球磨川流域の水田の鼓藻類について
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概要
- 論文の詳細を見る
1. The marine alluvial lowland of the Yatsushiro Plain, the fresh water alluvial land of the Hitoyoshi Basin and the fresh water diluvial upland of the same basin were compared with each other with regard to the distribution of desmids in the rice-fields situated along the course of Kuma River. The water temperature, the pH-value, and the Cland Ca-contens were measured at the four stations respectively. 2. One hundred and three species of desmids are listed in Table 2. Among them cosmarian species are dominant in general. As the fields are cultivated on the marine deposit and water is rich in calcium, desmidian components of the alluvial lowland are scanty ; they are represented by Cosmarium-Closterium. In the basin, however, the desmidian components become considerably rich from the alluvial lowland to the diluvial upland and are represented by Cosmarium in the former, Cosmarium-Euastrum in the latter. The most luxuriant production of desmids is found in the diluvial upland, where the pH-value tends to be lower than the other districts. 3. PUKE explained the abundance of desmids in the upland by the difference of the altitude, and this agrees with WEST's opinion that desmids are more abundant in geologically older land than in the younger one, but it is difficult to determine the difference of water-age in the rice-field. As the organic substance is also especially rich, most cosmarian species are small in size in the lowland. In the basin regions, however, they become abundant and of large size type species of the genus.
- 日本生態学会の論文
- 1963-06-01