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Yuuko Kaneko

    Department of English and American Literature　Professor
Last Updated :2025/04/19

Researcher Information

Research funding number

  • 90280817

ORCID ID

J-Global ID

Research Interests

  • 土壌呼吸   生物多様性保全   riparian forest   サワグルミ   保全遺伝学   トチノキ   

Research Areas

  • Life sciences / Molecular biology
  • Life sciences / Ecology and environmental science
  • Life sciences / Forest science

Academic & Professional Experience

  • 1995/04 - 2015/03  Lake Biwa Environmental Research Institute総合解析部門専門研究員
  • 1992/04 - 1995/03  日本学術振興会特別研究員 (DC1)

Association Memberships

  • 関西自然保護機構   渓畔林研究会   日本植物学会   種生物学会   

Published Papers

Books etc

  • 滋賀県で大切にすべき野生生物: 滋賀県レッドデータブック2020年版
    滋賀県生きもの総合調査委員会編 (Contributorp.85, p.94, p.97, p.117, p.124, p.128, p.134, p.151, p.155, p.166, p.171, p.174, p.183, p.187, p.196, p.208, p.275, p.295, p.227, p.228, p.145, p.232, p.150, p.281, p.169, p.238, p.240, p.217, p.242, p.249, p.289, p.290, p.184, p.223, p.185, p.185, p.187, p.196, p.270, p.274, p.279, p.280, p.288, p.295)サンライズ出版 2021/04
  • 川那部, 浩哉; 西野, 麻知子; 前畑, 政善; 桝永, 一宏; Grygier, Mark Josef; Smith, Robin James; 高橋, 啓一 (Contributor)Springer 2020 9783030169688 xviii, 932 p., [16] p. of plates
  • 琵琶湖ハンドブック三訂版
    内藤正明監修 (Contributorヨシ)滋賀県 2018/03
  • 西野, 麻知子; 秋山, 道雄; 中島, 拓男 (Contributor)サンライズ出版 2017/10 9784883256242 248p
  • 滋賀県で大切にすべき野生生物: 滋賀県レッドデータブック2015年版
    滋賀県生きもの総合調査委員会編 (Contributorp.80, p.88, p.91, p.107, p.112, p.116, p.120, p.133, p.138, p.144, p.147, p.149, p.155, p.157, p.167, p.175, pp.177-178, p.200, p.202, p.208, pp.212-213, pp.220-221, p.223, p.226, p.230, pp.234-235, p.243, pp.247-250, p.252, p.261, p.270, p.273, pp.277-278, p.284, p.289)サンライズ出版 2016/04
  • Lake Biwa Guidebook
    Yuko Kaneko (ContributorExtant plants on the lakeshore and in the catchment area of Lake Biwa)Shiga prefectural government 2014
  • 琵琶湖ハンドブック改訂版
    内藤正明監修 (Contributorヨシ)2012
  • Kawanabe, Hiroya; Nishino, Machiko; Maehata, Masayoshi (Contributor)Springer 2012 9789400717824 xvii, 744 p., [12] leaves of plates
  • 滋賀県琵琶湖環境科学研究センター「湖岸生態系の保全・修復および管理に関する政策課題研究」担当; 滋賀県琵琶湖環境科学研究センター; 金子, 有子; 東, 善広; 石川, 可奈子; 井上, 栄壮; 西野, 麻知子 (Editor)滋賀県琵琶湖環境科学研究センター 2011/03 47p
  • 滋賀県で大切にすべき野生生物: 滋賀県レッドデータブック2010年版
    滋賀県生きもの総合調査委員会編 (Contributorp.115、p.117、p.181、p.185、p.200、p.237、p.239、p.258、p.259)2011
  • 琵琶湖湖辺域の貴重植物と外来植物
    金子有子 (Editor)2010
  • 西野, 麻知子 (Contributor)サンライズ出版 2009/05 9784883253524 286p, 図版viiip
  • 日本樹木誌 一
    日本樹木誌編集委員会編 (Contributorp.353-386)2009
  • びわ湖検定公式問題解説集
    びわ湖検定実行委員会編 (Contributor)2008
  • 琵琶湖ハンドブック
    内藤正明監修 (Contributorp.74-75)2007
  • 西野, 麻知子; 浜端, 悦治 (Contributor)サンライズ出版 2005/12 4883252698 253p, 図版8p
  • 渓畔林研究会 (Joint editor)日本林業調査会 2001/12 4889651276 213p
  • 渓畔林研究会 (Joint editor)日本林業調査会 1997/04 4889650873 218p
  • 森の木の100不思議
    日本林業技術協会編 (Contributorp.54-55)1996

