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Volume 7, Issue 4
Displaying 1-6 of 6 articles from this issue
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K. NEGORO, M. USIYAMA1937 Volume 7 Issue 4 Pages 135-143
Published: 1937
Released on J-STAGE: December 11, 2009
JOURNAL FREE ACCESSUm die Hochmoor-Algenvegetation okologisch zu untersuchen, bestimmten wir im Juli 1937 als ein Standortfaktor die Wasserstoffionem-konzentration des Wassers an verschiedenen Stellen zweien Hochmoores, Yasimagahara und Odoriba, im Tafelland von Kirigamine, Nagano Prafektur, Japan. Die wichtigen Resultate der Messungen, die an Ort und Stelle mit der kolorimetrischen Methode vorgenomnlen wurden, sind wie folgt:
Die böchste aktuelle Azidität fanden wir bei dem gebundenen Wasser der in den zentralen Teile der Hochmoore liegenden Sphagnum-Bulten, dessen pH-Wert ja 3, 6 beträgt.
Das stagnierendes Wasser in den am Ufer der Teiche wachsenden Sphagnum-Rasen zeigte einen pH-Wert, welcher zwischen 3, 8 und 4, 1 schwankt.
In drei Teichen, die sich im Yasimagahara Hochmoor befinden, hat das Wasser etwas höhere pH-Werte, nämlich:
Yasimagaike........pH 4, 5 (am nordlichen Ufer 5, 0)
Onigasensui........pH 4, 6
Kamagaike..........pH 5, 0 (am westlichen Ufer 4, 5)
Die pH-Werte des an den Randgebieten der Hochmoore stehenden Tümpelwassers, welches vorwiegend aus dem Moor zu stammen scheint, liegen zwischen 3, 9 und 4, 2.View full abstractDownload PDF (404K) -
K. NEGORO1937 Volume 7 Issue 4 Pages 144-149
Published: 1937
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESSDer Verfasser hat die Planktonmaterialien aus einigen Seen in Hokkaido, welche von Dr. S. Yoshimura im Sominer 1936 gesam melt worden waren, untersucht und gefunden, dass in drei Seen die unterstehende Varietät von Aphanizornenon, flos-aquae die vorherrschenden Planktonorganismen darstellte:
Aphanizomenon, flos-aquae (L.) Ralfs var. Klebahnii Elenkin
Fundorte:Abasiri-ko, Ryosi-ko und Toro-ko (Kusiro).
Trichome meist zu Bundeln vereinigt. Zellen 3, 3-4, 5μ breit, 3, 3-6, 7μ lang, mit Gasvakuolen. Heterocysten zylindrisch, 4, 0-5, 7μ breit, 9-1lμ lang. Dauerzellen lang zylindrisch, Breite 4, 0-6.8μ, Länge 37-42μ.
Im Vergleich mit der typischen Art ist diese Varietat in marcher Hinsicht kleiner.
Soweit bisher hekannt, ist die Verbreitung von Aphanizomenon in Japan nur auf Hokkaido beschränkt.View full abstractDownload PDF (282K) -
Yuichi ITO1937 Volume 7 Issue 4 Pages 150-157
Published: 1937
Released on J-STAGE: December 11, 2009
JOURNAL FREE ACCESSThe Yufuin hot-spring is located at the foot of Mt. Yufu (450-500m above the sea) in Oita Prefecture. In the vicinity of this spring, there are many hot-springs, namely, Takemoto, Yunotsuho, Tanakaichi, Hachiyama and Ishimatsu, all of which belong to the simple carbonate springs. I found the following animals in both Takemoto and Yunotsubo on May 13th and 14th, 1937:
Takemoto I: 37.5°C, pH 7.25……………Stenothyra sp.
Takemoto II: 34.5°C, pH 7.2……………Aplocheilus latipes (Temminck & Schlegel), Phoxinus steindachneri Sauvage.
Takemoto III: 30-35.2°C, pH. 7.25…Caridina denticulate de Haan, Sernisudcospira libertina Gould.
Takemoto IV: 45.8°C, pH 7.4……………Laccobius sp.
Yunotsubo I: 40.2°C, pH 7.7……………Gerris lacustris (Linné)
Yunotsuho II: 32.37°C, pH 8.5-8.75…Rana, japonica Günther, (tadpole), Aplocheilus latipes, Stratiomyia. japonica Van der Wulp (larva), Gerris lacustris, Lycosa pseudoannulata (Roesenberg & Strand), Lymnaea japonica Jay and Stenothyra sp.
Rana, Laccobius, Stratiornyia and Lymnaea are commonly found in hot-springs, while Caridina and Stenothyra occur rarely. During the present study too Caridina are found in the limited thermal pools. It is very peculiar that many kinds of animals are found in alkaline springs at 1 unotsubo, as in the case reported by Brues (1932) that the insects usually occur in alkaline thermal waters, the pH-values of which range from 8.0 to 8.5.View full abstractDownload PDF (7120K) -
I. Potamoplankton of the Yosino RiverSyuiti MORI1937 Volume 7 Issue 4 Pages 158-172
Published: 1937
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESS1. The vertical distribution of the physical and chemical properties of the water and of the plankton organisms in the fresh water area of the Yosino river was investigated at Daizyu and Ikeda (see Fig. 1, 4, and 5). From the results indicated in Tables 4-7 and Fig. 6, it will be seen that there are no vertical stratifications in the physical and chemical conditions, whereas a greater number of plankters, both as to species and to individuals, are found in the deep rather than in the shallow water.
2. Investigation of plankton. was made at the 4 stations of the brackish water area, i. e., Simosuketo, Yosinogawa Bridge, Nakahara, and Nisiyosinari (see Fig. 1, 7, 8; and 10). The results are given in Tables 8-14 and Fig. 9.
3. At Simosuket6, the number of plankton organisms as well as the physical and chemical conditions of the water seem to vary with tidal fluctuations; the plankters were most abundant at high tide both as to quality and quantity, the greatest content of chlorine being also observed at that time. At low tide the chlorine content was the smallest, but the number of plankters reached its minimum somewhat later.
4. The vertical distribution of the environmental factors and of the plankton at the brackish water area veers examined at Nisiyosinari, but, owing to the heavy flooding at that time, no distinct vertical stratification was observed.View full abstractDownload PDF (5957K) -
K. IMANISHI1937 Volume 7 Issue 4 Pages 173-183
Published: 1937
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESS -
1937 Volume 7 Issue 4 Pages 184-190
Published: 1937
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESSDownload PDF (338K)
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