Succession of the Pleistocene and recent hormatypic coral

2001年7 ~ 8月在日本琉球石垣岛、伊布岛和菊开岛研究了近代和第四纪化石珊瑚礁。采用面积为1 m^2的样方定量方法，对石垣岛白鹤珊瑚礁沿岸的近期珊瑚群落进行了记录。用样方法对菊海岛和伊武岛垂直露头的更新世群落进行了调查。根据实地研究中拍摄的草图和照片估计了最近雌雄共生珊瑚群落的覆盖范围。利用图像分析软件（NIH image）计算每个物种的相对丰度。在龟海岛上胜海岸的露头上重建了全新世海平面变化时期的雌雄珊瑚群落演替。对龟岛石杜克露头进行了更新世珊瑚演替分析。

Recent and Quaternary fossil coral reefs were studied in Ishigaki-jima, Irabu-jima and Kikai-jima in the Ryukyu Island, Japan from July to August 2001. The recent coral communities were recorded by a quantitative method with quadrat (1 m^2 in area) along the coast of Shiraho coral reef in the Ishigaki-jima. Pleistocene communities were also investigated on vertical outcrops in the Kikai-jima and Irabu-jima with quadrat methods.Coverage of the recent hermatipic coral communities was estimated with sketches and photographs which were taken through the field studies. Relative abundance of each species was calculated by using software for image analysis (NIH Image). Community successions of the hermatypic corals through the Holocene sea-level changes were reconstructed on the outcrop at Kamikatetsu coast of the Kikai-jima. Pleistocene coral successions were analyzed on the outcrops at Shidooke, Kikai-jima.