JAPANESE JOURNAL OF ECOLOGY
Online ISSN : 2424-127X
Print ISSN : 0021-5007
ISSN-L : 0021-5007
Volume 14 , Issue 4
Showing 1-13 articles out of 13 articles from the selected issue
  • Type: Cover
    1964 Volume 14 Issue 4 Pages Cover1-
    Published: August 01, 1964
    Released: April 08, 2017
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  • Type: Cover
    1964 Volume 14 Issue 4 Pages Cover2-
    Published: August 01, 1964
    Released: April 08, 2017
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    Download PDF (28K)
  • Type: Appendix
    1964 Volume 14 Issue 4 Pages App1-
    Published: August 01, 1964
    Released: April 08, 2017
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  • Kichiro SHINOZAKI, Kyoji YODA, Kazuo HOZUMI, Tatuo KIRA
    Type: Article
    1964 Volume 14 Issue 4 Pages 133-139
    Published: August 01, 1964
    Released: April 08, 2017
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    To test the applicability of the pipe model theory to actual tree form, the frequency distribution of the thickness of woody organs in a tree was examined in 10 different species. The frequency f(D) of a certain diameter class D proved to have a definite pattern of distribution in the root, branch and trunk respectively, with only a little difference between the species. The obtained f(D)〜D curves showed that a root system could well be approximated by the assemblage of many pipes of unit thickness, a trunk by a few cones piled up one upon another, and a branch system by a geometric model intermediate between the two. The results were well consistent with the pipe model theory of tree form. As an application of the theory in forest ecology, a new method for estimating the amounts of leaves or branches of trees and stands was also proposed, based on the direct proportionality found between those amounts and the cross-sectional area of the trunk at the height just below the lowest living branch.
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  • Tsukasa KOMATSU
    Type: Article
    1964 Volume 14 Issue 4 Pages 140-147
    Published: August 01, 1964
    Released: April 08, 2017
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    The present paper deals with the ecological studies of aquatic communities of Okawa River, Yogo River, Ane River and Seri River which flow into the northeastern part of the Lake Biwa. The biotic index of the same rivers was determined based on the BECK-TSUDA method. The field study was made in spring (Seri River) and summer (other rivers) in 1963. The results are summarized as follows : 1. Okawa River and Yogo River had more standing crops of aquatic insects than Ane River and Seri River. But the mouth of Yogo River had less standing crop, the river being polluted by drainages of paddy fields and sewages. The lower part of Ane River which is polluted by wastes from a paper mill, had small standing crop. The lower part of Seri River which is polluted by sewages of Hikone City and besides dried up in winter, had also small standing crop. 2. The standing crop of each life form of aquatic insects is shown in Fig. 3. 3. The biotic indexes of the four rivers are shown in Fig. 4. In the lower parts of those rivers, a low biotic index is obtained because of various ill-effects.
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  • Yoshio SHIMURA
    Type: Article
    1964 Volume 14 Issue 4 Pages 147-153
    Published: August 01, 1964
    Released: April 08, 2017
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    An ecological study was made on Osmunda lancea var. latipinnula (O.i.), O. lancea (O.l.) and O. japonica (O.j.) from a large community along a rivulet (ca. 2 km in distance, 3〜8m in width, 2〜6m in depth and ca. 100m in alt.)which runs between Sandomaki and Nakamura at Yoshiwara City, Shizuoka Prefecture at the southern foot of Mt. Fuji. The writer carried out the studies on about 1000 stocks of O.i. which grow along the rivulet, and the following features were studied : the habitat segregation of closely related species, the observation of budding, the comparison of the growth process of the fertile fronds and sterile fronds in a stock, the determination of the mature period and the spore's germinating ability from March to June in 1963. The composition of the community (as regards these three ferns only) both in the slope and on the bed along the rivulet was investigated by the quadrat method using 20 quadrats of 1m×3m on the slope and of 1m×1m on the bed. It is reaffirmed as shown in Tables 1 and 2 that O.j. is situated mainly between the area of O.l. and O.i., and the location of these three species indicate the so-called "habitat segregation" along the rivulet.
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  • Yukio UMEZU
    Type: Article
    1964 Volume 14 Issue 4 Pages 153-160
    Published: August 01, 1964
    Released: April 08, 2017
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    In der Nahe von Yukuhasi kommt eine endemische Halophyt, Suaeda japonica MAKINO vor. Die Standort der Suaeda japonica-Gesellschaft wurde vorher als die Salzfelder benutzt, aber vor einigen Jahren verlassen. Als Ergebnisse der pflanzensoziologischen Aufnahmen konnte der Verfasser die folgenden Pflanzengesellschaften unterscheiden. 1. Die Suaeda japonica-Atriplex Gmelini-Assoziation. 2. Die Limonium tetragonum-Assoziation. 3. Das Rohrricht-Seggen-Sumpfe. 4. Die Imperata cylindrica-Fazies von derselben Assoziation. 5. Die Vitex rotundifolia-Lathyrus maritimus-Sanddunengesellschaft. 6. Der Zoysia sinica var. nipponica-Wiese. Die ersten zwei Assoziationen entstehen auf dem Tonboden am Rand von den Buchten, die bei Flut von Meereswasser getaucht, aber bei Ebbe hier und dort getrocknet werden. Diese aber befindet sich in Brackwasser. Wenn es entsalzt wird, so erscheint das Rohrricht-Seggen-Sumpfe, aber, wenn es verlandet, so folgt die Zoysia sinica var. nipponica- und endlich die Imperata-Wiese. Auf dem Dunensand, wo die Flut nie kommt, besiedelt sich die Vitex rotundifolia-Lathyrus maritimus-Gesellschaft. Suaeda japonica ist eine Therophyt ; sie keimt Anfang Dezember, ihre Blatter farben sich Ende September in den schonen Purpur und sie stirbt in Dezember ab. Sie ist nicht nur salzhaltbar, sondern auch eigentlich salzliebend.
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  • G.H. SCHWABE
    Type: Article
    1964 Volume 14 Issue 4 Pages 161-170
    Published: August 01, 1964
    Released: April 08, 2017
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  • [in Japanese]
    Type: Article
    1964 Volume 14 Issue 4 Pages 170-172
    Published: August 01, 1964
    Released: April 08, 2017
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  • Type: Appendix
    1964 Volume 14 Issue 4 Pages 173-174
    Published: August 01, 1964
    Released: April 08, 2017
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  • Type: Appendix
    1964 Volume 14 Issue 4 Pages App2-
    Published: August 01, 1964
    Released: April 08, 2017
    JOURNALS FREE ACCESS
    Download PDF (44K)
  • Type: Cover
    1964 Volume 14 Issue 4 Pages Cover3-
    Published: August 01, 1964
    Released: April 08, 2017
    JOURNALS FREE ACCESS
    Download PDF (35K)
  • Type: Cover
    1964 Volume 14 Issue 4 Pages Cover4-
    Published: August 01, 1964
    Released: April 08, 2017
    JOURNALS FREE ACCESS
    Download PDF (35K)
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