My specialty is theoretical ecology. In theoretical ecology, we widely analyze phenomena and hypotheses related to ecology in a model using mathematical expressions ("Modeling"). Understanding the phenomenon will be dramatically enhanced in the course of analyzing while rethinking and thinking about modeling the essence of the phenomenon that you want to understand as one model. The deeper understanding through modeling leads to new ideas and working hypotheses of experiments and field studies, creating new theoretical issues, which is a strength and pleasure of theoretical ecology.
The research topics are (1) solving the mystery of the global ecosystem, (2) watershed management and biodiversity / ecosystem restoration research.
(1) Populations, organisms, and ecosystems composed of individual organisms create phenomena that can not be thought of at the group level by succession and evolution by interaction. Using theoretical thinking and mathematical model, we can estimate the population dynamics of organisms, such as population fluctuation of organisms, dynamics of infectious diseases, coexistence / co-evolution among different species, relationship of biodiversity and ecosystems, interaction between ecosystems and human society, we will try to solve the mysteries of various ecological phenomena occurring in the Earth's ecosystem. (2) As a common problem of contemporary ecosystem management and environmental problems, "Complex adaptive system such as watersheds, tropical forests and oceans, which various stakeholders are involved and forced to assume uncertainty from various circumstances. How can sustainable management of the system be possible? Under what conditions will management become feasible? " as another pillar of my research theme. Specifically, we are working on watershed management, project research related to biodiversity / ecosystem regeneration and related activities, and theoretical research using mathematical models.
The research theme is related to (1) the formation of the earth ecosystem (evolution and ecology), (2) conservation and regeneration of watershed-scle ecosystems(as part of global environmental issues). Along with research by mathematical model, we are pursuing interdisciplinary research on watershed management (governance) such that the Lake Biwa basin is the main field and both ecosystem regeneration and solution of region specific problems are compatible.
Overview of the research
Using theoretical thinking and mathematical models, we can challenge the mystery of various ecological phenomena occurring in the Earth's ecosystem, such as population change of organisms, dynamics of infectious diseases, coexistence / co-evolution among different species, relationships of biodiversity and ecosystems, methods of ecological regeneration, interaction between ecosystems and our societies. In theoretical ecology, we widely analyze phenomena and hypotheses related to ecology in a model using mathematical expressions ("Modeling"). Understanding of the phenomenon will be dramatically enhanced in the course of analyzing while rethinking about modeling the essence of the phenomenon that you want to understand. The deeper understanding through modeling leads to new ideas and working hypotheses of experiments and field studies, creating new theoretical issues, which is a strength and pleasure of theoretical ecology.
Research Interests
mathematical model
流域管理
ガバナンス
evolutionary biology
持続可能性
global environmental studies
生物多様性
生態系
theoretical ecology
watershed management
biodiversity
ecosystem
Research Areas
Life sciences, Evolutionary biology
Life sciences, Ecology and environmental science
Environmental science/Agricultural science, Environmental policy and society
Bioelement load to Lake Biwa by the runoff of the muddy water in the period of ploughing and irrigating the fields.- From the experimental result in paddy field. -
Integrative Observations and Assessments, 2014, Peer-reviewed
Sustaining ecosystem functions in a changing world: a call for an integrated approach
Hiroshi Tomimatsu; Takehiro Sasaki; Hiroko Kurokawa; Jon R. Bridle; Colin Fontaine; Jun Kitano; Daniel B. Stouffer; Mark Vellend; T. Martijn Bezemer; Tadashi Fukami; Elizabeth A. Hadly; Marcel G. A. van der Heijden; Masakado Kawata; Sonia Kefi; Nathan J. B. Kraft; Kevin S. McCann; Peter J. Mumby; Tohru Nakashizuka; Owen L. Petchey; Tamara N. Romanuk; Katharine N. Suding; Gaku Takimoto; Jotaro Urabe; Shigeo Yachi
JOURNAL OF APPLIED ECOLOGY, Oct. 2013, Peer-reviewed
Transdisciplinary research in watershed conservation: Experiences, lessons, and future directions
Japanese Journal of Limnology (Rikusuigaku Zasshi), 20 Aug. 2006, Peer-reviewed
Ecosystem effects of biodiversity manipulations in European grasslands