Conference Activities & Talks

MISC

Research Grants & Projects

  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
    Date (from‐to) : 2015/04 -2018/03 
    Author : TAKADA Takenori
     
    We conducted the comparative study among many biological species using a big database named COMPADRE Plant Matrix Database on plants. We obtained 4000 population projection matrices on plants. Based on the 4000 matrices, we conducted several analyses on population statistics, such as population growth rate, elasticity matrix, life table response experiment (LTRE) and flow matrix. The topics are (i) the relationship between population growth rate and elasticities, (ii) the relationship between time since introduction in alien species and the above population statistics and (iii) an analysis on randomly generated population projection matrices. Furthermore, we obtained the population projection matrix of a tree population and analyzed the population dynamics using the matrix. We also developed two mathematical methods to present for studies of COMPADRE Plant Matrix Database.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2013 -2015 
    Author : Kaneko Yuko; AZUMA YOSHIHIRO; TAKADA TAKENORI; NAKAGAWA MASATO
     
    We found that before the 20th century, a wide range of floodplain, which corresponds to about 10% of Lake Biwa's surface area at standard water level, had been maintained by the floods having a probability of occurring once every 5 years at least. We investigated the genetic structure of Lake Biwa and Yodo river populations, based on intraspecific variation of chromosome number. Moreover, we developed three mathematical models of clonal plants: (i) to obtain the optimal vegetative reproduction rate, (ii) to describe the propagation of pathogenic disease among clonal individuals, (iii) to calculate genetic composition with 2 loci and 4 alleles. The results of the former two models are published in international journals.
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(C))
    Date (from‐to) : 2010 -2012 
    Author : Takenori TAKADA; Masashi OHARA; Yuko KANEKO
     
    Theoretical study is conducted to evaluate the effects of variation in life history parameters on population growth rate. The effects in two riparian tree species are also evaluated, applying population matrix models. In Aesculus turbinate, key process and stage of population dynamics is identified as growth of juvenile individuals, by life table response experiment (LTRE). Furthermore, a simulation program, which is based on population matrix models and incorporated by landscape dynamics, is developed. We found in Aesculus turbinata, that the population cannot be maintained without mast behavior. On the other hand, in Pterocarya rhoifolia, it is maintained even if the frequency of masting is very low.
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2010 -2012 
    Author : Hiroya KAWANABE; Masanori MAEHATA; Masaharu YODA; Keiichi TAKAHASHI; Mark J. GRYGIER; Katsuro YAHIRO; Kazushi HAMAZAKI; Shigeo YACHI; Osamu MITAMURA; Machiko NISHINO; Syunsuke MAWATARI; Tsuneo NAKAJIMA; Yuko KANEKO; Yasufumi SATOGUCHI; Hiroki HAGA; Kayoko KAMEDA; Shinichi NAKANO; Hiroyuki TORIGOE; Tomoo NUNOTANI; Ryouhei YAMANISHI; Eiso INOUE; Shigefumi KANAO
     
    In order to establish a methodological framework and develop specific procedures for a modern comprehensive biological and ecological survey of the Lake Biwa coastline by local residents, three research groups were established within the project team: "Distribution and Ecology of Living Creatures", "Ecosystem Diversity", and "Ways to Conduct and Cooperate with Citizen-based Surveys". Relevant literature was gathered and reviewed and pilot programs were conducted. As a result, problematic issues that may arise before, during, or after resident-based participatory surveys were clarified, and remedies were proposed. Furthermore, in order to advance the study, two public lecture programs were held and some results were used in exhibits at the Lake Biwa Museum.
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2009 -2012 
    Author : Yuko KANEKO; 練 春蘭; Takenori TAKADA; Hiroaki SETOGUCHI
     
    We investigated the genetic structure of Lake Biwa populations of (i) Lathyrus japonicus, (ii)Vitex rotundifolia, (iii) Euphorbia adenochlora and (iV) Carex vesicaria in Japan, using newly developed microsatellite loci and chloroplast DNA haplotypes. The genetic diversity was significantly lower in the inland (Lake Biwa) populations than coastal ones in the two beach species (i and ii). In addition, STRUCTURE and phylogenetic analyses supported robust genetic differentiation between the inland-coastal populations. Thus, Lake Biwa’s populations might have experienced a founder effect during the initial migration to Lake Biwa and genetic drift during inland isolation. The genetic diversity of the Lake Biwa populations of the two floodplain plants (iii and iv) was also low, showing that numbers of genets were smaller than that of ramets. We collected 425 papers of 12 Red list species, which we focused on this project, to obtain the information on their life history and reproductive property. Furthermore, we developed a computer simulation program in which fecundity strongly depends on genetic structure of the population. It enables us to quantify the relationship between the population genetic structure and extinction probability due to inbreeding depression.
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2007 -2010 
    Author : Naoko TOKUCHI; Yuko KANEKO; Nobuhito OHTE; Lina KOYAMA; Takuo HISHI; Muneto HIROBE; Satoru HOBARA; Ryunsuke TATENO; Keitaro FUKUSHIMA
     
