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2021 Fiscal Year Annual Research Report

Transition process of seagrass-seaweed meadows driven by water and material transport from watersheds: Toward quantification and utilization of the ecosystem services

Research Project

Project/Area Number 21H03650
Research InstitutionOkayama University

Principal Investigator

齋藤 光代  岡山大学, 環境生命科学学域, 准教授 (20512718)

Co-Investigator(Kenkyū-buntansha) 濱田 麻友子  岡山大学, 自然科学学域, 准教授 (40378584)
兵藤 不二夫  岡山大学, 環境生命科学学域, 准教授 (70435535)
小野寺 真一  広島大学, 先進理工系科学研究科(総), 教授 (50304366)
作野 裕司  広島大学, 先進理工系科学研究科(工), 准教授 (20332801)
Project Period (FY) 2021-04-01 – 2024-03-31
Keywords藻場変遷過程 / 流域水・物質輸送 / 海底湧水 / 生物多様性 / 生態系サービス
Outline of Annual Research Achievements

本研究では,多様な生態系サービス機能を有する沿岸藻場の分布や藻場生態系の多様性変遷過程について,特に流域の水・物質輸送の影響に着目し明らかにすることを目的とし,初年度であるR3年度は以下のとおり実施した.
(1)河川水・地下水流出にともなう物質輸送量評価:1)流域水・物質輸送評価:①沿岸域に藻場が分布する瀬戸内海の島嶼(広島県生口島)を対象に,島内の流域において河川流量および地下水位のモニタリングを実施した.②対象流域に水・物質輸送モデル(Soil & Water Assessment Tool: SWAT)を適用・構築する準備を行った.2)SGD物質輸送評価:①対象流域沿岸の藻場分布域において,海底湧水(SGD)のトレーサーとなる塩分,水温,ラドン濃度,および栄養塩濃度の海水中の空間分布を確認するとともに,潮間帯にSGD観測用ピエゾメーターを設置し,同様に塩分,水温,ラドンおよび栄養塩濃度のモニタリングを実施した.
(2)藻場と構成種の空間分布・時間変化の把握:①ドローンを用いて対象流域沿岸の藻場の空撮を実施し,取得した画像データの解析から藻場とその構成種の空間分布を明らかにした.②現地での踏査調査(海草・海藻類の分布密度,種類,固体サイズなどの測定)を実施し,それらに基づき①の結果の検証を行った.
(3)藻場生態系の食物連鎖構造および栄養塩循環の解明:1)食物連鎖構造解析:①対象流域の藻場分布域において河川水・地下水および海水,堆積物試料,藻場を構成する海草・海藻類のサンプリングを実施し,窒素・炭素安定同位体比を測定した.2)栄養塩循環評価:①藻場分布域でのクロロフィルaと濁度の測定,および水試料の採取と栄養塩分析を行った.
(4)藻場生態系の生物多様性評価:①対象流域の藻場分布域において海水および堆積物試料を採取し,環境DNAの分析を行った.

Current Status of Research Progress
Current Status of Research Progress

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

Reason

初年度に計画していた現地における観測および試料の採取・分析はおおむね当初の予定通りに進めることが出来ている.

Strategy for Future Research Activity

次年度は,初年度に取得した観測データの整理・解析,現地試料の分析・解析を進めるとともに,季節変化の把握も念頭に置き,現地での観測を継続的に実施していく.

  • Research Products

    (35 results)

All 2022 2021

All Journal Article (10 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 10 results,  Open Access: 9 results) Presentation (25 results) (of which Int'l Joint Research: 23 results,  Invited: 3 results)

  • [Journal Article] Effects of forest growth in different vegetation communities on forest catchment water balance2022

    • Author(s)
      Wang Kunyang、Onodera Shin-ichi、Saito Mitsuyo、Shimizu Yuta、Iwata Toru
    • Journal Title

      Science of The Total Environment

      Volume: 809 Pages: 151159~151159

    • DOI

      10.1016/j.scitotenv.2021.151159

    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of nitrogen loading in the last 80 years in an urbanized Asian coastal catchment through the reconstruction of severe contamination period2022

    • Author(s)
      Wang Kunyang、Onodera Shin-ichi、Saito Mitsuyo
    • Journal Title

      Environmental Research Letters

      Volume: 17 Pages: 014010~014010

    • DOI

      10.1088/1748-9326/ac3ced

    • Peer Reviewed / Open Access
  • [Journal Article] The effect of unsteady recharge process on the groundwater environment in a coastal urbanized alluvial plain2021

    • Author(s)
      TOMOZAWA Yusuke、ONODERA Shin-ichi、SAITO Mitsuyo、TAKEUCHI Tohru、KITAOKA Koichi
    • Journal Title

