摘要
城市生态系统中总体资产组成、结构及其价值动态是城市生态经济研究的重要论题,综合探讨城市总体资产与城市发展之间的相互作用格局将有助于逐步揭示城市发展的生态经济运行机制。剖析了总体资产定义及其价值含义,分析总体资产构成与结构;以北京城市生态系统为例,采用能值方法分析北京城市总体资产年际变化动态,进一步探讨了城市发展与总体资产的相互关系。结果表明,北京城市总体资产动态呈现几方面的特点:(1)总体资产规模大,其规模与密度随城市发展而逐年增长;(2)资产组成多样,价值形态复杂,人造与人类资产已成为总体资产价值的主体(人造资产比重已超过总量的60%,生态资产比重小,已低于总量的10%),并随城市发展而增长;(3)资产流通量大,对外部依赖性强,其净流通系数随城市发展而逐年增长;(4)总体资产构成随着城市发展呈现明显的极化趋势,棕化不断加剧,绿化逐年降低;(5)生态资产规模呈不稳定波动状态,尽管更新率总体稍有上升,但自给率、净流通率仍然在下降,净损失率也呈现不稳定变化,其资产规模总体趋势于下降,并由积累态转变为耗散态,已成为总体资产价值构成中的脆弱或敏感要素;(6)自然资产的产出系数与收入系数均随城市发展而逐年增长。
City＇s gross assets are an important eco-economic issue for city development, and the integrated research on relationships between gross assets and city development greatly helps to understand diversified and complicated mechanisms of their interactions and promote sustainable management of city＇s wealth. In this paper, the authors explore the definition of gross assets and its connotation of value, and discuss the constitution of gross assets ; taking Beijing as an example, the authors further analyze the dynamics of gross assets and its relations to urban development in Beijing city.
From the results of research, the dynamics of gross assets in Beijing city have the following characteristics ： （1） the size of gross assets is large and increases as the city develops, so does the density of gross assets; （2） the amount of throughput is great and has high dependence on the outside of the city, its net exchange coefficient rises as the city develops; （3） the constitution of gross assets becomes polarized as the city develops, asset browning increases and greening decreases; （4） although the regeneration rate of ecological assets in gross assets rose slightly, self-supporting rate and net exchange rate of ecological assets decreased, and the size of ecological assets went down slowly; （6） In gross assets, the coefficients of output and revenue of natural asset increases as the city develops.
出处
《生态学报》
CAS
CSCD
北大核心
2006年第7期2207-2218,共12页
Acta Ecologica Sinica
基金
国家自然科学基金资助项目(7057310670433001)
中国科学院知识创新工程资助项目(KZCX3-SW-424KZCX2-SW-318-01-02)
国家重点基础研究发展计划资助项目(2005CB724206)~~
关键词
总体资产
生态资产
环境资产
价值构成
城市发展
北京
gross assets
ecological asset
environmental asset
value distribution of gross assets
urban development
Beijing City
