Features of Environment-Material Cycle-Ecosystem Relationship in Lake Baikal

贝加尔湖环境-物质循环-生态系统关系特征

基本信息

批准号：
04044155
负责人：
OKUDA Setsuo
金额：
$ 8.77万
依托单位：
Okayama University of Science
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1994
项目状态：
已结题

项目摘要

We will report here the synthetic results of our study including the works of each subject conducted by four subgroups.(1)Physical GroupsThis group has investigated the thermal bars along the eastern coast and found that their features were variable depending on the current pattern of the river waters flowing along the coast from Selenga delta.They published a new English booklet "PHYSICAL LIMNOLOGY OF LAKE BAIKAL : A REVIEW"(BICER PRINT) which introduced the past scientific works on the lake by Russian Physical Limnologists.(2)Chemical GroupThis group has studied the chemical substances to indicate the historical change in the sedimentation and found that some Photo-Synthetic pigments are effective indicators for the long term variation in the lake environments.(3)Biological GroupThis group has found that the measurement of isotopes of C and N is very useful to distinguish the difference in the food web between coastal and pelagic zones and to clarify the origin of sedimentary organics. The result of algae picoplankton surveys has shown that the seasonal variation in plankton is mainly governed with the thermal stratification in the surface layr.(4)Geological GroupThis group has studied the faults at the lake bottom and pointed that springs may supply some mineral substances into the lake. The X-ray CT method was clarified to be useful for the turbidite analysis.(5)Synthetic ResultsFrom synthetic studies, we obtained the following results.Exchange of water between coastal and pelagic zones is controlled with the thermal bar process, and more quantitative studies are required to clarify the physical mechanism of thermal bar and its effect on the lake environments.Some ecological environments at the surface and deep layrs are very complicated but interesting, various transport processes of material and energy, and their effect on the biological system should be studied extensively using various kinds of high technical methods and numerical modelling.

我们将在这里报告我们的研究的合成结果，包括四个亚组进行的每个受试者的作品。（1）物理小组研究了沿东海岸沿线的热条，发现它们的特征是可变的，具体取决于当前从塞伦塔（Selenga Delta）沿海地区流动的河水模式。 on the lake by Russian Physical Limnologists.(2)Chemical GroupThis group has studied the chemical substances to indicate the historical change in the sedimentation and found that some Photo-Synthetic pigments are effective indicators for the long term variation in the lake environments.(3)Biological GroupThis group has found that the measurement of isotopes of C and N is very useful to distinguish the difference in the food web between coastal and pelagic zones and to clarify the沉积有机物的起源。藻类皮克波克顿调查的结果表明，浮游生物的季节性变化主要由地表层中的热分层支配。（4）地质集团研究了湖底的断层，并指出泉水可能会向湖中提供一些矿物质物质。 X射线CT方法被阐明可用于浊度分析。（5）合成研究的合成结果，我们获得了以下结果。沿海和层状区域之间水之间的水分分配了热条形过程，需要进行热棒过程，需要更定量的研究，以阐明各种表面环境的效果及其对湖泊的影响。材料和能量的过程及其对生物系统的影响应使用各种高技术方法和数值建模进行广泛研究。