基于景观生态风险评价的景观格局优化研究——以嘉陵江流域为例  

Optimization of Landscape Pattern Based on Landscape Ecological Risk Assessment:Taking Jialing River Basin as an Example

作　　者：杜华明[1] 屈波[1] DU Huaming;QU Bo(School of Resource and Environmental Engineering,Mianyang Teachers'College,Mianyang,Sichuan 621000)

机构地区：[1]绵阳师范学院资源环境工程学院,四川绵阳621000

出　　处：《绵阳师范学院学报》2024年第8期9-15,共7页Journal of Mianyang Teachers＇ College

基　　金：生态安全与保护四川省重点实验室开放基金项目(ESP1707);绵阳师范学院2020年线上线下混合式一流本科课程项目(Mnu-JY20268)。

摘　　要：为了促进嘉陵江流域生态系统的健康发展,采用空间主成分分析法、加权叠加分析法和最小累积阻力模型对流域景观生态风险进行了研究.结果表明:嘉陵江流域高与较高生态风险区主要位于嘉陵江流域上游局部地区,中、下游的西南部地区.遴选出22个生态源地、构建出15条生态廊道、辨识出17个生态节点,形成点—线—面多层次生态网络优化格局;对比嘉陵江流域景观格局优化前后的连通性指数发现,优化后的整体景观连通性提高了87.35%.建议该区域在今后的建设中,应加强生态源地的保护、生态廊道及生态节点的建设以形成稳定的、物种丰富的生态系统.In order to promote the healthy development of river basin ecosystem,the landscape ecological risk and landscape pattern optimization were analyzed by using methods of spatial principal component analysis,weighted superposition analysis and minimum cumulative resistance model.The results showed that:the proportion of lowest,lower,middle,higher and highest risk areas in Jialing River Basin is 11.64%,23.94%,28.19%,23.85%and 12.39%respectively.In the study,22 ecological sources were selected,15 ecological corridors were con-structed,17 ecological nodes were identified,and a multi-level ecological network was constructed.Comparing the connectivity index before and after the optimization of landscape pattern in Jialing River Basin,we found that the overall landscape connectivity after the optimization improved by 87.35%.

关 键 词：景观生态风险 空间主成分分析法 最小累积阻力模型 景观格局优化 嘉陵江流域 

分 类 号：X821[环境科学与工程—环境工程]