Updated on 2025/10/17

写真a

 
HYODO Fujio
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Professor
Position
Professor
External link

Degree

  • 博士(理学) ( 京都大学 )

Research Areas

  • Life Science / Ecology and environment

Education

  • 京都大学大学院   理学研究科博士課程   生物科学専攻

    1999.4 - 2002.3

      More details

  • 京都大学大学院   理学研究科修士課程   生物科学専攻

    1997.4 - 1999.3

      More details

  • Kyoto University   農学部   林学科

    1993.4 - 1997.3

      More details

Research History

  • 岡山大学 学術研究院 環境生命自然科学学域   教授

    2023.4

      More details

  • 岡山大学 学術研究院 環境生命科学学域   准教授

    2022.4 - 2023.3

      More details

  • Okayama University   環境生命学研究科   Associate Professor

    2019.4 - 2022.3

      More details

  • Okayama University   異分野融合先端研究コア   Associate Professor

    2013.4 - 2019.3

      More details

  • Okayama University   異分野融合先端研究コア

    2009.1 - 2013.3

      More details

  • スウェーデン農科大学   日本学術振興会海外特別研究員

    2007.5 - 2009.1

      More details

  • 総合地球環境学研究所   プロジェクト研究員

    2006.4 - 2007.4

      More details

  • 総合地球環境学研究所   日本学術振興会特別研究員(PD)

    2003.4 - 2006.3

      More details

  • 総合地球環境学研究所   技術補佐員

    2002.4 - 2003.3

      More details

▼display all

 

Papers

▼display all

Books

  • 安定同位体を用いた餌資源・食物網調査法

    土居 秀幸, 兵藤 不二夫, 石川 尚人

    共立出版  2016  ( ISBN:9784320057548

     More details

    Language:Japanese

    CiNii Books

    researchmap

  • 環境史をとらえる技法

    湯本 貴和, 高原 光, 村上 哲明, 瀬尾 明弘, 津村 義彦, 百原 新, 清水 勇, 川瀬 大樹, 米田 穣, 陀安 一郎, 石丸 恵利子, 兵藤 不二夫, 日下 宗一郎, 覚張 隆史, 村上 由美子, 辻野 亮, 山口 裕文, 中井 精一, 中野 孝教

    文一総合出版  2011  ( ISBN:9784829912003

     More details

    Language:Japanese

    CiNii Books

    researchmap

MISC

  • シカ排除柵の内外におけるブナ成木の肥大成長量の比較

    阿部隼人, 付東川, 佐藤忠道, 徳本雄史, 櫻井優樹, 兵藤不二夫, 片山歩美

    日本森林学会大会学術講演集   135th   2024

  • Soil microbial community structure and the determining factors in Japanese forests

    織田峻綺, 菱拓雄, 岸本圭子, 黒川紘子, 兵藤不二夫

    日本生態学会大会講演要旨(Web)   70th   2023

  • Responses of soil biota to environmental changes

    兵藤不二夫

    日本生態学会大会講演要旨(Web)   70th   2023

  • 日本広域にわたる森林性糞虫群集の特性

    岸本圭子, 菱拓雄, 黒川紘子, 兵藤不二夫

    日本昆虫学会大会プログラム・講演要旨集   83rd (Web)   2023

  • 鳥類標本の学術的価値を維持した羽試料の採集方法の検討

    岩見恭子, 富田直樹, 兵藤不二夫, 武山智博

    日本鳥学会大会講演要旨集   2023   2023

  • Effects of intra-individual nitrogen dynamics on acorn production patterns in Quercus serrata and Q.glauca

    平山貴美子, 溝健太, 池本拓真, 神津州佑, 兵藤不二夫, 宮崎祐子

    日本生態学会大会講演要旨(Web)   70th   2023

  • 森林斜面に沿った土壌特性の違いにシカがおよぼす影響

    廣部宗, 清村康太, 松本哲也, 横部智浩, 兵藤不二夫, 舘野隆之輔

    日本森林学会大会学術講演集   134th   2023

  • Prey of whale sharks visiting the northern Satsunan area (western North Pacific Ocean)

    眞子裕友, 小針統, 久米元, 兵藤不二夫, 野口真希, 一宮睦雄, 小森田智大, 河邊玲, 中村乙水, 米山和良, 土田洋之

    日本プランクトン学会報   69 ( 1 )   2022

  • Relationship between beech decline and soil erosion in southern Kyushu

    阿部隼人, 小山田未森, 久米朋宣, 兵藤不二夫, 片山歩美

    日本生態学会大会講演要旨(Web)   69th   2022

  • Abiotic and biotic drivers on functional trait compositions of forest soil Collembola community in Japan archipelago

    菱拓雄, 黒川紘子, 岸本圭子, 兵藤不二夫

    日本生態学会大会講演要旨(Web)   69th   2022

  • Effect of seagrass-seaweed bed dynamics on carbon and nitrogen cycles on a tidal flat scale

    齋藤光代, 小野寺真一, 兵藤不二夫, 岩本和樹, 秋永拓弥

    日本地球惑星科学連合大会予稿集(Web)   2022   2022

  • Characteristics of soil microbial communities in Japanese forests

    織田峻綺, 菱拓雄, 岸本圭子, 黒川紘子, 兵藤不二夫

    日本生態学会大会講演要旨(Web)   69th   2022

  • Are ant-mimicking spiders tsun-dere?-Using machine learning methods to analyze behavioral changes in mimics in response to mimicry models.

    橋本佳明, 遠藤知二, 山崎健史, 兵藤不二夫, 市岡孝朗

    日本生態学会大会講演要旨(Web)   69th   2022

  • Effects of environmental changes on dependence of terrestrial arthropods on detritus food chain

    兵藤不二夫

    日本生態学会大会講演要旨(Web)   69th   2022

  • Estimate of the life forms of earthworms in agricultural land of Japan using natural isotope abundances

    金田哲, 兵藤不二夫, 池田紘士

    日本生態学会大会講演要旨(Web)   69th   2022

  • Floral sex determination related with resource dynamics within inflorescences in Commelina communis f. ciliata.

    佐藤弘大, 宮崎祐子, 勝原光希, 邑上夏菜, 廣部宗, 兵藤不二夫, 丑丸敦

    日本生態学会大会講演要旨(Web)   68th   2021

  • Relationship between the plasticity of floral sex determination and resources within inflorescences in Commelina communis f. ciliata

    佐藤弘大, 宮崎祐子, 勝原光希, 邑上夏菜, 廣部宗, 兵藤不二夫, 丑丸敦

    日本生態学会大会講演要旨(Web)   67th   2020

  • Interference competition between invasive alien ants and native ants: an approach using feeding habit analysis ―Research Group of Alien Ants―

    UEDA Shouhei, WATANABE Takuto, IKEDA Kenichi, HYODO Fujio

    Annual Report of Pro Natura Foundation Japan   28 ( 0 )   76 - 80   2020

     More details

    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (bulletin of university, research institution)   Publisher:Pro Natura Foundation Japan  

    <p>Argentine ant Linepithema humile is one of the most widespread invasive alien species, and was artificially introduced to 12 prefectures in Japan. The species can directly disrupt native ant-community and ecosystem throughout its introduced area. Here we analyzed a feeding habit of L. humile based on stable isotope analysis to show the mechanism of interference competition between invasive and native ant species. L. humile was introduced to Sakai city, Japan on 2015. In the invasive site in Sakai city, we continuously monitoring and controlling L. humile together with the local administration and the Ministry of Environment of Japan. From October 2017 to June 2018, we conducted stable isotope analysis using the invasive and native ant specimens and inferred feeding habits of them by comparing nitrogen stable isotope ratios (δ15N). The value of δ15N of L. humile was the secondary highest among sympatric eight ant species and similar to that of native predatory ants, such as Brachyponera and Strumigenys species. The overlap of δ15N value between L. humile and native predatory ants suggested that L. humile should occupy a high trophic position and feed on animal-based resources.</p>

    DOI: 10.32215/pronatura.28.0_76

    CiNii Article

    researchmap

  • The effects of litterfall origin and precipitation the fungal community and decomposition rate

    TATENO Ryunosuke, TATSUMI Chikae, HYODO Fujio, TANIGUCHI Takeshi, YAMANAKA Norikazu, DU Sheng

