The researchers studied how different types of plants and soil conditions are related in a burned area of the Great Xing′an Mountains. They found that the biodiversity of plants varied among different stands, with Pinus sylvestris var. mongolica plantation having the lowest biodiversity. The soil properties also varied, with this plantation being in the poorest condition. The biodiversity was closely linked to the soil environment in all stands, showing different correlations. The Shannorr—Wiener index, evenness index, and species richness index were closely related to soil bulk density in some stands, while non-capillary porosity was important in others. Available phosphorus was also linked to biodiversity in most stands, except for one.