      Journal of Japanese Association of Hydrological Sciences

      Volume: 51 Pages: 25~41

    • DOI

      10.4145/jahs.51.25

    • Peer Reviewed / Open Access
  • [Journal Article] Estimation of Phosphorus Transport Influenced by Climate Change in a Rice Paddy Catchment Using SWAT2021

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

      International Journal of Environmental Research

      Volume: 15 Pages: 759~772

    • DOI

      10.1007/s41742-021-00350-0

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

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

      International Journal of GEOMATE

      Volume: 20 Pages: 66~71

    • DOI

      10.21660/2021.81.6131

    • Peer Reviewed / Open Access
  • [Journal Article] A Conflict between the Legacy of Eutrophication and Cultural Oligotrophication in Hiroshima Bay2021

    • Author(s)
      Yamamoto Tamiji、Orimoto Kaori、Asaoka Satoshi、Yamamoto Hironori、Onodera Shin-ichi
    • Journal Title

      Oceans

      Volume: 2 Pages: 546~565

    • DOI

      10.3390/oceans2030031

    • Peer Reviewed / Open Access
  • [Journal Article] Assessment of Submarine Groundwater Discharge (SGD) as a Source of Nutrient at Jakarta Bay, Indonesia2021

    • Author(s)
      Lubis R F、Bakti H、Afdal、Prayitno H B、Bayhaqi A、Onodera S、Taniguchi M
    • Journal Title

      IOP Conference Series: Earth and Environmental Science

      Volume: 789 Pages: 012044~012044

    • DOI

      10.1088/1755-1315/789/1/012044

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Reproduction of the Marine Debris Distribution in the Seto Inland Sea Immediately after the July 2018 Heavy Rains in Western Japan Using Multidate Landsat-8 Data2021

    • Author(s)
      Song Shilin、Sakuno Yuji、Taniguchi Naokazu、Iwashita Hidetsugu
    • Journal Title

      Remote Sensing

      Volume: 13 Pages: 5048~5048

    • DOI

      10.3390/rs13245048

    • Peer Reviewed / Open Access
  • [Journal Article] Long-term variations in water balance by increase in percent imperviousness of urban regions2021

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

      Journal of Hydrology

      Volume: 602 Pages: 126767~126767

    • DOI

      10.1016/j.jhydrol.2021.126767

    • Peer Reviewed / Open Access
  • [Presentation] 水文水質モデルを用いた都市化流域における水・栄養塩流出の評価2021

    • Author(s)
      齋藤 光代、石原 秋太、王 崑陽、小野寺 真一
    • Organizer
      日本水文科学会研究発表会
  • [Presentation] 物候差変化を考慮した蒸発散量推定と集水域の水収支に対する混合林成長の影響2021

    • Author(s)
      王 崑陽、小野寺 真一、齋藤 光代、清水 裕太、岩田 徹
    • Organizer
      日本水文科学会研究発表会
  • [Presentation] Reconstruction of long-term change in external nitrogen loading and its effect on coastal sediment of Osaka Bay, western Japan2021

    • Author(s)
      齋藤 光代、小野寺 真一、王 崑陽
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] A comparative analysis in modeling surface runoff under climate and land use change in two catchments in Iran and Indonesia2021

    • Author(s)
      シュッシュタリ シャリフ、小野寺 真一、清水 裕太
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Estimation of groundwater and lake water interaction in the deeper zone of Lake Biwa, using 18O and D in pore water and groundwater2021

    • Author(s)
      小野寺 真一、齋藤 光代、友澤 裕介、石田 卓也、伴 修平、奥田 昇
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Analysis for the characteristics of water and nutrient discharge in a sub-basin of Osaka Bay catchment2021

    • Author(s)
      石原 秋太、王 崑陽、齋藤 光代、小野寺 真一
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Estimation of groundwater flow and a river water contribution to it in an alluvial plain of western Japan, using tracer methods2021

    • Author(s)
      友澤 裕介、竹内 徹、小野寺 真一、齋藤 光代、藤岡 正太郎
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Water environment issues in Chinese megacity delta-Sewage impacts on Peral river coastal area2021

    • Author(s)
      金 广哲、小野寺 真一、齋藤 光代、清水 裕太、陳 建耀
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Estimation of phosphorus budget and surface water -groundwater interaction in a coastal freshwater lake, Hachiro-gata, using phosphorus profile in lake bottom sediments nutrient enrichment area2021

    • Author(s)
      小野寺 真一、齋藤 光代、金 广哲、早川 敦
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Analysis of coastal seagrass bed distribution using UAV and near-infrared camera data2021

    • Author(s)
      岩田 徹、白石 朗光、齋藤 光代、小野寺 真一
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Process of spatio-temporal variation in seagrass-seaweed meadows in intertidal areas of Seto Inland Sea, western Japan2021

