九州大学数理生物学研究室

2015.1.23

Symposium "Ecosystem Management and Environmental Decisions”

日 時: 2015年1月30日(金)10時00分~15時30分
場 所: 九州大学医学部 百年講堂 (馬出キャンパス) 2階会議室
参加費: 無料(参加申し込みは不要です)
使用言語: 英語

【企画趣旨】

In this symposium, diverse aspects of ecosystem management and environmental decisions will be discussed. First, Professor Hugh Possingham will give his key note lecture, followed by a series of talks by Australian scientists and those researchers from Kyushu University. Talks will cover modeling of conservation biology, computational models including physiological processes, games for corruption and punishment related to deforestation, marine protected areas, and social sciences for ecosystem management. Speakers includes ecologists, economists, physicists and mathematicians. Themes includes computational and mathematical modeling of ecological and social processes, the problems of environmental policy choice under considerable risk and uncertainty, and social consensus building, the efficiency of institution among many others. The session will be in an intimate atmosphere in a rather small room. It will be open to public, and any person interested in the topics can come and join the discussion. Below is a tentative schedule.

Organizer: Yoh Iwasa

yohiwasa[at]kyudai.jp
※[at]の部分を@に置き換えてください。

【スケジュール】

10:00 Opening
10:00-10:40 Hugh Possingham
"Optimal conservation outcomes require both restoration and protection."
10:50-11:10 Yoh Iwasa
"Modeling social sciences for ecosystem management."
11:20-1:40 Dan P. Faith
"Decision science for sustainability: maintaining resilient frontier curves."
11:50-12:10 Marko Jusup
"From physiological energetics to fishery management: the case of Pacific bluefin tuna."
12:10-13:30 Lunch break
13:30-13:50 Joung-Hun Lee
"Deforestation and Corruption: modeling of evolutionary game theory."
14:00-14:20 Alienor Chauvenet
"Using a modeling ensemble to plan species translocations under climate change."
14:30-14:50 Nao Takashina
"Determining the appropriate management unit scale in spatial fishery planning."
15:00-15:20 Hsien-Yung Lin
"Conserving migratory fish under multiple disturbances."
15:30 Closing

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メンバー紹介

巌佐 庸(いわさ よう)

巌佐 庸(いわさ よう)
所属:九州大学理学研究院生物科学部門数理生物学教室、九州大学高等研究院長
ウェブサイト
役職:教授
所属学会:日本数理生物学会、日本進化学会、日本生態学会、個体群生態学会、日本動物行動学会、日本分子生物学会、Ecological Society of America、International Society of Behavioral Ecology、Society for Mathematical Biology

岩見 真吾(いわみ しんご)

岩見 真吾(いわみ しんご)
所属:九州大学理学研究院生物科学部門数理生物学教室、科学技術振興機構さきがけ(兼任)
役職:准教授
所属学会:日本エイズ学会、日本ウイルス学会、日本生態学会、日本数理生物学会、日本応用数理学会、日本数学会

波江野 洋(はえの ひろし)

波江野 洋(はえの ひろし)
所属:九州大学理学研究院生物科学部門数理生物学研究室
ウェブサイト
役職:助教
所属学会:日本数理生物学会、American Association for Cancer Research

セミナー情報

MEセミナー

MEセミナーとは九州大学数理生物学研究室で1966年から続くインフォーマルセミナーです。
基本的には、数理生物学研究室のメンバーが自分の研究についてプレゼンテーションをすることが多いのですが、研究室外から訪問して頂いた研究者の方にお話をして頂くことも多くあります。

MEセミナーでは、研究室外の方にお話をして頂ける機会を歓迎いたします。もしMEセミナーでのお話をご希望なされる方がいらっしゃいましたら、お気軽にセミナー係までお問い合わせください。

過去のMEセミナーの情報はこちら

セミナー係
内之宮光紀 : uchinomiya[at]bio-math10.biology.kyushu-u.ac.jp ※[at]を@に置き換えて下さい。
2015.2.12, 13:30-

Spatio-temporal pattern formation in plant communities formed by Jansen-Connell processes.
(Yuuya Tachiki : Hokkaido University, Sapporo)

     The negative density dependences due to pathogen or herbivore are considered to be important to maintain the diversity in plant communities, so called Janzen-Connell hypothesis. Especially the effect of species-specific soil fungi on the abundance and species richness has been documented. The key component of Janzen-Connell hypothesis is the distance-dependent mortality, which expects the high mortality of seedlings near the conspecifics. It is expected to lead the low recruitment near conspecifics and to prevent the over-dominance of the common species. Although the role of Janzen-Connell hypothesis on the maintenance of diversity has been extensively studied, little is known about the effect on the spatial pattern formation of plant communities. To explore the role of activity of soil pathogen on the spatial pattern of vegetation as well as the species richness, we constructed a 2-demensional spatially explicit mathematical model which described the dynamics of plant community and species-specific soil pathogen. It was assumed that each plant species had a specialist pathogen which infected on the seedlings of focal species and kill them. The growth and spread of pathogen was described as reaction-diffusion equation. As the results, as the growth rate of soil fungi increased, each individual more sparsely distributed and higher species richness was maintained. There was an optimal value of diffusion coefficient of pathogen, in which the highest species richness was realized and the most sparsely each individual distributed. The results suggest that there is the most effective mobility of pathogen to maintain the diversity in forest ecosystems.

