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Terada Chisato

Graduate School of Humanities and Human Sciences Division of Human Sciences Department of Regional ScienceAssistant Professor

Researcher basic information

■ Degree
  • Ph.D. in Environmental Science, Hokkaido University
■ URL
researchmap URLホームページURL■ Various IDs
J-Global ID■ Research Keywords and Fields
Research Keyword
  • 保全生態学
  • 環境教育学
  • Wildlife management
  • sika deer
  • Evolutionary Biology
  • Landscape genetics
  • Mammalogy
Research Field
  • Life Science, Ecology and environment
■ Educational Organization

Career

■ Career
Career
  • Apr. 2025 - Present
    Hokkaido University, 大学院文学研究院 人間科学部門 地域科学分野, 助教
  • May 2023 - Present
    合同会社エゾリンク
  • Jun. 2016 - Mar. 2024
    Hokkaido University, Field Science Center for Northern Biosphere, 学術研究員
  • Apr. 2015 - May 2016
    Hokkaido University, Field Science Center for Northern Biosphere, 研究員
  • Apr. 2012 - Mar. 2015
    Hokkaido University, Field Science Center for Northern Biosphere, 専門研究員
  • Apr. 2014 - Jun. 2014
    Hokkaido University, Faculty of Agriculture, 非常勤講師
  • Oct. 2013 - Feb. 2014
    森林総合研究所北海道支所, 非常勤職員
  • Oct. 2013 - Nov. 2013
    Tokai University, School of Biological Science and Engineering, 非常勤講師
  • Jun. 2012 - Feb. 2013
    リヨン第一大学・フランス国立科学研究センター(CNRS), 進化生物・生態学研究室, 訪問研究員
  • Apr. 2010 - Mar. 2012
    日本学術振興会, 特別研究員 (DC2)
  • Apr. 2009 - Mar. 2010
    Hokkaido University, グローバルGOE RA
Educational Background
  • Apr. 2009 - Mar. 2012, Hokkaido University, 大学院環境科学院, 生物圏科学専攻
  • Apr. 2007 - Mar. 2009, Hokkaido University, 大学院環境科学院, 生物圏科学専攻
  • Apr. 2003 - Mar. 2007, University of Tsukuba, 第二学群, 生物資源学類

Research activity information

■ Papers
  • Context-dependent influences of deer carrion on potential soil microbial litter decomposition in temperate forests of Japan
    Atsushi Takaki; Chisato Terada; Masahiro Nakamura
    Pedobiologia, 116, 151155, 151155, Elsevier BV, Sep. 2026, [Peer-reviewed]
    Scientific journal
  • Soil microbial decomposition capacity and soil properties under moderate warming in a natural forest in the Asian monsoon region
    Masahiro Nakamura; Chisato Terada; Atsushi Takaki; Yuri Kanno; TaeOh Kwon
    The Science of Nature, 112, 5, Springer Science and Business Media LLC, 19 Aug. 2025, [Peer-reviewed]
    Scientific journal
  • Physiological profiling of the soil microbe community using the EcoPlate and assessment of soil properties at 74 planted forest sites across Japan
    Masahiro Nakamura; Chisato Terada; Kinya Ito; Tsutom Hiura; Hideaki Shibata; Takeshi Miki; Taku M. Saitoh; Masahiro Takagi; Toshiyuki Hougen; Shin‐ichiro S. Matsuzaki; Mirai Watanabe; Hiroyuki Tado; Norifumi Hotta; Yoshiko Kosugi; Nobuyuki Aiko; Nagahiro Kojima; Nana Katagiri; Koju Kishimoto; Tomohiro Yoshida; Yuuki Tsunoda; Tatsumi Takamiya; Kosuke Ito; Yasuhiro Utsumi; Tetsuro Yoshikawa; Tanaka Kenta; Miho Oda; Naoki Agetsuma; Masataka Kawai; Toru Fujita; Takuo Hishi; Hiromasa Shimada; Tomoaki Ichie; Kazuhiko Hoshizaki; Hajime Kobayashi; Tatsuyuki Seino; Mahoko Noguchi; Dai Nagamatsu; Haruo Saito; Ryunosuke Tateno; Masae Iwamoto Ishihara; Yoichiro Kitagawa; Yoko Hisamoto; Kosuke Homma; Toshihide Hirao; Tatsuya Otani; Motomu Toda; Jinshi Terada; Tomonori Kume; Karibu Fukuzawa; Atsushi Takashima; Koki Kurose; Sakae Fujii; Shunsuke Itoh; Tamihisa Ohta; Kazuhiko Otsuki; Takuo Nagaike; Kyohei Hasegawa; Kobayashi Makoto; Manabu Shirahata; Sawako Matsuki; Masayuki Hatanaka; Satoshi Suzuki; Noriyuki Muro; Tomoyuki Yamoto; Naoyuki Adachi; Nobuhiro Kaneko; Tamon Yamashita
