Effect of Road Networks on Regional Landscape
(0) Road network expansion combined with the potential changes in landscape present challenges for landscape ecologists and conservation biologists throughout the world. But the effect of road networks on the relationship between different elements has not yet been well studied at regional scale with quantified methods. In the paper, the new invented index which is different from other traditional landscape pattern indices was used to evaluate obstructing function of the road networks on landscape in the study area, downstream of Lancang River, Yunnan Province, China. The results showed that the average probability of any two resource patches decreased by 24.2%, and the connection of landscape elements in total decreased by 15.30% with the road network overlay compared with the landscape without road networks. To draw the conclusion, road networks had negative effect on the relationships between landscape elements as a typical block and changed the importance of certain patches in accommodating the ecological processes in general by increasing the effect ive distance and then reducing the maximum movement probability between each two patches. In addition, the degree of obstructing function increased with the probability of the occurrence of certain ecological process decreased and the movement abilities of different ecological processes increased.
road ecology obstructing function landscape elements
FU Wei LIU Shiliang DONG Yuhong ZHANG Zhaoling
School of Environment,State Key Laboratory of Water Environment Simulation,Beijing Normal University Institute of Geographical Sciences and natural Resources Research,Chinese Academy of Sciences,Beijin
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
114-119
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）