LAUSR

The soil fauna community characteristics of the lower Changbai Mountains were investigated, as well as their response to changes in environmental factors. Soil fauna from four habitats, including the secondary boreonemoral zone, secondary deciduous broad⁃leaf forest, Mongolia oak forest, and farmland in Changbai low⁃mountain area, were studied in the spring ( May), summer ( July) and fall ( September) of 2014. Overall, 30445 individuals were captured. These belonged to 3 phyla, 6 classes, 22 orders, and 52 families. The soil fauna density and their group numbers differed among the habitats with seasonal fluctuations. The structure of the farmland soil fauna community was the simplest among all habitats. Seasonal fluctuations of macro⁃fauna density were high. For micro⁃fauna, both the seasonal fluctuation in density and group numbers were high. The biodiversity analyses showed that in these biotopes, the soil fauna community in the