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2020 Fiscal Year Annual Research Report

Evaluation of the groundwater impact on the diversity production in coastal environment: Toward the conservation of seagrass ecosystem services

Research Project

Project/Area Number 18H03411
Research InstitutionOkayama University

Principal Investigator

齋藤 光代  岡山大学, 環境生命科学研究科, 准教授 (20512718)

Co-Investigator(Kenkyū-buntansha) 岩田 徹  岡山大学, 環境生命科学研究科, 准教授 (10304338)
大久保 賢治  岡山大学, 環境生命科学研究科, 特命教授 (50135612)
小野寺 真一  広島大学, 先進理工系科学研究科(総), 教授 (50304366)
Project Period (FY) 2018-04-01 – 2021-03-31
Keywords地下水 / 沿岸環境 / 多様性 / 藻場 / 海底湧水
Outline of Annual Research Achievements

本研究では,高い生態系サービス機能を有する藻場の保全に向けて,地下水が沿岸環境の多様性形成に及ぼす影響を評価することを目的とし,最終年度である今年度は,瀬戸内海の島嶼部沿岸を対象に以下のとおり実施した.
(1) 海底湧水(Submarine Groundwater Discharge: SGD)にともなう淡水,熱,栄養塩輸送の空間分布および季節変化の定量的評価:1年目,2年目の対象地域(主にA: 広島県生口島およびB: 岡山県鹿久居島の沿岸部)における調査結果を取りまとめるとともに,SGDが藻場の空間分布や存在量,藻場を構成する生物種,および藻場の成育環境(水温,塩分,および栄養塩環境など)に及ぼす影響の評価を行った.その結果,特にアオサなどの緑藻類の分布や存在量に対し,SGD経由の窒素供給が大きく影響していることが明らかになった.
(2) 藻場の空間分布および季節的消長と陸水流入の関係性評価:1年目,2年目で得られた結果を取りまとめるとともに,対象地域における藻場の繁茂期および衰退期を対象としたUAVによる空撮などの補足的な調査を実施し,可視および近赤外画像解析の結果から,独自に定義した藻場識別指標を用い,従来明らかにされていなかった潮間帯スケールでの藻場の空間分布のマッピングを行い,踏査調査結果との整合性を確認した.
(3) 陸域の地下水流動状況が藻場に及ぼす影響のモデル化:1年目,2年目の対象地域における調査結果を取りまとめ,地下水依存型藻場の集水域を対象に,主に気象条件や地下水利用の変化にともなうSGDの変化を推定し,特に大規模な降雨の後にはSGDおよびそれにともなう沿岸域への栄養塩供給が増加する傾向を明らかにした.

Research Progress Status

令和2年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和2年度が最終年度であるため、記入しない。

  • Research Products

    (32 results)

All 2021 2020 Other

All Journal Article (11 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 11 results,  Open Access: 11 results) Presentation (17 results) (of which Int'l Joint Research: 15 results) Book (2 results) Remarks (2 results)

  • [Journal Article] IMPACT OF CITRUS AGRICULTURE ON THE QUALITY OF WATER RESOURCE IN A SMALL STEEP ISLAND, SETO INLAND SEA, JAPAN2021

    • Author(s)
      Sharon Bih Kimbi, Shingo Nozaki, Shin-ichi Onodera, Yusuke Tomozawa, Kungyang Wang, Anna Rusydi, Mitsuyo Saito
    • Journal Title

      International Journal of GEOMATE

      Volume: 20 Pages: 109~114

    • DOI

      10.21660/2021.82.6166

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] SPATIAL DISTRIBUTIONS IN GROUNDWATER DISCHARGE ON VARIOUS TIDAL FLATS IN A SMALL AND STEEP ISLAND, WESTERN JAPAN2021

    • Author(s)
      Shingo Nozaki, Shin-ichi Onodera, Yusuke Tomozawa, Mitsuyo Saito
    • Journal Title

      International Journal of GEOMATE

      Volume: 20 Pages: 66~71

    • DOI

      10.21660/2021.81.6131

    • Peer Reviewed / Open Access
  • [Journal Article] Vulnerability of groundwater to iron and manganese contamination in the coastal alluvial plain of a developing Indonesian city2021

    • Author(s)
      Rusydi Anna Fadliah、Onodera Shin-Ichi、Saito Mitsuyo、Ioka Seiichiro、Maria Rizka、Ridwansyah Iwan、Delinom Robert M.
    • Journal Title

      SN Applied Sciences

      Volume: 3 Pages: 1~12

    • DOI

      10.1007/s42452-021-04385-y

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Species and potential sources of phosphorus in groundwater in and around Mataram City, Lombok Island, Indonesia2021