    • Author(s)
      齋藤 光代、小野寺 真一、曽我 夏史、出石 悠人、野崎 真吾、友澤 裕介
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Identification of enriched phosphate in groundwater: insights from distribution of phosphate oxygen isotope ratio in aquifer sediments2021

    • Author(s)
      石田 卓也、友澤 裕介、Xin Liu、齋藤 光代、小野寺 真一、奥田 昇、伴 修平
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Water discharge at forested watersheds throughout Japan by using SWAT2021

    • Author(s)
      今村 直広、Wang Kunyang、小野寺 真一、清水 裕太、小林 政広、清水 貴範、山下 尚之、篠宮 佳樹、玉井 幸治、澤野 真治、飯田 真 一、壁谷 直記、清水 晃、坪山 良夫
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Impact of brackish-water aquaculture on groundwater resources in a coastal alluvial aquifer2021

    • Author(s)
      Anna Fadliah Rusydi、Shin-ichi Onodera、Mitsuyo Saito、Seiichiro Ioka、Rizka Maria
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Hydrogeochemical evolution mechanisms of groundwater in the Semarang Coastal Zone, Java Island, Indonesia2021

    • Author(s)
      Rizka Maria、Anna Fadliah Rusydi、Shin-ichi Onodera、Mitsuyo Saito、Seiichiro Ioka、Robert Muhammad Delinom、Wahyu Purwoko、Dadi Sukmayadi、Hendarmawan
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Flood Impact on water quality in a Small Catchment Area: Preliminary Study2021

    • Author(s)
      Sharon Bih Kimbi、Shin-ichi Onodera、Shingo Nozaki、Yusuke Tomozawa
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Long-term Estimation on Phosphorus flux in a Coastal Catchment Influenced by the Anthropogenic Land Use Change2021

    • Author(s)
      Kunyang Wang、Shin-ichi Onodera、Mitsuyo Saito、Yuta Shimizu
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Integrating traditional and new water solutions to increase cities' resilience in tackling global climate change problems2021

    • Author(s)
      Ricardo Hirata、Shin-ichi Onodera、Mitsuyo Saito、Yuta Shimizu、Reginaldo Bertolo、Edson Wendland、Luciana Rodrigues Ferreira
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research / Invited
  • [Presentation] Estimation of Landuse Change Impact on Water Budget in Higashihiroshima Catchment using SWAT2021

    • Author(s)
      Sharon Bih Kimbi、Kunyang Wang、Shin-ichi Onodera、Ichirow Kaihotsu、Shingo Nozaki、Yusuke Tomozawa
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Effects of Forest Growth in Different Vegetation Communities to Forest Catchment Water Balance2021

    • Author(s)
      Kunyang Wang、Shin-ichi Onodera、Mitsuyo Saito、Yuta Shimizu、Toru Iwata
    • Organizer
      JpGU2021年大会
    • Int'l Joint Research
  • [Presentation] Groundwater issues and adaptations in agricultural lands in Japan: nitrate pollution issues in a small catchment scale not only groundwater but agriculture and environmental science2021

    • Author(s)
      Shin-ichi Onodera
    • Organizer
      IAH2021 (ROUND TABLE 8: Solving the challenges of groundwater agriculture)
    • Int'l Joint Research / Invited
  • [Presentation] Evaluation of the effect of groundwater recycling system on nitrate loads from an agricultural island, western Japan2021

    • Author(s)
      Shin-ichi Onodera, Jiahui Bai, Guangzhe Jin, Mitsuyo Saito, Yuta Shimizu, Kenji Matsumori
    • Organizer
      IAH2021
    • Int'l Joint Research
  • [Presentation] Groundwater hazard in Indonesia2021

    • Author(s)
      Rachmat Fajar Lubis, Hendra Bakti, Rizka maria, Robert Delinom, Shin-ichi Onodera, Mitsuyo Saito, Anna Rusydi
    • Organizer
      IAH2021
    • Int'l Joint Research
  • [Presentation] Nitrate dynamics and contamination status in groundwater of agricultural area in Sao Paulo State, Brazil2021

    • Author(s)
      Mitsuyo Saito, Norio Tase, Shin-ichi Onodera, Fernando Saraiva, Rafael Terada, Ricardo Hirata, Edson Cezar Wendland, Yusuke Tomozawa, Anna Rusydi, Masato Fukuoka
    • Organizer
      IAH2021
    • Int'l Joint Research
  • [Presentation] Potential impacts of groundwater-borne nutrients on coastal areas in changing human activities and climate2021

    • Author(s)
      Mitsuyo Saito
    • Organizer
      ECSA58&EMECS13
    • Int'l Joint Research / Invited

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Published: 2022-12-28  

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