The Natural Environmental Science Research

The Kanto Loam formations in the northwestern part of Zama Hills, central Japan

Shuichi KUDO, Shigeaki TAKANO, Yuji YUNOKI

1995 Volume 8 Pages 1-12
Published: November 30, 1995
Released on J-STAGE: December 25, 2024

DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.32280/nesr.8.0_1

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By the drilling investigation in the northwestern part of Zama Hills, we have recognized many pumice beds in the Kanto Loam Formation, including TP (Tokyo Pumice bed), Pm-l (Ontake daiichi pumice bed), UP (Uwabami Pumice bed), ZBP (Zama B Pumice bed), etc.
These beds except ZBP are important key pumice beds in the Kanto Loam Formation and show many similarities to their respective counterparts in the Oiso Hills and the Tama Hills.
ZBP, deposited 30-70 cm under the UP, should be correlated with Tu-7 (or β) pumice bed in the Oiso Hills according to stratigraphy. But, the fact that Tu-7 is much larger than ZBP in thickness makes it hard to correlate them.
For the Tama Hills, on the basis of similar lithofacies, we correlate the ZBP with the pumice bed or pumice lens in “Shimofuri Zone” which is sandwiched between UP and Hmp (Hyoumon Pumice bed). Hmp is generally correlated with Tu-7.
We consider that ZBP is one of the pumice beds which have a possibility to be distributed in the Zama and Tama Hills, but not in the Oiso Hills, provided that the correlation Hmp = Tu-7 is true.

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Invasion of Chlorophyllum molybdites, a tropical mushroom into Kyoto-Osaka-Kobe Metropolitan Area, Kinki District, Japan.

Kazumasa YOKOYAMA

1995 Volume 8 Pages 13-21
Published: November 30, 1995
Released on J-STAGE: December 25, 2024

DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.32280/nesr.8.0_13

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Chlorophyllum molybdites, a tropical and poisonous mushroom appeared in 1980 at Takatsuki City, Osaka Prefecture, and expanded around the urban area of Osaka, and at the end of the 1980's invaded into the southern part of Kyoto Prefecture and Kyoto City. The reason of survival and expansion of this tropical mushroom in this area are discussed. Four cases of poisoning caused by this fungus are reported including the cases happened in Osaka and Kyoto recently.

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Relative frequency and spatial distribution of the different plant types in the Heterotropa hexaloba populations

Akinori UCHINO, Masao HAMAMURA

1995 Volume 8 Pages 23-33
Published: November 30, 1995
Released on J-STAGE: December 25, 2024

DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.32280/nesr.8.0_23

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The Heterotropa hexaloba has various stamens on morphology and number. Therefore, individuals with different types of flowers, based on the various stamen combinations, were found in some populations. This situation was examined in detail in two populations of Kumamoto Prefecture: Otori-toge (Ot) and Jiromaru-dake (Jr). The relative frequencies of three categories of plant types due to different types of flowers, the perfecta type, the hexaloba type, and other types, were stable in the two populations for two or three years. The spatial distribution of the individuals was also analyzed in the populations. The flowering individuals with different plant types scattered at random in the analyzed areas. To understand this situation, we analyzed distribution patterns of the three growth stages, i.e., the infant, nonflowerig, and fowering stages, by the m*-m method.

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Diatoms from Akan-ko (Lake Akan) in Hokkaido, Japan

3. Araphid diatoms except for Fragilaria sensu lato

Ayako KAWASHIMA, Hiromu KOBAYASI

1995 Volume 8 Pages 35-49
Published: November 30, 1995
Released on J-STAGE: December 25, 2024

DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.32280/nesr.8.0_35

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In this paper, a continuation of our previous two papers, 17 taxa belonging to the genera Asterionella, Ceratoneis, Ctenophora, Diatoma, Martyana, Meridion, Synedra, Tabellaria are reported with light and scanning electron microscope photographs. Some comments are made mostly on the taxonomy and morphology of each taxon.

