摘要
以北京市延庆县1999年和2004年两期森林资源二类调查数据为基础,在ArcG IS的支持下,使用PatchAnalyst 4软件计算出10个景观指数,对研究区域的森林景观进行了要素组成、斑块特征、异质性和空间分布等的动态分析。结果表明,以土地类型和优势树种为依据的二级森林景观类型为标准,在以有林地为基质的森林景观格局中,由于人工和自然因素影响,其整体森林景观具有极强的异质性,并且有升高的趋势,使得有林地景观具有较高破碎度。同时非林地受人类活动影响严重,不规则斑块形状进一步加剧。通过对优势树种的二级森林景观类型划分,刺槐、杨树、阔叶杂木等先锋树种的斑块,侧柏、油松、落叶松等人工林树种的斑块,桦树、栎类等高海拔次生林树种的斑块都分别表现出与之生态和林学特性相适应的状态。
Based on the data from forest resources survey in Yanqing County of Beijing City in 1999 and 2004,under support of ArcGIS interface we analyze the composite elements,patch characteristics,heterogeneity and spatial distribution of forest landscape by calculating 10 landscape indexes with Patch Analyst 4 Software.It was shown,based on the land use and dominant tree species as the 2nd-class forest landscape standard and with afforested land as substrate in landscape pattern,the whole landscape presented with extremely strong heterogeneity and a tendency of increment,which made high degree of breaking up in afforest landscape.Meanwhile,irregular patches worsen owning to human activity in non-afforested land.By classification on dominant tree species in 2nd-class forest landscape,the trees correlate well with their related ecological and forest characteristic states in the patches of pioneer trees like acacia,popular and broadleaf trees,and patches of artificial forest with cypress,Chinese pine and larch,and lastly the high altitude secondary forest with birch and robur.
出处
《西部林业科学》
CAS
2010年第4期1-7,共7页
Journal of West China Forestry Science
基金
国家"十一五"科技支撑计划专题(2006BAD23B0202)
关键词
森林资源
二类调查
延庆县
森林景观格局
Forest resources
2nd-class survey
yanqing county
forest landscape pattern
