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Yuuko Kaneko

Faculty
Department of English and American Literature
International Research Center for Philosophy
PositionAssociate Professor
Mail
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Birthday
Last Updated :2019/05/16

Research Activities

Research Areas

  • Biological Science, Molecular biology
  • Basic biology, Biodiversity/Systematics
  • Environmental science, Environmental dynamic analysis
  • Conservation of biological resources, Conservation of biological resources
  • Environmental science, Environmental and ecological symbiosis
  • Basic biology, Ecology/Environment
  • Forest and forest products science, Forest science

Research Interests

    LTRE, GIS, PnET

Published Papers

  • Range expansion and lineage admixture of the Japanese evergreen tree Machilus thunbergii in central Japan., Watanabe S, Kaneko Y, Maesako Y, Noma N, Journal of plant research, 127, (6) 709 - 720, 11 , Refereed
  • Genetic variation and gene flow in Vallisneria asiatica var. biwaensis (Hydrocharitaceae), an endemic submerged macrophyte, in South basin of Lake Biwa, Nakagawa Masato, Kaneko Yuko, Nishino Machiko, Japanese journal of conservation ecology, Japanese journal of conservation ecology, 19, (1) 3 - 14, 05 , Refereed
  • Development of microsatellite markers for Vitex rotundifolia (Verbenaceae), an endangered coastal plant in Lake Biwa, Japan., Ohtsuki T, Shoda T, Kaneko Y, Setoguchi H, Applications in plant sciences, 2, (4) , 04 , Refereed
  • Necessity of biodiversity conservation of the Persea thunbergii forest in the Inukami river basin, Shiga Prefecture., Maesako Yuri, Noma Naohiko, Kaneko Yuko, Yokogawa Masashi, Watanabe Syuntarou, Azuma Yoshihiro, bulletin of Kansai Organization for Nature Conservation, 地域自然史と保全 : bulletin of Kansai Organization for Nature Conservation, 34, (2) 165 - 179, 12
  • Development of microsatellites in Machilus thunbergii (Lauraceae), a warm-temperate coastal tree species in Japan., Kaneko Y, Lian C, Watanabe S, Shimatani K, Sakio H, Noma N, American journal of botany, 99, (7) e265 - 7, 07 , Refereed
  • A note on the logging of Japanese horse chestnut (Aesculus turbinata Blume) at the forested headwater catchment of Ado River., Kaneko Yuko, bulletin of Kansai Organization for Nature Conservation, 地域自然史と保全 : bulletin of Kansai Organization for Nature Conservation, 34, (1) 53 - 63, 06
  • 面源負荷とその削減対策に関する政策課題研究―面源負荷量の定量的把握と今後の面源負荷対策の方向性の検討―, OKUBO TAKUYA, AZUMA YOSHIHIRO, SATO YUICHI, TSUJIMURA SHIGEO, KANEKO YUKO, MORITA TAKASHI, OSAKI SHINSUKE, 滋賀県琵琶湖環境科学研究センター研究報告書, (7) , 03
  • 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―湖岸地形と生物からみた琵琶湖岸の現状と変遷および保全の方向性―, KANEKO YUKO, AZUMA YOSHIHIRO, SASAKI YASUSHI, TATSUMI MASARU, HASHIMOTO HIROSHI, SUGAWA HISASHI, ISHIKAWA KANAKO, HAGA HIROKI, INOUE EISO, NISHINO MACHIKO, 滋賀県琵琶湖環境科学研究センター研究報告書, (7) , 03
  • Isolation and characterization of microsatellite loci in the beach pea, Lathyrus japonicus (Fabaceae), in Japan., Ohtsuki T, Kaneko Y, Mitsui Y, Setoguchi H, American journal of botany, 98, (12) e375 - 7, 12 , Refereed