    Ecological Research, 40, 2, 228, 242, Wiley, 19 Dec. 2024
    Scientific journal, Abstract

    Due to policies supporting large‐scale expansion of plantation forestry, about 40% of the forests in Japan are planted forests, such as Japanese cedar ( Cryptomeria japonica ) and hinoki cypress ( Chamaecyparis obtusa ). We present the largest freely available EcoPlate dataset for planted forests in Japan, comprising data collected from a network of 74 planted forest sites (114 plots) in regions ranging from cool‐temperate to subtropical. The EcoPlate is a 96‐well microplate that contains three sets of 31 “response wells” with different carbon substrates. The utilization of each carbon substrate by the microbial community is quantified based on the color development of the well during incubation, providing a multifunctional index of the soil microbial community. Soil properties (water content, carbon, nitrogen, the carbon/nitrogen (C/N) ratio, and pH) essential for interpreting the EcoPlate results were also analyzed. Using a standardized protocol, soil was sampled between July and November 2021. A preliminary principal coordinate analysis (PCoA) was performed on the temporal integration of color density using the 31 substrates. PCo1 explained 36.5% of the variance of the overall absorbance of all substrates. A model of environmental factors, including elevation, and a model of soil properties, including pH, water content, and carbon, were the best‐fit models. EcoPlate data allow us to test hypotheses related to community ecology and the ecosystem functions of the soil microbial community in planted forests on a regional scale. The complete data set for this abstract published in the Data Article section of the journal is available in electronic format in MetaCat in JaLTER at https://jalter.diasjp.net/data/ERDP-2024-08 .
  • Effects of soil compaction on above- and belowground interactions during the early stage of forest development
    Tsutom Hiura; Hiroya Okada; Chisato Terada; Masahiro Nakamura; Nobuhiro Kaneko
    Urban Forestry & Urban Greening, 102, 128565, Elsevier BV, Dec. 2024, [Peer-reviewed]
    Scientific journal
  • Different responses of herbivore abundance to plant genotypic diversity depending on herbivore host specificity
    Masahiro Nakamura; Bingpin Shan; Hino Takafumi; Chisato Terada
    Trees, 38, 4, 879, 890, Springer Science and Business Media LLC, 15 May 2024, [Peer-reviewed]
    Scientific journal
  • Leaf defense traits of birch, beech, and oak saplings grown under two types of soil in a free-air ozone exposure system
    Cong Shi; Noburu Masui; Takayoshi Koike; Chisato Terada; Masahiro Nakamura; Toshihiro Watanabe
    Journal of Forest Research, 29, 1, 19, 29, Informa UK Limited, 16 Nov. 2023, [Peer-reviewed]
    Scientific journal
