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The removal of understory vegetation has been a common forest management practice, especially in plantations, but the effects of understory removal on soil physico-chemical properties and decomposer organisms is poorly known. In the present study, the effects of understory vegetation removal and removal of all-plants (i.e. removal of understory vegetation and trees) on soil properties and soil biota were measured in a plantation of mixed native tree species in southern China. During the wet season, understory vegetation removal did not cause significant changes on soil microbial community and major soil faunal groups except for a marked reduction in the density of herbivorous nematodes. However, all-plants removal significantly decreased the fungal biomass, the fungal:bacterial ratio, the density of herbivorous nematodes, the structure of the nematode community, and the density of mites, collembola and …