Studies on mass speciation in response to major climatic events in the Cenozoic

分子系统发育分析了一些动物群体，包括陆地和海洋哺乳动物（鹿科、牛科、猪科、海牛、鲸目、鳍足目）、真真骨鱼类鲈形目和海洋腹足类（Umboniinae，Turbiniidae，Potamididae，Batillariidae和Buccinidae），基于线粒体12 s和16 s rRNA基因以及细胞色素B基因的核苷酸序列数据，我们的系统发育分析表明，物种形成事件同时发生在陆地和海洋生态系统中的多个动物类群之间，表明这种大规模物种形成事件是由新生代的主要气候事件引起的。日本晚第三纪和第四纪浅海暖-暖-暖-研究表明，许多暖水种从南部侵入到中部，而在南部和中部，暖水种则从南部侵入到中部。在温暖的事件和他们的定居点和地理隔离后，日本群岛周围的气候最佳导致大规模物种形成的纬度。暖事件的反复发生使黑潮动物群组成发生更新，并最终建立了现今黑潮动物群。在这项研究中，我们总结了日本新近纪和第四纪海洋软体动物的范围图，以清楚地显示大规模物种形成事件的事实。在国际科学期刊和教科书上发表了关于鹿科、鲸目和真硬骨目鲈形目的分子系统发育分析的论文。

Molecular phylogenetic analyses were made for a number of animal groups including terrestrial and marine mammals (Cervidae, Bovidae, Suidae, Sirenians, Cetacea, Pinnipedians), euteleostean Perciforms and marine gastropods (Umboniinae, Turbiniidae, Potamididae, Batillariidae and Buccinidae), based on the nucleotide sequence data of mitochondrial 12s and 16s rRNA genes and cytochrome b gene.Our phylogenetic analyses revealed that speciation events occurred synchronously among a number of animal group in both terrestrial and marine ecosystems, suggesting that this mass- speciation events were induced by the major climatic events in the Cenozoic.In this study, a new schema on the chlonological and geographical distribution of the Japanese Neogene and Quaternary shallow marine warm-water molluscan faunas is also presented in relation to the Neogene warmmarine climatic events in the Pacific.The present study revealed that many warm-water species invaded from the south into the mid-latitudes during the warm events and their settlements and geographical isolation around the Japanese Islands after the climatic optima led to mass-speciation. The warm events repeatedly made renewal of the faunal composition and finally have established the preset-day Kuroshio fauna. In this study we summarized the range charts of the Neogene and Quaternary marine molluscs in Japan to show clearly the facts of mass-speciation events. Papers on the molecular phylogenetic analysis of the Cervidae, Cetaceans and euteleostean Perciforms were published on the international scientific journals and text-book.