  • マゲシカCervus nippon mageshimaeの遺伝的独自性についての再検討
    兼子 伸吾; 亘 悠哉; 高木 俊人; 寺田 千里; 立澤 史郎; 永田 純子
    保全生態学研究, 28, 425, 436, Sep. 2023, [Peer-reviewed]
    Scientific journal
  • Referenced conditions for EcoPlate experiments to measure the multifunctionality of forest soil microbial communities in Wakayama Experimental Forest
    Terada Chisato; Nakamura Masahiro; Zhu Shiyao; Iguchi Hikaru; Takaki Atsushi; Matsui Kazuaki; Shibata Hideaki
    Japanese Journal of Forest Environment, 64, 2, 83, 90, The Japanese Society of Forest Environment, 25 Dec. 2022, [Peer-reviewed]
    Japanese, 炭素は微生物の増殖に関わる重要な元素であるため,炭素基質の利用に関わる機能(機能の多様性と多機能性)の違いは土壌微生物群集を特徴づける指標となる。土壌微生物群集の機能の多様性と多機能性を評価するために,群集レベルでの炭素基質利用機能の生理的プロファイリング法(CLPP:Community level physiological profiles)が用いられている。森林の土壌微生物群集の機能を測定するCLPP手法の一つとして,BIOLOGTM社が開発したエコプレートがある。本研究では,森林土壌を扱ったエコプレート実験を始めようと考えている様々な立場の方々(高校教員,大学生,一般市民,研究者)に,参考となる測定条件の情報を提供することを目的とした。参考となる土壌深度,希釈倍率,風乾期間,吸光度の測定期間を解明するために,和歌山県の典型的な照葉樹二次林の褐色森林土を使って異なる測定条件でエコプレート実験を行った。その結果,本調査地においては表層から10 cm程度の土壌層から土壌を採集して,風乾はせずに(やむを得ない場合,測定まで4 ℃程度の冷蔵庫で保管),抽出液は50倍,100倍,200倍の希釈倍率の間で,吸光度の測定は10~14日間かけて実施することが,土壌微生物群集の機能の多様性と多機能性を正確に評価できる妥当な条件であることを示した。
  • Evaluating the soil microbe community-level physiological profile using EcoPlate and soil properties at 33 forest sites across Japan
    Masahiro Nakamura; Chisato Terada; Kinya Ito; Kazuaki Matsui; Shigeru Niwa; Masae Ishihara; Tanaka Kenta; Tetsuro Yoshikawa; Taku Kadoya; Tsutom Hiura; Hiroyuki Muraoka; Ken Ishida; Naoki Agetsuma; Ryosuke Nakamura; Hitoshi Sakio; Masahiro Takagi; Akira S. Mori; Megumi K. Kimura; Hiroko Kurokawa; Tsutomu Enoki; Tatsuyuki Seino; Atsushi Takashima; Hajime Kobayashi; Kazuho Matsumoto; Koichi Takahashi; Ryunosuke Tateno; Tomohiro Yoshida; Tatsuro Nakaji; Masayuki Maki; Kazutaka Kobayashi; Karibu Fukuzawa; Kazuhiko Hoshizaki; Kazuhide Ohta; Keito Kobayashi; Motohiro Hasegawa; Satoshi N. Suzuki; Michinori Sakimoto; Yoichiro Kitagawa; Akiko Sakai; Hirofumi Kondo; Tomoaki Ichie; Koji Kageyama; Ayaka Hieno; Shogo Kato; Tatsuya Otani; Yasuhiro Utsumi; Tomonori Kume; Kosuke Homma; Koju Kishimoto; Kazuhiko Masaka; Kenta Watanabe; Motomu Toda; Dai Nagamatsu; Yuko Miyazaki; Tamon Yamashita; Naoko Tokuchi
    Ecological Research, 37, 3, 432, 445, 2022, [Peer-reviewed]
    Scientific journal
  • Response of Background Herbivory in Mature Birch Trees to Global Warming
    Masahiro Nakamura; Moeko Minoshima; Chisato Terada; Kentaro Takagi; Kobayashi Makoto; Hideaki Shibata; Tsutom Hiura
    Frontiers in Forests and Global Change, 4, Frontiers Media SA, 22 Sep. 2021, [Peer-reviewed], [International Magazine]
    Scientific journal, Given the time scale based on the duration of exposure to global warming, natural climate-gradient studies and experimental manipulations have detected long-term (decades to centuries) and short-term (years to decades) ecological responses to global warming. Combination of these two complementary approaches within a single study may enable prediction of the likely responses of ecological processes to global warming. To understand how global warming affects plant–herbivore interactions within a canopy of Erman’s birch, we combined an elevational gradient study and a warming