基于MCR模型的天府新区生态廊道构建

Construction of Ecological Corridor in Tianfu New District Based on MCR Model

生态廊道可以提高源地间景观连接度,提升生态系统质量与稳定性。选取成都片区的天府新区为研究区域,研究根据形态学空间格局分析和景观连通性分析,选择生态功能重要的斑块为生态源地,运用最小累积阻力模型构建潜在生态廊道,并引入重力模型对生态廊道重要性进行评价。结果表明:(1)通过MSPA分析得出,核心区景观类型在所有景观类型中占比最大,达58.74%;(2)识别出的14块生态源地集中分布在东部龙泉山区和中部的水体保护区,需重要保护的源地斑块为10号、12-14号;(3)共构建91条生态廊道,总长度为776.19 km^(2),面积为116.22 km^(2),定量分析了多斑块间物种迁徙所消耗的最小成本;(4)引用重力模型分析了源地间生态廊道的重要性,得出6号和7号源地间相互作用值最高,两地间的生态廊道应重点保护,林地在生态廊道中占比最高,表明生态廊道总体稳定性较好。

Ecological corridor can improve the landscape connectivity between source areas,which is of great significance to enhance the quality and stability of ecosystem.Taking Tianfu New District in Chengdu as the research area,according to the morphological spatial pattern analysis and landscape connectivity analysis,patches with important ecological functions were selected as the ecological source,the potential ecological corridors were constructed by using the minimum cumulative resistance model,and the gravity model was introduced to evaluate the importance of the ecological corridor.The results showed that:1)MSPA analysis revealed that the core landscape types accounted for the largest proportion of all landscape types,up to 58.74%;2)A total of 14 ecological source patches had been identified,which were mainly distributed in the Longquan Mountain areas in the east and the water conservation areas in the middle.The patches in the source areas that need important protection were No.10 and No.12-14;3)A total of 91 ecological corridors with a total length of 776.19 km and an area of 116.22 km^(2)were constructed,and the minimum cost consumed by species migration among multiple patches was quantitatively analyzed.4)The gravity model was used to analyze the importance of the ecological corridor between the source areas,and the results showed that the interaction value between No.6 and No.7 source areas were the highest,and the ecological corridor between the two areas should be mainly protected,with woodland accounting for the highest proportion among the ecological corridors,indicating that the overall stability of the ecological corridor was good.