不同时空尺度下,生态承载力系统耦合协调度呈现不同差异和变化。在阐述耦合协调发展作用机理的基础上,构建了耦合协调度评价指标体系,利用容量耦合模型对洞庭湖区生态承载力系统耦合协调度进行时空分析。结果表明:1时序变化上,2001~2012年洞庭湖区生态承载力系统耦合度和耦合协调度变化趋势基本趋同,大致呈现同步稳定上升态势,耦合度均值达0.499,处于拮抗阶段;耦合协调度均值达0.463,处于中度耦合协调阶段;年均增长率上,耦合度达3.35%,大于耦合协调度的3.05%。表明生态承载力内部系统耦合作用和协同效应明显,并且耦合作用的强度大于内部协调性。2空间分异上,17个县域的耦合度出现了低水平耦合、拮抗阶段和磨合阶段3种状态,3种耦合状态的县域个数和区间变化呈现不同的差异。耦合协调度出现了低度耦合协调、中度耦合协调和高度耦合协调3种状态,其变化状况基本上与耦合度类似,但从协调状态的县域个数和区间变化来看,耦合协调度的变化稍滞后于耦合度的变化,空间分布与耦合度分布特征基本相似,高、低值区的空间分布由西南向东北大致呈现较低-高-低-高-较低的"M"型基本格局。3空间组合上,17个县域出现了低耦合低协调区、中耦合低协调区、中耦合中协调区、高耦合中协调区和高
Ecological carrying capacity is a complex dynamic system including natural-economy-society, and its intrinsic coordination is the key to sustainable carrying capacity of ecosystem. In different spatio-temporal scales, the coupling coordinative degree of ecological carrying capacity presents different differences and changes. On the basis of coupling coordinative development interactive mechanism of ecological carrying ca-pacity, the article constructs an evaluation index system of coupling coordinative degree, and analyzes the tem-poral and spatial difference of coupling coordinative degree of ecological carrying capacity in the Dongting Lake region by using capacitive coupling model. The results show that:1) The trends of coupling degree and coupling coordinative degree of ecological carrying capacity in the Dongting Lake region from 2001 to 2012 seemed to be the same, and presented roughly steady upward trend. The mean of coupling degree was 0.499, in antagonistic stage; th