城市复合生态系统共生模型及应用研究

Research of Urban Compound Ecological System Symbiosis Model and Its Application

根据城市复合生态系统的特征将其分为自然生态子系统、经济生态子系统和社会生态子系统,绘制了城市复合生态系统结构图。以协同理论为基础,应用功效函数法建立了城市复合生态系统共生模型。通过沈阳城市复合生态系统序参量的确定、有序度的计算和共生度评估,分析了沈阳城市复合生态系统共生度及变化趋势。结果表明:1995-2009年,沈阳市复合生态系统生态共生水平总体上呈上升趋势,从2001年开始,步入协调发展状态,子系统间协同发展,相互促进;自然、经济生态子系统有序度,由11.97增长到112.02,上升趋势比较显著;经济、社会生态子系统有序度由61.56增长到84.08,呈现稳步上升趋势;社会、自然生态子系统有序度从56.88增长到69.17,呈缓步增长趋势。通过实证研究,证明该模型用于城市复合生态系统生态共生水平评估及变化趋势分析是科学、合理和可行的。

According to the characteristics of ecological system,the urban compound ecological system was divided into three subsystems such as the natural ecological subsystem,economic ecological subsystem and social ecological subsystem.The structure graph of urban compound ecosystem was drawn as well.Moreover,the ecosystem symbiosis model of urban compound ecological system was established with the synergetic theory and application of efficiency function.The compound ecological system symbiosis degrees and the development trend for Shenyang were analyzed by the methods of order parameter choice,order degrees calculation and symbiosis degrees assessment.The results showed that the compound ecosystem symbiosis degrees for Shenyang from 1995 to 2009 had increased,compound ecological system and its subsystems stepping into the coordinated development,synergetic development and mutual promotion respectively since 2001.Among the subsystems,the order degree of natural ecological subsystem was from 11.97 to 112.02,which increased significantly,and the order degree of economic ecological subsystem was from 61.56 to 84.08,which increased steadily.Meanwhile,the order degree of social ecological subsystem was from 56.88 to 69.17,which increased slowly.With the instance study,the model was proved to be scientific,reasonable and feasible,by which the ecosystem symbiosis level and development trend of urban compound ecological system were evaluated and analyzed.