| Abstract: | The paper studies ten major tree species occupying the space in natural secondary forests in Mao Er mountain area. The space is divided into horizon, elevation, slope, aspect and topographic position layer. The features of the species of trees are examined using the concept of distribution width and the method of space statistics. The conclusions of analysis indicate that Aspen and Asian White Birch community of forests in the area would become failing, and the distribution of Mongolian Oak and Mongolian Liden and Manchurian Walnut are Limited by the slope and aspect and topographic position. Elm, Maple, Manchurian Ash would become the major species constituting natural secondary forests in future in this area. |
