The responses of the secondary deciduous broad-leaved mixed forests to global climate changes and elevated CO_2 were simulated by BKPF model.

Based on the photosynthetic data provided by some ecologic observation stations,the forest gap model was coupled by the meth.

Forest gap model is an individual-based forest model being used extensively in simulating and predicting the long-term dynamics of forest succession, and a useful tool for studying the potential responses of forest ecosystem to climate change.

The Proposed Model,forest gap model NEWCOP(Northeast China Woods Competition Occupation Processor),has been proved to be able to simulate distribution,growth and succession of forests in Xiao Hinggan Mountains.

In order to more accurately simulate the large-scale vegetation landscape based on the resource interaction, this paper analyses the forest gap model, and then extends the model to vegetation growth simulation, the environment factors are mapped into the plant growth function, builds the vegetation distribution control map according to the model.

In this thesis we develop our forest space-time distribution model based on the forest gap model by the environmental factors, especially the specific terrain situation.

A great variety of forest gap models have been used all over the world due to its parameters and flexible structure,which can facilitate researchers\' modification.

Six kinds of computerized forest dynamic being widely used at home and abroad are described including forest harvest model,ecological gap model,ecological compartment model,process model,vegetation distribution model and mixed model.