  • Phylogeography of Japanese horse chestnut (Aesculus turbinata) in the Japanese Archipelago based on chloroplast DNA haplotypes., Sugahara K, Kaneko Y, Ito S, Yamanaka K, Sakio H, Hoshizaki K, Suzuki W, Yamanaka N, Setoguchi H, Journal of plant research, 124, (1) 75 - 83, 01 , Refereed
  • Control of nitrogen release in the rivers from forest management, 徳地 直子, 金子 有子, 福島 慶太郎, Water science, 水利科学, 55, (4) 23 - 36, Refereed
  • Isolated history of the coastal plant Lathyrus japonicus (Leguminosae) in Lake Biwa, an ancient freshwater lake., Ohtsuki T, Kaneko Y, Setoguchi H, AoB plants, 2011, Refereed
  • 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(平成19~22年度(2007~2010年度)):中間報告 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―平成19~20年度(2007~2008年度)中間報告―, KANEKO YUKO, AZUMA YOSHIHIRO, TATSUMI MASARU, SASAKI YASUSHI, KURIBAYASHI MINORU, ISHIWATA SHIN'ICHI, INOUE EISO, KOBAYASHI SADA, ISHIKAWA KANAKO, HAGA HIROKI, NISHINO MACHIKO, 滋賀県琵琶湖環境科学研究センター研究報告書, (5) , 01
  • Present Distribution and Regional Vegetation of the Persea thunbergii Population in Western River Basins of Lake Biwa, Shiga Prefecture, Central Japan, MAESAKO Yuri, FUJIWAKI Takahiro, KANEKO Yuko, Osaka Sangyo University journal of human environmental studies, 大阪産業大学人間環境論集, 8, 39 - 55, 06 , Refereed
  • Invasion and present status of Gymnocoronis spilanthoides (Compositae) in Lake Biwa and some notes on its eradication, 藤井 伸二, 志賀 隆, 金子 有子, Bulletin of Water Plant Society, Japan, 水草研究会誌, (89) 9 - 21, 03
  • 10.環境負荷の軽減を図るための森林管理方法の検討 森林流出水および森林動態の長期モニタリング, KANEKO YUKO, KUNIMATSU TAKAO, KAGOTANI YASUYUKI, NAKAJIMA TAKUO, 滋賀県琵琶湖・環境科学研究センター試験研究報告, (3) 101 - 109, 03
  • 15.流域の地域特性に基づく生物多様性保全手法の構築 流域の地域特性に基づく生物多様性保全手法の構築―平成18年度の成果―, NISHINO MACHIKO, HOSOYA KAZUMI, FUJITA TOMOHIKO, ONO TOMOKO, MAENAKA HISAYUKI, FUJII SHINJI, KANEKO YUKO, MAESAKO YURI, KAMIYA KANAME, 滋賀県琵琶湖・環境科学研究センター試験研究報告, (3) 134 - 178, 03
  • 環境負荷の軽減を図るための森林管理方法の検討 環境負荷の軽減方法を探るための実験から, KANEKO YUKO, KAGOTANI YASUYUKI, TOKUCHI NAOKO, SOKA SHINGO, 滋賀県琵琶湖・環境科学研究センター試験研究報告, (2) , 03 28
  • 流域の地域特性に基づいた生物多様性保全手法の構築 生物多様性に配慮した流域管理手法の構築, NISHINO MACHIKO, HOSOYA KAZUMI, FUJITA TOMOHIKO, SUZUKI TAKASHI, ONO TOMOKO, MAENAKA HISAYUKI, HAMAHATA ETSUJI, FUJII SHINJI, KAMIYA KANAME, KANEKO YUKO, KANEKO SHINGO, ISAGI YUJI, 滋賀県琵琶湖・環境科学研究センター試験研究報告, (2) , 03 28
  • 内湖の生物多様性維持機構の解明 貴重植物,ヨシおよび在来魚からみた内湖の生物多様性, NISHINO MACHIKO, HAMAHASHI ETSUJI, KANEKO YUKO, FUKUDA DAISUKE, HOSOTANI KAZUMI, ISAGI YUJI, 滋賀県琵琶湖・環境科学研究センター試験研究報告, 2004, 03 27
  • Demography and matrix analysis on a natural Pterocarya rhoifolia population developed along a mountain stream., Kaneko Y, Kawano S, Journal of plant research, 115, (5) 341 - 354, 10 , Refereed
  • 森林伐採と栄養塩類の挙動と流出, KUNIMATSU TAKAO, HIDA YOSHIFUMI, KANEKO YUKO, HAMABATA ETSUJI, 滋賀県琵琶湖研究所所報, (19) 50 - 53, 01 31
  • 森林伐採と温暖化ガスの挙動 (滋賀県琵琶湖研究所S), KAGOTANI YASUYUKI, KANEKO YUKO, NAKAJIMA TAKUO, HIGUCHI TAKASHI, HAMABATA ETSUJI, 森林伐採が環境に及ぼす影響予稿集 第18回琵琶湖研究シンポジウム プロジェクト研究成果報告 平成12年, 47 - 58
  • Dynamics of riparian forest. Disturbance regimes of a mountainous riparian forest and effects of disturbance on tree population dynamics., KANEKO YUKO, 日本生態学会誌, 45, (3) 311 - 316, 12

