岷江上游森林景观边界效应  

Edge effects of forest landscape in upper reaches of Minjiang River

作　　者：问青春[1] 李秀珍[1] 贺红士[1] 李丽光[2] 李月辉[1] 杨孟[1] 

机构地区：[1]中国科学院沈阳应用生态研究所 [2]中国气象局大气环境研究所,沈阳110016

出　　处：《应用生态学报》2007年第10期2202-2208,共7页Chinese Journal of Applied Ecology

基　　金：国家重点基础研究发展规划资助项目(2002CB111506).

摘　　要：应用地理信息系统和遥感技术对岷江上游森林景观在景观尺度上的边界效应进行了分析.结果表明:人工形成的林-农边界较清晰、其植被过渡明显,林地边缘的生物量低于林地内部,影响域为60m,农田边缘的生物量高于农田内部,边界效应范围为60～90m;自然形成的林-草边界过渡缓和,林地边缘的生物量低于林地内部,而草地边缘的生物量高于草地内部,边界效应对林地的影响范围为60m、对草地的影响范围为45～75m;林-灌边界的边界效应类似林-草边界,对林地影响域为60m,对灌木林地的影响域在45～75m之间.By using GIS and RS techniques, the edge effects of forest landscape in the upper reaches of Minjiang River, Sichuan Province of China were studied on landscape scale. The results showed that there was a distinct boundary between forestland and farmland, with the vegetation changed significantly. The biomass at forestland edge was lower than that in forestland interior, with the edge effect width being 60 m, whereas the biomass in farmland exterior was higher than that in farmland interior, With the edge effect width being 60-90 m. Forestland-grassland boundary was naturally formed and changed gradually. The biomass at forestland edge was lower than that in forestland interior, while that at grassland edge was higher than that in grassland interior, with the edge effect being 60 m for forestland and 45-75 m for grassland. The edge effect of forestland-shrub land boundary was similar to that of forestland-grassland boundary, with the edge effect width being 60 m for forestland and 45-75 m for shrub land.

关 键 词：景观边界 归一化植被指数 生物量 边界效应 岷江 

分 类 号：X171[环境科学与工程—环境科学]