[Species-abundance distribution patterns of var. forest in Taibai Mountain, China].

The statistical model (log-normal model), niche models (Zipf model, broken stick mo-del, niche preemption model), and neutral model were used to fit the species-abundance distribution patterns based on the measurements of environmental factors and inventory data of trees with DBH≥1 cm in a 1.5 hm plot in the primary forest (PF) and a 1.5 hm plot in the secondary forest (SF).