Abstract: Study of temporal-spatial evolution and factors of regional ecological security can provide references in constructing regional ecological security pattern. This paper, based on a case study on Jiangxi province as a demonstrating ecological cultural area, uses DPSIR model to establish an evaluation index system of ecological security, and applies improved TOPSIS to study the temporal-spatial evolution of Jiangxi's 2006 to 2018 ecological security with obstacle model used for factors. Coupling coordination model is employed to analyze their connection between two sub-systems of ecological security system with optimized path presented. Jiangxi's ecological security level is generally rising from 0.436 in 2006 to 0.464 in 2018 by a yearly rate at 0.002 2, but with gaps in comprehensive compactness and hierarchy among cities. Its response, driving forces and factors sub-systems are climbing with driving forces at same pace with temporal sequence, a falling pressure and status sub-systems. Any two sub-systems have a coupling degree over 0.97, suggesting a high coordination and a well coupling degree. Ecological security hierarchy varies largely among cities, most at critical security levels (III), with gap to the general security level (IV), and long time to the security level (V). Jiangxi's ecological security level is jointly confined by scientific expense, per capita water resource, regional GDP, urbanization rate, green and square area, waste water & gas processing capacity, fixed asset investment proportion and per capita GDP. This paper presents approaches to regional ecological security level on boosting policies response, improving production performance, pushing regional industrial optimization and intensifying eco-environmental protection. 

Key words: ecological security, DPSIR-TOPSIS model, obstacle model, ecological cultural demonstrating area, Jiangxi province

摘要： 【研究目的】客观识别与评价区域生态安全时空演化特征并诊断其影响因素，为区域生态安全格局构建提供参考。【研究方法】以生态文明示范区江西省为研究对象，基于DPSIR模型框架构建生态安全评价指标体系，采用改进的TOPSIS法评价研究2006—2018年生态安全时空演化特征，结合障碍模型分析其影响因素，并采用耦合协调度模型对生态安全子系统两两之间的关系进行分析，基于评价及诊断结果提出优化路径。【研究结果】1）江西省生态安全水平总体呈上升趋势，从2006年的0.436增加到2018年的0.464，年均增加0.002 2，但各地市生态安全综合贴近度和生态安全等级差距较大；2）生态安全响应子系统、驱动力子系统与影响子系统均呈现上升趋势，且驱动力与影响时间序列变化步调一致性较为明显，而压力子系统和状态子系统生态安全水平均下降，且生态安全子系统两两之间耦合度均大于0.97，处于高度协调程度，说明在子系统相互影响过程中良性耦合程度较高；3）各地市生态安全等级差距较大，介于临界安全等级（III）较多，距离基本安全等级（IV）状态仍有较大差距，达到安全状态等级（V）仍需较长时间；4）江西省生态安全水平受到科学技术支出、人均水资源量、地区生产总值、城镇化率、绿地与广场用地面积、废水废气治理设施处理能力、固定资产投资比重和人均GDP等因素综合影响。【研究结论】通过强化生态环境经济政策响应，提高生产领域环境绩效，推动区域产业优化和促进生态环境保护，有助于提高区域生态安全水平。

关键词: 生态安全, DPSIR-TOPSIS模型, 障碍模型, 生态文明示范区, 江西省