关键词: 人工生命种群, 人工生态系统, 临界值, 平衡态, 失衡态

Abstract:

To find the principles of ecosystem evolution through artificial life technology,an artificial life population equivalent model is proposed.An artificial ecosystem based on artificial life population is created. The artificial ecosystem includes simulated climate,artificial ecological environment, artificial plant population,artificial herbivore population and artificial carnivore population from the bottom layer to the top layer.A large number of artificial ecosystem evolution experiments are conducted.The experimental results demonstrate that the time of maximum value turns short from the bottom layer to the top layer when the artificial ecosystem is balanced,but the value of per layer is not beyond the maximum value and less than the critical value.In balanced conditions,the artificial ecosystem keeps balanced if the simulated climate is higher than the critical value, and the artificial ecosystem does not keep balanced any more when any layer is under the critical value in any moment. In unbalanced conditions, the artificial ecosystem is irreversible except that the shortage of values is added to the critical value from the outside of the artificial ecosystem.The artificial ecosystem evolution research based on artificial life population corrects the flaw of the former ecosystem evolution research and finds the principles of ecosystem evolution,so it is a scientific approach to ecosystem evolution research.

Key words: artificial life population;artificial ecosystem;critical value;balanced condition;unbalanced condition