论城市生态系统特征及其平衡的调控

从城市生态系统分析入手，阐述了城市生态系统内涵、特征及其平衡的基本原理，在参考国内外相关资料基础上探讨城市生态系统的规律，指出城市生态系统是高度人工化的脆弱生态系统．其所需的物质循环、能量循环，乃至粮食供应都需要依赖外地补给，应变能力差。人类应当研究城市生态系统的特征，并运用科学的理念，防止城市生态系统失调，以至建立新的生态平衡，创造出良好的人居环境。并且有针对性地探讨了城市生态系统的平衡及其调控机制。

Character and Balance Control of Urban Ecosystem

Beginning from analyzing city ecosystem, the article discusses connotation, character and balance principle of city ecosystem. On the basis of consulting both domestic and overseas materials data, the rule of city ecosystem is analyzed. So it concludes that city ecosystem is got-up and brittle ecosystem, the substance and energy circle as well as provision of city ecosystem depend on other places. Therefore city ecosystem has a lower capability when it meets an emergency. Human being should research the character of city ecosystem, prevent disjustment of city ecosystem, and set up new balance, create good living environment by using science theory.The paper also discusses the balance and the control mechanism of city ecosystem.