EM Spehn; A Hector; J Joshi; M Scherer-Lorenzen; B Schmid; E Bazeley-White; C Beierkuhnlein; MC Caldeira; M Diemer; PG Dimitrakopoulos; JA Finn; H Freitas; PS Giller; J Good; R Harris; P Hogberg; K Huss-Danell; A Jumpponen; J Koricheva; PW Leadley; M Loreau; A Minns; CPH Mulder; G O'Donovan; SJ Otway; C Palmborg; JS Pereira; AB Pfisterer; A Prinz; DJ Read; ED Schulze; ASD Siamantziouras; AC Terry; AY Troumbis; FI Woodward; S Yachi; JH Lawton
Multi-disciplinary research for understanding interactions between humans and nature in the Lake Biwa-Yodo River watershed : Hierarchical watershed management concept(Strategies for conservation and restoration of watershed ecosystems-Ecological tools and applications)
Yachi Shigeo
JAPANESE JOURNAL OF ECOLOGY, 2005
Strategies for conservation and restoration of watershed ecosystems : Ecological tools and applications
Nagata Toshi; Yachi Shigeo
JAPANESE JOURNAL OF ECOLOGY, 2005
Developing a Comprehensive Diagnosis Methodology for Assessing the Human and Natural Environment of a River Basin
Plant diversity and productivity experiments in European grasslands
A. Hector; B. Schmid; C. Beierkuhnlein; M. C. Caldeira; M. Diemer; P. G. Dimitrakopoulos; J. A. Finn; H. Freitas; P. S. Giller; J. Good; R. Harris; P. Högberg; K. Huss-Danell; J. Joshi; A. Jumpponen; C. Körner; P. W. Leadley; M. Loreau; A. Minns; C. P.H. Mulder; G. O'Donovan; S. J. Otway; J. S. Pereira; A. Prinz; D. J. Read; M. Scherer-Lorenzen; E. D. Schulze; A. S.D. Siamantziouras; E. M. Spehn; A. C. Terry; A. Y. Troumbis; F. I. Woodward; S. Yachi; J. H. Lawton
Science, 05 Nov. 1999, Peer-reviewed
Modeling associative learning with generalization for a case of warning signals
S Yachi; M Higashi
ECOLOGICAL RESEARCH, Sep. 1999, Peer-reviewed
Biodiversity and ecosystem productivity in a fluctuating environment: The insurance hypothesis
S Yachi; M Loreau
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Feb. 1999, Peer-reviewed
The evolution of warning signals
S Yachi; M Higashi
NATURE, Aug. 1998, Peer-reviewed
How can honest signalling evolve? The role of handicap principle
S Yachi
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, Dec. 1995, Peer-reviewed
Spatial patterns of propagating waves of fox rabies
Sustainability Science for Watershed Landscapes. Singapore: Institute of Southeast Asian Studies; Los Banos, Philippines: Southeast Asian Regional Center for Graduate Study and Research in Agriculture
Umetsu, C; Taniguchi, M; Watanabe, T; Yachi, S
Transdisciplinary Research in Watershed Conservation: Experiences, Lessons, and Future Directions, 2010
Bioelement load to Lake Biwa by the runoff of the muddy water in the period of ploughing and irrigating the fields.:- From the experimental result in paddy field. -
The methodological assessment report on scenarios and models of biodiversity and ecosystem services
H. R. Akçakaya; H. M. Pereira; G. A. Canziani; C. Mbow; A. Mori; M. G. Palomo; J. Soberón; W. Thuiller; S. Yachi, Contributor, Improving the rigour and usefulness of scenarios and models through ongoing evaluation and refinement
Secretariat of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services, Bonn, Germany, 2016, Not refereed
The Biodiversity Observation Network in Asia-Pacific Region: Integrative Observations and Assessments
YACHI Shigeo, Joint work, Long-Term and SpatialVariation in the Diversity of Littoral Benthic Macroinvertebrate Fauna in Lake Biwa, Japan
総合地球環境学研究所プロジェクト3-1「琵琶湖-淀川水系における流域管理モデルの構築」, Mar. 2006
琵琶湖・淀川・大阪湾における水質・負荷量に関する総合レポート
杉本, 隆成; 谷内, 茂雄; 国土環境株式会社
総合地球環境学研究所プロジェクト3-1 琵琶湖-淀川水系における流域管理モデルの構築, 2005
Report from the workshop, Regime shifts and thresholds in lake ecosystems by Stephen R. Carpenter (2004. 10. 27, Kyoto)
Carpenter, Stephen R.; 谷内, 茂雄
Research Institute for Humanity and Nature (RIHN), 2005
「琵琶湖‐淀川水系における流域管理モデルの構築(P3-1)」がめざすもの : 全体構想
総合地球環境学研究所琵琶湖‐淀川水系における流域管理モデルの構築; 谷内, 茂雄
総合地球環境学研究所, Jan. 2004
生態学事典
谷内茂雄, Contributor, 生態系機能と生物多様性、シグナルの進化
共立出版, 2003, Not refereed
International workshop on "Seeking an effective watershed management system through interdisciplinary approach" : considering multiple spatial scales and stakeholders
谷内, 茂雄
Research Institute for Humanity and Nature (RIHN), 2003
流域管理のための総合調査マニュアル
谷内 茂雄, Joint editor
京都大学生態学研究センター, 2002, Not refereed
New scope on sustainable watersheds in east Asia
YACHI Shigeo, Contributor, A co-dynamic model of sense of values, society and environment
Nauka-Center, Novosibirsk, 2002, Not refereed
Awards
Mar. 1999
Ecological Society of Japan, Miyaji Award
External funds: Kakenhi
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
Grant-in-Aid for Scientific Research (B)
Lake Biwa Museum
Hiroya KAWANABE
From 01 Apr. 2010, To 31 Mar. 2013, Project Closed