Misc

  • 渓畔林に生きるトチノキとサワグルミの生活史戦略, KANEKO YUKO, 種生物学研究,   2005 03 27

Conference Activities & Talks

  • 開花フェノロジーと性型比がタブノキの結実成功に与える影響, WATANABE SHUNTARO, KANEKO YUKO, NOMA NAOHIKO, NISHIDA TAKAYOSHI, 日本森林学会大会学術講演集(CD-ROM),   2014 03 26
  • 異型異熟性はタブノキの繁殖成功を左右するのか?, WATANABE SHUNTARO, KANEKO YUKO, NOMA NAOHIKO, NISHIDA TAKAYOSHI, 日本生態学会大会講演要旨集,   2013 03 05
  • 河川氾濫原環境における樹木集団の動態シミュレーション, TAKADA TAKENORI, KANEKO YUKO, 日本生態学会大会講演要旨集,   2013 03 05
  • 過去の草原利用が現在の森林生態系の物質循環に与える影響:PnETモデルを用いた長期影響評価から, FUKUSHIMA KEITARO, KANEKO YUKO, TOKUCHI NAOKO, KAGOTANI YASUYUKI, HAMABATA ETSUJI, OSAKA KEN'ICHI, KUNIMATSU TAKAO, 日本陸水学会大会講演要旨集,   2012 09 14
  • 地史的要因が左右する近畿地方のタブノキ林の遺伝構造, WATANABE SHUNTARO, KANEKO YUKO, MAESAKO YURI, NOMA NAOHIKO, 日本森林学会大会学術講演集(CD-ROM),   2012 03 26
  • 琵琶湖に陸封された海浜植物の系統地理と保護施策, SETOGUCHI HIROAKI, OTSUKI TATSURO, NODA ASUKA, SHODA TASUKU, KANEKO YUKO, 植物地理・分類学会大会プログラム・講演要旨,   2012
  • 森林サイズがタブノキ林の遺伝構造に与える影響, WATANABE SHUNTARO, KANEKO YUKO, MAESAKO YURI, NOMA NAOHIKO, 日本生態学会大会講演要旨集,   2011 03 08
  • 海岸と琵琶湖岸に生育するハマエンドウの遺伝的多様性解析, OTSUKI TATSURO, KANEKO YUKO, SETOGUCHI HIROAKI, 日本植物学会大会研究発表記録,   2010 09 08
  • 森林河川の硝酸態窒素濃度に対するナラ枯れの影響の検討, OKUBO TAKUYA, AZUMA YOSHIHIRO, KANEKO YUKO, 日本陸水学会大会講演要旨集,   2010 09 07
  • 琵琶湖における特定外来生物指定植物種の防除をめぐって, KANEKO YUKO, KURIBAYASHI MINORU, FUJII SHINJI, NOMA NAOHIKO, NAKAI KATSUKI, 日本生態学会大会講演要旨集,   2010 03 15
  • 近畿地方内陸部タブノキ林の保全生態学的研究:地理変異と繁殖特性, WATANABE SHUNTARO, KANEKO YUKO, MAESAKO YURI, NOMA NAOHIKO, 日本生態学会大会講演要旨集,   2010 03 15
  • Structure and 13-year dynamics of a deciduous broad-leaf secondary forest in northwest Shiga., Kagotani Yasuyuki, Takeda Machiko, Kawasaki Akihiro, Kishimoto Yasunori, Hamabata Etsuji, Kaneko Yuko, The Japanese Forest Society Congress,   2010
  • Genetic structure and vegetation analysis of Machilus thunbergii populations in the Lake Biwa Basin, Kaneko Yuko, Maesako Yuri, Watanabe Shuntaro, Noma Naohiko, The Japanese Forest Society Congress,   2010
  • 日本列島におけるトチノキの系統地理, SUGAWARA KANAKO, KANEKO YUKO, ITO SATOSHI, YAMANAKA KEISUKE, SAKIO HITOSHI, HOSHIZAKI KAZUHIKO, SUZUKI WAJIRO, YAMANAKA NORIKAZU, SETOGUCHI HIROAKI, 日本植物学会大会研究発表記録,   2009 09 17
  • 琵琶湖の生物多様性の現状評価と保全, NISHINO MACHIKO, KANEKO YUKO, AZUMA YOSHIHIRO, 日本陸水学会大会講演要旨集,   2009 09 10
  • 滋賀県の落葉広葉樹林における皆伐処理後処理が土壌の窒素動態に与える影響, TOKUCHI NAOKO, KANEKO YUKO, UEDA MIKI, KOYAMA RINA, FUKUSHIMA KEITARO, 日本森林学会大会学術講演集(CD-ROM),   2008 03 26
  • 日本産リュウノヒゲモの遺伝的多様性について, KANEKO YUKO, HAMAHATA ETSUJI, KAWASE HIROKI, KAMIYA KANAME, 日本生態学会大会講演要旨集,   2008 03 14
  • Influences on soil nitrogen dynamics by the different treatments after clear cutting in a deciduous secondary forest, tokuchi naoko, kaneko yuko, ueda miki, koyama lina, fukushima keitaro, The Japanese Forest Society Congress,   2008
