Institution
  University of the Ryukyus
Monitoring of coral calcification rate and CO2 concentration at coral reef.
- Principal Investigator
  
  OOMORI Tamotsu
- Project Period (FY)
  1991 – 1992
- Research Category
  
  Grant-in-Aid for General Scientific Research (B)
- Research Field
  
  広領域
- Research Institution
  University of the Ryukyus
サンゴ礁における二酸化炭素変動のモニタリング
- Principal Investigator
  
  OOMORI Tamotsu
- Project Period (FY)
  1990
- Research Category
  
  Grant-in-Aid for Scientific Research on Priority Areas
- Research Institution
  University of the Ryukyus
琉球石灰岩地域の河川水、地下水の汚染とその浄化に関する研究Principal Investigator
- Principal Investigator
  
  渡久山章
- Project Period (FY)
  1988
- Research Category
  
  Grant-in-Aid for Scientific Research on Priority Areas
- Research Institution
  University of the Ryukyus
琉球石灰岩地域の河川水, 地下水の汚染とその浄化に関する研究Principal Investigator
- Principal Investigator
  
  渡久山章
- Project Period (FY)
  1987
- Research Category
  
  Grant-in-Aid for Scientific Research on Priority Areas
- Research Institution
  University of the Ryukyus
Oceanographic environment and geologic genesis of the Sekisei Coral Reef region, southern Okinawa.
- Principal Investigator
  
  UJIIE Hiroshi
- Project Period (FY)
  1985 – 1986
- Research Category
  
  Grant-in-Aid for Co-operative Research (A)
- Research Field
  
  広領域
- Research Institution
  University of the Ryukyus

All 2008 2007 2006 2005 2004 Other

All Journal Article Presentation Book

[Book] 川と空気「やんばるの清流(諸喜田茂充、立原一憲編著)」2007
- Author(s)
  渡久山章
- Publisher
  リュウキュウアュを蘇生させる会
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Book] 赤土問題の基礎物理か学的視点(小柳元彦編著)2004
- Author(s)
  渡久山章
- Total Pages
  66
- Publisher
  沖縄タイムス社
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Book] 赤土問題の基礎物理化学的視点2004
- Author(s)
  小柳元彦, 渡久山章, 米蔵誠哲, 又吉直子, 漢名那洋子, 上門一哉他
- Total Pages
  66
- Publisher
  沖縄タイムス社
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Chemical characteristics of precipitation in Okinawa island, Japan.2008
- Author(s)
  H. Sakihama, M. Ishiki, A. Tokuyama
- Journal Title
  
  Atmospheric Environment 42
  
  Pages: 2320-2335
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] River and Air.2007
- Author(s)
  Akira Tokuyama
- Journal Title
  
  "Fresh water in the northern part of Okinawa Island"(ed. by S. Shokida and K. Tachihara,)(Ryukyu-ayu Restorative Association)
  
  Pages: 244-246
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Solute generation and CO2 consumption during silicate weathering under subtropical, humid climate, northern Okinawa Island, Japan.2007
- Author(s)
  Said Ali Hamad Vuai, Akira Tokuyama
- Journal Title
  
  Chemical Geology 236
  
  Pages: 199-216
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Chemical study of river waters in U.S. military training area of Okinawa Island (in Japanese with English abstract).2007
- Author(s)
  Maki Ishiki, A. Tokuyama
- Journal Title
  
  Japanese Journal of Limnology 68
  
  Pages: 29-40
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] 沖縄島米軍中部訓練場内における河川水の化学的研究2007
- Author(s)
  伊敷牧, 渡久山章
- Journal Title
  
  陸水学会誌 (印刷中)
- NAID
  130004511415
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Chemical impact of the acidic red soil on seawater.2006
- Author(s)
  Kombo M. Mkadam, Bakari S. S., R. Shinjo, A. Tokuyama
- Journal Title
  
  Galaxea, JCRS 8
  
  Pages: 13-23
- NAID
  130003670762
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Dissolved aluminum and silica release on the interactin of Okinawan subtropical red soil and seawater at different salinities : experimental and field observations.2006
- Author(s)
  Kombo, M.M., T.Yonaha, A.V.Said, A.Tokuyama
- Journal Title
  
  Geochemical J. 40
  
  Pages: 333-343
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Dissolved Aluminum and silica release on the interaction of Okinawan subtropical red soil and seawater at different salinities: Experimental and field observations.2006
- Author(s)
  Kombo M. Mkadam, T. Yonaha, Said A. Vuai, A. Tokuyama
- Journal Title
  
  Geochemical Journal 40
  
  Pages: 333-343
- NAID
  10019292595
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Chemical impact of the acidic red soil on seawater2006
- Author(s)
  Kombo M.Mkadam, Bakari S.S., R.Shinjo, A.Tokuyama
- Journal Title
  