    The Japanese Forest Society Congress   131 ( 0 )   829 - 829   2020

     More details

    Language:Japanese   Publisher:THE JAPANESE FORESTRY SOCIETY  

    <p>[in Japanese]</p>

    DOI: 10.11519/jfsc.131.0_829

    CiNii Article

    researchmap

  • Relationship between decomposability of organic nitrogen and properties of nitrogen mineralization and retention in forest soils

    安達亮太, 兵藤不二夫, 黒岩恵, 大西雄二, 福島慶太郎, 木庭啓介, 廣部宗

    日本生態学会大会講演要旨(Web)   67th   2020

  • Changes in belowground nitrogen sources and physiological status of boreal forest plants during retrogression as revealed by stable isotope analysis

    兵藤不二夫, 竹林佑, 眞壁明子, 眞壁明子, DAVID Wardle A., DAVID Wardle A., 木庭啓介, 木庭啓介

    日本生態学会大会講演要旨(Web)   67th   2020

  • Effects of old dead wood on invertebrate communities in subalpine forests

    鈴木智之, 角田智詞, 兵藤不二夫, 杉浦大輔, 深澤遊, 中森泰三, 金子信博

    日本生態学会大会講演要旨(Web)   67th   2020

  • Prey sources of whale shark around the northern Satsunan area

    眞子裕友, 小針統, 兵藤不二夫, 相田真希, 土田洋之, 一宮睦雄, 小森田智大, 久米元, 河邊玲, 中村乙水, 米山和良

    日本ベントス学会・日本プランクトン学会合同大会講演要旨集   2020   2020

  • マアジの成育場としての北陸薩南海域の評価

    中屋慧, 小針統, 竹田力, 黒田大海, 一宮睦雄, 小森田智大, 平井惇也, 相田真希, 兵藤不二夫, 久米元

    日本水産学会大会講演要旨集   2020   2020

  • 局所的環境条件がブナ若齢実生の生残と成長に及ぼす影響

    山田和弘, 赤路康朗, 宮崎祐子, 安達亮太, 谷口武士, 兵藤不二夫, 坂本圭児, 廣部宗

    日本生態学会大会講演要旨(Web)   66th   ROMBUNNO.P1‐133 (WEB ONLY)   2019.2

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • 安定同位体が明らかにする熱帯のアリグモにおける植物性食物の重要性

    兵藤不二夫, 山崎健史, 岩浅拓也, 市岡孝朗, 遠藤知二, 橋本佳明

    日本生態学会大会講演要旨(Web)   66th   ROMBUNNO.M02‐04 (WEB ONLY)   2019.2

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • 落葉広葉樹二次林における優占種コナラの成長に影響を与える環境要因

    伊藤蒼, 兵藤不二夫, 松本哲也, 赤路康朗, 宮崎祐子, 廣部宗, 西村尚之, 坂本圭児

    日本生態学会大会講演要旨(Web)   66th   ROMBUNNO.P1‐118 (WEB ONLY)   2019.2

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • 落葉広葉樹林の下層植生管理による土壌生物相への影響

    藤巻玲路, 兵藤不二夫, 牛川大輝, 山下多聞

    日本生態学会大会講演要旨(Web)   66th   ROMBUNNO.P2‐207 (WEB ONLY)   2019.2

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • 雄性両全性同株ケツユクサの花の性は資源依存的に決まるのか?

    佐藤弘大, 宮崎祐子, 勝原光希, 邑上夏菜, 廣部宗, 兵藤不二夫, 丑丸敦史

    日本生態学会大会講演要旨(Web)   66th   ROMBUNNO.P1‐152 (WEB ONLY)   2019.2

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • 粒径分画を用いた森林表層土壌に含まれる有機態窒素の分解性評価

    廣部宗, 冨田悟司, 浦川梨恵子, 兵藤不二夫, 柴田英昭

    日本生態学会大会講演要旨(Web)   66th   ROMBUNNO.P2‐402 (WEB ONLY)   2019.2

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • Intra- and inter-specific variations in functional traits of woody species across a temperature gradient

    Onoda Yusuke, Aiba Masahiro, Kurokawa Hiroko, Hyodo Fujio, Ichie Tomoaki, Nakashizuka Tohru

    The Japanese Forest Society Congress   130 ( 0 )   609   2019

     More details

    Language:Japanese   Publisher:日本森林学会  

    DOI: 10.11519/jfsc.130.0_609

    CiNii Article

    researchmap

  • 鹿児島湾湾口部におけるマアジの初期生態

    中屋慧, 小針統, 竹田力, 黒田大海, 一宮睦雄, 小森田智大, 平井惇也, 相田真希, 兵藤不二夫, 久米元

    日本水産学会九州支部総会・大会・例会講演要旨集   2019   2019

  • 鹿児島湾の湾口部におけるマアジの初期生活史

    中屋慧, 小針統, 竹田力, 黒田大海, 一宮睦雄, 小森田智大, 平井惇也, 相田真希, 兵藤不二夫, 久米元

    日本魚類学会年会講演要旨   52nd   2019

  • 魚類の産卵場及び生育場としての北部薩南海域の重要性について

    久米元, 小針統, 一宮睦雄, 小森田智大, 平井惇也, 相田真希, 兵藤不二夫, 竹田力, 重村太一, 黒田大海, 吉永尚平, 中屋慧, 鳴海敦

    日本海洋学会大会講演要旨集   2018   118   2018.9

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • 鹿児島湾湾口部における魚類仔魚の摂餌生態

    黒田大海, 久米元, 小針統, 竹田力, 一宮睦雄, 小森田智大, 平井惇也, 相田真希, 兵藤不二夫

    日本海洋学会大会講演要旨集   2018   125   2018.9

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • 鹿児島県南部の黒潮周辺海域における魚類仔魚の群集構造と摂餌生態

    吉永尚平, 久米元, 山之上香織, 田野中里佳, 小針統, 平井惇也, 相田真希, 兵藤不二夫

    日本海洋学会大会講演要旨集   2018   126   2018.9

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • ベトナム中部沿岸農業地域における地下水窒素汚染機構の解明

    木場 遥香, 前田 守弘, 兵藤 不二夫, 井上 大介, 近森 秀高

    日土肥講要   63 ( 0 )   14 - 14   2018.5

     More details

    Language:Japanese   Publisher:一般社団法人 日本土壌肥料学会  

    CiNii Article

    researchmap

  • The effect on growth of young beech seedlings by light environment and soil environment

    Yamada Kazuhiro, Akaji Yasuaki, Hirobe Muneto, Hyoudou Fujio, Miyazaki Yuhko, Sakamoto Keiji

    The Japanese Forest Society Congress   129 ( 0 )   2018.5

     More details

    Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)   Publisher:日本森林学会  

    CiNii Article

    J-GLOBAL

    researchmap

  • ブナ若齢実生の成長に光環境と土壌環境が与える影響

    山田和弘, 赤路康朗, 赤路康朗, 廣部宗, 兵藤不二夫, 宮崎祐子, 坂本圭児

    日本森林学会大会学術講演集   129th   151   2018.3

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • 同位体分析が解き明かすシロアリの多様な食性

    兵藤不二夫

    しろあり   ( 169 )   1‐11 - 11   2018.1

     More details

    Language:Japanese   Publisher:日本しろあり対策協会  

    CiNii Article

    J-GLOBAL

    researchmap

  • 枯死木を利用する生物群集が森林生態系食物網に与える影響:50年前の風倒地を例に

    鈴木智之, 角田智詞, 杉浦大輔, 兵藤不二夫, 深澤遊, 中森泰三, 金子信博

    日本生態学会大会講演要旨(Web)   65th   ROMBUNNO.T10‐5 (WEB ONLY)   2018

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • 冷温帯林の二次遷移に伴う地上部‐地下部の生態特性とアリ群集の食性の変化

    兵藤不二夫, 田中洋, 原口岳, 舘野隆之輔, 廣部宗, 陀安一郎

    日本生態学会大会講演要旨(Web)   65th   ROMBUNNO.D02‐07 (WEB ONLY)   2018

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • 侵略的外来種アルゼンチンアリが在来アリ群集におよぼす影響

