摘要
最小累积阻力(MCR)模型是量化生态安全格局的方法,但模型的尺度问题在空间研究和实践中一直得不到重视.以蚌埠市天河片区为例,拟在不同尺度对区域生态安全格局进行探究.根据片区内生态源S1、S2和S3和生态阻力格局,首先在粒度10、30、60m和100m下进行现状研究,基于MCR模型得出生态源之间辐射廊道和由累计阻力(cr)构成的联系功能矩阵;再对规划方案进行类似操作.为评价规划对现状各尺度生命过程的影响,分别以Kappa指数和cr相对变化量揭示规划后廊道格局和源间联系功能的变化.结论:在各生态源之间,方案在100m粒度下对原先生命过程促进最大,且S2和S3、S1和S3之间的廊道在该粒度下将有变动;在S2和S3、S1和S3之间,方案在10m粒度下对原先生命过程促进最有限,并在该粒度下使廊道格局发生变化;在S1和S2之间,方案在10m粒度下对原先生命过程干扰最大.
As an explicit approach to model ecological security patterns, the minimum cumulative resistance （MCR） model, however, bears little attention the issue of fine scale both in research and practice. Accordingly, it is worth to attempt a mult-scale research on the ecological patterns of the exemplified Tianhe District, Benghu. First, explored the current situations at the grains of 10, 30, 60 m and 100 m consulting the regional eco-sources, S1 , S2 and S3, and ecological resistance matrixes, to simulated the permeation corridors among S1, S2 and S3, and to calculate the connectivity matrixes by associating cumulative resistance （or） among them based on MCR model then, conducted similar research on the planning layout. For evaluating the grain-specific influence of the planning on initial bio-process, introduced the Kappa index and the relative variation of cr desperately, to demonstrate the alternation of the corridor patterns and the connectivity among S1, S~ and S3 after the artificial disturbance. As conclusions, the planning promotes the initial bio-process among S~, S~ and Sa most in 100 m grain and invites new corridor patterns between S2 and S3, S3 and S1 under this graim improves the bio-process between S2 and S3, S3 and S1 least in 10 m grain and alters the corridor patterns between them accordingly; disturbs the bio-process between S1 and S2 most in 10 m grain. The discussion manifested the significance and necessity to parameterize the grain size into the simulation study.
出处
《复旦学报（自然科学版）》
CAS
CSCD
北大核心
2014年第6期737-746,F0002,F0003,共12页
Journal of Fudan University：Natural Science
基金
国家自然科学基金资助项目(51378127)
