Distribution of Mudskipper and Living Things in the Tideland Area of the Ariake Sea and Changes of its Environment

1990年至1992年期间进行的研究所取得的结果总结如下：1。分别采用有限差分法和有限元法建立了有明海海流数值模拟模型。其结果是，能够对边界条件随时间变化的海域中的流进行数值模拟。了解了有明海复杂的流态.根据实测资料，阐明了浅海近海底水流的详细结构。阐明了有明海内部潮滩底质再悬浮的水文特征和机制.建立了流动注射分析海水中磷酸盐和天然沃茨中痕量铜（II）的方法。光散射法测定海水中痕量磷酸盐在分析化学领域中尚属首次.阐明了有明海内陆潮滩区海水中氮化合物的空间分布和时间变化，以及磷、氮化合物的行为与环境因子的关系.明确了有明海内部滩涂弹涂鱼保护区和非保护区的线虫区系，探讨了线虫区系与弹涂鱼生境的关系，阐明了弹涂鱼仔、稚贝和折叶蛤幼贝的出现、分布及其与滩涂环境因子的关系。此外，还提出了增加弹涂鱼数量的方法。

The Results obtained by the studies which were carried out over the periods from 1990 to 1992 are summarized as follows:1. The numerical models for the current simulation of the Ariake Sea using the finite difference method and finite element one were developed. As the results, the numerical simulation of the current in the sea where the boundary conditions change with time were enabled. The complex flow patterns in the Ariake Sea were understood.2. The detail structures of flow near the shallow sea bottom were clarified on the basis of the field data. The pheological properties and mechanisms of resuspension of the bottom mad of tideland in the interior parts of the Ariake Sea were made clear.3. The simple and high sensitive methods of flow injection analysis of phosphate in the sea water and specific determination of the trace amounts of copper(II) in the natural waters using the homolysis reaction of porphyrin were developed. The determination of trace amounts of phosphate in the sea water by light scattering were first made in the field of analytical chemistry.4. The spatial distribution and temporal variations of the nitrogen compounds, and the relationship between the behavior of phosphate and nitrogen compounds and the environmental factors in the sea water of tideland area of the interior parts of the Ariake Sea were clarified.5. The nematoda fauna in the protected and unprotected area of mudskipper in the tideland of the interior parts of the Ariake Sea were made clear, and the relationship between nematode fauna and mudskipper's habitat was discussed.The appearance and distribution of mudskipper's larvae and juveniles and young shell of jackknife clam, and the relationship between those and environmental factors of tideland were clarified. In addition, the method for increase of mudskipper were developed.