Conservation Biological Study Based on Multistability and Material's Circulation in Eutrophicated Lake Ecosystems

基于多稳定性和物质循环的富营养化湖泊生态系统的保护生物学研究

• 批准号: 17570016
• 负责人: AMEMIYA Takashi
• 金额: $ 2.3万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17570016/
• 关键词: Lake; Eutrophication; Stability; Conservation Ecology; Restoration of Environment; Resilience; Biomanipulation; Regime Shift; 物質循環

Population dynamics and stability in a model lake ecosystem have been studied by using a microcosm consisting of algae (M.aeruginosa), flagellate (M.guttula), and few bacteria (P.putida, and so on). The predatory effect of M.guttula on M.aeruginosa exhibited a trade-off with respect to the concentration of nutrient; The quality of food (M.aeruginosa) was increased with increasing the nutrient concentration, thus the growth rate of M.guttula was increased. However, high nutrient conditions increased the photosynthetic activity of M.aeruginosa, which increased the pH of the solution, and thus the growth rate of M.guttula was decreased. Under the conditions of intermediate nutrient conditions, M.aeruginosa was extinct or survived depending on the initial population of M.guttula, suggesting bistability in the model system.A micro-Fourier transform infrared (FTIR) spectroscopy was used to study changes in cell compositions of bio-molecules in M.aeruginosa depending on the nutrient concentrations. The amounts of glycogen and lipid have been found to increase in the logarithmic growing phase under the high nutrient conditions. This may suggest that M.aeruginosa absorbs and uses nutrients effectively under eutrophicated conditions.A new mathematical model of a lake ecosystem has been constructed taking into account of increase in water temperature. Analyses of the model shows that there exists a critical value of water temperature, and that algal bloom occurs if water temperature exceeds the value in summer time, suggesting regime shift in lake ecosystems. It was also pointed out that macrophytes have significant effects on suppressing algal blooms, and that management of lake ecosystems needs feed back control by taking into account of uncertainty of lake ecosystems.

以铜绿微囊藻（M.aeruginosa）、鞭毛虫（M.guttula）和少量细菌（P.putida等）组成的微宇宙为模型，研究了湖泊生态系统中的种群动态和稳定性。点斑微囊藻对铜绿微囊藻的捕食作用与营养盐浓度呈权衡关系;随着营养盐浓度的增加，食物（铜绿微囊藻）的品质提高，从而提高了点斑微囊藻的生长速度。但高营养条件下铜绿微囊藻的光合活性增强，导致溶液pH值升高，从而降低了点滴微囊藻的生长速率。利用显微傅里叶变换红外光谱（FTIR）研究了铜绿微囊藻细胞内生物分子组成随营养盐浓度的变化。在高营养条件下，在对数生长期，糖原和脂类的含量增加。这说明富营养化条件下铜绿微囊藻能够有效地吸收和利用营养盐。模型分析表明，夏季水温存在一个临界值，当水温超过该临界值时，湖泊将发生水华，表明湖泊生态系统发生了动态变化。还指出，水生植物对抑制藻类水华具有重要作用，湖泊生态系统的管理需要考虑到湖泊生态系统的不确定性进行反馈控制。

项目成果

「愛知万博が環境影響評価制度に残したもの」in『市民参加型社会とは-愛知万博計画過程と公共圏の再創造』

《什么是公民参与型社会？爱知世博会的规划过程与公共领域的再创造》中的“爱知世博会在环境影响评估体系中留下了什么”

• 发表时间: 2005
• 作者: Shirakihara;K;松田裕之;松田裕之;松田裕之;松田裕之;松田裕之
• 通讯作者: 松田裕之

単純で誤差を含む数理モデルの提唱

提出一个有错误的简单数学模型

• 发表时间: 2005
• 期刊: 月刊海洋 37
• 作者: Rossberg A G;Yanagi K;Amemiya T;Itoh K.;H.Matsuda;T.K.Kar;中丸麻由子;松田裕之;K.Morita;M.Nakajima;M.Makino;P.A.Abrams;K.Kaji;T.Katsukawa;松田裕之;松田裕之;松田裕之;松田裕之;松田裕之
• 通讯作者: 松田裕之

環境生態学の視点からの捕鯨論争

环境生态学视角下的捕鲸争议

• 发表时间: 2005
• 期刊: Ship & Ocean Newsletter 108
• 作者: Rossberg A G;Yanagi K;Amemiya T;Itoh K.;H.Matsuda;T.K.Kar;中丸麻由子;松田裕之;K.Morita;M.Nakajima;M.Makino;P.A.Abrams;K.Kaji;T.Katsukawa;松田裕之;松田裕之;松田裕之;松田裕之;松田裕之;松田裕之;松田裕之;松田裕之;松田裕之;松田裕之;松田裕之;松田裕之;松田裕之;松田裕之;松田裕之;松田裕之;松田裕之
• 通讯作者: 松田裕之

We can eat fish more if we manage fishery more effectively. (in Japanese)

如果我们更有效地管理渔业，我们就能吃更多的鱼。

• 发表时间: 2006
• 期刊: Risen 83
• 作者: Kitaura;J.;Matsuda H
• 通讯作者: Matsuda H

Relationship between whale and its prey fish. (in Japanese)

鲸鱼和它的猎物鱼之间的关系。

• 发表时间: 2006
• 期刊: Utility and Conservation of Sea
• 作者: 加納義彦;原田泰志;河村功;古川文美子・山田有紗・大畠麻里・和田恵次;Matsuda H
• 通讯作者: Matsuda H