experiment involving mature birch trees in which the soil and tree branches were warmed separately. In the elevational gradient study, herbivory by chewing insects and plant growth increased as elevation decreased, and the concentrations of condensed tannins and total phenolics in the leaves decreased. In the warming experiment, soil warming alone increased herbivory, and the addition of branch warming amplified the effect on herbivory. Soil warming alone decreased the tannin concentration, and the addition of branch warming led to a further reduction. The variation in herbivory was best explained by the tannin content of leaves. Our experimental results demonstrate that the decreased tannin content of leaves due to a combination of soil and branch warming was an important driver of increased herbivory in the canopy of the mature birch trees. The similar tendencies in the short- and long-term responses imply that global warming is likely to increase background herbivory in mature birch trees by decreasing the tannin content of leaves in the canopy.
  • Spatial Genetic Structure of the Sika Deer (Cervus nippon) Population on Yakushima: Significant Genetic Differentiation on a Small Island
    Chisato Terada; Tetsukazu Yahara; Arika Kuroiwa; Takashi Saitoh
    Mammal Study, 46, 3, 02 Jun. 2021, [Peer-reviewed]
    Scientific journal
  • Long-term fauna and flora records of the experimental forests of the Forest Research Station of Hokkaido University, Japan
    Terada, Chisato; Kwon, TaeOh; Kazahari, Nobuko; Kishida, Osamu; Utsumi, Shunsuke
    ECOLOGICAL RESEARCH, 34, 3, 349, 349, May 2019, [Peer-reviewed]
    English, Scientific journal
  • Phenotypic and genetic divergence among island populations of sika deer (Cervus nippon) in southern Japan: a test of the local adaptation hypothesis
    Chisato Terada; Takashi Saitoh
    Population Ecology, 60, 3, 211, 221, 01 Jul. 2018, [Peer-reviewed]
    English, Scientific journal
  • Causes of hunting incidents in Japan
    Matsuura Yukiko; Igota Hiromasa; Terada Chisato; Suzuki Masatsugu
    Wildlife and human society, 2, 2, 1, 8, Association of Wildlife and Human Society, 2015, [Peer-reviewed]
    Japanese, We carefully evaluated hunting incidents to identify risk factors and develop preventive measures. We analyzed 1,471 cases that were reported to the Japanese Hunting Association as fraternal insurance between 2007 and 2011. Most hunters responsible for the incidents were in their sixties and were veterans. Although these cases were treated as "hunting" incidents, the number of incidents associated with firearms was low. Only 144 (9.8%) of all "hunting" incidents were related to firearms, and 18.6% of the cases resulted in death. The most frequent factor responsible for firearm-related incidents was improper handling of firearms. In cases where the victim was mistaken for game, at least 61.5% of the victims were wearing fluorescent orange clothing. It was clear that the main cause of firearm-related incidents was violation of basic hunting rules. Therefore, a new qualification system is required for hunters and managers so that they can demonstrate their understanding of basic hunting principles.