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Home range and habitat preference of the badger Meles meles anakuma in Mt. Nyugasa, Nagano Prefecture, Japan

Yuji YAMAMOTO

1995 Volume 8 Pages 51-65
Published: November 30, 1995
Released on J-STAGE: December 25, 2024

DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.32280/nesr.8.0_51

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During 1984-95, studies on the home range, the habitat preference and the activity rhythm of Badger, Meles meles anakuma, using the radio telemetry were performed at Nyugasayama (Mt, Nyugasa), Nagano Prefecture, located at the subalpine belt. Sizes of the home range was calculated by the use of the harmonic mean and other two methods. The sizes calculated by the 95% harmonic mean were 200.5-407.1 ha. The home range size and the activity reduced remarkably during the winter period. Females were active in all the day in their suckling period. Badgers tended to select a certain environment for their habitat. Except in the winter period, they clearly preferred residential area, while avoided Japanese larch plantation.

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The genus Hypnum (Musci) in Japan II

Hisatsugu ANDO

1995 Volume 8 Pages 67-99
Published: November 30, 1995
Released on J-STAGE: December 25, 2024

DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.32280/nesr.8.0_67

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Of the 19 Hypnum species known from Japan, the following 15 species are treated, with synonymy, description, illustration, ecology, distribution, selected diagnostic characters and differentiation from alied species: Hypnum dieckii, H. erectiusculum, H. fauriei, H. fujiyamae, H. lindbergii, H. oldhamii, H. pallescens, H. plicatulum, H. plumaeforme (including var. minus), H. pratense, H. saitoi, H. sakuraii, H. subimponens spp. ulophyllum, H. tristo-viride, and H. vaucheri.

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Index of Atmospheric Purity (IAP) calculation method by computer program

Yoshinori MINAMI, Mitsuo TANABE

1995 Volume 8 Pages 101-105
Published: November 30, 1995
Released on J-STAGE: December 25, 2024

DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.32280/nesr.8.0_101

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Epiphytic bryophytes and lichens are valid indicator plants of air pollution. High correlation between pollution concentration and an index calculated from the species composition, coverage and frequency of such plants has received much recognition. This index is called IAP (Index of Atmospheric Purity). We have successfully made a computer program intended for use with Lotus1-2-3 to give IAP, which may make this index more useful owing to the following three advantages: 1. making it possible to calculate IAP by using as only input the coverage (%) of species obtained at each study station; 2. requiring shorter calculation time; 3. if neccessary, allowing recalculation to be effected simply by addition of the input data for new study stations which must be further taken into account.

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Bryophytes of Mt. Takao, Tokyo Metropolitan, Japan

I. Mosses

Ryozo WATANABE, Kimiko IWAKATA, Takeshi OHASHI, Kuniko SUGA, Koji SUGI ...

1995 Volume 8 Pages 107-127
Published: November 30, 1995
Released on J-STAGE: December 25, 2024

DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.32280/nesr.8.0_107

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On the bases of about 1,300 specimens collected from Mt. Takao, west of Tokyo Metropolitan. 152 species are recorded Taxa of phytogeographic interest include Bartramiopsis lescurii, Barbella flagellifera, Pyrrhobryum latifolium, and Theriotia khashmirensis.

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Accumulation and influence of heavy metals and radioactive substances in bryophytes

Yoshinori MINAMI, Showzaburoh HIRAOKA

1995 Volume 8 Pages 129-134
Published: November 30, 1995
Released on J-STAGE: December 25, 2024

DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.32280/nesr.8.0_129

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The present article reviews the current knowledge of absorption and accumulation of heavy metals and radioactive substances in bryophytes. A number of studies have heretofore given evidence to suggest that bryophytes have unusually high ability to absord and accumulate heavy metals and radioactive substances as compared with other plants, such as vascular plants, and that may indicate the pollution levels in an area under study at that time. We suggest the availability of bryophytes as indicator plants of distribution and pollution level of heavy metals and radioactive substances.

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