Fujimura Hiroyuki

写真a

Title

Professor

Researcher Number(JSPS Kakenhi)

20398308
2
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Current Affiliation Organization 【 display / non-display 】

  • Duty   University of the Ryukyus   Faculty of Science   Chemistry, Biology and Marine Science   Professor  

  • Concurrently   University of the Ryukyus   Graduate School of Engineering and Science   Chemistry, Biology and Marine Science   Professor  

  • Concurrently   University of the Ryukyus   Graduate School of Engineering and Science   Marine and Environmental Sciences   Professor  

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External Career 【 display / non-display 】

  • 2004.10
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    2006.03

    University of the Ryukyus  

  • 2004.10
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    2006.03

    University of the Ryukyus, Faculty of Science, Postdoctoral fellow  

  • 2006.07
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    2009.06

    University of the Ryukyus  

  • 2006.07
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    2009.06

    University of the Ryukyus, Faculty of Science, Department of Chemistry, Biology, and Marine Science, Analytical and Inorganic Chemistry, Assistant Research  

  • 2009.07
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    2019.06

    University of the Ryukyus  

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Affiliated academic organizations 【 display / non-display 】

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    American Geophysical Union 

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    The Japanese-French Oceanographic Society 

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    The Japan Society for Analytical Chemistry 

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    The Geochemical Society of Japan 

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    Japanese Coral Reef Society 

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Research Interests 【 display / non-display 】

  • Biogeochemistry

  • Carbonate Chemistry

  • calcification

  • carbonate

  • antioxidative enzyme

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Research Areas 【 display / non-display 】

  • Environmental Science/Agriculture Science / Environmental dynamic analysis

  • Nanotechnology/Materials / Analytical chemistry

  • Nanotechnology/Materials / Green sustainable chemistry and environmental chemistry

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Research Theme 【 display / non-display 】

  • Vertical profiles of carbonate system and ocean acidification in east chaina sea

  • Antioxidase activity of coral under heat stress condition

  • Chemical pollutants in costal area and the effects on coral

  • Carbon metabolisms of photosynthesis and calcification in coral reef

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Published Papers 【 display / non-display 】

  • Vegetation variety affected by local environments in a coral reef lagoon

    Kandai Tozaki, Gregory N. Nishihara, Azusa Kawate, Teruko Konishi, Yoichi Sato, Michihiro Ito, Hiroyuki Fujimura, Atsuko Tanaka

    Phycological Research ( Wiley )  72 ( 2 ) 112 - 122   2024.04 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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    Abstract From shore to sea, coral reefs can generally be divided into a lagoon zone, a reef crest, and a fore reef. Environmental variables, such as nutrient fluxes, light availability, and water temperature, vary among the zones and influence the biodiversity of submerged macrophytes. Additionally, the biodiversity of vegetation within the lagoon appears to be affected by multiple and extremely localized conditions. We investigated the impact of small‐scale variations on vegetation diversity, and implemented an ecological survey within a well‐defined area inside of a lagoon at Bise Point, Okinawa, Japan. A total of 20 macroalgal species (four green algae, six brown algae, and ten red algae) and four seagrass species were identified from the surveyed quadrats over a period of 19 months, from October 2019 to March 2021. Patterns in species occurrence were spatially and temporally heterogeneous. Notably, water motion and sediment flux were highly variable among the monitoring sites. Redundancy analysis allowed us to evaluate the significance of environmental factors on the vegetation of each monitoring area. Six environmental factors were considered in this study, but their impacts on local vegetation were not equivalent. Redundancy analysis suggested that water depth, flow velocity, and the ratio of the small fraction of deposition particles were the three factors with the strongest influence on local vegetation. This study provides some crucial insights into the determinants of vegetation in a coral reef lagoon. Our findings suggest that the factors we examined exert more influence on the vegetation than seasonal effects.

