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- Title
基于空间主成分和最小累积阻力模型的 内陆河景观生态安全评价与格局优化 ———以张掖市甘州区为例.
- Authors
Jing-hu, PAN; Xiao, LIU
- Abstract
Starting from ecological environment of inland river in arid area, the distribution of eco? logical security pattern of Ganzhou District was obtained by using the theory of landscape ecology, spatial principal component analysis (SPCA) and GIS techniques. Ten factors such as altitude, slope, soil erosion, vegetation coverage, and distance from road, were selected as the constraint conditions. According to the minimum cumulative resistance (MCR) model of landscape, the eco? logical corridor and nodes were established to optimize the structure and function of ecological func? tion network. The results showed that the comprehensive ecological security situation of the research area was on the average. Area of moderate level of security was 1318.7 km2, being the largest and accounting for 36.7% of the research area. The area of low level of security was mainly located in the northern part and accounted for 19.9% of the study area. With points, lines and surfaces being interlaced, a regional ecological network was constructed, which was consisted of six ecological cor? ridor, 14 ecological nodes, a large ecological source region and a plurality of small area source re? gion, and could effectively improve ecological security level of the study area.
- Publication
Yingyong Shengtai Xuebao, 2015, Vol 26, Issue 10, p3126
- ISSN
1001-9332
- Publication type
Article