Determining factor of species richness in river based on species-area relation

本研究的目的是基于物种-面积关系揭示河流物种丰富度的决定因素。记述了日本九州北方棘鳅科（鲤形目，鳅科，鳅属）一新种、二新亚种和榆甲科（鞘翅目，榆甲科，中华爪螨属）一新种。结果，我确定了40个水系中真正的淡水鱼、水甲虫和淡水贻贝的物种数。现在我继续分析物种数量与河流规模或某些环境结构之间的关系。

The purpose of this study is to reveal the determining factor of species richness in river based on species-area relation. I described one new species and two new subspecies of spined loach (Cypriniformes, Cobitidae, Cobitis) and one new species of elmid beetle (Coleoptera, Elmidae, Sinonychus) from northern Kyushu, Japan. As a result, I decided the species number of genuine freshwater fish, water beetle, and freshwater mussel in 40 river systems. Now I am continuing to analyze about the relationships between species number and river scale or some environmental structure.