    We Studied N dynamics using ^<15>N dilution method. Immobilization rates were always larger than mineralization and nitrification rates throughout the year and stand age. The relationship between N transformation rates and soil properties ; dissolved organic carbon concentration and soil microbial biomass etc., differed among the seasons. Based on the ^<18>O of NO_3^- of soil solution and the simulation of N immobilization, immobilization of NO_3^- in soil solution needed a few weeks. These results show that abiotic immobilization is one of the important mechanisms for soil N retention in the forest ecosystem.
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(C))
    Date (from‐to) : 2007 -2008 
    Author : Takenori TAKADA; Masashi OHARA; Yuko KANEKO
     
    本研究で対象としている生活史の異なる木本種2種(トチノキ, サワグルミ)、林床植物3種(エンレイソウ、オオバナノエンレイソウ、オオウバユリ、スズラン)について、その生物集団の動態の解析を行った。生存率、成長率、繁殖率の撹乱などによる時間空間的変動が集団の増加率に与える影響を評価する従来の方法について検討が加えられ、近年発展した生命表反応実験(LTRE)という手法を用いる解析をおこなった。また、その結果をもとに絶滅確率を求める新たな手法を開発した。
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(C))
    Date (from‐to) : 2006 -2008 
    Author : Hideyuki KAWAGUCHI; Yuji ISAGI; Satoshi NANAMI; Yuko KANRKO; Ryunosuke TATENO; Yu MATSUKI; Reiko KODA; Yukikazu SAKURAZAWA
     
    トチノキ果実の種子数の変動とその至近要因と究極要因を検討した。資源の多少、花粉親の遺伝子型、花粉の制限は至近要因でないことが示された。自殖を含めて花粉親が異なる胚珠の共存と成熟が観察された。果実内の複数の種子は重さを小さくすることなく、同様の重さに成熟した。複数の種子が成熟すると種子に対する果皮のコストは低くなったが、虫害率は高くなった。落下後の散布距離に種子の形態の違いは影響しないが種子重は影響した。
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(A))
    Date (from‐to) : 2004 -2007 
    Author : Etsuji HAMABATA; 神谷 要; Machiko NISHINO; Yuko KANEKO; Motokazu ANDO; Tohru YABE
     
    Submerged macrophyte communities were surveyed in the lakes and swamps in northern central and eastern Asia. And, in some of the lakes and swamps, the fluctuation of water temperatures in a day was measured. As the results, it is estimated that the water temperatures of small lakes flowed from springs and of large lake were too low for macrophyte growing.In the study area of East Asia, four ITS types of Ceratophyllum demersum were identified. For Stuckenia pectinata, five haplotypes were found from the cpDNA variation of trn L intron and psbA-trnH. Distributional patterns of genotypes in these two species showed that genetic closeness between Japanese and Chinese lakes. The same haplotypes were found in the flyway wetlands both of Japan and Mainland.Gene analysis of Elodea nutallii native to North America was applied to assess the genetic variation and then we confirmed some genetic variation. There were no relationships between the geographic distribution and the genetic variation. The genetic analysis supported the hypothesis that genetically diverse population were spread to all over Japan after initial some immigrations to Lake Biwa. There was a special reason for the invasion and establishment to various flyway-wetland to the high environmental adaptability.In order to investigate the role of the waterfowl in a flyway, the droppings by a waterfowl was collected in various places, and I checked that many seeds were contained in the droppings of a waterfowl. I experimented by the droppings of the waterfowl having begun to scatter from this, and checked that there was a sprout from excrement. Furthermore, the experiment about time was conducted on stay of the duck of a seed in the 'living creature.For getting information on the possibilities of physical contacts between migratory waterfowl and resident terrestrial mammals, authors conducted sensor-camera survey at wetlands along East Asian flyways in Mongolia, China, Korea and Japan. As a result, small mammals and livestock were abundant at continental prairie environment, while medium size mammals were dominant at vegetated environment in Korea and Japan. Invasions of alien species were noticeable at some wetlands.Aquatic benthic fauna was surveyed wetlands in Mongol, Korea and Japan. The same species of small invertebrates like chironomids inhabit both in Lake Biwa and Lake Mongol, located more than 3000 km a part under different climatic conditions. This suggests that several aquatic small invertebrates were transported by migration of waterfowls.
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(C))
    Date (from‐to) : 2005 -2006 
    Author : Yuko KANEKO; Naoko TOKUCHI; Takenori TAKADA
     