    渡邊琢斗, 兵藤不二夫, 平井規央, 上田昇平

    日本環境動物昆虫学会年次大会要旨集   30th   2018

  • 粒子食性カラヌス目カイアシ類の摂餌様式と食性の分類群間比較

    米田壮汰, 田村啓明, 阿部義之, 野口真希, 兵藤不二夫, 大塚攻, 山口篤

    日本ベントス学会・日本プランクトン学会合同大会講演要旨集   2018   2018

  • 鹿児島湾湾口部における魚類仔魚の摂餌生態

    黒田大海, 久米元, 小針統, 竹田力, 一宮睦雄, 小森田智大, 平井惇也, 相田真希, 兵藤不二夫

    日本水産学会九州支部総会・大会・例会講演要旨集   2018   2018

  • 安定同位体比等を用いたベトナム中部沿岸農業地域における地下水窒素汚染機構の解明

    前田守弘, 木場遥香, 兵藤不二夫, 近森秀高, 井上大介

    日本水環境学会シンポジウム講演集   20th   219‐220   2017.9

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • 堆積物中の花粉組成から周辺植生を復元できるか?:REVEALSモデルを用いた北海道4湖沼における定量的な植生復元の試み

    佐々木尚子, 高原光, 杉田真哉, 林竜馬, 兵藤不二夫, 加三千宣, 占部城太郎

    日本花粉学会大会講演要旨集   58th   79   2017.9

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • ベトナム中部沿岸農業地域における地下水窒素汚染機構の解明

    木場遥香, 前田守弘, 兵藤不二夫, 井上大介, 近森秀高

    日本土壌肥料学会講演要旨集   63   14   2017.9

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • 木登りカタツムリはなぜ木に登る?~樹上生活性が進化した適応的意義~

    佐伯いく代, 丹羽慈, 長田典之, 兵藤不二夫, 太田民久, 大石善隆, 日浦勉

    日本貝類学会大会研究発表要旨集   2017   23   2017.4

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • Evaluation of insect feeding habits using isotopes

    兵藤 不二夫

    昆虫と自然   52 ( 2 )   2 - 6,図巻頭1p   2017.2

     More details

    Language:Japanese   Publisher:ニューサイエンス社  

    CiNii Article

    CiNii Books

    researchmap

  • Soil nitrogen mineralization and organic nitrogen along a slope in a Chamaecyparis obtusa plantation

    Hirobe Muneto, Hyodo Fujio, Isobe Kazuo, Shima Kazuto

    The Japanese Forest Society Congress   128 ( 0 )   2017

     More details

    Language:Japanese   Publisher:日本森林学会  

    &lt;p&gt;[in Japanese]&lt;/p&gt;

    CiNii Article

    J-GLOBAL

    researchmap

  • Characteristics of organic matter diagenesis in buried soil layers under forest ecosystems

    Adachi Ryota, Hobara Satoru, Kaneko Mikoto, Hiradate Syuntarou, Wagai Routa, Hyodo Fujio, Nakatani Nobutake

    The Japanese Forest Society Congress   128 ( 0 )   2017

     More details

    Language:Japanese   Publisher:日本森林学会  

    &lt;p&gt;[in Japanese]&lt;/p&gt;

    CiNii Article

    researchmap

  • 周辺の原生林が熱帯雨林の二次林のアリの食性に及ぼす影響:同位体による解明

    兵藤不二夫, 岸本圭子, 松岡真如, 田中洋, 橋本佳明, 石井励一郎, 市岡孝朗

    日本生態学会大会講演要旨(Web)   64th   2017

  • Effects of tropical forest remnants on the assemblage of parasitoid wasps in the surrounding areas in Borneo

    Meleng, Paulus, Itioka, Takao, Yamashita, Satoshi, Mohammad, Fatimah, Ali, Mohammas Nafri, Hossman, Mohamad Yazid, Sakai, Shoko, Takano, K. Takenaka, Hyodo, Fujio, Takematsu, Yoko, Ito, Masato, Maeto, Kaoru

    The symposium "Frontier in tropical forest research: progress in joint projects between the Forest Department Sarawak and the Japan Research Consortium for Tropical Forests in Sarawak"   2016   169 - 174   2016.6

     More details

    Language:English   Publishing type:Research paper, summary (international conference)   Publisher:Forest Department Sarawak (FDS); Japan Research Consortium for Tropical Forests in Sarawak (JRCTS)  

    CiNii Article

    CiNii Books

    researchmap

    Other Link: http://orcid.org/0000-0001-8803-0252

  • 安定同位体を用いた餌資源・食物網調査法

    土居 秀幸, 兵藤 不二夫, 石川 尚人

    1 - 164   2016

     More details

    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

    researchmap

  • 木登りカタツムリが木に登らないとどうなるのか?

    佐伯いく代, 丹羽慈, 長田典之, 兵藤不二夫, 太田民久, 大石善隆, 日浦勉

    日本生態学会大会講演要旨(Web)   63th   G1‐12 (WEB ONLY)   2016

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • ヒノキ林における,土壌窒素動態と真菌・細菌バイオマスの季節的変動の関係

    横部智浩, 兵藤不二夫, 徳地直子

    日本生態学会大会講演要旨(Web)   63rd   2016

  • 同位体が解き明かす土壌動物の食性と生態系機能

    兵藤不二夫

    日本生態学会大会講演要旨(Web)   63rd   2016

  • 土地利用変化がトノサマガエルの食性に与える影響

    青木香澄, 丑丸敦史, 兵藤不二夫

    日本生態学会大会講演要旨(Web)   63rd   2016

  • 木の上のカタツムリを観察してみよう

    佐伯いく代, 丹羽慈, 長田典之, 兵藤不二夫, 太田民久, 日高周, 日浦勉

    日本貝類学会大会研究発表要旨集   2015   23   2015.5

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • 1-1-17 PTFEトラップおよびデバルダ合金を用いた化学形態別窒素安定同位体分析の適用条件(1-1 物質循環・動態,2015年度京都大会)

    木場 遥香, 前田 守弘, 兵藤 不二夫, Hoang Ngoc Tuong Van

    日本土壌肥料学会講演要旨集   61 ( 0 )   6 - 6   2015

     More details

    Language:Japanese   Publisher:一般社団法人日本土壌肥料学会  

    CiNii Article

    CiNii Books

    researchmap

  • サッポロマイマイはなぜ木に登るのか?

    佐伯いく代, 丹羽慈, 長田典之, 兵藤不二夫, 日高周, 太田民久, 日浦勉

    日本生態学会大会講演要旨(Web)   62nd   PB2-103 (WEB ONLY)   2015

     More details

    Language:Japanese  

    J-GLOBAL

    researchmap

  • Examination of the geochemical technique to evaluate the recent environmental change of Japanese lakes.

    Ohmoto Kouhei, Chiba Hitoshi, Hyodo Fujio

    Abstracts of Annual Meeting of the Geochemical Society of Japan   59 ( 0 )   2012

     More details

    Language:Japanese   Publisher:一般社団法人日本地球化学会  

    本研究では,湖沼やその集水域においての過去100年における環境変遷を地球化学的に評価する手法の開発を目的とし,北海道の羅臼湖・阿寒湖・ニセコ大沼・渡島大沼、富山県のみくりが池,長野県の木崎湖,琵琶湖の計7湖沼の湖底堆積物コアサンプルの各種元素濃度を深度(年代)ごとに誘導結合型プラズマ質量分析計(ICP-MS)で測定した。また,湖沼堆積物の起源を推定することを目的として,堆積物中のSr同位体比を表面電離型質量分析計(TIMS)で測定した。その結果,琵琶湖・阿寒湖ではP( 最上部で共に > 1000ppm ),As( 最上部で共に > 100ppm )の濃度増加が確認され,湖底環境の嫌気化並びに湖水の富栄養化の影響が示唆された。また,Sr同位体比とSr濃度データから,ニセコ大沼ではSr同位体比の異なる二成分の混合が示唆されたが,他の湖沼においてはSr同位体比の異なる複数の成分は明確に区別されなかった。

    DOI: 10.14862/geochemproc.59.0.219.0

    CiNii Article

    researchmap

  • 1-15 牛舎由来のアンモニア揮散が隣接圃場におよぼす影響 : 笠岡湾干拓地における一事例(1.物質循環・動態,2012年度鳥取大会)

    浅野 裕一, 前田 守弘, 兵藤 不二夫, 中島 泰弘, 藤原 拓, 永禮 英明, 赤尾 聡史

    日本土壌肥料学会講演要旨集   58 ( 0 )   5 - 5   2012

     More details

    Language:Japanese   Publisher:一般社団法人日本土壌肥料学会  

    CiNii Article

    CiNii Books

    researchmap

  • 1-45 農地排水を対象とした形態別窒素安定同位体比分析手法の検討(1.物質循環・動態)

