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Freshwater Biodiversity in the countries surrounding the Japan Sea.

日本海周边国家的淡水生物多样性。

基本信息

批准号：
11695073
负责人：
HANAZATO Takayuki
金额：
$ 2.82万
依托单位：
Shinshu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11695073/
关键词：
BIODIVERSITY FRESHWATER BODIES EAST ASIA 淡水生物

项目摘要

The Japan Sea was changed from a freshwater lake to a sea ca. 10,000 years ago. This might separate the organisms in the lake into Japan and other countries facing the sea. It is expected, therefore, that they have developed in different ways between the countries, and that investigations on the distribution of the organisms help us with understanding how the freshwater biodiversity has been developed. In the present research project, we attempted to perform the investigations.Animals of the crustacean genus, Gnorimosphaeroma, are distributed in various water bodies, freshwater lakes, blackish lakes and sea. We have found that some species survive in different habitats between Japan and Korea: e.g., G. naktongense, which inhabits freshwater bodies in Japan, have been collected only from brackish lakes in Korea, while G. chinense, which are common species in blackish lakes in Japan, have scarcely been found in the same environment in Korea.In the investigation on freshwater Cladocera, three out of 28 species we collected from Korea have been found to be the species absent from Japan. The way of Cladocera to be distributed in such countries are discussed.The isozyme analyzes of freshwater fish of the genus Pungitius collected from countries surrounding the Japan Sea have demonstrated that the blackish-typed animals of P. tymensis collected from the countries are in a genetic group, while that the freshwater-typed ones, which have been known to be in a genetic group, are divided into two groups. The results suggest that it is necessary to reconsider the distribution of the fish in East Asia.

日本海从淡水湖变成了海水湖。一万年前。这可能会将湖中的生物分为日本和其他面向海洋的国家。因此，预计它们在各国之间以不同的方式发展，对生物分布的调查有助于我们了解淡水生物多样性是如何发展的。本研究尝试对该属的甲壳动物进行调查，发现该属的动物分布于各种水体、淡水湖泊、微黑湖泊和海洋中。我们发现，有些物种在日本和韩国之间的不同栖息地生存：例如，G. naktongense，栖息于日本的淡水水体中，仅在韩国的半咸水湖泊中采集到，而G. chinense是日本黑色湖泊中的常见种，在韩国的相同环境中几乎没有发现，在对韩国淡水枝角类的调查中，我们发现28种枝角类中有3种是日本没有的种。本文讨论了枝角类在这些国家的分布方式，并对日本海周边国家的淡水鱼Pungitius进行了同工酶分析，结果表明，日本海周边国家的淡水鱼Pungitius的黑色型为一个遗传群，而淡水型为两个遗传群。研究结果表明，有必要重新考虑东亚鱼类的分布。