A Study On Biomass Pattern Of Forest Species In North China

Forest biomass accounts for about 90 percent of global terrestrial vegetation biomass. The pattern of forest biomass reflects a combination of the effects of species evolution, vegetation succession, human activities, natural disturbance and environmental pollution, and serves as an important measure of the structure and function of terrestrial ecosystems. This pattern is of great value to the carbon balance in global ecosystems, and also lays a foundation for forestry and ecological researches. On the basis of a collection of forests inventory in North China, this thesis, focusing on main species of Larix, Betula, Abies, Picea, Quercus and Pinus, analyses statistically the average volume of forests, studies the partterns of the volume, height, DBH and Volume-Biomass of forests during self-thinning, and simulates the Power Exponent Model and Linear Model on the overground biomass pattern of forests, involving an analysis of the precision of the two models and the essential relation between them. Therefore, this thesis explores the method and theoretical basis for analysing the patterns of forests'height, DBH and biomass based on forests' volume.