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Research on Coastal Environmental Conservation

海岸带环境保护研究

基本信息

批准号：
15800003
负责人：
TERAZAKI Makoto
金额：
$ 13.44万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Special Purposes
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

The tidal residual current in Otsuchi Bay on the Sanriku Coast shows a clear seasonal change.An anti-clockwise circulation exists in stratified period from spring to autumn, flowing into the bay along northern coast and out along the southern coast, while an estuary-type vertical circulation isdominant from autumn to spring, when there is strong surface mixing due to the NW monsoon wind. This study also estimates the time scale of water exchange of the Bay at approximately 10 days. A benthic diatom Nitzschia navis-varingica isolated from blackish water in Vietnam was found to produce domoic acid. In the survey on the distribution of domoic acid-producing diatom, domoic acid-producing N. navis-varingica was found to distribute in wide areas from Sanriku coast, a northern Pacific area of Japan to south asian countries such as ryukyu island and Philippines. In addition, several strains collected from Philippines were found to produce isomers of domoic acid as well as domoic acid. These fi … More ndings show the wide distribution of domoic acid-producing N. navis-varingica in the world. Thus, domoic acid in various bivalve species collected from tropical areas was screened by ELISA based on the specific antibody against domoic acid which was developed in the present study. The results of the study showed that a significant level of domoic acid was accumulated in the specific bivalve species belonging to a genus Spondylus. No domoic acid was detected in other bivalve species collected from the same areas as Spondylus spp.We studied marine pollution of hazardous chemicals such as organochlorine compounds, organotin compounds and heavy metals using marine mammals, fishes, crustaceans, etc. Specific accumulation pattern was recognized in Baikal seals and Dall's porpoises. We found the lower reproductive rate, the morphological abnormality, and the sexual disturbance of Caprella danilevskii exposed at the natural level by organotin compounds and coplanar PCBs. Mitogen-induced responses in marine mammal and human lymphocytes by in-vitro exposure of butyltins and non-ortho coplanar PCBs indicated that butyltins were more toxic at the natural level compared with the coplanar PCBs. The influenza A viruses originated from humans were detected from serum samples of Caspian seals, Baikal seals and the ringed seals from the Arctic Ocean. Dall's porpoises and baleen whales off the coast of Japan were also infected at lower level by influenza A viruses. Less

三陆海岸大槌湾的潮余流具有明显的季节变化，春季至秋季的分层环流为逆时针环流，沿沿着北方海岸流入，沿沿着南部海岸流出，秋季至春季的垂直环流为河口型环流，此时西北季风造成强烈的表层混合。本研究还估计了海湾的水交换的时间尺度约为10天。从越南微黑的海水中分离出一种底栖硅藻Nitzschia navis-varingica，发现其产生软骨藻酸。在对产软骨藻酸硅藻分布的调查中，发现了产软骨藻酸N。从日本北方太平洋三陆海岸到琉球、菲律宾等南亚国家，分布广泛。此外，发现从菲律宾收集的几个菌株产生软骨藻酸的异构体以及软骨藻酸。该等五 ...更多信息结果表明，软骨藻酸产生菌分布广泛。navis-varingica在世界上。因此，软骨藻酸的各种双壳类采集自热带地区的ELISA筛选软骨藻酸的基础上，在本研究中开发的特异性抗体。研究结果表明，软骨藻酸在属于脊椎动物属的特定双壳类物种中积累了显着水平。没有软骨藻酸被检测到在其他双壳类物种从同一地区采集的脊椎动物属。我们研究了海洋污染的危险化学品，如有机氯化合物，有机锡化合物和重金属，使用海洋哺乳动物，鱼类，甲壳类动物，等特定的积累模式被确认在贝加尔湖海豹和达尔鼠海豚。我们发现在自然水平暴露于有机锡化合物和共面多氯联苯后，丹尼洛夫Caprella danilevskii的繁殖率较低、形态异常和性障碍。在海洋哺乳动物和人类淋巴细胞的有丝分裂原诱导的反应，在体外暴露的丁基锡和非邻位共面的多氯联苯表明，丁基锡是更大的毒性在自然水平相比，共面的多氯联苯。从里海海豹、贝加尔湖海豹和北冰洋环斑海豹的血清样品中检测到人源甲型流感病毒。日本沿海的达尔鼠海豚和须鲸也感染了较低水平的甲型流感病毒。少