【摘要】 生态安全和生态安全格局是区域生态保护研究的热点议题，沿海山区由于降水量较大、地形复杂以及受频繁台风影响，输电线路工程建设是否影响区域生态安全？本文以福建棠园输电工程区域为例，以区域生态安全格局即生态“源地-廊道-节点”为研究对象，应用MSPA、景观连通性指数、MCR和重力模型，研究福建棠园输电工程施工前、施工中和施工后区域及线路2km生态评价区的生态安全格局变化，讨论输电工程建设的生态安全影响，获得输电工程的生态安全重点保护区。结果表明：在区域尺度上，输电线路施工前、施工中和施工后生态源地面积占区域面积分别为14.21%、11.79%和14.11%，重要生态廊道分别为20、21和16条，生态节点分别有168、123和227个；在生态评价区（即输电线路2km生态影响区），输电线路施工前、施工中和施工后生态源地面积分别为39.78 km~2、27.44 km~2和29.88 km~2，生态廊道总长分别为50.78 km、44.36 km和67.18 km，生态节点分别有13、7和25个；在区域和生态评价区两个尺度，输电线路施工期内，生态安全格局空间发生位移，生态“源地-廊道”数量减少，施工后逐步恢复。输电线路工程的生态安全影响主要发生在线路两侧向外各延伸2km的生态评价区。研究结果为线性工程项目的生态评价提供参考，也为输电线路建设的生态安全保护提供了切实科学指导。更多还原

【Abstract】 Ecological security and its patterns are hot topics for regional ecological protection. In the subtropical coast mountainous area with high precipitation, complex topography, and frequent typhoons, does the construction of a Power Transmission Line(PTL) affect local ecological security? Taking Fujian Tangyuan PTL as an example,this study examined changes in the Ecological Security Pattern(ESP) at regional and local scales by using Morphological Spatial Pattern Analysis(MSPA), Minimum Cumulative Resistance(MCR) and the Gravity model. The results showed that within the PTL timelines(before, during and after building the PTL), the ecological source area occupied 14.21%, 11.79% and 14.11% of the whole research region; while the important eco-corridors numbered 20, 21 and 16, respectively; and the eco-nodes numbered 168, 123 and 227, respectively. At the local scale, in the PTL buffer space(2 km from the PTL on either side, i.e., the potential ecological impact zone) within the timelines(before-during-after building the PTL), the ecological source area occupied 39.78 km~2, 27.44 km~2 and 29.88 km~2,respectively, and the eco-corridor lengths were 50.78 km, 44.36 km and 67.18 km with 13, 7 and 25 eco-nodes,respectively. Clearly, during the building of the PTL, the ecological “source-corridor” decreased at first and gradually recovered after the construction, while the challenge to the ecological safety from the PTL occurred at the local scale. The results of this study provide a method for evaluating the ecological integrity disturbance by linear projects and scientific protection strategies are proposed.更多还原