环长白山旅游公路改扩建对景观格局的影响

Effect of Reconstruction and Expansion of Tourist Highway Circumscribing Changbai Mountain on Landscape Pattern

针对环长白山旅游公路改扩建工程,以ETM+遥感影像为基础数据,提取公路经过区域各景观要素信息,应用景观生态学分析软件Fragstats3.3计算该公路不同距离缓冲区的景观格局指数,通过分析其变化规律,定量化地研究环长白山旅游公路改扩建对公路沿线区域景观格局的影响。结果表明,公路改扩建导致不同缓冲距离带内斑块密度、Shannon多样性指数、景观分割指数增加,蔓延度指数、最大斑块指数减小;公路改扩建前后各景观指数的变化幅度随缓冲距离的增加而减小。环长白山旅游公路改扩建加剧了路域景观格局破碎化,对景观格局影响集中表现在200 m范围以内。

Based on the reconstruction and expansion of the tourist highway which circumscribing Changbai Mountain,ETM＋ remote sensing data of various landscape types were extracted.The changes of landscape pattern indices of different buffer zones were calculated by landscape ecology software Frasgstats3.3 to quantitatively analyze the landscape pattern affected by reconstruction and expansion of the road.The results show that（1） The reconstruction and expansion lead to patch density,Shannon-Wiener index and splitting index of different buffer zones increase while largest patch index and landscape contagion index decrease.（2）The variation range of each landscape index decreases with buffering distance increases after the reconstruction and expansion of the road.The reconstruction and expansion of this highway caused fragmentation of the landscape and the influence distributes in the roadside 200 m buffer zone.