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  • Current status and potential of coral reef conservation through human interventions: focusing on coral bleaching

    HIGUCHI Tomihiko, MIYAJIMA Toshihiro, TAKAGI Toshiyuki, YUYAMA Ikuko, AGOSTINI Sylvain, NAKAMURA Takashi, FUJIMURA Hiroyuki

    Journal of the Japanese Coral Reef Society ( The Japanese Coral Reef Society )  26 ( 1 ) 19 - 37   2024 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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    <p>The frequent occurrence of coral bleaching due to rising seawater temperatures has become a major problem, and it is suggested that corals may die over a wide area in the future. In recent years, human intervention methods aimed at rescuing corals from large-scale mortality such as bleaching have been studied, and their feasibility in the field is being discussed. In this review, we introduce various approaches, such as acquiring stress tolerance through the physical environment and experienced environmental history that prevents and reduces bleaching stresses, increasing nutrition through heterotrophic food supply, and strengthening stress tolerance through the addition of metal elements like Mn. We also address bleaching as a holobiont, including bacteria and strategies for preventing bleaching utilizing genetic differences. In addition, the current status and future possibilities of human intervention in coral reef conservation efforts are discussed.</p>

  • Nutrient uptake characteristics of Cladosiphon okamuranus (Phaeophyceae) from the Ryukyu Islands of Japan

    Yoichi Sato, Eri Inomata, Hikari Nagoe, Michihiro Ito, Teruko Konishi, Hiroyuki Fujimura, Atsuko Tanaka & Gregory N. Nishihara

    Journal of Applied Phycology ( Journal of Applied Phycology )  35 ( 1 ) 265 - 275   2023.02 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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  • Correction: The Effect of Co-Culture of Two Coral Species on Their Bacterial Composition Under Captive Environments.

    Ide K, Nakano Y, Ito M, Nishikawa Y, Fujimura H, Takeyama H

    Marine biotechnology (New York, N.Y.) ( Marine Biotechnology )  24 ( 6 ) 1176 - 1176   2022.10 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

  • The Effect of Co-Culture of Two Coral Species on Their Bacterial Composition Under Captive Environments.

    Ide K, Nakano Y, Ito M, Nishikawa Y, Fujimura H, Takeyama H

    Marine biotechnology (New York, N.Y.) ( Marine Biotechnology )  24 ( 5 ) 871 - 881   2022.10 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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    Coral symbionts are important members of the coral holobiont, and coral bacterial flora are essential in host health maintenance and coral conservation. Coral symbionts are affected by various environmental factors, such as seawater temperature, pH, and salinity. Although physicochemical and chemical factors have been highlighted as possible causes of these effects, the effects of water flow and the co-culture of different species corals have not been elucidated. In this study, we designed an artificial rearing environment to examine the impact of environmental and biological factors on Acropora tenuis, one of the major coral species in Okinawa, and Montipora digitata, during their co-culture. We intervened with the water flow to reveal that the movement of the rearing environment alters the bacterial flora of A. tenuis. During the rearing under captive environment, the alpha diversity of the coral microbiota increased, suggesting the establishment of rare bacteria from the ocean. No differences in the bacterial composition between the control and water flow groups were observed under the rearing conditions. However, the structure of the bacterial flora was significantly different in the co-culture group. Comparison of bacterial community succession strongly suggested that the differences observed were due to the suppressed transmission of bacteria from the ocean in the co-culture group. These results enhance our understanding of interactions between corals and shed light on the importance of regional differences and bacterial composition of coral flora.

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Presentations 【 display / non-display 】

  • Behavior of Aluminum and DOC in waters of the Gesashi mangrove estuary, Okinawa, Japan

    Kombo Mohamed, Bakari Said, Okada Koichiro, Fujimura Hiroyuki, Shinjo Ryuichi, Tokuyama Akira

    日本地球化学会年会要旨集  2005  -  2005 

    CiNii Research

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SDGs 【 display / non-display 】

  • サンゴの白化現象解明による白化防止およびサンゴの救済

  • サンゴ礁におけるマイクロプラスとチックの動態と造礁サンゴへの影響

  • 個人レベルによる再生可能エネルギー導入の可能性と実践

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