摘要
基于20世纪80年代末期(1980’s)、1995年、2000年和2008年的土地利用数据,采用破碎化模型及空间关联指数分析浙江省余杭区森林破碎化状态、趋势及干扰模式。对于2008年的森林破碎化模式,以乡镇为分析单位,建立了森林破碎度指数与城市化水平的统计关联,以期对中小城市发展过程中森林空间配置提供参考。结果表明:(1)1980’s至2008年期间,研究区森林覆盖率有所提高,但内部森林比例降低,穿孔森林、斑块森林、边缘森林、过渡森林均增加,表明森林破碎化程度加剧;(2)研究区森林所受人为干扰大大超过自然干扰,具体表现为农业干扰最强,城市化进程干扰次之,自然干扰贡献最小;(3)在乡镇尺度上,2008年的森林破碎化模式与城市化水平具有指数关联性:y=0.115 5e0.042 9x,R2为0.55。
Based on the land use data of the years of late 1980＇s, 1995, 2000 and 2008, a forest fragmentation model coupled with spatial metrics was applied to characterize the status and trends of forest fragmentation in Yuhang District, Zhejiang Province, China. A statistical link between forest fragmentation and urbanizatlan level in the fear of 2008 was furthe constructeal to provide an insight and implication for forest spatial configurations over medium and small cities. The results suggested that forest coverage increased slightly over the time period of lale 1980s to 2008 but the interior condition decreased accompanied with an increase for perforated, patch, edge and transitional components, indicating an accelerated forest fragmentation in the study area. Anthropogenic disturbances imposed on the forests were far greater than natural disturbances. Specifically, the strongest contribution to forest fragmentation was identified as agricultural land uses, followed by urban sprawl and natural land cover changes. For the land use data of the year of 2008, an exponential correlation y=0. 115 5e^0.0429x, with the determinant coefficient R2 =0.55, was simulated to llnk the fragmentation severity with the urbanization level.
出处
《西北林学院学报》
CSCD
北大核心
2012年第1期173-178,共6页
Journal of Northwest Forestry University
基金
国家自然科学基金项目(30972297)
教育部留学回国人员第40批科研启动基金
关键词
森林破碎化
城市化进程
驱动力
土地利用
遥感
forest fragmentation
urbanization process
driving forces
land use
remote sensing
作者简介
戎慧,女，硕士研究生，从事遥感及GIS应用研究。E-mail：ronghui_723@sohu．com．
通讯作者：李明诗，男，博士,副教授。主要从事遥感、GIS及其生态应用研究。E—mail：nfulms@yahoo．com．cn．
