基于MSPA与MCR模型的景观生态网络构建与优化——以陕西省宝鸡市为例

Construction and Optimization of Landscape Ecological Network Based on MSPA and MCR Models——A Case Study of Baoji City,Shaanxi Province

人类活动使得原有的土地利用结构、生态系统功能以及生态格局发生了巨大的改变,不断开发利用土地,扩张城市边界以及一味地追求经济发展等行为已经严重影响生态平衡及生态区域稳定性。利用宝鸡市土地利用数据,结合MSPA模型、MCR模型及电路理论等模型及方法,对研究区域内生态网络进行构建与优化。结果表明,识别生态源地26个,主要分布在宝鸡市东北部、西部和南部的林地地区,其中,确定核心生态源地2个,均位于秦岭自然保护区之中的山地区域;识别出生态廊道67条,可以帮助生态系统服务功能的恢复;根据最小累积阻力值构建5级生态缓冲区,提高生态环境质量。依据最终成果结论,提出具有建设性的生态网络优化措施,能够更有效地提高生态环境质量以及生态区域安全。

Human activities have greatly changed the original land use structure,ecosystem functions and ecological pattern.The continuous development and utilization of land,the expansion of urban boundaries and the blind pursuit of economic development have seriously affected the ecological balance and the stability of ecological regions.In this paper,land use data of Baoji city,combined with models and methods such as MSPA model,MCR model and circuit theory,were used to construct and optimize the ecological network in the study area.The results showed that 26 ecological source areas were identified,mainly distributed in the forest areas in the northeast,west and south of Baoji city,and 2 core ecological source areas were identified,all of which were located in the mountainous area of Qinling Nature Reserve.The identification of 67 ecological corridors can help restore ecosystem service functions;Construct a 5-level ecological buffer zone according to the minimum cumulative resistance value to improve the quality of ecological environment.According to the conclusion of the final results,the constructive ecological network optimization measures are put forward,which can improve the ecological environment quality and ecological regional security more effectively.