  • Temporal change in the spatial genetic structure of a sika deer population with an expanding distribution range over a 15-year period
    Wei Ou; Satomi Takekawa; Toshiya Yamada; Chisato Terada; Hiroyuki Uno; Junco Nagata; Ryuichi Masuda; Koichi Kaji; Takashi Saitoh
    POPULATION ECOLOGY, 56, 2, 311, 325, Apr. 2014, [Peer-reviewed]
    English, Scientific journal
  • Island rule and local adaptation, with emphasis on the effects of island area and topography in Cervus nippon yakushimae
    寺田, 千里; 齊藤, 隆
    生物科学, 66, 1, 24, 29, 日本生物科学者協会 ; 1949-, 2014, [Peer-reviewed]
    Japanese
  • New mtDNA haplotypes of the sika deer (Cervus nippon) found in Hokkaido, Japan suggest human-mediated immigration
    Chisato Terada; Toshiya Yamada; Hiroyuki Uno; Takashi Saitoh
    MAMMAL STUDY, 38, 2, 123, 129, Jun. 2013, [Peer-reviewed]
    English, Scientific journal
  • Ecological correlates and determinants in the geographical variation of deer morphology
    Chisato Terada; Shirow Tatsuzawa; Takashi Saitoh
    OECOLOGIA, 169, 4, 981, 994, Aug. 2012, [Peer-reviewed]
    English, Scientific journal
  • ヤクシカの餌場としての林道脇植生の評価
    寺田, 千里; 立澤,史郎; 川村,貴志; 藤岡,正博
    保全生態学研究, 15, 2, 193, 201, 2010, [Peer-reviewed]
    Japanese
■ Other Activities and Achievements
  • Possibility of Bridging Research and Practical Knowledge in Nature-Based Tourism: Seeking Insights for Transformative Experiences
    Noriko Kosaka, Chisato Terada, Naoki Matsuzawa, Yoshino Ando, Kiyohiko Mizobuchi, THE TOURISM STUDIES, 37, 2, 192, 198, 31 Mar. 2026
    一般社団法人 日本観光研究学会, Japanese, Introduction scientific journal
  • Evaluation of ecological restoration using a simplified construction method of topsoil block transplantation for slope revegetation
    中村 誠宏; 寺田 千里; 湯浅 浩喜; 古田 雄一; 高橋 裕樹; 藤原 拓也; 佐藤 厚子; 孫田 敏; 伊藤 徳彦, 保全生態学研究 = Japanese journal of conservation ecology, 24, 2, 231, 242, Nov. 2019
    [日本生態学会] 保全生態学研究編集委員会, Japanese, Report scientific journal
■ Books and other publications
  • 西之表市史
    上巻 第1編 自然 第三節 脊椎動物 1.種子島の哺乳類. p78-85.
    ぎょうせい, Mar. 2024, [Contributor]
  • Sika deer : life history plasticity and management
    Kaji, Koichi; Uno, Hiroyuki; Iijima, Hayato, Saitoh, T., Terada, C. (2022) Subpopulation Structure Based on Landscape Genetics as a Management Unit. pp. 601-614
    Springer, Jun. 2022, 9789811695537, xii, 641 p., English, [Contributor]
■ Lectures, oral presentations, etc.