    • Author(s)
      Ioka Seiichiro、Onodera Shin-ichi、Saito Mitsuyo、Rusydi Anna、Bakti Hendra、Wakasa Sachi A.
    • Journal Title

      SN Applied Sciences

      Volume: 3 Pages: 1~9

    • DOI

      10.1007/s42452-020-03975-6

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Potential Sources of Ammonium-Nitrogen in the Coastal Groundwater Determined from a Combined Analysis of Nitrogen Isotope, Biological and Geological Parameters, and Land Use2020

    • Author(s)
      Rusydi Anna Fadliah、Onodera Shin-Ichi、Saito Mitsuyo、Hyodo Fujio、Maeda Morihiro、Sugianti Khori、Wibawa Sunarya
    • Journal Title

      Water

      Volume: 13 Pages: 25~25

    • DOI

      10.3390/w13010025

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Estimation of long-term external nutrient loading from watersheds to Lake Biwa by a combined rainfall-runoff model and loading-discharge curve approach2020

    • Author(s)
      Le Tien Huu、Okubo Kenji、Ho Thi Phuong、Saito Mitsuyo
    • Journal Title

      Hydrological Research Letters

      Volume: 14 Pages: 143~149

    • DOI

      10.3178/hrl.14.143

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Material transport and cycle in watersheds: toward the interdisciplinary collaboration between limnology and the other research disciplines2020

    • Author(s)
      Saito Mitsuyo、Okuda Noboru、Onodera Shin-ichi
    • Journal Title

      Limnology

      Volume: 21 Pages: 427~428

    • DOI

      10.1007/s10201-020-00632-0

    • Peer Reviewed / Open Access
  • [Journal Article] Phosphorus cycling in watersheds: from limnology to environmental science2020

    • Author(s)
      Onodera Shin-ichi、Okuda Noboru、Ban Syuhei、Saito Mitsuyo、Paytan Adina、Iwata Tomoya
    • Journal Title

      Limnology

      Volume: 21 Pages: 327~328

    • DOI

      10.1007/s10201-020-00631-1

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Sediment phosphorus cycling in a nutrient-rich embayment in relation to sediment phosphorus pool and release2020

    • Author(s)
      Jin Guangzhe、Onodera Shin-ichi、Saito Mitsuyo、Shimizu Yuta
    • Journal Title

      Limnology

      Volume: 21 Pages: 415~425

    • DOI

      10.1007/s10201-020-00627-x

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effect of in-stream impoundment on water quality of a suburban stream2020

    • Author(s)
      Shimizu Yuta、Onodera Shin-ichi、Jin Guangzhe、Saito Mitsuyo
    • Journal Title

      Limnology

      Volume: 21 Pages: 393~402

    • DOI

      10.1007/s10201-020-00619-x

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Groundwater and ecosystems2020

    • Author(s)
      SAITO Mitsuyo、YASUMOTO Jun、SUGIYAMA Ayumi
    • Journal Title

      Journal of Groundwater Hydrology

      Volume: 62 Pages: 525~545

    • DOI

      10.5917/jagh.62.525

    • Peer Reviewed / Open Access
  • [Presentation] Long-term Nitrogen Flux and Balance in Yamato River Basin Influenced by Anthropogenic Activities2020

    • Author(s)
      Kunyan Wang、Shin-ichi Onodera、 Mitsuyo Saito
    • Organizer
      公益社団法人 日本地下水学会 2020年秋季講演会(リモート大会)
  • [Presentation] Brackishwater aquaculture impact to coastal groundwater quality2020

    • Author(s)
      Anna RUSYDI、Shin-Ichi ONODERA、 Mitsuyo SAITO、Seiichiro IOKA
    • Organizer
      公益社団法人 日本地下水学会 2020年秋季講演会(リモート大会)
  • [Presentation] Observation for the spatial variation of lacustrine groundwater discharge (LGD) in the northern basin of Lake Biwa by multi-layer measurement of radon (222Rn)2020

    • Author(s)
      Saito, M., Onodera, S., Tomozawa, Y., Wang, K., Ban, S., Okuda, N.
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Int'l Joint Research
  • [Presentation] Effects of sugarcane growth on hydrological elements and sediment yield2020

    • Author(s)
      曹 陽、小野寺 真一、齋藤 光代、大前 英、飯泉 佳子
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Int'l Joint Research
  • [Presentation] UAV及び近赤外カメラを用いた沿岸藻場の識別解析2020

    • Author(s)
      白石 朗光、齋藤 光代、濱 侃、小野寺 真一、岩田 徹
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Int'l Joint Research
  • [Presentation] Estimation of unsteady confined groundwater flow with river water intrusion in coastal alluvial plain during a large flood.2020

