Zhang Fuqing,Wei Xiaojian,Xie Mingrui,et al.Multi-scale Nesting Analysis of Ecological Network in Nanchang City Based on Comprehensive Sources Identification[J].Research of Soil and Water Conservation,2024,31(04):408-418.[doi:10.13869/j.cnki.rswc.2024.04.020]
基于不同尺度源地综合识别的南昌市生态网络嵌套分析
- Title:
- Multi-scale Nesting Analysis of Ecological Network in Nanchang City Based on Comprehensive Sources Identification
- 文章编号:
- 1005-3409(2024)04-0408-11
- Keywords:
- ecological network; multi-scale; ecological source identification; nested analysis; Nanchang City
- 分类号:
- X321
- 文献标志码:
- A
- 摘要:
- [目的]探究南昌市和环南昌城市圈两个尺度下生态网络的空间结构与尺度嵌套特征,以期为区域生态安全保护提供参考。[方法]以环南昌城市圈为研究区,分南昌市和环南昌城市圈两个尺度,基于“功能-属性-结构”源地综合识别框架提取源地,通过MCR模型构建生态网络,并对两个尺度的廊道、生态夹点与障碍点进行了嵌套分析。[结果](1)南昌市的综合生态系统服务显著低于环南昌城市圈,两个尺度在前35%的综合生态系统服务有显著的断层,结合结构与属性特征,在南昌市尺度提取生态源地56个,源地分布存在东西较为割裂的特征,而在环南昌市尺度提取生态源地78个,源地空间分布较为均匀;(2)南昌市尺度下构建生态廊道77条,连接南昌市东西源地的廊道脆弱,环南昌城市圈尺度构建生态廊道310条,其中用于连接南昌市与周边县区生态源地的廊道29条,南昌市与周边县区的生态源地有较强的交互与联系;(3)南昌市和环南昌城市圈两个不同尺度的生态过程紧密相关,两个尺度下重叠廊道26条,共计611.78 km,重叠生态夹点4个,重叠障碍点8个,生态夹点在南昌市西北部和东部差异明显,障碍点在南昌市东北部和西南部存在较为明显的差异。[结论]南昌市生态网络具有一定的稳定性,两个尺度重叠的生态网络的廊道、生态夹点和障碍点较多,是生态保护与修复的关键,对重叠要素进行修复可强化城市东西两侧的生态网络连接,有利于维护城市整体生态网络安全与稳定。
- Abstract:
- [Objective]The aims of this study are to investigate the spatial configuration and scale nesting characteristics of ecological networks under the two scales of Nanchang City and Nanchang City Circle, and to provide reference for regional ecological security protection. [Methods]Nanchang City Circle was taken as the research area. Based on the comprehensive sources identification framework of ‘Function-Attribute-Structure', the ecological sources were extracted under the two scales of Nanchang City and Nanchang City Circle, and the ecological network was constructed by the Minimum Cumulative Resistance(MCR)model. Simultaneously, nested analysis of ecological corridors, ecological pinch points, and barrier points at two scales were conducted to identify similarities and differences across different scales. [Results](1)The comprehensive ecosystem services in Nanchang City were significantly lower than those in the Nanchang City Circle. There were significant faults in the top 35% of the comprehensive ecosystem services at the two scales. Combined with the structure and attribute characteristics, 56 ecological sources were extracted at the scale of Nanchang City, and the distribution of the ecological sources was more fragmented from the east to the west, while 78 ecological sources were extracted at the scale of Nanchang City Circle, and the spatial distribution of the ecological sources was more uniform.(2)At the scale of Nanchang City, 77 ecological corridors were constructed, and the corridors connecting the east and west sources of Nanchang City were fragile. At the scale of Nanchang City Circle, 310 ecological corridors were constructed, of which 29 were used to connect the ecological sources of Nanchang City and surrounding counties and districts. The ecological sources in Nanchang City and those in surrounding counties and districts of Nanchang City had strong interaction and connection.(3)The ecological processes of two different scales in Nanchang City and Nanchang City Circle were closely related. There were 26 overlapping corridors under the two scales, a total of 611.78 km, 4 overlapping ecological pinch points and 8 overlapping barrier points. The ecological pinch points were significantly different in the northwest and east of Nanchang City, and the barrier points were significantly different in the northeast and southwest of Nanchang City. [Conclusion]Nanchang's ecological network is relatively stable. There are many overlapping features of corridors, ecological pinch points, and barrier points in the ecological network at two scales, and they are essential for ecological conservation and restoration. The repair of overlapping elements can increase the link of the ecological network on the east and west sides of the city, as well as help to maintain the general safety and stability of the city's ecosystem.
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备注/Memo
收稿日期:2023-09-13 修回日期:2023-10-04
资助项目:自然资源部大湖流域国土空间生态保护修复工程技术创新中心开放课题基金(JXYJY2023006); 国家自然科学基金(42377472,42174055,52168010); 江西省自然资源科技创新项目(ZRKJ20232406)
第一作者:张福庆(1967—),男,江西余干人,博士,教授,主要从事生态评价研究。E-mail:631000872@qq.com
通信作者:危小建(1988—),男,江西南昌人,博士,副教授,主要从事城市景观生态变化研究。E-mail:weixiaojian1988@ecut.edu.cn