长株潭城市群城镇化水平与生态质量的冲突与交互作用

城镇化的快速发展给生态质量提升带来挑战，如何解决城镇化发展与生态质量提升之间的冲突是实现区域可持续发展的关键。通过构建城镇化与生态质量评价指标体系，运用耦合协调度模型(CCDM)和时空地理加权回归模型(GTWR)揭示2000—2020年长株潭城市群城镇化与生态质量的冲突程度，并对其交互作用的时空异质性进行测度。结果表明：(1)研究期间，长株潭城市群城镇化水平呈上升趋势，表现出中心地区高于四周的特征；生态质量呈现先降低后上升的趋势，并表现出四周高中心低的特征。(2)长株潭城市群城镇化水平与生态质量之间的冲突程度逐渐降低，经历了从城市化滞后到生态质量滞后的转变，并在空间上表现出由中部高四周低向北高南低过渡的特征。(3)城镇化水平与生态质量之间的交互作用表现出明显的阶段性特征，城镇化水平与生态质量的负向作用主要分布在中部发达地区，而正向作用主要分布在经济欠发达的四周区域。其中，人口和空间城镇化导致生态不断恶化，而生态功能的减弱以及结构的破碎化制约了城镇化的发展。

Conflict and interaction between urbanization level and ecological quality in Changsha-Zhuzhou-Xiangtan urban agglomeration

The rapid development of urbanization brings challenges to the improvement of ecological quality. Solving the conflict between urbanization development and ecological quality improvement is the key to realize regional sustainable development. By constructing the evaluation index system of urbanization and ecological quality, this paper uses the coupling coordination degree model (CCDM) and geographically and temporally weighted regression model (GTWR) to reveal the degree of conflict and measure the spatio-temporal heterogeneity of the interaction between urbanization and ecological quality in Changsha-Zhuzhou-Xiangtan urban agglomeration from 2000 to 2020. The results showed as follows:(1) During the study period, the urbanization level of Changsha-Zhuzhou-Xiangtan urban agglomeration presented an upward trend, showing the characteristics that the central region was higher than the surrounding areas. The ecological quality indicated a trend of decreasing first and then increasing, and showed the characteristics of high in the surrounding area and low in the center. (2) The conflict degree between urbanization level and ecological quality of Changsha-Zhuzhou-Xiangtan urban agglomeration was gradually reduced, which had experienced the transformation from urbanization lag to ecological quality lag, and showed the characteristics of transition from high in the center and low in the surrounding area to low in the north and high in the south. (3) The interaction between urbanization level and ecological quality showed obvious stage characteristics. The negative effect of urbanization level and ecological quality was mainly distributed in the central developed areas, and the positive effect was mainly distributed in the surrounding areas of underdeveloped economy. Among them, the urbanization of population and space aggravated the deterioration of the natural ecosystem, while the reduction of ecological function and the fragmentation of structure also restricted the development of urbanization.