    • Author(s)
      友澤 裕介、小野寺 真一、齋藤 光代、竹内 徹、丸山 豊、北岡 豪一
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Int'l Joint Research
  • [Presentation] Spatial distributions in groundwater (SGD) and nutrient discharge on tidal flat with the area of around 100m square in a small and steep island, western Japan2020

    • Author(s)
      野崎 真吾、小野寺 真一、友澤 裕介、齋藤 光代
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Int'l Joint Research
  • [Presentation] Distribution of phosphate oxygen isotope in boring core samples for evaluation of phosphorus cycling in groundwater2020

    • Author(s)
      石田 卓也、友澤 裕介、Liu Xin、Qian Jun、齋藤 光代、小野寺 真一、奥田 昇、伴 修平
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Int'l Joint Research
  • [Presentation] Phosphorus in groundwater in the coastal area of Mataram, Lombok Island, Indonesia2020

    • Author(s)
      井岡 聖一郎、小野寺 真一、齋藤 光代、Rusydi Anna、若狭 幸
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Int'l Joint Research
  • [Presentation] Long-term Estimation on Nitrogen flux in the Yamato River Basin Influenced by the Construction of Sewerage Treatment Systems2020

    • Author(s)
      Kunyang Wang、Shin-ichi Onodera、Mitsuyo Saito、Yuta Shimizu
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Int'l Joint Research
  • [Presentation] Ammonium sources in rural coastal aquifer using integrated water quality parameters: chemical, biological, and environmental isotopes2020

    • Author(s)
      Anna Fadliah Rusydi、Mitsuyo Saito、Seiichiro Ioka、Morihiro Maeda、Fujio Hyodo、Rizka Maria、Shin-ichi Onodera
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Int'l Joint Research
  • [Presentation] Impact of Nishi-Nihon Big Storm in 2018 on nutrient discharge in a Seto Inland Sea Catchment: example in Takahashi River2020

    • Author(s)
      小野寺 真一、齋藤 光代、友澤 裕介、竹内 徹
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Int'l Joint Research
  • [Presentation] Impact of Urban Functional Area Subdivision on Simulation of Flash Flood in Hydrological Model2020

    • Author(s)
      Wang Kunyang、Onodera Shin-ichi、Qu Shuxue、Shimizu Yuta、Saito Mitsuyo
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Int'l Joint Research
  • [Presentation] Role of groundwater and river discharge on phosphorus supply into the lake2020

    • Author(s)
      Shin-ichi Onodera , Mitsuyo Saito , Kunyang Wang, Syuhei Ban , Noboru Okuda, Yusuke Tomozawa
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Int'l Joint Research
  • [Presentation] Did artificial re-oligotrophication induce a reduction of fish catch inLake Biwa?2020

    • Author(s)
      Syuhei Ban, Xin Liu , Masahiro Maruo , Naoshige Goto , Ken'ichi Osaka,Shin-ichi Onodera , Mitsuyo Saito, Takuya Ishida , Noboru Okuda
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Int'l Joint Research
  • [Presentation] Agriculture and brackish fishpond impact on the vulnerability of coastal groundwater in Southeast Asia2020

    • Author(s)
      Anna Fadliah Rusydi, Shin-ichi Onodera, Mitsuyo Saito, Seiichiro Ioka, Rizka Maria
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Int'l Joint Research
  • [Presentation] Spatio-temporal dynamics of submarine groundwater discharge (SGD) on an intertidal beach scale, temperate coastal area2020

    • Author(s)
      Saito, M., Onodera, S., Nozaki, S., Tomozawa, Y.
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Int'l Joint Research
  • [Book] みんなが知りたいシリーズ⑬ 地下水・湧水の疑問502020

    • Author(s)
      齋藤光代(公益財団法人 日本地下水学会編)
    • Total Pages
      272
    • Publisher
      成山堂書店
  • [Book] 流域ガバナンス2020

    • Author(s)
      伴 修平・小野寺真一・齋藤光代(脇田 健一、谷内 茂雄、奥田 昇編)
    • Total Pages
      470
    • Publisher
      京都大学学術出版会
    • ISBN
      978-4-8140-0303-7
  • [Remarks] 地下水の機能に着目した沿岸生態系の保全に関する研究

    • URL

      https://sdgs.okayama-u.ac.jp/efforts/detail.php?seq=151

  • [Remarks] 【自然共生システム】 海底湧水 地下水は海の生態系に豊かな多様性をもたらす

    • URL

      https://www.sekaiwokaeyo.com/theme/l2105/

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Published: 2021-12-27  

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