著者

田中 正明 武田 正倫 永野 真理子

出版者

国立科学博物館

雑誌

国立科学博物館専報 (ISSN:00824755)

巻号頁・発行日

vol.43, pp.419-439, 2006

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The micro-organisms in 35 samples obtained from inside moats of the Imperial Palace of Japan in Tokyo during the years 2000-2004 were studied, and only the additional species unrecorded in the previous survey during the years 1996-1999 are enumerated. They are 49 species of 35 genera, viz. 10 species of 8 genera in the Protozoa (8 species of Rhizopoda, and 2 species of Chiliatea), 22 species (including variety and forma) of 12 genera in the Rotatoria, 1 species of the Gastrotricha, 1 species of the Nematoda, 15 species of 13 genera in the Arthropoda (13 species of Crustacea, and 2 species of Insecta). In 20 samples obtained in the previous survey, 81 species of 40 genera were recorded (Tanaka & Takeda, 2000), although the nematod worms and insect larvae were not examined. As a result, at present, the micro-organisms are known by a total of 130 species of 63 genera from four inside moats, Kami-dokan-bori, Naka-dokan-bori, Shimo-dokan-bori and Hasuike-bori, and from a small pond, Hisago-ike. Comparing the limnological fauna of the inside moats of the Imperial Palace of Japan with that of some ponds in the Akasaka Imperial Gardens in Tokyo recorded by Tanaka et al. (2005), it is definitely said that the inside moats of the Imperial Palace of Japan are still kept in good condition due to its large scale, though the Imperial Palace of Japan is surrounded by artificial buildings in Metropolitan Tokyo.