2015.2.14, 14:00-

Theoretical morphology of gastropod shells
(Koji Noshita : Kyushu University)

     Gastropods are the largest and the most diversified taxon in the phylum Mollusca. Commonly known as snails and slugs, gastropods are able to live in remarkably diversified habitats through a wide range of adaptation over time. Their shells form an important component for their adaptation because most of them protect their body from physical, physiological, and ecological perturbations with their shells.
     In this talk, I will show two different theoretical approaches for understanding a morphological diversity of gastropod shells. First approach is an example of ultimate explanations of a morphological diversity of gastropod shells. Although shells of gastropods are important component for their adaptation, the shells can become a burden to them because they need to form and bring their shells. I assessed these constraints as efficiency of shell construction and shell balance, respectively. Biomechanical analysis showed that these two functions of shells are conflict in each other in terms of shell height and umbilical width. Most of actual specimens show moderate forms, which do not have extremely ill balanced or inefficient shells. Moreover, the biometric results suggest that land snails are more highly constrained than marine species in achieving a balance between shell balance and efficiency of shell construction.
     Second approach focuses on an aspect of proximal explanations. The shell is formed through an accretionary growth which the epidermis of the mantle secretes shell materials little by little. Most of gastropod shells coil spirally due to asymmetric growth along inner and outer lip of an aperture. I propose a method to quantify such growth pattern along an aperture from actual specimens, and a comparability of the growth pattern with experimental data.

2015.2.14, 16:00-

Accelerate plant breeding using genomic selection and related technologies
(Hiroyoshi Iwata : Grad. Sch. Agr. Life Sci., Univ. of Tokyo, JST/CREST)

     World population is expected to reach 9.7 billion by 2050. To feed the growing population, farmers must produce 70% more food by 2050; an average increase in production of 44 million metric tons per year is required. To achieve this increase in food production under limited agricultural resources, we need to substantially increase yield potential of crop plants. As a solution for the increment of yield potential of crop plants, genomic selection (GS), a technology for rapid genetic improvement of an organism, has received a lot of attention recently. In GS, the relationship between genome-wide marker genotypes (x) and phenotype (y) is modeled with the function y=f(x). Using this model, we predict the potential of individuals under selection as f(xs) based on their marker genotypes (xs) even without their phenotypic records and select individuals with desirable predicted values. Because with GS we can select individuals without evaluating their phenotypes, an unprecedented breeding system, which is unachievable with conventional selection, can be realized. For instance, even in Japan, we can develop varieties that are adaptable to hostile environments around the world using selection based on the prediction model. In another instance, we can speed-up breeding process largely using GS with a rapid generation advancement technique using an artificial environment. From these reason, theoretical researches of GS and researches for implementation of GS to breeding programs have been conducted in agricultural research institutes over the world.
     Within the context, we have conducted the following researches to implement GS to plant breeding and to accelerate and streamline breeding process: (1) Evaluation of potential of GS based on simulation (Iwata et al. 2011; Yabe et al. 2013; Yabe et al. 2014) and experimental studies (Yabe et al. in prep). (2) Development and accuracy evaluation of GS prediction models in various species (Iwata and Jannink 2011; Iwata et al. 2013a; Onogi et al. 2014; Onogi et al. in press). (3) Development of new modeling methods for GS and GWAS (Iwata et al. 2010; Hayashi and Iwata 2010; Hayashi and Iwata 2013; Iwata et al. submitted; Onogi et al. submitted). (4) Development of new breeding methods with GS models (Iwata et al. 2013b) and computer programs for GS modeling (Onogi et al. submitted; Galliot in prep). In this talk, I will introduce our current researches on genomic selection for accelerating plant breeding. I will also talk about issues of current genomic selection breeding and our challenges for solving the issues.

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九州大学理学部生物学科 数理生物学研究室
〒812-8581 福岡市東区箱崎6-10-1
tel (092) 642-2641 fax (092) 642-2645
e-mail yohiwasa[at]kyudai.jp
※[at]を@に置き換えて下さい。

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