Abstract:

Abstract：We selected five representative regions in different latitude of cultivated black soil regions in sonnen plain, in order to reveal the differences of ecological environment, and the effects of the differences on the fauna composition. All work were done in May, August and October in 2009, and 2242 macro-soil animals of 41 classes and 15050 mid-micro soil animals of 491 classes were captured, which were subordinate to 57 families, 22 orders, 7 classes in 3 phylum. The results showed that individual and group number of the soil animals varied greatly in horizontal distribution of different regions. Macro-soil animals and mid-micro soil animals in Hailun was dominant, not only in individual number but also in group number, and the least was in nenjiang. The vertical distribution showed that mid-micro soil animals mainly lived in the topsoil layer, not like macro-soil animals, but compared with those lived in forest soil, the phenomenon was not apparent. The diversity index of macro-soil animals was Nenjiang > Yi’an > Hailun >Hulan >Suihua, and that in mid-micro soil animals was Hailun> Hulan> Suihua> Nenjiang > Yi’an.