    浅野 裕一, 前田 守弘, 兵藤 不二夫, 中島 泰弘, 藤原 拓, 永禮 英明, 赤尾 聡史

    日本土壌肥料学会講演要旨集   57 ( 0 )   15 - 15   2011

     More details

    Language:Japanese   Publisher:一般社団法人日本土壌肥料学会  

    CiNii Article

    CiNii Books

    researchmap

  • Carbon and nitrogen stable isotope analysis of dietary differences among the Jomon population in Japan. Reviewed

    Kusaka Soichiro, Hyodo Fujio, Yumoto Takakazu, Nakatsukasa Masato

    AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY   149   2010

  • 1-30 笠岡湾干拓地内における水質汚染の現状と安定同位体比による汚染源の推定(1.物質循環・動態,2010年度北海道大会)

    浅野 裕一, 前田 守弘, 兵藤 不二夫, 中島 泰弘, 藤原 拓, 永禮 英明, 赤尾 聡史

    日本土壌肥料学会講演要旨集   56 ( 0 )   10 - 10   2010

     More details

    Language:Japanese   Publisher:一般社団法人日本土壌肥料学会  

    CiNii Article

    CiNii Books

    researchmap

  • 食物連鎖に沿ったCN安定同位体分別係数はどのように決まっているか:アミノ酸代謝モデルからの考察

    石井励一郎, 相田真希, 小川奈々子, 高津文人, 山田佳裕, 兵藤不二夫, 和田英太郎

    日本生態学会大会講演要旨集   57th   2010

  • Nitrogen-stable isotopic signatures of basal food items, primary consumers and omnivores in rivers with different levels of human impact (Ecological Research DOI: 10.1007/s11284-008-0489-x)

    Ayato Kohzu, Ichiro Tayasu, Chikage Yoshimizu, Atsushi Maruyama, Yukihiro Kohmatsu, Fujio Hyodo, Yukio Onoda, Akitake Igeta, Kiyoshi Matsui, Takanori Nakano, Eitaro Wada, Toshi Nagata, Yasuhiro Takemon

    Ecological Research   24 ( 1 )   137   2009.1

     More details

  • 大気圏核実験由来放射性炭素14を用いた生態学 (特集 生物の年代測定・年齢査定) -- (放射性炭素同位体を用いた年代測定)

    陀安 一郎, 兵藤 不二夫, 石川 尚人

    遺伝   62 ( 6 )   90 - 94   2008.11

     More details

    Language:Japanese   Publisher:エヌ・ティー・エス  

    CiNii Article

    CiNii Books

    researchmap

  • 土壌食物網における食物の腐植化に伴う15Nの濃縮:15Nと食物年齢の関係

    兵藤不二夫, 陀安一郎, Souleymane KONATE, Jerome Ebagnerie TONDOH, Patrick LAVELLE, 和田英太郎

    日本生態学会第55回大会   2008

     More details

    Language:Japanese  

    researchmap

  • Bioelement load to Lake Biwa by the runoff of the muddy water in the period of ploughing and irrigating the fields.

    Yamada Yoshihiro, Igeta Akitake, Nakashima sachi, Mito Yugo, Ogasahara Takako, Wada Sayaka, Ohno Tomohiko, Ueda Atsushi, hyodo Hujio, Yachi Shigeo, Tayasu Ichiro, Fukuhara Syoichi, Tanaka Takuya, Wada Eitaro

    Proceedings of General Assembly of The Japanese Society of Limnology   69 ( 0 )   187 - 187   2005

     More details

    Publisher:日本陸水学会  

    水田からの排水が琵琶湖に与える影響を評価することを目的に、圃場単位において代掻き期の粗放的水管理を再現して、水田から排出される懸濁態粒子(SS)、全窒素、全リンの量を明らかにした。水深の深い水田での強制落水時に各々最大値が得られた。この結果を、東近江地域(近江八幡_から_彦根)の水田141km&lt;sup&gt;2&lt;/sup&gt;に適用すると、すべての水田で水深を深くして強制落水を行った場合、この地域から琵琶湖北湖への全窒素と全リンの負荷率はそれぞれ約2%、約9%になると見積もられた。粗放的水管理の常態化は特にリンの琵琶湖への大きな負荷源となりうることが示された。

    DOI: 10.14903/jslim.69.0.187.0

    CiNii Article

    researchmap

  • Characteristics of the feeding group of termites in the light of food source age

    Hyodo Fujio, Tayasu Ichiro, Wada Eitaro

    Abstracts of the Annual Meeting of the Ecological Society of Japan   52 ( 0 )   581 - 581   2005

     More details

    Publisher:日本生態学会  

    陸上熱帯生態系において、シロアリ群集は落葉・枯死木から土壌有機物にわたる様々な分解過程の有機物を利用することで分解者として重要な役割を果たしている。様々な陸上熱帯生態系におけるシロアリ機能群を評価する一つの指標として、安定炭素・窒素同位体(δ&lt;sup&gt;13&lt;/sup&gt;C・δ&lt;sup&gt;15&lt;/sup&gt;N)が用いられてきた。これらの指標はある時間断面における生産者から始まる食物連鎖での消費者の位置づけを表している。しかし、実際の食物連鎖、特に腐植食物連鎖には生産者が有機物を生産してから消費者によって利用されるまでのタイムラグとして表される時間軸が存在し、消費者が利用する有機物は様々な年齢(古さ)を持つ。&lt;br&gt;本研究ではこの時間軸の指標として、冷戦時の核実験によって生成した放射性炭素同位体(Δ&lt;sup&gt;14&lt;/sup&gt;C)を用いて、シロアリ群集の食物源の年齢の特徴を明らかにすることを目的とした。1998年及び2004年にタイ・サケラート環境研究所の乾燥常緑林において、材木食、落葉食、土壌食の食性を持つシロアリ4種を採集し、そのδ&lt;sup&gt;13&lt;/sup&gt;C・δ&lt;sup&gt;15&lt;/sup&gt;N及びΔ&lt;sup&gt;14&lt;/sup&gt;Cの値を測定した。1998年2004年のサンプル共に土壌食性シロアリ2種は材木食・落葉食性シロアリに比べ高いδ&lt;sup&gt;15&lt;/sup&gt;N値を示した。Δ&lt;sup&gt;14&lt;/sup&gt;C値は同種内では1998年より2004年のサンプルで低い値を示し、大気中の&lt;sup&gt;14&lt;/sup&gt;C O&lt;sub&gt;2&lt;/sub&gt;の1963年以降の減少を反映していると考えられた。別種間では材木食性シロアリのほうが、土壌食性シロアリよりも高いΔ&lt;sup&gt;14&lt;/sup&gt;C値を示し、その食物源の平均年齢は材木食性シロアリで12から18年、土壌食性シロアリで7から12年、落葉食性シロアリで約8年であることが推定された。また、これらの食物源の年齢について、当調査地における土壌有機態炭素の回転時間との関連で考察を行った。

    DOI: 10.14848/esj.ESJ52.0.581.0

    CiNii Article

    researchmap

  • 施設9 サルの臓器間の炭素・窒素同位対比の変動(X.共同利用研究 2.共同利用研究成果)

    和田 英太郎, 田中 洋之, 兵藤 不二夫

    霊長類研究所年報   34 ( 34 )   153 - 153   2004.9

     More details

    Language:Japanese   Publisher:京都大学霊長類研究所  

    CiNii Article

    CiNii Books

    researchmap

  • Material Cyclings and Water Resources with Emphasis on a Watershed

    WADA Eitaro, TAYASU Ichiro, HYODO Fujio

    Energy and resources   24 ( 1 )   27 - 33   2003.1

     More details

    Language:Japanese   Publisher:エネルギー・資源学会  

    CiNii Article

    CiNii Books

    researchmap

  • キノコシロアリ亜科におけるキノコ栽培の役割とその進化

    兵藤 不二夫, 陀安 一郎, 井上 徹志, 前川 清人, 三浦 徹, 竹松 葉子, 松本 忠夫, 東 順一, 安部 琢哉

    日本生態学会大会講演要旨集   50 ( 0 )   250 - 250   2003

     More details

    Language:Japanese   Publisher:日本生態学会  

    CiNii Article

    researchmap

  • 安定同位体を用いたシロアリとミミズの食性と機能の比較について

    陀安 一郎, 兵藤 不二夫, Konate Souleymane, Tondoh Jerome E, Lavelle Patrick

    日本生態学会大会講演要旨集   50 ( 0 )   221 - 221   2003

     More details

    Language:Japanese   Publisher:日本生態学会  

    CiNii Article

    researchmap

  • Termites in a dry evergreen forest in Thailand: species diversity, abundance and ecosystem function.

