大型土壌動物が森林のリン循環に及ぼす影響についての実験的解析

概要

論文の詳細を見る
The effect of soil-macrofauna on the phosphorus cycle was studied in a Japanese red pine forest in Fuchu-cho, Hiroshima Pref. The cylindrical vessels, filled with A_0 layer and mineral soil as they had been in the field, were set in the forest floor, and different densities of isopod Sphaerillo spp. were confined in the vessels in April 1987. The vessels were recovered in September and December 1987,and March 1988,and soluble and total phosphorus contents of A_0 layer and mineral soil were analyzed. The surviving Sphaerillo spp. in the vessels had decreased with time. This decreasing process depended on their density, and finally the number of individuals in the vessel became nearly equal between different initial densities. It appears that the soil vessel method used in this study is suitable for the experimentation of decomposition and feeding of soil animals over a long period. The more the cumulative fresh weight index (total fresh weight×experimental duration) of Sphaerillo spp. become in a vessel, the less the leaf litter, and soluble and total phosphorus remained in L layer. Thus the significant effects of Sphaerillo spp. on the phosphorus cycle in the L layer were quantitatively confirmed, but the effects in the F+H layers and mineral soil layer were obscure owing to the background concentration of phosphorus.
日本生態学会の論文
1992-04-10