  • カワウ生息地における植生景観の変遷, MAESAKO YURI, KANEKO YUKO, 植生学会大会講演要旨集,   2007 10 07
  • Acacia mangiumの幹および地上部現存量の共通アロメトリー式による推定, KANEKO TAKAYUKI, OTA SEIICHI, OKIMORI YASUYUKI, KANZAKI MAMORU, KANEKO YUKO, ARISMAN HARDJONO, 日本森林学会大会学術講演集(CD-ROM),   2007 04 01
  • 「下流域への栄養塩負荷を最小限にする森林伐採管理方法の探究」, SOKA SHINGO, KANEKO YUKO, TOKUCHI NAOKO, KAGOTANI YASUYUKI, HAMAHATA YOSHIHARU, 日本生態学会大会講演要旨集,   2007 03 19
  • 山地小流域におけるトチノキの開花と結実の変動パターン, KAWAGUCHI HIDEYUKI, NAKAMA KIMIYO, MIZOUCHI MASAHIRO, TATENO RYUNOSUKE, NANAMI SATOSHI, ISAGI YUJI, KANEKO YUKO, 日本生態学会大会講演要旨集,   2005 03 27
  • 琵琶湖の本湖および内湖におけるヨシのマイクロサテライトマーカーによる遺伝構造の解析, KANEKO YUKO, SHIMIZU YOSHIKUNI, IWASHI YUJI, 日本生態学会大会講演要旨集,   2005 03 27
  • 芦生モンドリ谷集水域天然林16haの10年間の動態‐スギが混交する冷温帯下部天然林の地形による変化‐, ANDO SHIN, KANEKO TAKAYUKI, YAMAZAKI TOSHIMASA, TAKAYANAGI ATSUSHI, YAMANAKA NORIKAZU, HASEGAWA NAOFUMI, SAKAI TETSURO, KANEKO YUKO, OHATA SEIICHI, 日本林学会大会学術講演集,   2004 03 20
  • 芦生モンドリ谷調査区における渓畔域の撹乱と樹木動態, KANEKO YUKO, TAKADA MASANORI, KANEKO TAKAYUKI, 日本林学会大会学術講演集,   2004 03 20
  • 渓流に沿ったトチノキ個体間の遺伝的類似度, KAWAGUCHI HIDEYUKI, ISAGI YUJI, KANEKO YUKO, TATENO RYUNOSUKE, 日本生態学会大会講演要旨集,   2002 03 25
  • トチノキの種子散布と実生の生残, TATENO RYUNOSUKE, IMAIZUMI TOMOYUKI, KAWAGUCHI HIDEYUKI, KANEKO YUKO, 日本生態学会大会講演要旨集,   2002 03 25
  • 植栽後の森林施業過程における土壌呼吸速度の変化について, KANEKO YUKO, HAMABATA ETSUJI, 日本林学会大会学術講演集,   2002 03 20
  • トチノキ繁殖個体における3年間の純生産の配分, KAWAGUCHI HIDEYUKI, TOYODA AYU, TATENO RYUNOSUKE, HIROBE TAKASHI, NANAMI SATOSHI, ISAGI YUJI, KANEKO YUKO, 日本生態学会大会講演要旨集,   2001 03 22
  • 土壌呼吸速度に対する森林伐採実験の影響について, KANEKO YUKO, HAMAHATA ETSUJI, 日本林学会大会学術講演集,   2001 03 20
  • 日本産渓畔林要素トキノキとサワグルミの個体群動態とマトリックス解析, KANEKO YUKO, 日本植物学会大会研究発表記録,   2000 09 27
  • トチノキ個体への送粉による遺伝子流を制限する要因, KODA JUN, ISAGI YUJI, KAWAGUCHI HIDEYUKI, ENOKI TSUTOMU, ARAKI MASATAKE, HIDA HIROYORI, KANEKO YUKO, 日本生態学会大会講演要旨集,   2000 03 21
  • トチノキ繁殖個体のアロケーション, KAWAGUCHI HIDEYUKI, ARAKI MASATAKE, ENOKI TSUTOMU, ISAGI YUJI, KANEKO YUKO, 日本生態学会大会講演要旨集,   1999 03 22
  • トチノキ野生個体群における種子の花粉親の推定 マイクロサテライトマーカーを用いたDNA解析から, MINAMI ETSU, ISAGI YUJI, KAWAGUCHI HIDEYUKI, KANEKO YUKO, 日本生態学会大会講演要旨集,   1998 03
  • トチノキ集団のメタポピュレーション構造とマトリックスモデルによる動態の解析, KANEKO YUKO, 日本生態学会大会講演要旨集,   1998 03
  • Development of micro satellite marker of horse chestnut (Aesculus turbinata) and polymorphism in the wild population., MINAMI ETSU, ISAGI HIROSHI, KANEKO YUKO, KAWAGUCHI HIDEYUKI, 日本生態学会大会講演要旨集,   1997 03
  • Studies on Pollutant Loadings from Non-point Sources. (18). Effect of clear-cutting on water qualities of broadleaved forest., KUNIMATSU TAKAO, SUDO MIKI, HAMAHATA ETSUHARU, KANEKO YUKO, SHIMADA KAZUHIKO, 環境科学会年会一般講演・シンポジウム・プログラム,   1997
  • Effect of disturbance system in cool temperate zone mountain stream area on stream area forest., KANEKO YUKO, 日本生態学会大会講演要旨集,   1995 08