    Hyodo, F, I. Tayasu, T. Inoue, Y. Takematsu, A. Fujita, A. Yamada, T. Kumai, N. Kirtibutr, C. Klangkaew, A. Sugimoto, T. Abe

    An integrated study on biodiversity conservation under global change and bioinventry management system. Kyoto University   186 - 198   2002

     More details

    Language:English  

    researchmap

  • B110 タイのDEFおよびDDFにおけるシロアリの種多様性とfunctional group組成(形態学・組織学,発生学・遺伝学,生活史・分布)

    竹松 葉子, 阿部 琢哉, 兵藤 不二夫, 杉本 敦子

    日本応用動物昆虫学会大会講演要旨   ( 44 )   22 - 22   2000.3

     More details

    Language:Japanese   Publisher:日本応用動物昆虫学会  

    CiNii Article

    CiNii Books

    researchmap

▼display all

Research Projects

  • 森林草原生態系の一体的管理を目指す:森林に遺された過去の草原性種子からの挑戦

    Grant number:22H03797  2022.04 - 2026.03

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    小山 明日香, 兵藤 不二夫, 山本 節子, 内田 圭

      More details

    Grant amount:\17030000 ( Direct expense: \13100000 、 Indirect expense:\3930000 )

    researchmap

  • ミミズの土壌肥沃度改善機能の活用に向けてー圃場実証と機能の定量化ー

    Grant number:21H02335  2021.04 - 2026.03

    日本学術振興会  科学研究費助成事業 基盤研究(B)  基盤研究(B)

    金田 哲, 池田 紘士, 米村 正一郎, 兵藤 不二夫, 舟山 健, 和穎 朗太, 伊藤 通浩, 上野 秀人

      More details

    Grant amount:\17290000 ( Direct expense: \13300000 、 Indirect expense:\3990000 )

    researchmap

  • 鳥類標本の羽から探る生態と種分化

    Grant number:21H00622  2021.04 - 2026.03

    日本学術振興会  科学研究費助成事業 基盤研究(B)  基盤研究(B)

    武山 智博, 小高 信彦, 水田 拓, 岩見 恭子, 富田 直樹, 兵藤 不二夫

      More details

    Grant amount:\17160000 ( Direct expense: \13200000 、 Indirect expense:\3960000 )

    researchmap

  • Role of soil microbial function and diversity on determining soil fertility along a topographic gradient

    Grant number:21H02235  2021.04 - 2025.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    舘野 隆之輔, 徳地 直子, 廣部 宗, 兵藤 不二夫, 磯部 一夫

      More details

    Grant amount:\17160000 ( Direct expense: \13200000 、 Indirect expense:\3960000 )

    researchmap

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

    Grant number:21H03650  2021.04 - 2024.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    齋藤 光代, 濱田 麻友子, 兵藤 不二夫, 小野寺 真一, 作野 裕司

      More details

    Grant amount:\17290000 ( Direct expense: \13300000 、 Indirect expense:\3990000 )

    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.

    researchmap

  • Spiders eat insects - but Why are ant-mimicking jumping spiders vegetarian?

    Grant number:21K06310  2021.04 - 2024.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    橋本 佳明, 市岡 孝朗, 兵藤 不二夫, 山崎 健史

      More details

    Grant amount:\4290000 ( Direct expense: \3300000 、 Indirect expense:\990000 )

    当初は,台湾での海外調査を計画をしていたが,コロナ禍で実施できなかった為、R4年度にこれらを実施する予定

    researchmap

  • Effects of soil environments on responses of ecosystem functions of Collembola communities against to global warming

    Grant number:19K06126  2019.04 - 2022.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    菱 拓雄, 兵藤 不二夫

      More details

    Grant amount:\4420000 ( Direct expense: \3400000 、 Indirect expense:\1020000 )

    土壌生物群集の構造と機能に、長期的な環境条件としての立地条件と、温暖化実験処理の影響がどのように影響するのかについて明らかにする調査を行った。これまで、温暖化の実験の多くは生物群集のそれまで経た環境の経験の影響(レガシーエフェクト)を無視したものが多かった。本研究では近年着目されているレガシーエフェクトにより、立地条件によって土壌性トビムシ群集構造の種構成や機能形質が異なる方向の影響を受けることを明らかにしており、土壌動物群集の機能形質が、山地地形によるレガシーエフェクトの影響を強く受けていることを示す証拠が得られた。
    成果公表として、今年度は温暖化に深く関係する自然の環境傾度である標高と、季節変動が、トビムシ群集の種、個体形質に強く影響し、特に強いストレスがかかる冬にのみ形質選択が生じ、それ以外の季節には標高による形質選択が生じないという形質選択の季節依存性を見出したという発見について国際学会で発表を行った(ICSZイタリア、オンライン)。また、日本で現在消失している下層植生の密度が土壌の安定性を増加させるプロセスをトビムシ群集から説明できることを示す研究成果を国際学会で発表した(ICA、イタリア、オンライン)。また、標高傾度や、日本の気候傾度に沿ってトビムシ群集の形質値がどのように変化するのかについても国内学会(日本土壌動物学会、日本生態学会)で発表を行った。
    また、この研究が前提としている斜面方位での土壌動物群集の違いについて、査読付き学術専門誌上で英語論文を公表済みである。
    本研究課題での実験結果は充分に意義あるものであり、関連する研究結果の公表は十分に行っている状況である。したがって当該年度の実績は順調に進捗しているといえる。

    researchmap

  • Ant-mimicking effects increase species diversity in Myrmarachne spiders

    Grant number:18K06386  2018.04 - 2021.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Hashimoto Yoshiaki

      More details

    Grant amount:\4290000 ( Direct expense: \3300000 、 Indirect expense:\990000 )

    The precise ant mimicry of Myrmarachne jumping spiders (Salticidae) has been attributed to their high defensive effectiveness against predators. In this study, we found that the ant mimicry of Myrmarachne spiders reduces their ability to capture prey and shifts their diet to a plant-based source, and that the spider species have the habit of remaining close to their mimetic model ant species, which indicates the possibility of the spider using the nectar glands and other food sources monopolized by the mimetic model ant species in their territory. Furthermore, our DNA phylogenetic analysis revealed that speciation to the same mimetic model ant species occurs repeatedly in different phylogenetic lineages of Myrmarachne jumping spiders. These findings suggest that ant mimicry in Myrmarachne jumping spiders is a strategy for coexistence with mimetic model ants and a mechanism for creating species diversity in the spider genus.

    researchmap

  • 同位体から昆虫の機能形質を評価する

    Grant number:17H01912  2017.04 - 2021.03

    日本学術振興会  科学研究費助成事業 基盤研究(B)  基盤研究(B)

    兵藤 不二夫, 菱 拓雄, 黒川 紘子, 岸本 圭子

      More details

    Grant amount:\16900000 ( Direct expense: \13000000 、 Indirect expense:\3900000 )

    地球規模で生じている生物の種構成の変化が,生態系機能に及ぼす影響を明らかにすることは環境学の重要な課題である.現在,植物群集の種ごとの機能形質をもとに,その生態系機能を評価する研究が広く行われている.一方,多様な表現型を持つ昆虫など動物については,共通の機能形質を測定することが困難なため,そのような研究はほとんどない.本研究では,動物の食性を反映する同位体を用いて,昆虫の生態系機能に関連する形質を評価することを目的としている。本年度はまず調査方法の確立を行い、その後、当初予定していたモニタリング1000の3サイト(半田山(岡山県)、椎葉(宮崎県)、小佐渡(新潟県))において6月と9月の2度にわたりアリ類、トビムシ類、糞虫類や土壌有機物(リターと土壌)の採集を行った。昆虫試料については、個体数の計測や同定、同位体分析用試料の作成を行った。土壌試料については栄養塩の測定等、土壌特性の評価を行った。その結果、これら3地点での昆虫群集組成の違いや調査地ごとの特性が把握できた。昆虫試料の一部については連続フロー型同位体比質量分析計を用いて炭素、窒素同位体分析を行った。また、放射性炭素濃度については、封管法により昆虫試料から二酸化炭素を生成、グラファイトを作成し、加速器質量分析計によって放射性炭素分析を行った。また、一部の昆虫については形態計測を行い、外部形態に基づく形質評価も行った。現在、これら得られたデータの解析中である。

    researchmap

  • Plant-soil feedbacks in a forest ecosystem governed by functional traits of tree species

