落葉広葉樹林内の斜面における大型土壌動物について : 1.2種の陸棲等脚類 : Ligidium japonicum及びL.paulumについて
1977 年 27 巻 3 号 p. 201-206
詳細
1977 年 27 巻 3 号 p. 201-206
TSUKAMOTO, Jiro (Lab. Forest Ecol., Fac. Agr., Kyoto Univ., Kyoto). 1977. Soil macro-animals on a slope in a deciduous broad-leaved forest. I. Two species of terrestrial Isopoda : Ligidium japonicum and L. paulum. Jap. J. Ecol., 00 : 201-206. The forest floors of two plots set up at different locations on a slope, on the ridge and at the bottom, provided different conditions in several aspects, such as moisture, nutrition and physical structure. Two species of Ligidium, terrestrial Isopoda, showed different responses to these differences. Ligidium paulum colonized only the bottom plot, while Ligidium japonicum colonized both the plots on the slope, but the growth rate of the individuals of the species differed between the plots. The individuals from the bottom population grew more rapidly, and finally attained larger body weights than those from the ridge population. The distributions of these species on the slope seemed to be influenced by the difference in the physical structure of the A_0-layer and the top soil between the plots. The difference in the growth rate of the individuals of L. japonicum seemed to be caused mainly by the difference in the moisture conditions and the nutritional conditions of the forest floor.