  Galaxea, JCRS In press
- NAID
  130003670762
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Dissolved Aluminum and silica release on the interaction of Okinawan subtropical red Soil and seawater at different salinities : Experimental and field observations.2006
- Author(s)
  Kombo M.Mkadam, T.Yonaha, Said A.Vuai, A.Tokuyama
- Journal Title
  
  Geochemical Journal In press
- NAID
  10019292595
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Chemical impact of the acidic red soil on seawater.2006
- Author(s)
  Kombo, M.M., S.S.Bakari, R.Shinjo, A.Tokuyama.
- Journal Title
  
  Galaxea, JCRS 8
  
  Pages: 13-23
- NAID
  130003670762
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Dynamics of the nutrients in the forest.2006
- Author(s)
  Akira Tokuyama
- Journal Title
  
  Biodiversity of coral reef and island ecosystems of the Ryukyus" (ed. by the 21^<st> Century COE program committee, Univ. of the Ryukyus)(Tokai-daigakuShupankai)
  
  Pages: 248-257
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Influence of salinity on pH and aluminum upon the interaction of acidic red soil with seawater solution2005
- Author(s)
  Kombo M.Mkadam, Said A.Vuai, M.ishiki, A.Tokuyama
- Journal Title
  
  Journal of Oceanography 61
  
  Pages: 591-601
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Effect of typhoon on chemical composition of rainwater in Okinawa Island, Japan.2005
- Author(s)
  Hideaki Sakihama, Akira Tokuyama
- Journal Title
  
  Atmospheric Environment 39
  
  Pages: 2879-2888
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Influence of salinity on pH and aluminum upon the interaction of acidic red soil with seawater solution.2005
- Author(s)
  Kombo M. Mkadam, Said A. Vuai, M. ishiki, A. Tokuyama
- Journal Title
  
  Journal of Oceanography 61
  
  Pages: 591-601
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Forest fertility in Okinawa Island, subtropical region in Japan2004
- Author(s)
  Bakari S.S., S.A.Vuai, A.Tokuyama
- Journal Title
  
  Bull.Fac.Sci., Univ.Ryukyus 78
  
  Pages: 267-284
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Physical and chemical study on the red soil problem2004
- Author(s)
  Akira Tokuyama
- Journal Title
  
  (ed. by M. Koyanagi)(Okinawa Times.)
  
  Pages: 66-66
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Distribution of polychlorinated biphenyls, lead and cadmium in Manko tidal flat, Okinawa2004
- Author(s)
  Tashiro, Y., K.Takahira, H.Osada, H.Fujii, A.Tokuyama
- Journal Title
  
  Limnology 5
  
  Pages: 177-183
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Forest soil fertility in Okinawa Island, subtropical region in Japan.2004
- Author(s)
  Said Suleiman Bakari, Said Ali Vuai, A. Tokuyama
- Journal Title
  
  Bull. Fac. Sci., Univ. Ryukyus No78
  
  Pages: 267-284
- NAID
  120001374323
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Distribution of polychlorinated biphenyls(PCBs), lead, and cadmium in Manko tidal flat, Okinawa.2004
- Author(s)
  Y. Tashiro, K. Takahira, H. Osada, H. Fujii, A. Tokuyama
- Journal Title
  
  Limnology 5(No. 3)
  
  Pages: 177-183
- NAID
  10014221073
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Assessment of selfpurification in the Kizinga River-Dar es Salaam2004
- Author(s)
  Bakari, S.S., S.A.Vuai, F.L Mwanuzi, A.Tokuyama
- Journal Title
  
  Bull.Fac.Sci., Univ.Ryukyus 78
  
  Pages: 285-303
- Data Source
  KAKENHI-PROJECT-16201009
[Journal Article] Influence of salinity on pH and aluminum upon the interaction of acidic soil with seawater solution
- Author(s)
  Kombo, M., S.A.Said, A.Tokuyama
- Journal Title
  