    Grant number:17H03736  2017.04 - 2021.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    KUROKAWA HIROKO

      More details

    Grant amount:\17550000 ( Direct expense: \13500000 、 Indirect expense:\4050000 )

    This study aimed to examine the role of plant-soil feedback in tree community assembly and multi-species coexistence mechanism using a trait-based approach. In a 1.2-ha study plot in the Ogawa Forest Reserve (Ibaraki), where population dynamic data and functional traits of adult and juvenile trees on all coexisting tree species have been accumulated, trait data of current-year seedlings and seedlings older than one year were newly collected. In addition, soil biotic and abiotic properties were measured at 10m x 10m grid points within the study area to develop the spatial data on soil properties. This allowed us to analyze the relationship between plant functional traits and population dynamics across growth stages and to analyze the determinants of soil properties. We found that soil properties are influenced by the community-weighted mean of some functional traits of above-ground trees and litter pool on the forest floor.

    researchmap

  • Effects of environmental farming system on soil function of earthworm

    Grant number:16H05058  2016.04 - 2020.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    KANEDA Satoshi

      More details

    Grant amount:\17030000 ( Direct expense: \13100000 、 Indirect expense:\3930000 )

    The objective of this study are estimation of variation of earthworm soil aggregate formation and earthworm density by environmental farming system like weed cover mulching and organic farming. In this study, life-forms of earthworm were classified, and earthworm community were investigated in orchard of weed cover mulching and organic farming. Relationship between soil parameters and soil aggregate formation rate by earthworm were studied. Seventeen species life-forms could be classified. Weed cover mulching enhanced density of epigeic species. There was no relationship between soil properties and soil aggregation formation rate. Therefore, previous studies results, relationship between soil aggregate formation rate and soil moisture, temperature and worm weight applied to field survey. According to the estimation, organic farming enhanced soil aggregate formation rate.

    researchmap

  • Ecological study of the African great apes under human disturbance

    Grant number:16H02753  2016.04 - 2019.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    Yumoto Takakazu

      More details

    Grant amount:\36530000 ( Direct expense: \28100000 、 Indirect expense:\8430000 )

    The research was conducted on Western gorillas in the Gabonese Republic, bonobos in the Democratic Republic of Congo, and chimpanzees in Republic of Uganda, under the human-dominant landscape, mainly for their habitat uses and food selections. These African great apes are regarded as representatives of the primeval tropical forests. However, in reality, they depend largely on the fruits and leaves of pioneer plants or terrestrial herbs which are characteristic of secondary forests. The functional traits of the leaves of the tree species were examined, and we found that tree species in the secondary forest have the higher protein and the lower tannin content than those in the primary forest. These functional traits of the leaves are the desirable properties as a food of wild primates.

    researchmap

  • Evaluation of stability of a tropical rainforest food web through isotope anlayses

    Grant number:16K14811  2016.04 - 2019.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research  Grant-in-Aid for Challenging Exploratory Research

    Fujio Hyodo, Itioka Takao

      More details

    Grant amount:\3640000 ( Direct expense: \2800000 、 Indirect expense:\840000 )

    Tropical rainforests are one of the ecosystems that have highest biodiversity, and the food webs have long been considered to be stable. However, the stability of the tropical rainforest food webs is poorly investigated because of the technical difficulty. In this study, we applied stable carbon and nitrogen isotopes of bulk samples, nitrogen isotopes of amino acids, and radiocarbon to investigate the feeding habits of Hymenopterans sampled in a tropical rainforest. Our results showed that there was no clear difference in their feeding habits during seven years, supporting the view on the stability of tropical rainforest food webs.

    researchmap

  • Exploring the trophic source of marine ecosystem using isotope analysis: Towards the development of marine ecosystem conservation index in the Western North Pacific

    Grant number:16H02947  2016.04 - 2019.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    AITA Maki, YAMAGUCHI Atsushi

      More details

    Grant amount:\18200000 ( Direct expense: \14000000 、 Indirect expense:\4200000 )

    We analyzed carbon and nitrogen stable isotope ratios of zooplankton from the sub-arctic to tropical western North Pacific and the Chukchi Sea. Our results clearly showed that a similar regularity between the food chain and the N / C isotope ratio, regardless structure of the food web and biological species. Isotopic analysis of meso-zooplankton community in the Kuroshio current region suggested that the offshore area use energy sources derived from regenerative nutrient and nitrogen fixation. In addition, the isotopic ratios of the community of diatoms, cyanobacteria and juvenile fish, large phytoplankton is minor as a trophic source of meso-zooplankton community in the Kuroshio and major prey items of fish larvae are small copepods.

    researchmap

  • Detect the vulnerable area for N saturation based on new concept of N saturation

    Grant number:15H04515  2015.04 - 2019.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    Tokuchi Naoko, Koba Keisuke, Ohte Nobuhito

      More details

    Grant amount:\16250000 ( Direct expense: \12500000 、 Indirect expense:\3750000 )

    The stream water data with high NO3 concentration and high NO3-O isotope ratio was analyzed by GIS and random forest. In GIS we prepared the data; vegetation, climate, N deposition etc. Using random forest the high contributed factor was chosen.
    It results that the N saturation is caused by N deposition, especially N deposition during the growing season.

    researchmap

  • Evaluation for vulnerability of semi-arid ecosystem on the Loess Plateau against changing precipitation regime.

    Grant number:15H05113  2015.04 - 2019.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    TATENO Ryunosuke, TATSUMI Chikae, DU Sheng, SHI Weiyu

      More details

    Grant amount:\17030000 ( Direct expense: \13100000 、 Indirect expense:\3930000 )

    This study aimed to investigate the how semi-arid ecosystems change in response to precipitation variations under future climate change by focusing on soil nitrogen dynamics and soil microbes. In this study, we conducted several experiments such as the field survey along the precipitation gradient, the small plot scale rainfall manipulation experiment, the in-situ soil exchange incubation experiment, and the moisture manipulation laboratory soil incubation experiment on semi-arid forests near arid boundary on the Loess Plateau, China. In this study, we revealed the responses in soil nitrogen dynamics and soil microbial communities to short- and long-term changes in precipitation and soil moisture on semi-arid ecosystems.

    researchmap

  • Study on host preference of parasitoid Diptera with stable isotope analysis and In vitro experiment

    Grant number:26440220  2014.04 - 2017.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    TACHI TAKUJI, NAKAMURA Satoshi

      More details

    Grant amount:\4940000 ( Direct expense: \3800000 、 Indirect expense:\1140000 )

    Tachinid flies are endoparasitoid of other insects and arthropods, and their larvae feed on the host body. We study information on hosts of the tachinid larvae with carbon and nitrogen isotope analysis for adults and In vitro experiment for larvae. In the isotope analysis, the data can roughly distinguish parasitoids from the other feeding habits such as saprophagy and organic decomposers. In particular, the saprophagous flies are usually very high in the nitrogen isotope ratio. However, there are individual and geographical variations in these isotope data and these variations grow with high trophic level. In the breeding experiments, isotope fractionation is confirmed to occur in insect metamorphosis and biological interactions. The interactions of this study are between plants (artificial diet)-phytophagous insects (hosts)- predator (parasitoids). Artificial medium with body fluid of host species (Mythimna separate) is developed for a tachinid species, Exorista japonica.

    researchmap

  • Quantfication of high-resolution ecosystem model for predicting changes in climate and human activity in Mongolia

    Grant number:25304003  2013.04 - 2017.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    ISHII Reiichiro

      More details

    Grant amount:\13130000 ( Direct expense: \10100000 、 Indirect expense:\3030000 )

    Field observation in Mongolian forest-steppe transition zone and analysis of its soil organic components were conducted to obtain feasible quantitative parameters for vegetation transition model. We clarified following quantitative features for the interactions between the two vegetation types and between vegetation development and soil formation: 1) Forest vegetation has been present there at least for 150 years while the soil organic matters aged 600-800 years in grass-covered area and about 6500 years in forest stand, which could provide quantitative parameters for time-scale of the vegetation transition; 2) Soil organic matters sampled from either vegetation types not always exhibit clear identity of the current vegetation type, from which we could expect that several vegetation transitions might have been occurred in the thousands years' past possibly induced by human activity or forest fire.

