Structure of Soil Animal Community of Oakery Litter and Fluctuation during Leaf Litter Decomposition

The soil animal community and its fluctuation during leaf litter decomposition was investigated with litterbag(5 mm,1 mm and 1/300 mm)method(from Apri.to Oct.,2002) in oakery(Quercus liaotungensis)forest and in mixed forest(oakery∶pine(Pinus tabulaeformis)= 2∶1)at Jiulongshan,Beijing.3 564 individuals were collected from 98 litterbags,belonging to 3 Phyla,10 Classes,19 Orders.Most of the dominant taxa were Hymenoptera,Psocoptera,Diptera,Collembola and Acariformes.Most were omnivores in the forest litter.The number of individual and group of meso-and microfauna in mixed forest were more than that in the oakery,while the macrofauna were less than that in the oakery,the number of individual and group were not significant at α=0.05 to two type forests.In the three kind of litterbags,the amount of the soil animal individual and group were in the order of 5 mm>1 mm>1/300 mm in pure oakery forest,while the amount of soil animal individual was 1 mm>5 mm>1/300 mm,and the group was 5 mm>1 mm>1/300 mm in mixed forest,and the amount of group reached the peak at Aug.or Sept.The diversity of the soil animal group was trending to increase;Soil animal community was more heterogeneous in different forest.The dominant taxa showed that they were not significant in correlated to the mass loss of the litter(r_s 0.05).The colonized duration of Acariformes and Psocoptera were 10.33 and 8.53 months at oakery,respectively,while that of Hymenoptera and Diptera were 9.48 and 7.91 months respectively in mixed forest.