  Journal of Oceanography (印刷中)
- Data Source
  KAKENHI-PROJECT-16201009
[Presentation] Chemical study on the precipitation and the river water in the Genka River watershed of the northern part of Okinawa Island.2007
- Author(s)
  M. Ishiki, A. Tokuyama
- Organizer
  Geochemical society of Japn
- Place of Presentation
  Okayama University
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Presentation] Chemical study on groundwater in the Ryukyu Limestone area.2006
- Author(s)
  K. Tokuyama, A. Tokuyama
- Organizer
  Geochemical society of Japn
- Place of Presentation
  Nihon University.
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Presentation] Chemical characteristics of the Urauchi River water in Iriomote Island national park..2006
- Author(s)
  M. Ishiki, H. Sakihama, A. Tokuyama
- Organizer
  Geochemical society of Japn
- Place of Presentation
  Nihon University.
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Presentation] 琉球石灰岩地域における地下水の化学的研究2006
- Author(s)
  渡久山久美
- Organizer
  日本地球化学会
- Place of Presentation
  日本大学
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Presentation] Chemical, mineralogical composition and availability of nutrients in three geological forest soils in Okinawa Island.2005
- Author(s)
  Bakari, S. S., Kombok, M. M., Shinjo, R., Tokashiki, Y., A. Tokuyama
- Organizer
  Geochemical society of Japn
- Place of Presentation
  Univ. of the Ryukyus.
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Presentation] Effect of development activities on the aquatic ecosystem in Iriomote Island.2005
- Author(s)
  Ishiki M., Sakihama H., A. Tokuyama
- Organizer
  COE Symposium
- Place of Presentation
  Univ. of the Ryukyus.
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Presentation] Behavior of Aluminum and DOC in waters of the Gesashi mangrove estuary, Okinawa (Japan). .2005
- Author(s)
  Kombok, M. M., Bakari, S. S., Okada, K., Fujimura, H., Shinjo, R., A. Tokuyama
- Organizer
  Geochemical society of Japn
- Place of Presentation
  Univ. of the Ryukyus.
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Presentation] Chemical study on the river water in the northern part of Okinawa Island. 日本地球化学会2004
- Author(s)
  H. Sakihama, A. Tokuyama
- Organizer
  Geochemical society of Japn
- Place of Presentation
  Shizuoka University.
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Presentation] Influence of underlain rock on the characteristics of organic matter and metal release in the forest soil in Okinawa Island, Japan.2004
- Author(s)
  Said Suleiman Bakari, Said Ali Vuai, A. Tokuyama
- Organizer
  Geochemical society of Japn
- Place of Presentation
  Shizuoka University.
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009
[Presentation] Effect of ionic strength on the dissolved silica in the interaction of acidic red soils from Okinawa and seawater solutions.2004
- Author(s)
  Kombo Mohammed Mukadam, T. Yonaha, Vuai Said Ali, A. Tokuyama
- Organizer
  Geochemical society of Japn
- Place of Presentation
  Shizuoka University.
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16201009

1. OOMORI Tamotsu (00045022)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
2. TANAHARA Akira (00217100)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
3. 大出茂 (20117568)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
4. TSUCHIYA Makoto (40108460)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
5. IZAWA Masako (10192478)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
6. HAGIHARA Akio (90126889)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
7. TAIRA Hatuo (70044998)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
8. ISA Eishin (20045040)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
9. SHOKITA Shigemitsu (50045027)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
10. SAKAI Kazuhiko (50153838)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
11. MAEKADO Akira (60190287)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
12. FUJITA Yoko (70315456)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
13. 浜崎盛康 (30208574)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
14. UJIIE Hiroshi (60000113)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
15. KOBA Motoharu (40141949)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
16. MATSUDA Shinya (30157317)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
17. KAWANA Toshio (60044955)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
18. YAMAMOTO Satoshi (50124855)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results

TOKUYAMA Akira 渡久山 章

Research Projects

Research Products

Co-Researchers

Evaluation of function in Island and coral reef ecosystems with reference to the effect of human activities

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Development of restoration and conservation technique for the disturbed island ecosystem in the Ryukyu Archipelago

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Monitoring of coral calcification rate and CO2 concentration at coral reef.

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

サンゴ礁における二酸化炭素変動のモニタリング

Principal Investigator

Project Period (FY)

Research Category

Research Institution

琉球石灰岩地域の河川水、地下水の汚染とその浄化に関する研究Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Institution

琉球石灰岩地域の河川水, 地下水の汚染とその浄化に関する研究Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Institution

Oceanographic environment and geologic genesis of the Sekisei Coral Reef region, southern Okinawa.

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

[Book] 川と空気「やんばるの清流(諸喜田茂充、立原一憲編著)」2007

Author(s)

Publisher

Description

Data Source

[Book] 赤土問題の基礎物理か学的視点(小柳元彦編著)2004

Author(s)

Total Pages

Publisher

Description

Data Source

[Book] 赤土問題の基礎物理化学的視点2004

Author(s)

Total Pages

Publisher

Data Source

[Journal Article] Chemical characteristics of precipitation in Okinawa island, Japan.2008

Author(s)

Journal Title

Description

Data Source

[Journal Article] River and Air.2007

Author(s)

Journal Title

Description

Data Source

[Journal Article] Solute generation and CO2 consumption during silicate weathering under subtropical, humid climate, northern Okinawa Island, Japan.2007

Author(s)

Journal Title

Description

Data Source

[Journal Article] Chemical study of river waters in U.S. military training area of Okinawa Island (in Japanese with English abstract).2007

Author(s)

Journal Title

Description

Data Source

[Journal Article] 沖縄島米軍中部訓練場内における河川水の化学的研究2007

TOKUYAMA Akira 渡久山章