    researchmap

  • Comparison of Primate Communities Including Great Apes and Forest Structure

    Grant number:25257407  2013.04 - 2016.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)  Grant-in-Aid for Scientific Research (A)

    Yumoto Takakazu

      More details

    Grant amount:\40690000 ( Direct expense: \31300000 、 Indirect expense:\9390000 )

    The political and social situation of the target site, Danam Valley in Sabah Malaysia has not improved, so that we changed the site into Kinabatamgan in Sabah, Malaysia. We obtained study permission as well as export plant specimen, and did a survey. As a results of the research project, we obtained behavioral and ecological data on gorillas, chimpanzees, bonobos, and orangutans as well as data on vegetation and plant functional characteristics of main components.

    researchmap

  • Radiocarbon reveals residence time of carbon driving belowground food webs

    Grant number:25840158  2013.04 - 2016.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)  Grant-in-Aid for Young Scientists (B)

    Hyodo Fujio

      More details

    Grant amount:\4420000 ( Direct expense: \3400000 、 Indirect expense:\1020000 )

    The goal of this study is to explore the diet ages of consumers in three forest ecosystems with different climates. The estimation of diet age can be performed by using natural abundance of radiocarbon. The results showed that diet ages of soil invertebrates did not differ among the studies sites, despite great difference in soil properties, such as soil respiration and radiocarbon concentrations.

    researchmap

  • Designing soil food web strucute for sustainable plant production

    Grant number:25281053  2013.04 - 2016.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    Kaneko Nobuhiro, NAKAMORI Taizo, HIURA Tsutom, KOMATSUZAKI Masakazu, SHIMANO Satoshi, HYODO Fujio, KARASAWA Shigenori

      More details

    Grant amount:\18070000 ( Direct expense: \13900000 、 Indirect expense:\4170000 )

    The effects of land management on soil food web structure and its effects on soil nutrient cycling were studied to enable sustainable land use. Biodiversity data in Japan was reviewed. After clear cut of forest, decomposition of soil organic matter has been promoted and this effect continued for long-term. Under no-tillage weed mulch cover management, nitrogen mineralization potential, biomass of soil microbes and fauna were higher than tillage treatment, Biomass of AM mycorrhiza was especially higher in no-tillage. Reducing soil disturbance can maintain soil food web structure with higher biomass in all trophic level, and this change can succefully support plant growth.

    researchmap

  • Does ant-mimicry function as a mechanism for creation of biodiversity and coexistence of multi-species in tropical forests?

    Grant number:24570109  2012.04 - 2015.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    HASHIMOTO Yoshiaki, ITIOKA Takao, ENDO Tomoji, HYODO Fujio

      More details

    Grant amount:\5590000 ( Direct expense: \4300000 、 Indirect expense:\1290000 )

    Ant-mimic spiders mainly occur in the tropical regions. Since ant diversity is especially high in the tropics, it seems that the remarkable diversity of ant-mimic spiders in tropics is associated with the diversity of ants. To assess this assumption, the present study examined how ant biodiversity reflects on biodiversity of the mimic spiders in tropical forests. Using morphometric tools to analyze objectively visual resemblance between them, we can detect supporting evidence that diverse patterns of ant-mimic spiders were closely associated with diversity patterns of sympatric ants. Furthermore, using stable isotope analysis and experiment of predation, we can also find mimetic association of ant-mimic spiders to ant models affects their foraging behavior, which may function as food segregations among them. These results indicate that ant-mimicry may play as a mechanism of creating species diversity and promoting coexistence of multiple species in tropical forests.

    researchmap

  • Study of ecosystem structure and carbon cycling using radiocarbon concentration and molecular level isotope analysis

    Grant number:22370011  2010 - 2012

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    TAYASU Ichiro, UCHIDA Masao, HYODO Fujio

      More details

    Grant amount:\18720000 ( Direct expense: \14400000 、 Indirect expense:\4320000 )

    We have done a watershed-level study of the relationship between carbon cycling and ecosystem structure using the measurement of carbon-14 concentrations (Δ^14C value) and nitrogen isotope ratios of individual amino acids. Δ^14C value indicated that carbon source of river food web was both sequestered carbon from watershed and ambient CO_2. The contribution of both pathways depended on the relative importance of algal production (in-stream production) and terrestrial litter input.

    researchmap

  • Changes in plant nitrogen sources during boreal forest succession

    Grant number:22770020  2010 - 2011

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)  Grant-in-Aid for Young Scientists (B)

    HYODO Fujio

      More details

    Grant amount:\3510000 ( Direct expense: \2700000 、 Indirect expense:\810000 )

    To examine whether plants change nitrogen sources during boreal forest succession, I measured nitrogen isotopic signatures of plants and soil nitrogen across two chronosequences of time frame of approximately 400 years and 5000 years in northern Sweden. I found that the nitrogen isotopic signatures significantly changed along the forest succession. Based on the preliminary results on nitrogen isotope ratios of dissolved nitrogen sources in soil, these results suggest that the importance of dissolved organic nitrogen, biological nitrogen fixation by mosses, and nitrogen derived from mycorrhizal fungi as plant nitrogen source change along the forest succession.

    researchmap

  • 生体構成有機物の年令からみた陸上生態系の食物網の構造

    Grant number:03J09346  2003 - 2005

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    兵藤 不二夫

      More details

    Grant amount:\3700000 ( Direct expense: \3700000 )

    二酸化炭素の形で大気中にある放射性炭素(^<14>CO_2)は宇宙線の作用による上空での生成と放射性崩壊(半減期:5730年)による消失のバランスにより、大気中ではおおよそ一定量に保たれている。しかし、^<14>Cは冷戦期の核実験によって大量に作られ、その後1963年の核実験禁止条約の締結後、急激に減少している。本研究では、その核実験によって大量に作られた^<14>Cをトレーサーとして用いて、陸上食物網の構造に時間軸を導入することを目的としている。すなわち、大気14Cは光合成によって植物に取り込まれ、その年々の減少は植物の一次生産物にも反映されている。よって、これまでの既知の大気14Cの記録と消費者の体の^<14>C含量を測定し比較することで何年前に作られた一次生産物であるをその消費者は利用しているかが明らかになる。
    従来の食物網の研究では一次生産から消費者へとつながる様々な量の物質やエネルギーの流れを対象としていたが、それらの流れには別の軸、すなわち時間軸が存在することはあまり考慮されていなかった。そこでの時間軸とは、植物が大気中の二酸化炭素を固定してから、その一次生産物が消費者によって利用されるまでの時間である。私はこの時間軸のことを食物年齢(diet age)と定義した。
    本研究では熱帯生態系の重要な分解者であるシロアリを対象にその食物年齢を上述の14C分析から推定した。その結果、シロアリの食物年齢は7年から50年という幅をもつこと、また土壌食シロアリでは7-13年、木材食シロアリでは12-18年などその食性に応じた値を持つことが明らかとなった。また熱帯雨林の主要な送粉者であるハリナシバチ、ミツバチの14C含量を測定したところ、ハリナシバチでは2-4年、ミツバチでは0年と同じ生食食物網に属する生物間でも、食物年齢が異なることが明らかとなった。

    researchmap

  • キノコシロアリ亜科におけるキノコ栽培の進化

    Grant number:00J03013  2000 - 2001

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    兵藤 不二夫

      More details

    Grant amount:\2000000 ( Direct expense: \2000000 )

    researchmap

▼display all

 

Class subject in charge

  • Laboratory in Biology (2024academic year) 1st and 2nd semester  - 月5~8

  • Laboratory in Environmental Ecology 2-1 (2024academic year) Third semester  - 木5~8

  • Laboratory in Environmental Ecology 2-2 (2024academic year) Fourth semester  - 木5~8

  • Course Seminar 3 (2024academic year) 1st and 2nd semester  - その他

  • Course Seminar 4 (2024academic year) 3rd and 4th semester  - その他

  • Undergraduate's-level thesis research (2024academic year) 1st-4th semester  - その他

  • Isotope Ecology (2024academic year) Prophase  - 水5~6

  • Laboratory Biology (2024academic year) 1st and 2nd semester  - その他

  • Biology (Environment, Ecology and Evolution) (2024academic year) Fourth semester  - 木1~2

