关键词: 重庆四面山, 常绿阔叶林, 种子雨, 种子库

Abstract: This paper gives a tentative analysis of the function of information in organizations of ecological systems and the relationship between information flows and matter-energy flows within them,and thus,introduces the concept of“quality factor of energy”.On this basis,the writer expresses his view of the rational utilization of energy and ecological engineering.

Key words: Chongqing Simian Mountain, Evergreen broadleaved forest, Seed rain, Seed bank