道路网络对辽宁省森林生境的影响

道路及其网络形成不仅对景观格局产生影响,也对道路沿线的生境造成直接或间接的影响。因此道路网络研究对生态系统保护有重要价值,采用Forman的道路网络理论,以辽宁省为研究区,分析2010年道路网分布图和2020年高速公路规划图与森林生境的空间位置关系,研究道路网建设对森林生境的丧失、降级和破碎化产生的影响。研究表明:辽宁省国道、省道网络建设对森林生境丧失的影响大于对生境降级和生境破碎化的影响;而高速公路网络建设对森林生境的生境降级和生境破碎化影响大于对生境丧失的影响。2020高速公路网对辽宁省森林生境综合影响值为458,2010综合影响值为318,2020年比2010年上升了44.03%,而国道、省道对森林生境的综合影响值的增幅为11.39%,远低于高速公路网综合影响值的增长率。因此高速公路对森林斑块的危害性要比国道、省道等非封闭性的公路大得多。研究结果对辽宁省道路网布局的优化有重要的参考价值。

The influence of road network of forest habitat in Liaoning Province

#$NL: The road and network not only impact on landscape pattern formation, also direct or indirect impact habitat system of along the road. Therefore, the road network research on ecosystem protection of significant value, we use the theory of Forman"s road network, in Liaoning Province as the study area were analyzed road network in 2010 and 2020 maps highway plans and forest habitats spatial relationships, Research on the loss of forest road network construction habitat degradation and fragmentation of the impact. Studies have shown that: State Road, Liaoning Province, habitat degradation and habitat fragmentation effects affect provincial network construction of forest habitat loss is greater than; and Highway system of 2020 forest ecological system 458 in Liaoning province, 2010 the value of comprehensive influence is 318,2020 year than in 2010 increased by 44.03%, while the state roads, provincial roads influence on forest ecological system of the comprehensive value, an increase of 11.39%,the growth rate of comprehensive impact value is far lower than the freeways. So the highway to the dangers of forest patches than state roads, provincial roads, such as the closure of roads. Study results have important reference value for the optimization of the layout for road network.