岩溶地区公路修建对景观物种流的影响研究

通过对湖南岩溶地区公路旁边的植被进行调查，以景观生态学原理为基础，对各样方的物种组成、物种多样性以及物种相似性进行分析比较，定量地研究岩溶地区公路修建对景观物种流的影响。结果表明，岩溶地区公路修建对景观物种流既有正面影响也有负面影响。由于公路建设对地表植被和土壤的大量破坏，使景观要素发生变化，致使景观斑块的比例结构发生变化，朝着多优势度的方向发展，从而有利于物种的流动；同时，公路作为大型构筑物，其在景观相邻组分之间增加了一道屏障，也起着阻碍物种流动的作用。

Research into the influence of highway construction on species flowing in landscape in karst area

On the basis of the data from the vegetation survey besides the highway in karst area of Hunan,after the comparison of species composition,diversity and resemblance the influence that results from the highway building is quantitatively analyzed.The highway building in karst area has both positive and negative influences on landscape species flowing.As the vegetation and soil are heavily deteriorated,landscape elements have changed.The percentege constitution of landscape is developing to large dominance,which is beneficial to species flowing.However,the high way acts as a barrier between the landscape neighboring components,holding up the species flowing.