  • 動物園における生態学教育の学習効果:Webアプリを用いたプログラムの試み
    寺田 千里; 風張 喜子; 安東 義乃
    日本生態学会第73回大会, 15 Mar. 2026
  • 同⾏者属性による学習効果の違い:動物園でのWebアプリを活⽤した気候変動 教育の試み
    寺田 千里; 風張 喜子; 安東 義乃
    日本環境教育学会 第36 回年次大会(北海道), 11 Oct. 2025
  • シカ死体の腐肉が森林の土壌微生物群集の分解機能を上げる
    髙木惇司; 中村誠宏; 寺田千里
    日本生態学会第72回全国大会, 17 Mar. 2025, Oral presentation
  • 土壌微生物群集の分解機能に対して生前および死後のシカが与える影響
    髙木惇司; 寺田千里; 中村誠宏
    日本生態学会第71回大会, 16 Mar. 2024, Poster presentation
  • 北海道大学のフィールドを活かした野外教育プログラムの開発
    風張喜子; 寺田千里; TaeOh Kwon; 井上貴央; 安東義乃
    日本野外教育学会第6回大会, 01 Jul. 2023, Japanese, Poster presentation
    01 Jul. 2023 - 02 Jul. 2023
  • 大型有蹄類死体が森林土壌微生物の分解多機能性へもたらす効果
    髙木惇司; 寺田千里; 中村誠宏
    日本生態学会第70回大会, 18 Mar. 2023, Oral presentation
  • A Sika Deer Population Can Be Spatially Differentiated Even in a Small Habitat: A Case Study on the Yakushima Island
    Terada C; Yahara T; Kuroiwa A; Saitoh T
    IWMC 5th, Jul. 2015, English, Oral presentation
    [International presentation]
  • Hunting Accidents and Hunter Education in Japan
    Matsuura Y; Igota H; Azumaya M; C Terada; Suzuki M
    IWMC 5th, Jul. 2015, English, Poster presentation
    [International presentation]
  • 個体数密度がヤクシカ個体群に与える影響
    黒岩亜梨花; 三村真紀子; 寺田千里; 田川哲; 黒江美紗子; 新田梢; 布施健吾; 斉藤俊浩; 矢原徹一
    日本生態学会第61回大会, Mar. 2014, Japanese, Poster presentation
    [Domestic Conference]
  • ヤクシカにとって適切な管理ユニットとは? ―島内の遺伝的空間構造に着目して
    寺田千里; 矢原徹一; 黒岩亜梨花; 齊藤隆
    日本生態学会第61回大会, Mar. 2014, Japanese, Poster presentation
    [Domestic Conference]
  • 島嶼ルールと局所適応:ヤクシカを中心に面積と地形の関係について考える
    寺田千里; 齊藤隆
    29回日本霊長類学会・日本哺乳類学会2013年度合同大会, Sep. 2013, Japanese, Oral presentation
    [Domestic Conference]
  • ニホンジカの性的二型は生息地の生産性に依存する
    寺田千里; 齊藤隆; Bonenfant C
    日本生態学会第60回大会, Mar. 2013, Japanese, Poster presentation
    [Domestic Conference]
  • Effects of environmental factors on the geographical differences in morphology in deer: climate and/or topography
    Terada C; Tatsuzawa S; Saitoh T
    EAFES5, Mar. 2012, English, Poster presentation
    [International presentation]
  • 南日本島嶼に生息するニホンジカの形態及び遺伝形質の地理的変異:屋久島個体群に着目した考察.
    寺田千里
    シンポジウム・屋久島研究会:屋久島における科学研究の現在とこれからの展開, Feb. 2012, Japanese, Nominated symposium
    [Domestic Conference]
  • 進化的に重要な単位(ESU)に基づいてニホンジカ個体群を区分する
    寺田千里; 齊藤隆
    日本哺乳類学会2011年大会, Sep. 2011, Japanese, Poster presentation
    [Domestic Conference]
  • 北海道・渡島半島のエゾシカ個体群で発見された特異的なmtDNAハプロタイプについて
