Feeding attributes of four species of Collembola in a pine forest soil

Seasonal changes in abundance and distribution pattern of soil micro-arthropods were studied in connection with a few environmental factors in a Japanese cedar (Cryptomeria japonica D. DON) plantation. The soil arthropods were sampled from three different depths at intervals of two months for two years. Of the collected animals (total 51000-155000 m-S), Collembola (20000-76000 m-S), oribatid mites (19000-55000 m -S) and carnivorous mites (6200-21000 m -S) were the numerically dominant animal groups. Low seasonal variations in abundance indicated their seasonal stability in population levels. The trends in seasonal fluctuation were similar among these groups and between the two years, showing bimodal pattern with little peaks in early summer and winter. The pattern of seasonal fluctuation in abundance of carnivorous mites (Pa) was significantly synchronized with that in the total abundance of Collembola and oribatid mites (Pr). Thus, the number~ratios (Pa/Pr) were fairly constant, ranging from 0.10 to 0.25.Seasonal changes in vertical distribution of the three animal groups showed a similar pattern for both years. The downward migrations were shown to be more affected by low temperatures in winter accompanied by snow coverage rather than by the desiccation of the surface soil in summer. All the three groups demonstrated as a whole slightly aggregated patterns of horizontal distribution throughout the two years. Temporal increases in the patchiness indices were observed from summer to autumn when the moisture content of the surface soil was low.

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Feeding attributes of four species of Collembola in a pine forest soil

Cited by 38 publications

References 18 publications

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Seasonal changes in abundance and spatial distribution of the soil arthropods in a Japanese cedar (Cryptomeria japonica D.Don) plantation, with special reference to collembola and acarina

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