研究者詳細

顔写真

オオヒガシ　タカミツ
大東　孝充
Takamitsu Ohigashi
所属
大学院生命科学研究科　生態発生適応科学専攻　生態ダイナミクス講座（統合生態分野）
職名
学位

  • 博士（食資源学）（北海道大学）

  • 修士（食資源学）（北海道大学）

経歴 1

  • 2024年4月 ～ 継続中
    東北大学　大学院生命科学研究科 生態発生適応科学専攻　特任研究員

学歴 2

  • 北海道大学　国際食資源学院

    2019年4月 ～ 2024年3月

  • 北海道大学　農学部　生物機能化学科

    2015年4月 ～ 2019年3月

所属学協会 2

  • 日本微生物生態学会

  • 日本生態学会

研究キーワード 3

  • 生態系生態学

  • 群集生態学

  • 土壌微生物

論文 5

  1. Global Role of Vanadium for Cryptogamic Nitrogen Fixation in Extratropical Forests 査読有り

    Romain Darnajoux, Shannon J. Haynes, Marie Renaudin, Nicolas Magain, Sessina Dani, Spencer Koonin, Jolanta Miadlikowska, Yoshitaka Uchida, Takamitsu Ohigashi, Diane Haughland, Francois Lutzoni, Jean-Philippe Bellenger, Xinning Zhang

    ENVIRONMENTAL SCIENCE & TECHNOLOGY　60　(12)　9213-9224　2026年3月31日

    DOI： 10.1021/acs.est.5c12982 　

    ISSN：0013-936X

    eISSN：1520-5851

  2. Agricultural land use induces broader homogenization of soil microbial functional composition than taxonomic composition in sub-Saharan Africa 査読有り

    Takamitsu Ohigashi, Yvonne M. Madegwa, George N. Karuku, Keston Njira, Yoshitaka Uchida

    Soil Biology and Biochemistry　2025年10月

    DOI： 10.1016/j.soilbio.2025.109895 　

  3. Differential Responses of Soil Ammonia-oxidizing Bacterial and Archaeal Communities to Land-use Changes in Zambia 査読有り

    Takamitsu Ohigashi, Suzumi Mori, Kanako Tago, Tsubasa Ohbayashi, Shintaro Hara, Yoshitaka Uchida

    Microbes and Environments　40　(1)　2025年

    出版者・発行元： Japanese Society of Microbial Ecology

    DOI： 10.1264/jsme2.me24049 　

    ISSN：1342-6311

    eISSN：1347-4405

  4. Effect of chicken manure amendment on lead burden in mice: exposure to lead-spiked soil 査読有り

    Nyein Chan Soe, Yared Beyene Yohannes, Takamitsu Ohigashi, Hokuto Nakata, Chikae Tatsumi, Yoshitaka Uchida, Walubita Mufalo, Mayumi Ito, Tsutomu Sato, Toshifumi Igarashi, Yoshinori Ikenaka, Mayumi Ishizuka, Shouta M. M. Nakayama

    Journal of Soils and Sediments　2024年3月13日

    DOI： 10.1007/s11368-024-03769-y 　

    ISSN：1439-0108 1614-7480

  5. Changes in Soil Prokaryotic Diversity in Response to Land-Use Changes in Sub-Saharan Africa 査読有り

    Takamitsu Ohigashi, Michael Schloter, Stefanie Schulz, Kabenuka Munthali, Yoshitaka Uchida

    Soil Systems　5　(4)　62-62　2021年10月4日

    出版者・発行元： {MDPI} {AG}

    DOI： 10.3390/soilsystems5040062 　

    ISSN：2571-8789

    詳細を見る 詳細を閉じる

    <jats:p>Sub-Saharan Africa is one of the most severely affected regions regarding soil degradation, a global issue with the loss of nutrients caused by inappropriate management, leading to low agricultural productivity. Here we asked the question of how soil prokaryotic communities are affected by shifts in land use management and subsequent losses in soil organic carbon. We sampled soils from three sites in Zambia which have neighboring natural and managed sites. After the measurement of soil properties, soil DNA was sequenced, targeting the 16S rRNA gene. As expected, total carbon in soil was decreased in the managed sites, with significant reductions of bacterial biomass. However, the diversity indices in the managed soils were higher than in natural soils. Particularly, the relative abundance of nitrifiers was increased in the managed soils, most likely as a result of fertilization. However also other bacteria, e.g., those which formed tight interactions with the cultivated crops including the genera Balneimonas, and Bacillus, were increased in the managed soils. In contrast bacteria belonging to the family Chloroflexi, which were high in abundance in the natural soil were outcompeted by other prokaryotes in the managed soils most likely as a result of changes in the amount of soil organic carbon. Overall, our results suggest that we need to discuss the trends of prokaryotic diversity separately from those for prokaryotic abundance. Even when bacterial abundances were decreased in the managed soils, nitrifiers’ relative abundance and diversity increased in our experiment, suggesting the possible alteration of the nitrogen cycle in managed soils in sub-Saharan Africa.</jats:p>

共同研究・競争的資金等の研究課題 1

  1. 環境DNA組成に埋め込まれた情報の復元による網羅的海洋環境モニタリング手法の開発

    大東 孝充

    2024年4月1日 ～ 2027年3月31日