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生态学杂志 ›› 1998, Vol. ›› Issue (5): 24-26,32.

• 研究报告 • 上一篇    下一篇

与生态系统的演化

张永泽1, 王烜 2   

  1. 1. 中国环境科学研究院环境工程中心, 北京100012;
    2. 北京师范大学环境科学研究所, 100875
  • 收稿日期:1997-09-23 修回日期:1997-12-16 出版日期:1998-10-10

Exergy and Evolution of Ecosystem

Zhang Yongze1, Wang Xuan2   

  1. 1. Environmental Engineering Center, Chinese Research Academy of Environmental Sciences, Beijing 100012;
    2. Environmental Scientific Research Institute, Beijing Normal University, 100875
  • Received:1997-09-23 Revised:1997-12-16 Online:1998-10-10

关键词: 下挖式日光温室, 土墙, 温度, 热流, 厚度

Abstract: The ecological meaning of the thermodynamic concept “Exergy” is discussed and the applications of the maximum exergy principle and Darwin's theory of “Survival of the fittest” in the evolution of ecosystem are explored. The study indicated that the ecosystem is to evolve to the direction, in which the exergy of ecosystem is increasing and the system will continuously select the species that can contribute most to the maintenance or even growth of the exergy of the system. The exergy has the following advantages compared with the other thermodynamic concepts: 1)It is an energy term which is easily interpreted; 2)Exergy is easily computed in the model;3)It is directly related to Darwin's theory and the application of exergy has therefore an ecological interpretation; and 4)It is dependent on the environment but is not a variable state as entropy. These advantages make the exergy to be better used in ecology.

Key words: sunken solar greenhouse, soil wall, temperature, heat flux, thickness.