Bulletin of the Saitama Museum of Natural History
Online ISSN : 2433-8508
Print ISSN : 1881-8528
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Original Reports
  • Hideo TAKAGI, Satomi HIROSE
    2020 Volume 14 Pages 1-10
    Published: 2020
    Released: June 07, 2020
    The purpose of this study is to assess geosites of the Geopark Chichibu from the perspective of various values, highlight their advantages and problems, and finally contribute to the management of the Geopark Chichibu through presenting this study to the public. In order to attain the above purpose, research has been conducted to 34 new geosites of the Geopark Chichibu proposed in July, 2018 with additional 5 geosites considered to be important. Total 39 geosites are assessed from the perspective of six values; educational value, scientific value, tourism value, safety and accessibility, conservation and site sustainability, and value of tourism information. After showing advantage and problem for selected geosites, this study proposes a partial change on new geosites of the Geopark Chichibu from the perspective of geotourism as well as ways to make the Geopark Chichibu more attractive to many people who are interested in it.
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  • Masaya YAMAMOTO, Makoto TAIRA
    2020 Volume 14 Pages 11-16
    Published: 2020
    Released: June 07, 2020
    Primula reinii (Primulaceae) is found on wet shaded rocky cliffs in the mountains of Japan. The primrose comprises four varieties; three of these varieties—vars. reinii, rhodotricha, and kitadakensis—are found on the Chichibu Mountains, Saitama Prefecture. The taxonomic treatment of the species found on Mt. Ryokami is still uncertain owing to morphological variability. We conducted molecular phylogenetic analyses based on chloroplast sequences to elucidate the taxonomic treatment of P. reinii collected from the mountain. The primrose was clearly identified as var. reinii in our well-resolved phylogenetic trees. Our study provides baseline information for the endangered primrose towards conservation in the future.
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  • Yasuyuki IWATA, Kazutaka TOGASHI, Tomofumi IWATA
    2020 Volume 14 Pages 17-24
    Published: 2020
    Released: June 07, 2020
    Gyrinus japonicus is one of the endangered species and has decreased rapidly recent years. This species was studied in the low mountain to mountain area of Saitama and Yamanashi prefecture. From this survey, it was found the habitat of G. japonicus has the following characteristics: 1) main habitat is dammed pools (type: debris dam) and scour pools (type: eddy) in slow water of the river, 2) such pools are often in the dark site surrounded by forests, 3) the water surface is almost uncovered by branches and aquatic plants, 4) water quality is high transparency and oligotrophic state, 5) several water beetles and bugs living in/on running water (ex. Orectochilus regimbarti, Platambus pictipennis, Hydrocassis lacustris and Metrocoris histrio) or that live in the dark site surrounded by forests (ex. Gerris gracilicornis, Gerris insularis and Aquarius elongatus) were collected with G. japonicus. The result of this survey suggested that local populations of this species have already isolated at the river (ex. pools) with such characteristics in low mountain area range in Saitama around 2000 to 2010. Afterward, this water beetle was considered to be extinct due to changes in the river environment such as a decrease in water volume.
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