Research Grants & Projects

  • Establishment of a methodological framework and specific procedures for a comprehensive survey, "Hustle and Bustle of Life", of the Lake Biwa coastline by local residents, Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(B)), Hiroya KAWANABE, 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.
  • A MATHEMATICAL ANALYSIS ON EFFECT OF REPRODUCTIVE SCHEDULE PATTERN ON EXTINCTION PROBABILITY OF PERENNIAL PLANTS, Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(C)), Takenori TAKADA, 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.
  • Estimates of the biodiversity based on the ubiquitous monitoring / genotyping of the rare plants around the lakeshore of Lake Biwa., Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(B)), Yuko KANEKO, 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.
  • N saturation mechanism along the forest aging and influence simulation by PnET-CN, Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(B)), Naoko TOKUCHI, 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.
  • Meta-population dynamics of plants under fluctuating environment-A mathematical analysis on the relationship between disturbance intensity and extinction probability.-, Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(C)), Takenori TAKADA
  • Factors affecting seed set in Aesculus turbinata, Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(C)), Hideyuki KAWAGUCHI
  • Distribution and genetic biodiversity of aquatic fauna and flora along east Asian flyway wetlands, Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(A)), Etsuji HAMABATA, 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.
  • The influence of forest disturbance on stream chemistry and biodiversity, Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(C)), Yuko KANEKO, 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.
  • Analyses on the pollination system of tree species with various regeneration characteristics, Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(A)), Yuji ISAGI, 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.