基于生态系统服务多情景权衡的生态安全格局构建——以大连市瓦房店为例

以辽宁省瓦房店市为研究单元,在评估2000年与2014年的食物供给、NPP、产水量及土壤保持四种典型生态系统服务基础上,引入OWA模型,模拟出研究区2014年生态系统服务优先保护区作为生态源地;利用最小累积阻力模型识别生态廊道与缓冲区,构建研究区生态安全格局。研究表明:（1）2000-2014年,瓦房店市生态系统服务时空变化显著,除产水量外,其他生态系统服务均有所增强。（2）综合考虑生态系统服务保护效率（E_i>1）与权衡度（0.68）,选取情景5下的优先保护区作为瓦房店的生态源地。（3）瓦房店生态源地面积为564.92 km²;生态廊道总长度为642.62 km,一级廊道（220.76 km）纵贯南北,次级廊道（421.86 km）呈网状连通分布离散的生态源地。研究结果可为瓦房店市生态系统可持续管理和土地利用优化提供决策支持。

Ecological security pattern construction based on multi-scenario trade-off of ecosystem services: A case study of Wafangdian,Dalian

Taking Wafangdian county in Liaoning province as the research unit, on the basis of the evaluation of the four typical ecosystem services, including food supply, NPP, water yield and soil conservation in 2000 and 2014, OWA model was introduced to simulate the priority conversation areas of ecosystem services in the study area in 2014 as the ecological source. The MCR model was used to identify the ecological corridor and buffer zone, and the ecological security pattern of the study area was constructed. The results show that: (1) From 2000 to 2014, the spatial and temporal changes of ecosystem services in Wafangdian were significant. Except for water yield, other ecosystem services had been enhanced. (2) Considering the efficiency of ecosystem services protection (E_i>1) and trade-off degree (0.68), the priority conservation areas under scenario 5 were selected as the ecological source of Wafangdian. (3) The ecological source area of Wafangdian was 564.92 km², which is distributed throughout the region; the total length of ecological corridors was 642.62 km, the first level corridors (220.76 km) ran through the north and south of the study area, and the secondary corridors (421.86 km) connected the dispersed ecological sources with net-like distribution. The results can provide decisive supports for sustainable ecosystem management and land use optimization in Wafangdian.