  • Seminar in Forest Ecology (2024academic year) Prophase  - その他

  • Seminar in Forest Ecology (2024academic year) Late  - その他

  • Seminar in Forest Ecology (2024academic year) Late  - その他

  • Forest Biology (2024academic year) Late  - その他

  • Advanced Study (2024academic year) Other  - その他

  • Laboratory Environmental Ecology 2-1 (2024academic year) Third semester  - 木5,木6,木7,木8

  • Laboratory Environmental Ecology 2-2 (2024academic year) Fourth semester  - 木5,木6,木7,木8

  • Topics in Ecology 1 (2024academic year) 1st semester  - 金3,金4

  • Topics in Ecology 1 (2024academic year) 1st semester  - 金3~4

  • Seminars in Special Field of Study 1 (2024academic year) 1st and 2nd semester  - その他

  • Seminars in Special Field of Study 2 (2024academic year) 3rd and 4th semester  - その他

  • Terrestrial Ecology (2024academic year) Fourth semester  - 月3,月4

  • Laboratory in Environmental Ecology 2-1 (2023academic year) Third semester  - 木5~8

  • Laboratory in Environmental Ecology 2-2 (2023academic year) Fourth semester  - 木5~8

  • Course Seminar 3 (2023academic year) 1st and 2nd semester  - その他

  • Course Seminar 4 (2023academic year) 3rd and 4th semester  - その他

  • Undergraduate's-level thesis research (2023academic year) 1st-4th semester  - その他

  • Isotope Ecology (2023academic year) Prophase  - 水5,水6

  • Isotope Ecology (2023academic year) Prophase  - 水5~6

  • Biology (Environment, Ecology and Evolution) (2023academic year) Fourth semester  - 木1~2

  • Seminar in Forest Ecology (2023academic year) Prophase  - その他

  • Seminar in Forest Ecology (2023academic year) Prophase  - その他

  • Seminar in Forest Ecology (2023academic year) Prophase  - その他

  • Seminar in Forest Ecology (2023academic year) Late  - その他

  • Seminar in Forest Ecology (2023academic year) Late  - その他

  • Seminar in Forest Ecology (2023academic year) Late  - その他

  • Seminar in Forest Ecology (2023academic year) Late  - その他

  • Forest Biology (2023academic year) Late  - その他

  • Forest Biology (2023academic year) Late  - その他

  • Special Research (2023academic year) Year-round  - その他

  • Advanced Study (2023academic year) Other  - その他

  • Laboratory Environmental Ecology 2-1 (2023academic year) Third semester  - 木5,木6,木7,木8

  • Laboratory Environmental Ecology 2-2 (2023academic year) Fourth semester  - 木5,木6,木7,木8

  • Topics in Ecology 1 (2023academic year) 1st semester  - 金3,金4

  • Topics in Ecology 1 (2023academic year) 1st semester  - 金3~4

  • Seminars in Special Field of Study 1 (2023academic year) 1st and 2nd semester  - その他

  • Seminars in Special Field of Study 2 (2023academic year) 3rd and 4th semester  - その他

  • Terrestrial Ecology (2023academic year) Fourth semester  - 月3,月4

  • Laboratory in Environmental Ecology 2-1 (2022academic year) Third semester  - 木5~8

  • Laboratory in Environmental Ecology 2-2 (2022academic year) Fourth semester  - 木5~8

  • Course Seminar 3 (2022academic year) 1st and 2nd semester  - その他

  • Course Seminar 4 (2022academic year) 3rd and 4th semester  - その他

  • Undergraduate's-level thesis research (2022academic year) 1st-4th semester  - その他

  • Isotope Ecology (2022academic year) Prophase  - 水5,水6

  • Biology (Environment, Ecology and Evolution) (2022academic year) Fourth semester  - 木1~2

  • Seminar in Forest Ecology (2022academic year) Prophase  - その他

  • Seminar in Forest Ecology (2022academic year) Late  - その他

  • Seminar in Forest Ecology (2022academic year) Late  - その他

  • Seminar in Forest Ecology (2022academic year) Prophase  - その他

  • Forest Biology (2022academic year) Late  - その他

  • Special Research (2022academic year) Year-round  - その他

  • Laboratory Environmental Ecology 2-1 (2022academic year) Third semester  - 木5,木6,木7,木8

  • Laboratory Environmental Ecology 2-2 (2022academic year) Fourth semester  - 木5,木6,木7,木8

  • Introduction to Environmental Ecology 1 (2022academic year) Third semester  - 水3,水4

  • Introduction to Environmental Ecology 1 (2022academic year) Third semester  - 水3~4

  • Introduction to Environmental Ecology 2 (2022academic year) Fourth semester  - 水3,水4

  • Introduction to Environmental Ecology 2 (2022academic year) Fourth semester  - 水3~4

  • Topics in Ecology 1 (2022academic year) 1st semester  - 金3,金4

  • Topics in Ecology 1 (2022academic year) 1st semester  - 金3~4

  • Seminars in Special Field of Study 1 (2022academic year) 1st and 2nd semester  - その他

  • Seminars in Special Field of Study 2 (2022academic year) 3rd and 4th semester  - その他

  • Terrestrial Ecology (2022academic year) Fourth semester  - 月1,月2

  • Laboratory in Environmental Ecology 2-1 (2021academic year) Third semester  - 木5,木6,木7,木8

  • Laboratory in Environmental Ecology 2-2 (2021academic year) Fourth semester  - 木5,木6,木7,木8

  • Course Seminar 1 (2021academic year) 1st and 2nd semester  - 水3

  • Course Seminar 2 (2021academic year) 3rd and 4th semester  - 水3

  • Course Seminar 3 (2021academic year) 1st and 2nd semester  - その他

  • Course Seminar 4 (2021academic year) 3rd and 4th semester  - その他

  • Undergraduate's-level thesis research (2021academic year) 1st-4th semester  - その他

  • Isotope Ecology (2021academic year) Prophase  - 水5,水6

  • Biology (Environment, Ecology and Evolution) (2021academic year) Fourth semester  - 木1~2

  • Seminar in Forest Ecology (2021academic year) Prophase  - その他

  • Seminar in Forest Ecology (2021academic year) Late  - その他

  • Seminar in Forest Ecology (2021academic year) Late  - その他

  • Seminar in Forest Ecology (2021academic year) Prophase  - その他

  • Forest Biology (2021academic year) Late  - その他

  • Special Research (2021academic year) Year-round  - その他

  • Laboratory Environmental Ecology 2-1 (2021academic year) Third semester  - 木5,木6,木7,木8

  • Laboratory Environmental Ecology 2-2 (2021academic year) Fourth semester  - 木5,木6,木7,木8

  • Topics in Ecology 1 (2021academic year) 1st semester  - 金3,金4

  • Seminars in Special Field of Study 1 (2021academic year) 1st and 2nd semester  - その他

  • Seminars in Special Field of Study 2 (2021academic year) 3rd and 4th semester  - その他

  • Laboratory in Environmental Ecology 2-1 (2020academic year) Third semester  - 木5,木6,木7,木8

  • Laboratory in Environmental Ecology 2-2 (2020academic year) Fourth semester  - 木5,木6,木7,木8

  • Course Seminar 3 (2020academic year) 1st and 2nd semester  - その他

  • Course Seminar 4 (2020academic year) 3rd and 4th semester  - その他

  • Undergraduate's-level thesis research (2020academic year) 1st-4th semester  - その他

  • Isotope Ecology (2020academic year) Prophase  - 水5,水6

  • Biology (Environment, Ecology and Evolution) (2020academic year) Fourth semester  - 木1,木2

  • Seminar in Forest Ecology (2020academic year) Prophase  - その他

  • Seminar in Forest Ecology (2020academic year) Late  - その他

  • Seminar in Forest Ecology (2020academic year) Late  - その他

  • Seminar in Forest Ecology (2020academic year) Prophase  - その他

  • Forest Biology (2020academic year) special  - その他

  • Special Research (2020academic year) Year-round  - その他

  • Laboratory Environmental Ecology 2-1 (2020academic year) Third semester  - 木5,木6,木7,木8

  • Laboratory Environmental Ecology 2-2 (2020academic year) Fourth semester  - 木5,木6,木7,木8

  • Topics in Ecology 1 (2020academic year) 1st semester  - 金3,金4

  • Seminars in Special Field of Study 1 (2020academic year) 1st and 2nd semester  - その他

  • Seminars in Special Field of Study 2 (2020academic year) 3rd and 4th semester  - その他

▼display all