【摘 要】
：
The landscape fragmentation caused by road construction has many direct and indirect impacts on wildlife and ecosystems. By using the GIS and statistic software
【机 构】
：
College of Environmental Sciences, The Key Laboratory for Earth Surface Processes
论文部分内容阅读
The landscape fragmentation caused by road construction has many direct and indirect impacts on wildlife and ecosystems. By using the GIS and statistic software of fragmentation computation, a comprehensive index, road-induced landscape fragrmentation index (RLFI), is proposed to quantify the degree of landscape fragmentation resulting from different levels of road constructions. The results show that road-induced fragmentation index in China ranges from 0.987 to 3.357, with a mean of 1.846 in 2002. The regional differences of landscape fragmentation are obvious and scoring sequence is: North China (2.65)>East China (2.62)>Central China (2.60)>South China (2.51)>Southwest China (2.34)>Northeast China (2.19)>Inner Mongolia (1.88)>Northwest China (1.67)>Qinghai-Tibet Plateau (1.65). The anisotropic analysis indicates that the variation of fragmentation index in east-west direction is larger than that in south-north direction.
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