摘要
从生态力学角度对生态系统退化进行了初步探讨。文中认为,生态系统是一个具有三维空间的物质实体,它和一般物体一样,也具有运动的特性。生态退化实际上是生态系统从高水平的稳定状态向低水平的失衡状态转化的一种运动形式。任何生态系统都具有一定的生态质量和生态惯性,当生态系统遭受到自然和人为干扰的合力大于生态系统的内在生态阻抗力时,生态系统势必发生运动或"位移"。文中定义了生态质量指数、自然干扰指数、人类活动强度指数和生态退化潜势指数,以定量描述区域生态系统退化的潜势。
The degradation of ecosystems was discussed from a view of ecomechanics in thi s paperIt was suggested that any ecosystem could be regarded as a kind of the substance integration with threedimension spatial structure, and that it also had a property of 'movement' which referred to the displacement of the state, but not the c hange of the place of ecosystem Actually, the degradation of ecosystem was a p rocess of ecological movement from a high level or stable state to an imbalance state Any ecosystem had a certain ecomass and ecoinertia When the result ant of ecoforces produced by human and natural disturbance exceeded their inhe rent ecological resistance force, ecosystems would take movement or displacement This paper also presented a quantitative expression for calculating the poten tial of ecosystem degradation with four indices, including the ecomass index ( EMI), the natural disturbance index (NDI), the human activity intensity (HAI) an d the ecodegradation potential index (EDPI)
出处
《地理科学进展》
CSCD
北大核心
2003年第3期251-259,共9页
Progress in Geography
基金
国务院三峡建设委员会项目(1-03-03)
广东省自然科学基金项目(980148
010274)
中日美联合资助的"华南退化坡地绿色食品生产与生物多样性保护"项目的部分内容.
关键词
生态退化
生态力学
生态质量
生态阻抗
干扰
ecological degradation
eco-mechanics
eco-mass
eco-resi stance
disturbance
