摘要
以大理州森林资源二类调查数据为本底,在GIS技术支持下,针对景观内部组成结构和外部整体特征2种研究尺度,利用相关的景观类型指标(斑块数量、边缘密度、最大斑块指数等)和景观水平指标(景观多样性、分割度、蔓延度等)对研究区土地利用空间格局进行定量分析。结果表明,纯林是整个研究区生态系统中的优势组分,内部斑块大、聚集度高、在人为干扰下呈现一定的破碎状态。全州景观空间格局整体表现为斑块数量多、景观类型破碎化程度高且分布不均匀、对蔓延事件不敏感等特征。受地形、经济发展速度以及开发强度等因素的影响,破碎程度最大的是洱源县,最小的是云龙县。
Based on the survey data of forest resource,and GIS technology,by focusing the internal structure and external landscape overall characteristics as two research scales,the landscape class index（ such as number of patches,edge density,largest patch index,etc.） and landscape index（ such as landscape diversity,segmentation,contagion,etc.） were studied to quantitatively analyze landscape spatial patterns of Dali prefecture. The results showed that pure forest was the dominate group of ecological system in the study area,with large patches,high aggregation and high fragmentation under human disturbance. Landscape spatial pattern in Dali prefecture showed large number of patches,high fragmentation with uniform distribution,and less sensitive to spread events. Owning to economic development speed and land topography,high fragmentation happened in Eryuan county and low fragmentation in Yunlong county.
出处
《西部林业科学》
CAS
2015年第2期107-111,共5页
Journal of West China Forestry Science
基金
国家自然科学基金项目(41271230)
云南省中青年学术技术带头人培养项目(2008PY056)资助
关键词
林地
空间格局
大理州
forest land
landscape pattern
Dali prefecture
