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Construction of "Lake Biwa standard models" for the 21st century-Predict models on the basis of universal truth of physics, chemistry and biology-

构建21世纪“琵琶湖标准模型”-基于物理、化学、生物普遍真理的预测模型-

基本信息

批准号：
10308025
负责人：
NAKANISHI Masami
金额：
$ 22.91万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A).
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

项目摘要

In physical years 1998 and 1999, to obtain basic data on plankton communities available for construction of "Standard Models of Lake Ecosystems", we had field observations of spatio-temporal changes in biomass and grazing rates of planktonic organisms-virus, bacteria, picoalgae, nanoalgae, microalgae, heterotrophic nanoflagellates and crustaceans-in Lake Biwa. Further, we detected vertical distribution patterns of pico, nano and micro planktonic algae intertwining with diffusive convection of water through surveys from May to December 1999 at one week intervals.In a physical year 2000, five models of lake ecosystems were constructed on the basis of physico-chemical and biological data obtained.1. "A multi-diffusive convection model of lake ecosystems"It was shown that the double-diffusive convection consisting of heat drived by particle precipitation and suspended matter is a multi-diffusive convection system which many kinds of substances such as particles and dissolved matter circulate in lakes.2. "A model of seasonal changes in vertical distribution of water temperature and nutrients in Lake Biwa" Seasonal changes in vertical distribution of water temperature and nutrients were reappeared by constructing a new model in conbination of momentum equation with heat transfer and turbulent diffusion equations.3. "A model of matter cycle in lake ecosysterns" was built on the basis of behaviors of carbon, nitrogen and phosphorus through food webs in plankton communities.The rest are "A model of vertical distribution of phytoplankton" inducing turbulent diffusion item into a light-nutrient model and "A coexistence model of phytoplankton and bacteria in microbial loop".

在物理年1998年和1999年，获得浮游生物群落的基本数据，可用于建设“湖泊生态系统的标准模型”，我们有现场观测的时空变化的生物量和放牧率的浮游生物体的病毒，细菌，picoalgae，nanoalgae，microalgae，异养nanoflagellates和甲壳类-在琵琶湖。1999年5月至12月每隔一周进行一次调查，发现皮科、纳米尺度和微米尺度浮游藻类与水体扩散对流相互交织的垂直分布格局，并在2000年建立了5个湖泊生态系统模型.“湖泊生态系统的多扩散对流模型“研究表明，由颗粒沉降驱动的热量和悬浮物驱动的双扩散对流是一个颗粒、溶解物等多种物质在湖泊中循环的多扩散对流系统.“琵琶湖水温和营养盐垂直分布的季节变化模型”通过将动量方程与传热和湍流扩散方程相结合构建新的模型，再现了水温和营养盐垂直分布的季节变化。3.其中，以碳、氮、磷在浮游生物群落食物网中的行为为基础，建立了“湖泊生态系统物质循环模型”，将湍流扩散项引入光营养模型的“浮游植物垂直分布模型”和“微生物环浮游植物与细菌共存模型”。