    山田敏也; 寺田千里; 竹川聡美; 宇野裕之; 齊藤隆
    日本生態学会第58回大会, Mar. 2011, Japanese, Poster presentation
    [Domestic Conference]
  • ニホンジカの形態形質と分子マーカーを用いた局地適応の検出:屋久島個体群に着目して
    寺田千里; 齊藤隆
    日本生態学会第58回大会, Mar. 2011, Japanese, Poster presentation
    [Domestic Conference]
  • ニホンジカの形態変異に関する遺伝的基盤の実証:動物園個体を用いた疑似コモンガーデンテスト
    寺田千里; 齊藤隆
    第16回野生生物保護学会・日本哺乳類学会2010年度合同大会, Sep. 2010, Japanese, Poster presentation
    [Domestic Conference]
  • 屋久島に生息するシカ個体群の形態形質に関する局地適応の検出
    寺田千里; 齊藤隆
    第26回個体群生態学会・大会 2010, Sep. 2010, Japanese, Poster presentation
    [Domestic Conference]
  • 屋久島のシカは短足か?―島嶼個体群間での形態比較―
    寺田千里; 立澤史郎; 齊藤隆
    日本生態学会第56回大会, Mar. 2009, Japanese, Poster presentation
    [Domestic Conference]
  • 形態的特徴に基づいた屋久島に生息するニホンジカの固有性の評価:周辺6島嶼個体群の比較
    寺田千里; 立澤史郎; 齊藤隆
    Feb. 2009, Japanese, Oral presentation
    [Domestic Conference]
  • 屋久島に生息するニホンジカの形態的特徴
    寺田千里; 立澤史郎; 齊藤隆
    日本哺乳類学会2008年度大会, Sep. 2008, Japanese, Poster presentation
    [Domestic Conference]
  • 伊豆諸島八丈小島におけるノヤギ駆除事業開始後の植生回復状況
    上條隆志; 平田晶子; 川越みなみ; 寺田千里; 仲山真希子; 濱甚吾; 菊池健
    日本生態学会第55回大会, Mar. 2008, Japanese, Poster presentation
    [Domestic Conference]
  • ヤクシカの餌場としての人工林と林道 ~食物現存量と食痕数の季節変化から~
    寺田千里; 立澤史郎; 川村貴志; 藤岡正博
    日本哺乳類学会2007年度大会, Sep. 2007, Japanese, Poster presentation
    [Domestic Conference]
  • ヤクシカの餌場としての林道:食物現存量からの評価
    寺田千里; 立澤史郎; 川村貴志; 藤岡正博
    日本生態学会第54回大会, Mar. 2007, Japanese, Poster presentation
    [Domestic Conference]
■ Affiliated academic society
  • THE MAMMAL SOCIETY OF JAPAN
  • THE ECOLOGICAL SOCIETY OF JAPAN
  • 「野生生物と社会」学会
  • 日本環境教育学会
■ Research Themes
  • ニホンジカにおける局地適応の検出と固有性の評価 : 屋久島個体群に注目して
    科学研究費助成事業
    2010 - 2011
    寺田 千里
    これまでの報告者らの研究で、南日本の島嶼に生息するニホンジカの足の長さは島ごとに異なり、屋久島に生息するシカの足の長さは、他の島個体群に比べて顕著に短いことが分かってきた。この現象は、島の環境の違いによって足の長さの遺伝形質が分化した局地適応の結果ではないかと予測している。本研究の目的はこの仮説を検証し、九州及び周辺島嶼に生息するニホンジカについて、足の長さの進化と維持の機構を理解することである。本年度は、1)足の長さの変異はどのような環境要因が影響して引き起こされたのか、2)形質の変異には遺伝的要因が関わる適応進化を含んでいるのか、について分析し、3)進化によって変異した形質と、歴史的な隔離によって生まれた中立な遺伝的変異に基づいたグルーピングの2つを合わせ、新しいグルーピング法を提案した研究を進め、博士論文の執筆に取り組み、学位を取得した。1)の内容はOecologia誌に掲載され(Terada et al 2012)、EFES5で発表した。3)の内容は日本哺乳類学会2011年度大会で発表し、ポスター賞「優秀賞」を受賞した。これらの研究で、大型哺乳類において初めて、相対的な中手骨の形質変異が局地適応の結果であることを新しい分析手法を使って示した。シカがそれぞれの島に局地適応した形質をもつことによって、それぞれの島の生態系へ異なる選択圧をあたえている可能性があり、今後の生態学的な研究への発展が期待できる。さらに、今回使った手法は実験不可能な他の生物への応用が可能となると考えられる。
    日本学術振興会, 特別研究員奨励費, 北海道大学, 10J02966