    1.Forest disturbance has great influences on the nutrient cycling due to the interruption of plant uptake, which is one of the most important pathways for nutrients. The influence of the disturbance on nitrogen cycling is especially evident because the recycling, decomposition and uptake between plants and soil are the largest pathways of nitrogen. The excess nitrogen caused by the interrupted plant uptake is nitrified by soil microbes and is leached out of the forest ecosystem to the downstream. The influence of long-term forest disturbance on each process of nutrient cycling was estimated by applying PnET-CN model. To apply PnET-CN to topographically heterogeneous Japanese forest ecosystems, it is necessary to develop a hydrological model that can incorporate the heterogeneity. It is necessary to build long-term monitoring systems to provide basic database for the model construction in Japan.2.Demographic perturbation analysis is used in two logically distinct ways: prospective analyses and retrospective analyses. As the results of the elasticity analysis, the maintenance of individuals at the pre-reproductive and reproductive stages would have the largest effect on the population growth rate ( A ) and is the most important factor for population maintenance. A retrospective analysis, by contrast, is concerned with precisely this variation, and how it contributes to actual variation in A. The results of LTRE analysis indicate that evaluating long-term growing process of juveniles and reproductive phase are important and necessary not only for understanding population maintenance mechanism and the life-history strategy but also for conservation of canopy tree species.
  • 文部科学省：科学研究費補助金(若手研究(B))
    Date (from‐to) : 2002 -2004 
    Author : 金子 有子
     
    トチノキとサワグルミを対象に,平成16年度は以下の研究を行った。(1)野外天然集団の生態調査京大芦生研究林モンドリ谷の固定調査地(2.8ha)において,前年度までに遺伝試料を採取した個体の位置測量を行った。位置情報から、遺伝解析の際に必要な個体間距離等を算出した。(2)野外天然集団の遺伝分析前年度までに京都大学芦生演習林モンドリ谷の固定調査地から採取したすべてのトチノキ・サワグルミサンプルからDNAを抽出し,マイクロサテライトマーカーを用いてマイクロサテライト遺伝子座における遺伝子型を決定した。(3)データ解析および数理解析各遺伝子座で対立遺伝子頻度,ヘテロ接合度等を求め,メタ個体群レベルで父性排除分析を行った。成熟個体の遺伝子型との比較から,種子や未成熟個体の親個体を推定し,局所的地域個体群間での遺伝子交換の程度を把握した。また、種子散布以降の実生定着・成長過程における遺伝子型ごとのフローを明らかにし,遺伝子レベルの動態パラメータを定量的に求め、推移行列モデルを構築した。トチノキについては、種子散布がメタ個体群内に制限されているのに対し、花粉散布によってメタ個体群間での長距離の遺伝交流が実現していることが明らかになった。また、実生から稚樹へと生育段階が進むにつれて個体間の血縁度が低下する傾向が見られた。これらの解析から、個体数の観点からは相対的重要性の低いサブ個体群であっても遺伝的なソースとしては重要であることが示唆された。
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(A))
    Date (from‐to) : 2002 -2004 
    Author : Yuji ISAGI; Hideyuki KAWAGUCHI; Takakazu YUMOTO; Yuko KANEKO; 崎尾 均; Hitoshi SAKIO
     
    In this research project we analyzed pollination processes of tree species with various regeneration characteristics with the aid of microsatellite markers that had been developed for tree species with various pollination system and seed dispersal characteristics such as Aesculus turbinata (insect pollination and seed dispersal by the gravity and mammals), Magnolia obovata (insect pollination and avian seed dispersal), Rhododendron metternichii var.hondoense (insect pollination and seed dispersal by wind), Quercus myrsinifolia (wind pollination and seed dispersal by the gravity and mammals), Dipterocarpus tempehens (insect pollination and seed dispersal by wind). In addition to these markers, we newly developed for Kalopanax pictus (wind pollination and avian seed dispersal) and Cercidiphyllum japonicum (wind pollination and seed dispersal by wind) in the present study and evaluated the polymorphism in long term large scale research sites. Long term and large scale research sites were maintained and genotyping was made for every reproductive individuals. For the research of Magnolia obovata, Kalopanax pictus, Aesculus turbinata, the area of research site was extended as large as several hundred ha, and facility to reach the crown of tree was developed. Analyses with microsatellite markers revealed many interesting characteristics of tree pollination, such as idiosyncratic pollination to individual trees and flowers of Magnolia obovata, effect of genetic structure to pollen dispersal distances of Aesculus turbinate, and very long distance pollen movement found in Dipterocarpus tempehens in the tropical rain forests.

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